TM 3-4240-313-20&P SIMPLIFIED COLLECTIVE PROTECTION ...

TM 3-4240-313-20&P 

ORGANIZATIONAL MAINTENANCE MANUAL 

INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST 

SIMPLIFIED COLLECTIVE 

PROTECTION EQUIPMENT: M20A1 

(NSN 4240-01-330-7806) 

WARNING - This document contains export-controlled technical data whose export is 

restricted by the Army Export Control Act (Title 22, U.S.C., Sec 2751 et deq) or Executive 

Order 12470. Violation of these export laws are subject to severe criminal penalties. 

DISTRIBUTION STATEMENT C: Distribution authorized to U.S. Government agencies 

and their contractors to protect technical or operational information from automatic 

dissemination under the International Exchange Program or by other means. This 

detennination was made on 13 Nov 1986. Other requests for this document will be 

referred to: Technical Director, U.S. Army Edgewood Research, Development and 

Engineering Center, ATTN: SCBRD-ENL-V, Aberdeen Proving Ground, MD 21010-6423. 

DESTRUCTION NOTICE Destroy by any method that will prevent disclosure of contents 

or reconstruction of the document. 

HEADQUARTERS, DEPARTMENT OF THE ARMY 

17 NOVEMBER 1995


WARNING 

TOXIC HAZARD 

Decontaminate all contaminated equipment and personnel before erecting Simplified Collective Protection Equipment 

(SCPE). 

When erecting SCPE in a toxic environment, protective mask and clothing must be worn by all personnel until SCPE is 

deployed and operational. The amount of protective clothing will be determined by the unit commander. 

When SCPE is deployed in a toxic environment, it may take up to 1-1/2 hours from time blower is turned on to purge 

liner of toxic vapors. Personnel who must enter SCPE during 1-1/2 hour purge time shall wear clean, uncontaminated 

protective clothing. Failure to do so could result in prolonged purge time and recontamination of personnel. 

Do not locate blower near an area where exhaust gasses are generated because filter will not remove carbon monoxide. 

NOISE HAZARD 

The blower operating noise may be hazardous to operator hearing. Hearing protection must be worn when remaining 

within 4 feet of blower in operation. 

INJURY HAZARD 

Three major components of SCPE weigh approximately 100 pounds each. Lifting and/or carrying can be accomplished 

by no fewer than two personnel. 

Improper lifting of PE top when erecting may cause back strain to personnel. To avoid back strain follow proper lifting 

procedures. 

Sharp edges of the filter canister can cause injury to personnel. Use care when connecting or disconnecting air ducts to 

filter. 

Keep hands clear of leg hinges when erecting or striking protective entrance (PE). 

Keep flame, spark, and heat clear of SCPE. 

FIRE HAZARD 

HIGH VOLTAGE 

High voltage exists in motor blower and recirculation filter. To prevent electrical shock ensure motor blower power switch 

is in off (down) position before connecting or disconnecting power cable. 

Disconnect power cable before performing any maintenance procedures. 

For first aid information, refer to FM 21-11. 

FIRST AID 

a/(b blank)


Technical Manual 

No. 3-4240-313-20&P 

HEADQUARTERS 

Department of the Army 

Washington, D.C.,17 November 1995 

ORGANIZATIONAL MAINTENANCE MANUAL 

INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST 

FOR 

SIMPLIFIED COLLECTIVE PROTECTION EQUIPMENT: M20A1 

(NSN 4240-01-330-7806) 

REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS 

You can help improve this manual. If you find any mistakes or if you know of a way to improve 

the procedures, please let us know. Mail your letter or DA Form 2028 (Recommended Changes to 

Publications and Blank Form) direct to: Technical Director, U.S. Army Edgewood Research, 

Development and Engineering Center, ATTN: SCBRD-ENL-V, Aberdeen Proving Ground, MD 

21010-5423. A reply will be furnished to you. 

WARNING 

This document contains export-controlled technical data whose export is restricted by the Army 

Export Control Act (Title 22, U.S.C., Sec 2751 et seq) or Executive Order 12470. Violation of these 

export laws are subject to severe criminal penalties. 

DISTRIBUTION STATEMENT C: Distribution authorized to U.S. Government agencies and their 

contractors to protect technical or operational information from automatic dissemination under 

the International Exchange Program or by other means. This determination was made on 13 Nov 

86. Other requests forthis document will be referred to: Technical Director, U.S. Army 

Edgewood Research, Development and Engineering Center, ATTN: SCBRDENL-V, Aberdeen 

Proving Ground, MD 21010-5423. 

DESTRUCTION NOTICE Destroy by any method that will prevent disclosure of contents or 

reconstruction of the document. 

TABLE OF CONTENTS 

Page 

HOW TO USE THIS MANUAL ...............................................................................iv 

CHAPTER 1 INTRODUCTION ..................................................................................................1-1 

Section I General Information ......................................... ...................................................1-1 

Section II Equipment Description and Data .........................................................................1-3 

Section III Principles of Operation ........................................................................................1-9 

i


TABLE OF CONTENTS (CONT) 

Page 

CHAPTER 2 MAINTENANCE INSTRUCTIONS .... ................................................ ..................2-1 

Section I 

Repair Parts; Tools; Special Tools; Test, Measurement and 

Diagnostic Equipment (TMDE); and Support Equipment ................... ..................2-1 

Section II Service Upon Receipt ....................................................................... ..................2-1 

Section III Preventive Maintenance Checks and Services (PMCS) .................... ..................2-3 

Section IV Troubleshooting....................................... ............................................................2-14 

Section V Maintenance Procedures .....................................................................................2-19 

Section VI Preparation for Storage and Shipment .............................................. ..................2-43 

APPENDIX A 

APPENDIX B 

REFERENCES ................................................................................. ..................A-1 

MAINTENANCE ALLOCATION CHART ........................................... ..................B-1 

Page 

Illus/ 

Figure 

APPENDIX C 

Section I 

Section II 

REPAIR PARTS AND SPECIAL TOOLS LIST ................................. ...................C-1 

Introduction ..........................................................................................................C-1 

Repair Parts List ..................................................................................................C-1 

Group 00 M20A1 Simplified Collective Protection Equipment .............................................C-1-1 C-1 

Group 01 SCPE Room Liner Package ..................................................... ...........................C-2-1 C-2 

Group 02 Pressurized Protective Entrance ..................................................... ....................C-3-1 C-3 

0201 Protective Entrance Liner Assembly ...........................................................C-4-1 C-4 

020101 Dome Light..............................................................................................C-5-1 C-5 

Group 03 Recirculation Filter...............................................................................................C-6-1 C-6 

Group 04 Accessory Package..............................................................................................C-7-1 C-7 

0401 Short Air Duct Hose Assembly ....................................................................C-8-1 C-8 

040101 Straight Flange Adapter ..........................................................................C-9-1 C-9 

040102 Air Duct Hose Adapter ......................................................................C-9-1 C-9 

0402 Long Air Duct Hose Assembly ................................................. ...................C-10-1 C-10 

040201 Air Duct Hose Adapter ............................................................................C-10-1 C-10 

0403 Extension Light ........................................................................................C-11-1 C-11 

0404 Motor Blower Assembly ..............................................................................C-12-1 C-12 

ii


TABLE OF CONTENTS (CONT) 

Illus/ 

Page 

Figure 

Group 99 

Section III 

Section IV 

APPENDIX D 

APPENDIX E 

Bulk Items List ...................................................................................... ...........BULK-1 

Special Tools List (Not Applicable) 

National Stock Number and Part Number Index ...............................................C-I-1 

EXPENDABLE AND DURABLE ITEMS LIST ...................................... ...........D-1 

ILLUSTRATED LIST OF MANUFACTURED ITEMS .......................................E-1 

INDEX .................................................................................................................INDEX-1 

iii

HOW TO USE THIS MANUAL 


The SCPE Unit Maintenance Manual including Repair Parts and Special Tools List (TM 3-4240-313-20&P) contains 

information needed by unit maintenance crewmembers to perform maintenance authorized to them. An alphabetic 

index, located at the back of the manual, provides reference by page number to all areas of the manual. An index at the 

beginning of chapter 2 identifies all maintenance procedures location by paragraph and page number. 

Procedures contained in the SCPE Operator’s Manual (T 3-4240-313-10) are not repeated in this manual. Reference is 

made to the Operator’s Manual at points where an operator procedure is required. For example, erecting the protective 

entrance for inspection. 

The Unit Maintenance Repair Parts and Special Tools List (RPSTL) is provided as Appendix C. The RPSTL should be 

used as the source for parts identification and ordering information. A complete description of the RPSTL and associated 

National Stock Number and Part Number indexed is provided in Appendix C, Section I. 

iv/(v blank)


M20A1 Simplified Collective Protection Equipment 

1-0

CHAPTER 1 

INTRODUCTION 


1-1. SCOPE. 

Section I. GENERAL INFORMATION 

a. Type of Manual. This is the unit maintenance manual for use with the M20A1 Simplified Collective 

Protection Equipment (SCPE). 

b. Equipment Name and Model Number. Simplified Collective Protection Equipment: M20A1 

c. Purpose of Equipment. The SCPE M20AI is an inflatable system that will convert an interior room of an 

existing building into a positive pressure shelter for use against chemical and biological warfare agents and radioactive 

particles. The M2OAl allows personnel to perform assigned missions in a contaminated environment without the 

encumbrance of individual protective equipment. 

d. Special Limitations. The M20Al SCPE should be deployed in a structurally sound building. It must not be 

deployed outside, where it would be subject to wind, rain, solar heat loading, or direct contact with liquid agents. The 

SCPE does not provide: 

(1) Environmental control equipment (heating and cooling); however, interfaces are provided. 

(2) A portable source of electrical power (electrical generator). 

(3) NBC detection devices. 

(4) Protection from nuclear radiation, however, the SCPE does provide protection against radioactive 

particles. 

(5) Protection from carbon monoxide exhaust gasses. 

1-2. MAINTENANCE FORMS AND RECORDS. 

Department of the Army forms and procedures used for equipment maintenance will be those prescribed by DA 

PAM 738-750, The Army Maintenance Management System (TAMMS). 

1-3. DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE. 

For SCPE destruction procedures to prevent enemy use, refer to TM 43-0002-31 Destruction of Chemical 

Weapons and Defense Equipment to Prevent Enemy Use. 

1-4. PREPARATION FOR STORAGE OR SHIPMENT. 

Refer to page 2-43 for storage and shipment instructions. 

1-5. CORROSION PREVENTION AND CONTROL (CPC). 

a. Corrosion Prevention and Control (CPC) of Army material is a continuing concern. It is important that any 

corrosion problems with this item be reported so that the problem can be corrected and improvements can be made to 

prevent the problem in future items. 

b. While corrosion is typically associated with rusting of metals, it can also include deterioration of other 

materials such as rubber and plastic. Unusual cracking, softening, swelling, or breaking of these materials may be a 

corrosion problem. 

1-1


1-5. CORROSION PREVENTION AND CONTROL (CPC) (CONT). 

c. If a corrosion problem is identified, it can be reported using Standard Form 368. Use of key words such as 

"corrosion", "rust," "deterioration," or "cracking" will assure that the information is identified as a CPC problem. 

d. The Standard Form 368 should be submitted to: 

Director 

U.S. Army Armament and Chemical Acquisition and Logistics Activity 

ATTN: AMSTA-AR-QAW-A/ Customer Feedback Center 

Rock Island, Illinois 61299-6000 

1-6. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATION (EIR). 

If your SCPE needs improvement, let us know. Send us an EIR You, the user, are the only one who can tell us 

what you don't like about your equipment. Let us know why you don't like the design or performance. Put it on a 

Standard Form 368, Quality Deficiency Report. Mail it to us at Armament and Chemical Acquisition and Logistics 

Activity, ATTN: AMSTA-AR-QAW-A, Rock Island, IL 61299-6000. We will send you a reply. 

1-7. SAFETY, CARE, AND HANDLING. 

General warnings and hazard information is provided following the front cover of this manual (page a). Specific 

warnings are provided prior to procedural steps to which they apply. 

1-8. NOMENCLATURE CROSS-REFERENCE LIST. 

Common Name 

Cable Adapter 

(110 VAC or 220 VAC) 

Gage 

M20A1 SCPE 

Official Nomenclature 

Specialized Cable Assembly 

Differential Pressure Gage 

Simplified Collective Protection Equipment: M20AI 

1-9. LIST OF ABBREVIATIONS. 

A 

BTU 

cfm 

cm 

CPC 

DOT 

DRMO 

ECU 

HSFC 

Hz 

iwg 

kg 

kw 

Ampere 

British Thermal Unit 

Cubic feet per minute 

Centimeter 

Corrosion Prevention and Control 

Department of Transportation 

Defense Reutilization and Marketing Office 

Environmental Control Unit 

Hermetically Sealed Filter Canister 

Hertz 

Inches of water gage 

Kilogram 

Kilowatt 

1-2


1-9. LIST OF ABBREVIATIONS - Cont. 

m 

NA 

NBC 

PE 

VAC 

VDC 

Meter 

Not Applicable 

Nuclear, Biological, Chemical 

Pressurized Protective Entrance 

Volt Alternating Current 

Volt Directing Current 

Section II. EQUIPMENT DESCRIPTION 

1-10. EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES. 

a. Characteristics. 

(1) Transported by truck. 

(2) Operates from 110/220 VAC, 50/60 Hz power. 

(3) Easily maintained. 

b. Capabilities and Features. 

(1) Includes liquid agent resistant liner. 

(2) Provides a recirculation filter which filters and cleans air inside the shelter. 

(3) Has a PE that allows personnel to move from a contaminated area into the protective shelter without 

introducing contaminants. 

(4) Can be operated without HSFC when system is used for training. 

(5) Accessory package contains material and repair tape for restoring damaged liners, hoses, and PE to 

usable condition. 

(6) Provides adapters to interface with environmental control unit (ECU). Two types of MIL-A-52767 ECU 

can be interfaced: 

Type 1, Size C, 18,000 BTU compact vertical air conditioner or 

Type 2, Size C, 18,000 BTU compact horizontal air conditioner. 

(7) On-board spare gaskets to repair air duct hose adapter and filter adapter are stored in the accessory 

package. 

1-3


1-11. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS. 

The M20Al SCPE has five major components: 

(1) Room Liners 

(2) PE 

(3) HSFC 

(4) Recirculation filter 

(5) Accessory package with motor blower. 

a. Room Liners. The room liner (1) is sealed in a protective plastic bag and packed in rubber-coated-fabric 

liner carrier bag. Liners are made from plastic film that is resistant to toxic liquids and gasses. When a PE is attached 

and liner is pressurized, it provides a protective area for personnel. Room liners (1) can be attached to one another with 

a room adapter (2) (included in liner package) to increase protective area. Exterior loops and ties (3) on the top of the 

liner can be used to provide unpressurized support for the room liner (1). Each M20Al SCPE is issued with three 

complete room liner packages (two are on-board spares). 

1-4


b. Protective Entrance (PE). Consists of a collapsible aluminum support frame (1) and a butyl-coated fabric 

(2) enclosure. When erected, the PE is free standing. It is triangular in shape with fabric doors (3) on each side. Each 

door has a window (4), slit entrance with hook-and-pile fasteners (5), and hook-and-pile operated vents (6). One side has 

a flange (7) that is used to connect the PE to the room liner. The flange comes with two air duct sleeves (8). The outer 

edge of the flange has a mating hook-and-pile fastener (9). The PE also comes with interval timer (1), two gages (11), 

dome light (12), and power supply (13). Two carrying handles (14) are located on the top. One cable sleeve (15) is 

located on the inside door (flange side). 

1-5


1-11. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (CONT). 

c. Hermetically Sealed Filter Canister (HSFC). Contains gas and particulate filters which remove chemical 

and biological agents and radioactive particles. The HSFC is connected to the motor blower by the short air duct and to 

the SCPE liner through the PE by the long air duct (not shown). The HSFC (1) is hermetically sealed until pull-tabs (2) 

are removed. The HSFC remains in its shipping crate (3) for normal use. 

d. Recirculation Filter. The recirculation filter is a portable self-contained unit. It is used to filter any residual 

NBC contaminants inside a deployed SCPE liner. The cover (1) is attached to the case (2) by four link-lock fasteners (3). 

The case (2) houses the blower and the power switch (4). The power cord (5) plugs into the PE power supply and 

provides 110 VAC, 50/60 Hz to the blower. Air enters through the air inlets (6) and is forced downward through the 

replaceable filter element (7). Air exits through the air outlets (8). 

1-6


e. Accessory Package. The accessory package contains all materials required to initiate and sustain 

operation of SCPE. The accessory package is compact and manportable. It is designed to support the SCPE and 

contains the following: 

(1) Repair Material. Used for extensive repairs of SCPE liners. 

(2) Motor Blower. Provides air flow to inflate and continually purge liners and PE of contaminants. Provides 

power for extension light, recirculation filter, and PE dome light through the power supply located in the PE. 

(3) Short Air Duct (5 ft long). Provides airflow from blower to HSFC, has adapters in both ends. 

(4) Tape. Used to repair damaged liner, liner carrier bag, air duct hoses, and PE fabric. 

(5) 220 VAC Cable Adapter. Provides capability to use power cable in 220 VAC (European type) power 

receptacles or with a generator. 

(6) 110 VAC Cable Adapter. Provides capability to use power cable in I 10 VAC power receptacles or with a 

generator. 

(7) Extension Light. Provides interior light inside liner. 

(8) AC Power Cable Assembly. Provides electrical link between motor blower and 110/220 VAC cable adapters. 

(9) Accessory Case. Durable storage and carrying case for SCPE supplies and accessories. 

(10) Long Air Duct (7 ft long). Provides airflow from HSFC through PE to sealed liner. 

(11) Gaskets. On board spares used to repair air duct hose adapter and filter adapter. Consists of six filter 

adapter gaskets and three air duct hose adapter gaskets. 

1-7


1-12. DIFFERENCES BETWEEN MODELS. 

There is only one version of the M20A1 SCPE. 

1-13. EQUIPMENT DATA. 

a. Dimensions and Weights of SCPE Components. 

LENGTH WIDTH HEIGHT WEIGHT 

COMPONENT INCH CM INCH CM INCH CM LB KG 

PE (Packaged) 48 121.92 41 104.14 9 22.86 74 33.3 

Accessory Package 39 99.06 24 60.96 13 33.02 76 34.2 

Room Liner Package 30 76.20 24 60.96 12 33.02 37 16.65 

HSFC (Crated) 28 71.12 30 76.20 17 43.18 120 54.43 

Recirculation Filter 17 43.18 17 43.18 27 68.58 40 18.0 

(Packaged) 

b. Operating Power Requirements and Characteristics of SCPE. 

POWER INPUT AIRFLOW 

COMPONENT REQUIREMENTS VOLTAGE (CFM) 

Motor Blower 1654 WATTS 110 or 220 VAC 50/60 Hz 200 

Extension Light 100 WATTS 110 VAC NA 

Dome Light 14 WATTS 110 VAC NA 

(28 VDC) 

Recirculation Filter 300 WATTS 110 VAC NA 

1-8


Section III. PRINCIPLES OF OPERATION 

1-14. SYSTEM DESCRIPTION. 

a. To provide NBC protection, a higher pressure must exist inside the shelter than outside the shelter. The 

airflow that causes the pressure must pass through the HSFC. Small leaks in the shelter will have no effect as long as 

pressure is maintained inside shelter. 

b. When the system is pressurized, almost all airflow into shelter will flow back through PE to the contaminated 

exterior. 

c. The blower inflates the shelter to a pressure of 0.6 iwg. Vents between shelter and PE are adjusted for 

pressure of 0.6 iwg in shelter, and vents between PE and outside are adjusted for pressure of 0.25 iwg in PE. Clean air 

flowing from shelter to outside through PE purges toxic vapors from PE. 

1-15. FUNCTIONAL DESCRIPTION OF MAJOR COMPONENTS. 

a. Motor Blower. The blower provides a minimum of 200 cubic feet of air per minute to the protective shelter 

through the HSFC. It will operate on 110/220 VAC 50/60 Hz. Blower assembly provides electrical power for extension 

light and PE dome light through output connector J2 to the PE power supply. 

b. Hermetically Sealed Filter Canister (HSFC). This filter removes toxic chemical agents, biological agents, 

and radioactive particles from air passing through it. 

c. Air Ducts. The air ducts provide airflow path for air from blower through HSFC into shelter. 

d. Recirculation Filter. The recirculation filter removes residual toxic agents which may be present inside the 

SCPE liners. The recirculation filter blower motor operates from any 115 VAC 50/60 Hz electrical source. 

e. Room Liner. Room liners are cylindrical in shape and are inflated with filtered air from HSFC and blower. 

The inflated room liners provide a place to work or rest without having to wear protective clothing. 

f. Protective Entrance (PE). PE allows personnel to move from contaminated area into liner without 

introducing contaminants into protected area. 

g. Differential Pressure Gages. There are two gages that read from 0 iwg to 2.0 iwg. One is mounted on liner 

side of PE and measures difference in pressure between inside liner and outside. Another is mounted to inside wall of 

PE and measures difference in pressure between inside PE and outside. The gages are used when adjusting internal 

pressures in shelter and PE. An adjusting tool is provided to adjust gages before operation. 

h. Vents. Two vents near the bottom of the two outer PE walls are used to adjust PE pressure. Two vents near 

the top of the liner side of PE wall are used to adjust shelter pressure. PE and shelter pressure can be regulated by 

adjusting these vents. 

i. Dome Light. There is one dome light mounted to the ceiling of the PE which operates at 28 VAC supplied 

by PE power supply. 

j. Interval Timer. A mechanical five-minute bell timer is mounted on the wall of the PE. It is used to time the 

purge period of personnel entering the SCPE from contaminated areas. 

1-9/(1-10 blank)


CHAPTER 2 

UNIT MAINTENANCE 

Section I. REPAIR PARTS, SPECIAL TOOLS, TEST, MEASUREMENT, AND 

DIAGNOSTIC EQUIPMENT (TMDE), AND SUPPORT EQUIPMENT 

2-1. COMMON TOOLS AND EQUIPMENT. 

For authorized tools and equipment refer to the Modified Table of Organization and Equipment (MTOE) applicable 

to your unit. Common tools contained in General Mechanic's Automotive Tool Kit (GMTK), SC 5180-90N26, are used for 

unit maintenance. 

2-2. SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT. 

There are no special tools or equipment required for unit maintenance. 

2-3. REPAIR PARTS. 

Repair parts are listed and illustrated in Appendix C of this manual. 

2-4. SERVICE UPON RECEIPT OF MATERIAL. 

Section II. SERVICE UPON RECEIPT 

SERVICE UPON RECEIPT SCPE COMPONENTS 

LOCATION ITEM ACTION REMARKS 

1. PE Components a. Inspect for corrosion, fungus, 

paint damage, and deformation. 

b. Erect PE. TM 3-4240-313-10 

c. Reject PE if damage prevents 

it from functioning properly. 

2. Accessory Components a. Inspect for corrosion, fungus, 

Package 

paint damage, and deformation. 

b. Reject accessory package if 

damage prevents components 

from functioning properly or if 

components are missing. 

3. Room Liner Room Liners a. Inspect for fungus, tears, and rips. 

Package 

b. Reject liner package if liner 

wrapper has punctures or tears. 

2-1


SERVICE UPON RECEIPT - SCPE COMPONENTS (CONT) 

LOCATION ITEM ACTION REMARKS 

4. HSFC Components a. Inspect HSFC, especially around 

seams, for cracks, dents, holes, 

or water damage. Pull-tabs are 

damaged or missing. 

b. Reject HSFC if dented on a seam, 

cracked, dented deeper than 1/4 in., 

has holes, has been damaged by 

water, or pull-tabs are damaged or 

missing. 

5. Recirculation Components a. Inspect unit for cracks, holes, or 

Filter 

water damage. 

b. Reject unit if cracked, has holes, 

or has been damaged by water. 

Packaging a. Inspect filter protective foil bag 

for tears or punctures. 

b. Reject filter if protective bag is 

torn or punctured. 

2-5. CHECKING UNPACKED EQUIPMENT. 

a. Inspect the equipment for damage incurred during shipment. If the equipment has been damaged, report the 

damage on SF 364, Report of Discrepancies. 

b. Check the equipment against the packing slip to see if the shipment is complete. Report all discrepancies in 

accordance with the instructions of DA PAM 738-750 or DA PAM 738-751 as applicable. 

2-2

2-6. UNIT PMCS. 

Section III. UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) 


a. Purpose. The purpose of unit PMCS is to systematically and periodically inspect and service SCPE: 

b. Use. 

(1) To ensure that the equipment is ready for operation at all times. 

(2) To perform those PMCS procedures that are beyond the capability of the operator/crew. 

(3) To discover and correct defects before they result in serious damage or failure requiring timeconsuming 

repairs or replacement. 

(1) Schedule each of your units SCPE for unit PMCS every six months. 

(2) Use the semi-annual (every six months) schedule as a check list each time you perform the PMCS to 

make sure that you perform all required procedures. 

(3) Use the annual schedule as a check list every other time you perform PMCS. 

(4) Report and record all deficiencies and shortcomings, together with corrective actions taken, on DA 

Form 2404, Equipment Inspection and Maintenance Worksheet. 

c. Warnings and Cautions. Always observe the warnings and cautions appearing in your PMCS table. 

Warnings and cautions appear before the applicable procedures. You must observe all warnings and cautions to prevent 

serious injury to yourself or others and to prevent damage to your equipment. 

d. Table Entries. The following paragraphs describe the information presented in each column of the PMCS 

table. 

(1) Item Number Column. Numbers in this column are for reference. When completing DA Form 2404 

(Equipment Inspection and Maintenance Worksheet), include the item number for the check/service 

indicating a fault. Item numbers also appear in the order that you must do checks and services for the 

intervals listed. 

(2) Interval Column. This column tells you when you must do the procedure in the procedure column. 

(3) Item to Check/Service Column. This column identifies the item to be checked or serviced. 

(4) Procedure Column. This column gives the procedure you must do to check or service the item listed 

in the Item to Check/Service column to know if the equipment is ready or available for its intended 

mission or for operation. You must do the procedure at the time stated in the interval column. 

(5) No Fully Mission Capable If: Information in this column tells you what faults will keep your equipment 

from being capable of performing its primary mission. If you make check and service procedures that 

show faults listed in this column, do not operate the equipment. Follow standard operating procedures 

for maintaining the equipment or reporting equipment failure. 

e. Other Table Entries. Be sure to observe all special information and notes that appear in your table. 

2-3

UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M20A1 SCPE 

NOTE 


If the equipment must be kept in continuous operation, do only those procedures that can be 

done without disturbing operation. Make complete checks and services when the equipment is 

shut down. 

Item Item to Not Fully Mission 

No. Interval Check/Service Procedure Capable If: 

1 Semiannual 

Punctures or tears in wrapper. 

M20A1 

ROOM LINER 

PACKAGE 

a. Check carrier bags (1) for punc 

tures or tears. If punctures or 

tears are noted, remove liner 

(2) with protective wrapper and 

check wrapper for punctures or 

tears. If punctures or tears are 

noted in wrapper, replace liner 

and bag. 

b. Check carrier bag (1) to ensure 

it contains one liner (2) and one 

room adapter (3). If item is 

missing, obtain another M20A1 

room liner package. 

Room liner or room adapter 

missing. 

2-4




2 Semi 

annual 

PEFRAME a. Erect PE (TM 3-4240-313-10). 

Check for distorted, cracked or 

bent frame (1). Check for 

broken or missing hinge pins (2) 

(three on each leg). Check that 

legs are locked and knobs (3) 

are present. Check for broken 

or missing link-lock fasteners 

(4). Replace PE if defective. 

Frame cracked or bent. Hinge 

pin or locking knob is missing. 

Legs cannot be locked. 

b. Check for broken or missing 

interval timer (5) and gages (6). 

Adjust gages to zero. Replace 

if necessary. 

Interval timer and/or gages 

broken or missing. Gages will 

not adjust to zero. 

2-5

UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M20A1 SCPE (CONT) 




3 Semiannual 

PE FABRIC 

Check for punctures, tears, broken 

windows (1), missing vent flaps 

(2), separated seams or worn 

hook-and-pile fasteners. Restore 

to usable conditions as 

necessary. 

Fabric punctured or torn, 

windows broken, vent flaps 

missing, seams separated, 

hook-and-pile fasteners worn. 

4 Semiannual 

PE POWER 

Check power supply (3) for dents or 

SUPPLY cracks. Inspect both 

power cords (4) for bare wires, 

cracked or split insulation or 

connectors or missing connector 

or missing connector pins (5) 

connector pins. 

Power supply dented or 

cracked. Power cord has bare 

wires, cracked or split 

insulation or connectors or 

missing connector or missing 

2-6




5 Semiannual 

HSFC 

Check HSFC (1), especially around 

seams (2), for cracks, dents, 

holes, or water damage. 

Replace HSFC if dented on a 

seam, cracked, dented deeper 

than 1/4 in., has holes, or has 

been damaged by water. 

HSFC is dented on a seam, 

cracked, or dented deeper 

than 1/4 in., has holes, or has 

been damaged by water. 

6 Semiannual 

ACCESSORY 

PACKAGE 

Check for missing components. 

Replace components as 

necessary (App C). 

Components missing. 

2-7





7 Semiannual 

AIR DUCTS 

Check air duct hoses (1) for 

punctures or tears or protruding 

wires. Check for cracked or bent 

adapters (2) or missing or 

damaged hose clamps (3). 

Check for missing cracked or 

cut gaskets (4). Restore hoses 

to operating condition. Replace 

damaged or missing parts (para 

2-11). 

Air duct has punctured, torn or 

protruding wires, damaged or 

missing hose clamps, cracked 

or bent adapters or missing, 

cracked or cut gaskets. 

8 Semiannual 

ELECTRICAL 

CABLES 

(POWER CABLE 

CABLE 

ADAPTERS) 

Check cables (1) for cut or torn 

insulation. Check connector 

housing (2) for bent or missing 

prongs (3). Replace damaged 

electrical cables or adapters. 

Cable insulation is cut or torn, 

bent or missing connector 

prongs. 

2-8




9 Semiannual 

MOTOR BLOWER a. Check to see if 550 hrs have 

elapsed on time totalizing meter 

(1) since last motor change. If 

550 hrs have elapsed, replace 

air filter, both blower motors, 

Time totalizing meter reads 

more than 550 hrs. 

gaskets, and time totalizing 

meter (para 2-13a). 

b. Check for cracked, broken, or 

distorted housing (2). 

c. Check air outlet flange (3) for 

damaged, bent, or missing 

prongs. Check for damaged 

outlet port or missing electronic 

component shield (7). 

d. Check for damaged electrical 

connectors (4). Check for 

damaged or missing electrical 

connector covers (5). 

e. Check for loose or missing 

screws (6). Tighten loose 

screws (6). 

Housing cracked, broken, or 

distorted. 

Outlet flange damaged, bent 

or missing prongs. Electronic 

component shield damaged or 

missing. 

Electrical connectors or covers 

are damaged or missing. 

Missing screws. 

Replace missing or damaged 

parts (para 2-13). 

2-9





9 Semi 

annual 

MOTOR BLOWER f. Remove access cover (1), air 

(CONT) filter (2), and cover 

plate (3) (para 2-13a). Check 

for damaged electronic 

component shield (4) or gaskets 

(5). 

Electronic components shield 

or gaskets damaged. 

10 Semiannual 

EXTENSION 

LIGHT 

a. Check cord (1) for cut, cracked 

or torn insulation. Check 

connector housing (2) for 

cracks, missing screws, bent or 

missing prongs. 

Cord insulation cracked or 

torn, connector cracked, 

missing screws, or bent or 

missing prongs. 

b. Check for cracked or missing 

cover (3). 

Cover cracked or missing. 

c. Plug light in to ensure light is 

operational. 

Light not operating. 

2-10


Item Item To Not Fully Mission 

No Interval Check/Service Procedures Capable If : 

11 Annual PE DOME a. Replace both lamps in dome 

LIGHT 

light (para 2-9e). 

b. Check dome light for bent or Retainer cracked or bent, lens 

cracked retainer (1), cracked or cracked or broken, lamps 

broken lens (2), inoperative 

inoperative, torn or gasket. 

Deteriorated lamps (3), torn or 

deteriorated gasket (4). Replace 

if necessary (para 2-9). 

2-11


Section IV. TROUBLESHOOTING 

2-7. SCOPE. 

a. The troubleshooting table lists common malfunctions which you may find during the operation or 

maintenance of the SCPE or its components. You should perform the test/inspection and corrective action in the order 

listed. 

b. This manual cannot list all malfunctions that may occur, nor all test or inspections and corrective actions. If 

a malfunction is not listed or is not corrected by listed corrective actions, notify your supervisor. 

c. Use the following symptom index to locate troubleshooting procedures. 

SYMPTOM INDEX 

Malfunction Symptom 

Troubleshooting 

Procedure 

Page 

1. PRESSURE LOW IN ROOM LINER OR PE. 2-13 

2. MOTOR BLOWER NOT OPERATING PROPERLY. 2-14 

3. LOW AIRFLOW FROM BLOWER. 2-14 

4. NOISY MOTOR BLOWER OPERATION. 2-15 

5. RECIRCULATION FILTER BLOWER NOT OPERATING PROPERLY. 2-15 

6. EXTENSION LIGHT NOT WORKING. 2-16 

7. DOME LIGHT IN PE NOT WORKING. 2-16 

2-12


TROUBLESHOOTING 

MALFUNCTION 

TEST OR INSPECTION 

CORRECTIVE ACTION 

1. PRESSURE LOW IN ROOM LINER OR PE. 

Step 1. Check for motor blower not operating properly. 

See malfunction 2. 

Step 2. Check air ducts for damaged duct, adapters, or damaged or missing gaskets and clamps on 

adapters. 

Restore torn ducts to operational condition using tape from accessory package. 

Replace damaged duct. 

Replace damaged adapters or missing gaskets and clamps on adapters (para 2-11). 

Step 3. Check for no airflow from HSFC. 

Replace HSFC as required. 

Step 4. Check for proper pressure in PE. 

Check gage tubing for damage. 

Replace gage tubing if required (para 2-9). 

Check PE doors to ensure they close completely. 

Replace PE if required. 

Step 5. Check SCPE liners and PE for tears or punctures. 

Restore to operational condition using repair material and tape from accessory package. 

Replace liner if pressure cannot be maintained after repairing with tape. 

2-13


MALFUNCTION 



TROUBLESHOOTING (CONT) 

2. MOTOR BLOWER NOT OPERATING PROPERLY. 

WARNING 

High voltage exists in blower. Be sure to disconnect power cable 

before removing cover. 

Step 1. Check for proper connection of power cable and cable adapter. 

Replace cable and adapter as required. 

Step 2. Check for cracks and breaks. 

Replace if damaged. 

Step 3. Check for no or low airflow from blower. 


Step 4. Check for noisy blower operation. 


3. LOW AIRFLOW FROM MOTOR BLOWER. 

Step 1. Check for dirty or clogged air filter. 

Change air filter (para 2-13). 

Step 2. Check for damaged or clogged electronic component shields. 

Replace electronic component shields as required (para 2-13). 

Step 3. Check for one or both motors not electrically connected to blower. 

Connect both motors (para 2-13). 

Step 4. Check for one or both blower motors not operating. 

Replace air filter element, gaskets, time totalizing meter, and both motors (para 2-13). 

Step 5. Replace motor blower. 

2-14


MALFUNCTION 




4. NOISY MOTOR BLOWER OPERATION. 

Step 1. Check for loose or missing screws, nuts, bolts, or parts. 

Tighten loose screws, nuts, bolts. Replace missing screws, nuts, bolts, or parts. 

Step 2. Check for improper installation of motors. 

Properly install motors. Make sure inner rubber gaskets under motors are seated properly. 

Step 3. Replace air filter element, both motors, gaskets, and time totalizing meter (para 2-13). 

5. RECIRCULATION FILTER BLOWER NOT OPERATING PROPERLY. 

Step 1. Check for recirculation filter blower, extension light in liner, and dome light in PE all not working. 

Reset circuit breaker on motor blower. 

Step 2. Check for proper connection of power cable and cable adapter. 

Replace power cable and cable adapter as required. 

Step 3. Check for cracks and breaks. 

Replace if damaged. 

Step 4. Check for dirty or clogged filter element. 

Change filter element (para 2-10). 

Step 5. Check fan impeller blades for damage. 

Replace fan impeller (para 2-10). 

Step 6. Replace recirculation filter. 

2-15


MALFUNCTION 




6. EXTENSION LIGHT NOT WORKING. 

Step 1. Check for proper connection of extension light cord to PE, power cord from PE to connector on 

motor blower, and power cable from connector on motor blower to power source. 

Connect cables (TM 3-4240-313-10). 

Step 2. Check to see if motor blower is not operating. 


Step 3. Replace extension light lamp (para 2-12). 

Step 4. Replace extension light. 

7. DOME LIGHT IN PE NOT WORKING. 

Step 1. Check for proper connection of power cord from PE to connector on motor blower, and power cable 

from connector on motor blower to power source. 

Connect cables (TM 3-4240-313-10). 

Step 2. Check to see if motor blower is not operating. 


Step 3. Replace both incandescent lamps in dome light (para 2-9). 

2-16


Section V. MAINTENANCE PROCEDURES 

2-8. GENERAL. 

The maintenance procedures in this section are to be performed by a unit maintenance technician or by the user 

under Unit Maintenance supervision. This section contains detailed maintenance procedures for the following 

component 

repair or replacement. 

PARA PROCEDURE PAGE 

2-9 PROTECTIVE ENTRANCE REPAIR.............................................................................. 2-18 

a. Differential Pressure Gage Replacement .............................................................. 2-18 

b. Gage Tubing Replacement ................................................................................... 2-19 

c. Gage Tubing Straight Pipe Adapter Replacement ................................................. 2-21 

d. Interval Timer, Stamped Nut, and Knob Replacement .......................................... 2-22 

e. Dome Light Lamp Replacement............................................................................ 2-23 

f. Dome Light Gasket, Lens, and Lens Retainer Replacement.................................. 2-24 

2-10 RECIRCULATION FILTER REPAIR............................................................................... 2-25 

a. Filter Element Replacement.................................................................................. 2-25 

b. Axial Fan Impeller and Bottom Access Cover Replacement.................................. 2-26 

2-11 AIR DUCT HOSE ASSEMBLY REPAIR ......................................................................... 2-27 

a. Air Duct Hose, Clamp, and Adapter Replacement................................................. 2-27 

b. Air Duct Hose Adapter Gasket Replacement......................................................... 2-28 

2-12 EXTENSION LIGHT LAMP REPLACEMENT ................................................................. 2-29 

2-13 MOTOR BLOWER REPAIR ........................................................................................... 2-30 

a. Air Filter, Motors, Gaskets and Time Totalizing Meter Replacement ..................... 2-30 

b. Electronic Components Shield Replacement......................................................... 2-39 

2-17


2-9. PROTECTIVE ENTRANCE REPAIR. 

This task covers: 

a. Differential Pressure Gage Replacement. d. Interval Timer, Stamped Nut, and Knob 

b. Gage Tubing Replacement. Replacement. 

c. Gage Tubing Straight Pipe Adapter e. Dome Light Lamp Replacement. 

Replacement. f. Dome Light Gasket, Lens, and Lens Retainer 

Replacement. 

a. Differential Pressure Gage Replacement. 

INITIAL SETUP 

Tools 

General Mechanic's Automotive Tool Kit SC 5180-90-N26 

Materials Parts 

Lockwasher (3) PN MS35338-136 

REMOVAL 

1. Pull tubing (1) from straight pipe adapter (2) on 

side of gage (3). 

2. Remove three screws (4), lockwashers (5), and 

flat washers (6). 

3. Remove gage (3) and bracket (7). 

INSTALLATION 

1. Position gage (3) and bracket (7). 

2. Install three flat washers (6), lockwashers (5), 

and screws (4). 

3. Push tubing (1) onto straight pipe adapter (2) 

on side of gage (3). 

2-18


b. Gage Tubing Replacement. 

INITIAL SETUP 

Tools 

General Mechanic's Automotive Tool Kit 

SC 5180-90-N26 

REMOVAL 

NOTE 

This procedure is used for either the interior or exterior protective entrance gage. 

1. Pull tubing (1) from straight pipe adapter (2) on side of gage (3). 

2. Pull tubing (1) from straight pipe adapter (4) on protective entrance (5). 

3. Obtain new piece of tubing (1) from bulk stock and cut correct length (Fig. E-3 and E-4, App E). 

2-19


2-9. PROTECTIVE ENTRANCE REPAIR (CONT). 

INSTALLATION 

1. Install tubing (1) to straight pipe adapter (4) on protective entrance (5). 

2. Install other end of tubing (1) to straight pipe adapter (2) on side of gage (3). 

2-20


c. Gage Tubing Straight Pipe Adapter Replacement. 

INITIAL SETUP 

Tools 


Personnel Required 

Two 

Materials/Parts 

Locknut PN WW-P471CQQBCA 

REMOVAL 

NOTE 

This procedure is used for either interior or exterior gage tubing straight pipe adapter. 

Removal/installation of straight pipe adapter on interior PE wall requires two personnel. One 

inside PE and one outside. 

1. Pull tubing (1) from interior side of straight pipe adapter (2). 

2. Hold interior side of adapter (2). At exterior side remove locknut (3) and flat washer (4). 

3. At interior side, pull adapter (2) and flat washer (5) away from PE fabric. 

INSTALLATION 

1. Assemble flat washer (5) and straight pipe adapter (2) and insert through PE fabric and hold. 

2. At exterior, install flat washer (4) and locknut (3) on adapter (2). Tighten locknut (3). 

3. At interior side, push tubing (1) onto adapter (2). 

2-21



d. Interval Timer, Stamped Nut, and Knob Replacement. 

INITIAL SETUP 

Tools 


REMOVAL 

1. Pull knob (1) off. 

2. Remove stamped nut (2). 

3. Remove faceplate (3). 

4. Remove and discard timer (4). 

INSTALLATION 

CAUTION 

Timer will not work correctly if it is 

improperly mounted. 

1. Install timer (4) with prongs lined up with holes 

in bracket, ensuring TOP marking is toward 

short side of bracket. 

2. Position faceplate (3) over prongs of timer 

ensuring "0' is on TOP position. 

3. Install stamped nut (2). 

4. Push on knob (1). 

2-22


e. Dome Light Lamp Replacement. 

INITIAL SETUP 

Tools 


REMOVAL 

NOTE 

When one lamp fails, replace both lamps. 

1. Remove six screws (1), retainer (2), lens (3), 

and gasket (4). 

2. Remove two lamps (5) by pushing in and 

turning lamps counterclockwise. 

INSTALLATION 

1. Install two lamps (5) by pushing in and turning 

lamps clockwise. 

2. Install gasket (4), lens (3), retainer (2), and six 

screws (1). 

2-23



f. Dome Light Gasket, Lens, and Lens Retainer Replacement. 

INITIAL SETUP 

Tools 


REMOVAL 

1. Remove six screws (1), retainer (2), lens (3), 

and gasket (4). 

2. Discard defective lens retainer, lens, or gasket. 

INSTALLATION 

1. Install gasket (4), lens (3), retainer (2), and six 

screws (1). 

2-24


2-10. RECIRCULATION FILTER REPAIR. 


a. Filter Element Replacement 

b. Axial Fan Impeller and Bottom Access Cover Replacement. 

a. Filter Element Replacement. 

INITIAL SETUP 

Tools 

No tools required 

REMOVAL 

NOTE 

Change filter in recirculation filter unit 

after becoming wet, damaged, or 

contaminated. Refer to FM 3-4. 

1. Disconnect recirculation filter unit (1) from 

power source. 

2. Unlatch four link-lock fasteners (2) on cover 

(3). 

3. Remove cover (3) and filter element (4). 

INSTALLATION 

1. Install new filter element (4). 

2. Replace cover (3). 

3. Latch four link-lock fasteners (2). 

2-25


2-10. RECIRCULATION FILTER REPAIR (CONT). 

b. Axial Fan Impeller and Bottom Access Cover Replacement. 

INITIAL SETUP 

Tools 


REMOVAL 

1. Position recirculation filter with bottom access 

cover (1) facing up. 

2. Remove three screws (2) from bottom access 

cover (1). 

3. Remove four screws (3), four nuts (4), four 

lock washers (5), and four washers (6) from 

filter housing and remove guard (7). 

4. Remove three screws (8) from fan hub (10) 

and remove axial fan impeller (9). 

INSTALLATION 

1. Position axial fan impeller (9) on fan hub (10) 

and install three screws (8). 

2. Position bottom access cover (1) and install 

three screws (2). 

2-26


2-11. AIR DUCT HOSE ASSEMBLY REPAIR. 


a. Air Duct Hose, Clamp, and Adapter Replacement 

b. Air Duct Hose Adapter Gasket Replacement. 

a. Air Duct Hose, Clamp, and Adapter Replacement. 

INITIAL SETUP 

Tools 


REMOVAL 

NOTE 

This procedure is used for either short 

or long air duct hose, clamp, and 

adapter replacement. 

1. Loosen hose clamp (1). 

2. Remove hose adapter (2, 3, or 4) and clamp 

(1) from air duct hose (5 or 6). 

3. Repeat steps 1 and 2 to remove all adapters. 

4. Discard defective hose, clamp, or adapter. 

INSTALLATION 

1. Position hose clamp (1) around long air duct 

hose (5) or short air duct hose (6). 

2. Insert long hose adapter (2), short hose 

adapter (HSFC end) (3), or short hose adapter 

(blower end) (4) into air duct hose. 

3. Tighten hose clamp (1). 

4. Repeat steps 1, 2, and 3 for all adapters. 

2-27


2-11. AIR DUCT HOSE ASSEMBLY REPAIR (CONT). 

b. Air Duct Hose Adapter Gasket Replacement. 

INITIAL SETUP 

Tools 

Pocket Knife (Item 5, App D, Sect II) 

NOTE 

This procedure is used for either short or long air duct hose adapter gasket replacement. 

REMOVAL 

1. Remove old gasket (1 or 2). 

2. Scrape old adhesive and gasket material from adapter surface (3). 

INSTALLATION 

1. Peel away adhesive backing tape from new HSFC adapter gasket (1) or motor blower adapter gasket (2). 

2. Position gasket on adapter (3) with adhesive side toward hose and press firmly in place. 

2-28


2-12. EXTENSION LIGHT LAMP REPLACEMENT. 


Extension Light Lamp Replacement. 

INITIAL SETUP 

Tools 

No tools required 

REMOVAL 

WARNING 

Ensure light is disconnected from power source before performing maintenance procedure. 

Electric shock can cause serious injury or death. 

1. Unscrew top portion of bulb cage (1) from extension light (2). 

2. Remove lamp (3). 

INSTALLATION 

1. Install new lamp (3). 

2. Screw top portion of bulb cage (1) on extension light (2). 

2-29


2-13. MOTOR BLOWER ASSEMBLY REPAIR. 


a. Air Filter, Motors, Gaskets, and Time Totaling Meter Replacement. 

b. Electronic Components Shield Replacement. 

a. Air Filter, Motors, Gaskets, and Time Totsli7ing Meter Replacement. 

INITIAL SETUP 

Tools 


REMOVAL 

WARNING 

Hazardous voltage exists in motor 

blower assembly. Ensure power switch 

is in down (off) position, then 

disconnect power cable from power 

source before performing maintenance 

procedures. Electrical shock can cause 

serious injury or death to personnel. 

NOTE 

When one motor fails, replace both 

motors, gaskets, air filter, and time 

totalizing meter. 

1. Access Cover. 

(a) 

Remove four screws (1), lockwashers 

(2), and flat washers (3) from access 

cover (4). 

(b) Remove access cover (4). 

2-30


2. Air Filter. 

(a) 

Remove two screws (5), small flat washers (6) and large flat washers (7) from air filter (8) on cover 

plate (9). 

(b) Remove and discard air filter (8). 

2-31


2-13. MOTOR BLOWER ASSEMBLY REPAIR (CONT). 

a. Air Filter, Motors, Gaskets and Time Totalizing Meter Replacement (Cont). 

REMOVAL (CONT). 

3. Cover Plate. 

(a) Remove six screws (10), lockwashers (11), and flat washers (12) from cover plate (9). 

(b) 

blower housing. 

Tilt cover plate (9) upward. While holding cover plate, disconnect two electrical connectors (13) inside 

2-32


4. Motors. 

(a) 

Turn cover plate (9) upside down, place on flat work surface. 

(b) Remove three screws (14), lockwashers (15), and flat washers (16), from motor blower support (17). 

(c) 

Remove case grounding wire (18) from motor grounding junction terminal (19). Retain grounding wire. 

(d) Remove blower support (17). 

(e) Remove motor (21). 

(f) Remove motor upper gasket (20). 

(g) Remove lower gasket (27). 

(h) 

Repeat steps (b) thru (g) for other motor. 

2-33



a. Filter, Motors, Gaskets, and Time Totalizing Meter Replacement (Cont). 


5. Time Totalizing Meter. 

(a) Remove three screws (22) and flat washers (23) from time totalizing meter (24). 

(b) Pull out time totalizing meter (24). 

(c) Remove two screws (25) and lockwashers (26) from back of time totalizing meter (24). 

(d) Remove two wires (27). 

(e) 

Remove time totalizing meter (24) and discard. 

2-34


INSTALLATION 

1. Time Totalizing Meter. 

NOTE 

Use screws and lockwashers supplied with new time totalizing meter. 

(a) Install two wires (27) and two screws (25) and lockwashers (26) to back of time totalizing meter (24). 

(b) Install time totalizing meter (24). 

(c) Install three screws (22) and flat washers (23) to time totalizing meter (24). 

2-35




INSTALLATION (CONT). 

2. Motors. 

(a) 

Install two lower gaskets (27) in place on 

cover plate (9). 

(b) Place upper gasket (20) on motor (21). 

(c) Place motor (21) on lower gasket (27). 

NOTE 

When installing blower support ensure 

one end of case grounding wire is 

installed to blower support screw that 

is closest to motor grounding junction 

terminal. 

(d) 

Place blower support (17) on upper 

gasket (20) and aline blower support 

screw posts (17) with cover plate posts. 

NOTE 

Only one motor in the motor blower 

requires the case grounding wire. 

(e) 

Install three screws (14), lockwashers 

(15), flat washers (16) and one end of 

case grounding wire (18) to blower 

support (17). 

NOTE 

Ensure that green grounding motor 

wire and case grounding wire are 

installed on grounding junction 

terminal. 

(f) Install green motor grounding wire (18) 

to motor grounding wire terminal (19). 

(g) 

(g) 

Install case grounding wire (28) to rear 

grounding wire terminal (29). 

Repeat steps (b) thru (e) for other motor. 

2-36


3. Cover Plate. 

(a) 

Tilt cover plate upward. While holding cover plate, connect two electrical connectors (13) inside 

blower housing. 

(b) Install cover (9), six screws (10), lockwashers (11), and flat washers (12). 

2-37





4. Air Filter. 

(a) 

Place air filter (8) on top of cover plate (9) with support grid facing down. 

(b) Install two screws (5), small flat washers (6) and large flat washers (7) to air filter (8) on cover plate (9). 

5. Access Cover. 

(a) Install access cover (4). 

(b) Install four screws (1), lockwashers (2), and flat washers (3). 

2-38


b. Electronic Components Shield Replacement. 

INITIAL SETUP 

Tools 


Pocket Knife (Item 5, App D, Sect II) 

REMOVAL 

NOTE 

This procedure is used to replace all 

electronic component shielding 

elements. Replace shield only if 

damaged, restricting air flow or 

electrical bonding capabilities have 

decreased. 

NOTE 

Retain air filter to install after shield 

replacement. 

1. Remove access cover and air filter (para 2- 

13a, steps I and 2). 

2. Cover Plate Electronic Components Shield. 

(a) 

(b) 

Remove fourteen screws (1) from cover 

plate electronic components shield (2) 

and cover plate (3). 

Remove and discard damaged cover 

plate electronic components shield (2). 

2-39



b. Electronic Components Shield Replacement (Cont). 


3. Shielding Gaskets. 

(a) Remove cover plate (3) (para 2-13a, step 3). 

(b) Remove old gasket material from cover plate gasket grooves (4). 

(c) Clean adhesive material from cover plate gasket grooves (4). 

4. Outlet Port Electronic Components Shield. 

(8). 

(a) 

(b) 

Remove four self-locking nuts (5) lockwashers (6), and flat washers (7) at edge of outlet port electronic 

components shield (8). 

Remove four screws (9) and remove and discard damaged outlet port electronic components shield 

2-40

INSTALLATION 


1. Outlet Port Electronic Components Shield. 

(a) Hold outlet port electronic components shield (8) in place on inside of blower housing with wire mesh gasket 

side against housing. Insert screw (9) from outside of blower housing. 

(b) Install flat washer (7), lockwasher (6), and self-locking nut (5) and hand tighten. 

(c) Repeat steps (a) and'(b) for three remaining fasteners. 

(d) Tighten four self-locking nuts (5). 

2-41



b. Electronic Components Shield Replacement (Cont). 


2. Shielding Gaskets. 

(a) Fabricate two 12.25 in. and three 16.25 in. 

gaskets (Fig. E-2, Fig. E-l, App E). 

(b) Apply adhesive (Item 1, App D, Sect II) to cover 

plate gasket groove (4). Smooth with finger for a 

uniform coating. 

NOTE 

Gasket material should completely fill 

gasket grooves. Be sure that wider side of 

gasket is in contact with cover plate. 

(c) Position gaskets in cover plate gasket grooves and 

press firmly in place. 

(d) Install cover plate (3) in blower housing (para 2- 

13a, step 3). 

3. Cover Plate Electronic Components Shield. 

(a) Position cover plate electronic components shield 

(2), with wire mesh gasket side down, on cover 

plate. Install fourteen screws (1). 

(b) Tighten fourteen screws (1). 

4. Install air filter and access cover (para 2-13a, steps 4 

and 5). 

2-42

Section VI. PREPARATION FOR STORAGE AND SHIPMENT 


2-14. SECURITY PROCEDURES 

The SCPE is a non-sensitive item and may be stored or shipped using standard storage and transportation 

handling procedures. 

2-15. STORAGE. 

The SCPE should be stored as a complete system. Only the HSFC should remain crated. 

2-16. PRESERVATION, PACKAGING, PACKING, MARKING, AND SHIPPING REQUIREMENTS. 

No special requirements exist for the SCPE. Shipment from storage to site should be made as a complete system. 

Only the HSFC will be shipped crated. 

2-43/(2-44 blank)


APPENDIX A 

REFERENCES 

A-1. SCOPE 

This appendix lists all technical manuals, field manuals, DA Pamphlets, forms, and bulletins referenced in this 

manual. 

A-2. TECHNICAL MANUALS 

Destruction of Chemical Weapons and Defense Equipment 

to Prevent Enemy Use............................................................................................................ TM 43-0002-31 

Chemical, Toxicological and Missile Fuel 

Handler Protective Clothing .................................................................................................... TM 10-277 

Operators Manual for M20AI SCPE............................................................................................... TM 3-4240-313-10 

A-3. FIELD MANUALS 

NBC Protection ........................................................................ .................................................... FM 3-4 

NBC Decontamination .................................................................................................................. FM 3-5 

First Aid for Soldiers ..................................................................................................................... FM 21-11 

A-4. DA PAMPHLETS 

The Army Maintenance Management System (TAMMS) .............................................................. DA PAM 738-750 

Functional Users Manual for the Army Maintenance Management 

System-Aviation (TAMMS-A) ................................................................................................. DA PAM 738-751 

A-5. DA FORMS 

Recommended Changes to Equipment Technical Publications ...................................... .............. DA FORM 2028-2 

Equipment Inspection and Maintenance Worksheet ................................................... .................. DA FORM 2404 

A-6. STANDARD FORMS 

Quality Deficiency Report.............................................................................................................. SF 368 

Report of Discrepancies ................................................................................................................ SF 364 

A-7. OTHER 

Common Table of Allowances ......................................................................................................CTA 8-100/ 

CTA 50-970 

A-1/(A-2 blank)

APPENDIX B 


B-1. THE ARMY MAINTENANCE SYSTEM MAC. 

MAINTENANCE ALLOCATION CHART (MAC) 

Section I. INTRODUCTION 

a. This introduction (Section I) provides a general explanation of all maintenance and repair functions 

authorized at various maintenance levels under the standard Army Maintenance System concept. 

b. The Maintenance Allocation Chart (MAC) in Section II designates overall authority and responsibility for the 

performance of maintenance functions on the identified end item or component. The application of the maintenance 

functions to the end item or component will be consistent with the capacities and capabilities of the designated 

maintenance levels which are shown on the MAC in column (4) as: 

Unit - includes two subcolumns, C (operator/crew) and O (unit) maintenance. 

Direct Support - includes an F subcolumn. 

General Support - includes an H subcolumn. 

Depot - includes a D subcolumn. 

c. Section III lists the tools and test equipment (both special tools and common tool sets) required for each 

maintenance function as referenced from Section II. 

d. Section IV contains supplemental instructions and explanatory notes for a particular maintenance function. 

B-2. MAINTENANCE FUNCTIONS. 

Maintenance functions are limited to and defined as follows: 

a. Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and/or electrical 

characteristics with established standards through examination (e.g., by sight, sound, or feel). 

b. Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics 

of an item and comparing those characteristics with prescribed standards. 

c. Service. Operations required periodically to keep an item in proper operating condition; i.e., to clean (includes 

decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids or gases. 

d. Adjust. To maintain or regulate, within prescribed limits, by bringing into proper or exact position, or by setting 

the operating characteristics to specified parameters. 

e. Aline. To adjust specified variable elements of an item to bring about optimum or desired performance. 

f. Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or test, measuring, 

and diagnostic equipment used in precision measurement. Consists of comparisons of two instruments, one of which is a 

certified standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being 

compared. 

B-1

B-2. MAINTENANCE FUNCTIONS (CONT). 


g. Remove/Install. To remove and install the same item when required to perform service or other maintenance 

functions. Install may be the act of emplacing, seating, or fixing into position a spare, repair part, or module (component 

or assembly) in a manner to allow the proper functioning of an equipment or system. 

h. Replace. To remove an unserviceable item and install a serviceable counterpart in its place. "Replace" is 

authorized by the MAC and assigned maintenance level is shown as the 3rd position code of the SMR code. 

i. Repair. The application of maintenance services including fault location/troubleshooting, removal/ installation, 

and disassembly/assembly procedures, and maintenance actions to identify troubles and restore serviceability to an item 

by correcting specific damage, fault, malfunction, or failure in a part, subassembly, module (component or assembly), 

end item, or system. 

j. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely 

serviceable/operational condition as required by maintenance standards in appropriate technical publications (i.e., 

DMWR). Overhaul is normally the highest degree of maintenance performed by the Army. Overhaul does not normally 

return an item to like new condition. 

k. Rebuild. Consists of those services/actions necessary for the restoration of unserviceable equipment to a like 

new condition in accordance with original manufacturing standards. Rebuild is the highest degree of materiel 

maintenance applied to Army equipment. The rebuild operation includes the act of returning to zero those age 

measurements (e.g., hours/miles) considered in classifying Army equipment/components. 

B-3. EXPLANATION OF COLUMNS IN THE MAC, SECTION II. 

a. Column (1), Group Number. Column (1) lists functional group code numbers, the purpose of which is to 

identify maintenance significant components, assemblies, subassemblies, and modules with the next higher assembly. 

b. Column (2), Component/Assembly. Column (2) contains the item names of components, assemblies, 

subassemblies, and modules for which maintenance is authorized. 

c. Column (3), Maintenance Function. Column (3) lists the functions to be performed on the item listed in column 

(2). 

d. Column (4), Maintenance Level. Column (4) specifies each level of maintenance authorized to perform each 

function listed in column (3), by indicating work time required (expressed as man-hours in whole hours or decimals) in the 

appropriate subcolumn. This work-time figure represents the active time required to perform that maintenance function 

at the indicated level of maintenance. If the number or complexity of the tasks within the listed maintenance function 

vary at different maintenance levels, appropriate work-time figures are to be shown for each level. The work time figure 

represents the average time required to restore an item (assembly, subassembly, component, module, end item, or 

system) to a serviceable condition under typical field operating conditions. This time includes preparation time (including 

any necessary disassembly/assembly time), troubleshooting/fault location time, and quality assurance time in addition to 

the time required to perform the specific tasks identified for the maintenance functions authorized in the maintenance 

allocation chart. The symbol designations for the various maintenance levels are as follows: 

C. ..................... Operator or Crew 

O ..................... Unit Maintenance 

F ...................... Support Maintenance 

L ...................... Specialized Repair Activity (SRA) 

D .................... Depot Maintenance 

B-2


e. Column (5), Tools and Test Equipment Reference Code. Column (5) specifies, by code, those common tool 

sets (not individual tools), common TMDE, and special tools, special TMDE, and special support equipment required to 

perform the designated function. Codes are keyed to tools and test equipment in Section III. 

f. Column (6), Remarks. When applicable, this column contains a letter code, in alphabetic order, which is keyed 

to the remarks contained in Section IV. 

B-4. EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT REQUIREMENTS, SECTION III. 

a. Column (1), Reference Code. The tool and test equipment reference code correlates with a code used in the 

MAC, Section II, Column 5. 

b. Column (2), Maintenance Level. The lowest level of maintenance authorized to use the tool or test equipment. 

c. Column (3), Nomenclature. Name or identification of the tool or test equipment. 

d. Column (4), National Stock Number. The National stock number of the tool or test equipment. 

e. Column (5), Tool Number. The manufacturer's part number model number or type number. 

B-5. EXPLANATION OF COLUMNS IN REMARKS, SECTION IV. 

a. Column (1), Reference Code. The code recorded in column 6, Section II. 

b. Column (2), Remarks. This column lists information pertinent to the maintenance function being performed as 

indicated in the MAC, Section II. 

B-3

Section II. MAINTENANCE ALLOCATION CHART 

FOR 

M20A1 SIMPLIFIED COLLECTIVE PROTECTION EQUIPMENT 


(1) (2) (3) (4) (5) (6) 

MAINTENANCE LEVEL 

DIRECT GENERAL 

GROUP COMPONENT/ MAINTENANCE UNIT SUPPORT SUPPORTDEPOT TOOLS AND 

NUMBER ASSEMBLY FUNCTION C O F H D EQUIPMENT REMARKS 

00 M20A1 NBC Inspect 0.2 

Simplified Repair 0.2 

Collective 

Protection 

Equipment 

REF CODE 

01 Room Simplified Inspect 0.2 0.2 

Collective Replace 0.2 

Protection Repair 0.2 0.2 A 

Equipment Liner 

Package 

02 Pressurized Inspect 0.2 0.2 

Protective Replace 0.3 

Entrance Repair 0.3 1 A 

0201 Pressurized Repair 0.1 0.2 1 A 

Protective 

Entrance Liner 

Assembly 

020101 Dome Light Inspect 0.1 0.1 

Repair 0.2 1 

03 Recirculation Inspect 0.1 0.1 

Filter Replace 0.1 

Repair 0.2 1 

04 Accessory Inspect 0.1 0.1 

Package Repair 0.1 

0401 Short Air Duct Inspect 0.1 0.1 

Hose Assembly Repair 0.1 0.2 1 A 

040101 Straight Flange Inspect 0.1 0.1 

Adapter Replace 0.1 1 

Repair 0.1 1 

040102 Air Duct Hose Inspect 0.1 0.1 


Repair 0.1 1 

0402 Long Air Duct Inspect 0.1 0.1 

Hose Assembly Repair 0.1 0.2 1 A 

040201 Air Duct Hose Inspect 0.1 0.1 


Repair 0.1 1 

0403 Extension Light Inspect 0.1 0.1 

Assembly Repair 0.1 

0404 Motor Blower Inspect 0.1 0.1 

Assembly Replace 0.1 

Repair 0.5 1 

B-4


Section III. TOOLS AND TEST EQUIPMENT REQUIREMENTS 

FOR 


(1) (2) (3) (4) (5) 

TOOL OR TEST 

NATIONAL 

EQUIPMENT MAINTENANCE STOCK TOOL 

REF CODE LEVEL NOMENCLATURE NUMBER NUMBER 

1 O Tool Kit, General 5180-00-177-7033 SC5180-90-N26 

Mechanics, Automotive 

Section IV. REMARKS 

FOR 


(1) (2) 

REMARKS 

CODE 

REMARKS 

A 

Crew level can restore liners, pressurized protective entrance fabric, and air 

duct hose assemblies to operating condition by using pressure sensitive 

adhesive tape. 

B-5/(B-6 blank)


APPENDIX C 

DIRECT SUPPORT MAINTENANCE 

REPAIR PARTS AND SPECIAL TOOLS LIST 

Current as of 1 December 1995 

SECTION I. INTRODUCTION 

C-1. SCOPE. 

This RPSTL lists and authorizes spares and repair parts; special tools; special test, measurement, and diagnostic 

equipment (TMDE), and other special support equipment required for performance of Unit maintenance of the M20Al 

Simplified Collective Protection Equipment. It authorizes the requisitioning, issue, and disposition of spares, repair parts 

and special tools as indicated by the source, maintenance and recoverability (SMR) codes. 

C-2. GENERAL. 

This Repair Parts and Special Tools List is divided into the following sections: 

a. Section II. Repair Parts List. A list of spares and repair parts authorized by this RPSTL for use in the 

performance of maintenance. The list also includes parts which must be removed for replacement of the authorized 

parts. Parts lists are composed of functional groups in ascending alphanumeric sequence, with the parts in each group 

listed in ascending figure and item number sequence. Bulk materials are listed by item name in FIG. BULK at the end of 

the Section. Repair parts kits are listed separately in their own functional group within Section II. Repair parts for 

reparable special tools are also listed in this section. Items listed are shown on the associated illustration. 

b. Section III. Special Tools List. A list of special tools, special TMDE, and other special support equipment 

authorized by this RPSTL (as indicated by Basis of Issue (BOI) information in the DESCRIPTION AND USABLE ON 

CODE (UOC) column). 

c. Section IV. Cross-reference Index. There are two cross-reference indexes in this RPSTL: the National Stock 

Number (NSN) index which lists NSNs appearing in the listings, followed by a separate list in alphanumeric sequence of 

all part numbers appearing in the listings. National stock numbers and part numbers are cross-referenced to each 

illustration figure and item number appearance. The figure and item number index lists figure and item numbers in 

alphanumeric sequence and cross-references NSN, CAGEC and part numbers. 

C-3. EXPLANATION OF COLUMNS (Sections II). 

a. ITEM NO. (Column (2)). Indicates the number used to identify items called out in the illustration. 

C-1


C-3. EXPLANATION OF COLUMNS (Section II). 

b. SMR CODIE (Column (2)), The Source, Maintenance, and Recoverability (SMR) code is a 5-position code 

containing supply, requisitioning information, maintenance level authorization criteria, and disposition instruction, as 

shown in the following breakout. 

Source 

Code 

Maintenance 

Code 

Recoverability 

Code 

XX 1 st two 

XX X 

positions 

How you get an item. 3d position 4th position 

Who can install, 

replace or use 

the item. 

Who can do 

complete 

Repair (see 

note) on the 

item. 

Who determines 

disposition action 

on an unserviceable 

the item. 

* Complete Repair: Maintenance capacity, capability, and authority to perform all corrective maintenance tasks of the 

"Repair" function in a use/user environment in order to restore serviceability to a failed item. 

(1) Source Code. The source code tells you how you get an item needed for maintenance, repair, or overhaul of 

an end item/equipment. Explanations of source codes follow. 

Code 

PA 

PB 

PC** 

PD 

PE 

PF 

PG 

KD 

KF 

KB 

MO (Made at 

AVUM LEVEL) 

MF (Made at DS/ 

AVUM level) 

MH (Made at GS 

level) 

ML (Made at Speci 

alized Repair 

ACT(SRA)) 

Explanation 

Stocked items; use the applicable NSN to request/requisition items with these 

source codes. They are authorized to the category indicated by the code 

entered in the 3rd position of the SMR code. 

**NOTE: Items coded PC are subject to deterioration. 

Items with these codes are not to be requested/requisitioned individually. They 

are part of a kit which is authorized to the maintenance category indicated in 

the 3rd position of the SMR code. The complete kit must be requisitioned and 

applied. 

Items with these codes are not to be requested/requisitioned 

individually. They must be made from bulk material which is 

identified by the part number in the DESCRIPTION and USABLE 

ON CODE (UOC) column and listed in the Bulk Material group of the 

repair parts list in the RPSTL. If the item is authorized to you by the 

3rd position code of the SMR code, but the source code indicates it 

Activity (SRA))is made at a higher level, order the item from the higher level of 

MD (Made at Depot)maintenance. 

C-2


AO (Assembled by org 

AVUM 

Level) 

AF (Assembled by 

DS/AVUM 

Level) 

AH (Assembled by GS 

Category) 

AL (Assembled by SRA) 

AD (Assembled by Depot) 

Items with these codes are not to be requested/requisitioned 

individually. The parts that make up the assembled item must be 

requisitioned or fabricated and assembled at the level of 

maintenance indicated by the source code. If the 3rd position code 

of the SMR code authorizes you to replace the item, but the 

source code indicates the items are assembled at a higher level, 

order the item from the higher level of maintenance. 

XA - - Do not requisition an "XA"-coded item. Order its next higher assembly. (Also, refer to the NOTE below.) 

XB - - If an "XB" item is not available from salvage, order it using the FSCM and part number given. 

XC - - Installation drawing, diagram, instruction sheet, field service drawing, that is identified by manufacturer's part 

number. 

XD - - Item is not stocked. Order an "XD"-coded item through normal supply channels using the FSCM and part number 

given, if no NSN is available. 

NOTE: Cannibalization or controlled exchange, when authorized, may be used as a source of supply for items 

with the above source codes, except for those source coded "XA" or those aircraft support items restricted by 

requirements of AR 750-1 

(2) Maintenance Code. Maintenance codes tells you the level(s) of maintenance authorized to USE and 

REPAIR support items. The maintenance codes are entered in the third and fourth positions of the SMR code as follows: 

(a) The maintenance code entered in the third position tells you the lowest maintenance level 

authorized to remove, replace, and use an item. The maintenance code entered in the third position 

will indicate authorization to the following levels of maintenance. 

Code 

Application/Explanation 

C - Crew or operator maintenance done within the organization or aviation unit maintenance. 

O - Organizational or aviation unit category can remove, replace, and use the item. 

F - Direct support or aviation intermediate level can remove, replace, and use the item. 

H - General support level can remove, replace, and use the item. 

L - Specialized repair activity can remove, replace, and use the item. 

D - Depot level can remove, replace, and use the item. 

(b) The maintenance code entered in the fourth position tells whether or not the item is to be 

repaired and identifies the lowest maintenance level with the capability to do complete repair (i.e., perform all authorized 

repair functions). NOTE: Some limited repair may be done on the item at a lower level of maintenance, if authorized by 

the Maintenance Allocation Chart (MAC) and SMR codes. This position will contain one of the following maintenance 

codes. 

Code 


O - Organizational or (aviation unit) is the lowest level that can do complete repair of the item. 

C-3


F 

H 

L 

D 

Z 

B 

-Direct support or Aviation Intermediate is the lowest level that can do complete repair of the item. 

-General support is the lowest level that can do complete repair of the item. 

-Specialized repair activity (designate the specialized repair activity) is the lowest level that can do 

complete repair of the item. 

-Depot is the lowest level that can do complete repair of the item. 

-Nonreparable. No repair is authorized. 

-No repair is authorized. (No parts or special tools are authorized for the maintenance of a "B" coded 

item). However, the item may by reconditioned by adjusting, lubricating, etc., at the user level. 

(3) Recoverability Code. Recoverability codes are assigned to items to indicate the disposition action on 

unserviceable items. The recoverability code is entered in the fifth position of the SMR Code as follows: 

Recoverability 

Codes 

Z 

O 

F 

H 

D 

L 

A 


-Nonreparable item. When unserviceable, condemn and dispose of the item at the level of maintenance 

shown in 3d position of SMR Code. 

-Reparable item. When uneconomically reparable, condemn and dispose of the item at Unit or Aviation 

Unit level. 

-Reparable item. When uneconomically reparable, condemn and dispose of the item at the Direct 

support or Aviation Intermediate level. 

-Reparable item. When uneconomically reparable, condemn and dispose of the item at the General 

support level. 

-Reparable item. When beyond lower level repair capability, return to depot. Condemnation and disposal 

of item not authorized below Depot level. 

-Reparable item. Condemnation and disposal not authorized below Specialized Repair Activity (S RA). 

-Item requires special handling or condemnation procedures because of specific reasons (e.g., precious 

metal content, high dollar value, critical material, or manuals/directives for specific instructions. 

c. CAGEC (Column (3)). The Commercial and Government Entity Code (CAGEC) is a 5-digit numeric code 

which is used to identify the manufacturer, distributor, or Government agency, etc., that supplies the item. 

d. PART NUMBER (Column (4)). Indicates the primary number used by the manufacturer (individual, company, 

irm, corporation, or Government activity), which controls the design and characteristics of the item by means of its 

engineering drawings, specifications standards, and inspection requirements to identify an item or range of items. 

NOTE: When you use a NSN to requisition an item, the item you receive may have a different part number from 

the part ordered. 

C-4


e. DESCRIPTION AND USABLE ON CODE (UOC) (Column (5)). This column includes the following 

information: 

(1) The Federal item name and, when required, a minimum description to identify the item. 

(2) Part numbers for bulk materials are referenced in this column in the line item entry for the item to be 

manufactured/fabricated. 

(3) The statement "END OF FIGURE" appears just below the last item description in Column 5 for a given figure in 

both Section II and Section III. 

(4) Items that are included in kits and sets are listed below the name of the kit or set. 

f. QTY (Column (6)). The QTY (quantity per figure column) indicates the quantity of the item used in the 

breakout shown on the illustration figure, which is prepared for a functional group, subfunctional group, or an assembly. 

A "V" appearing in this column in lieu of a quantity indicates that the quantity is variable and the quantity may vary from 

application to application. 

C-4. EXPLANATION OF COLUMNS (Section IV). 

a. NATIONAL STOCK NUMBER (NSN) INDEX. 

(1) STOCK NUMBER column. This column lists the NSN by National Item Identification Number (NIIN) 

sequence. The NIIN consists of the last nine digits of the NSN. When using this column to locate an item, ignore the 

first 4 digits of the NSN. However, the complete NSN should be used when ordering items by stock number. Refer to 

the following example: 

NSN 

5305-01-674-1467 

NIIN 

(2) FIG. column. This column lists the number of the figure where the item is identified/located. The 

figures are in numerical order in Section II and III. 

(3) ITEM column. The item number identifies the item associated with the figure listed in the adjacent FIG. 

column. This item is also identified by the NSN listed on the same line. 

b. PART NUMBER INDEX. Part numbers in this index are listed by part number in ascending alphanumeric 

sequence (i.e., vertical arrangement of letter and number combination which places the first letter or digit of each group 

in order A through Z, followed by the numbers 0 through 9 and each following letter or digit in like order). 

(1) CAGEC column. The Commercial and Government Entity Code (CAGEC) is a 5-digit numeric code 

used to identify the manufacturer, distributor, or Government agency, etc., that supplies the item. 

(2) PART NUMBER column. Indicates the primary number used by the manufacturer (individual, firm, 

corporation, or Government activity), which controls the design and characteristics of the item by means of its 

engineering drawings, specifications standards, and inspection requirements to identify an item or range of items. 

(3) S TOCK NUMBER column. This column lists the NSN for the associated part number and manufacturer 

identified in the PART NUMBER and CAGEC columns to the left. 

II and III. 

(4) FIG. column. This column lists the number of the figure where the item is identified/located in Section 

C-5


(5) ITEM column. The item number is that number assigned to the item as it appears in the figure 

referenced in the adjacent figure number column. 

c. FIGURE AND ITEM NUMBER INDEX. 

and III. 

(1) FIG. column. This column lists the number of the figure where the item is identified/located in Section II 

(2) ITEM column. The item number is that number assigned to the item as it appears in the figure 

referenced in the adjacent figure number column. 

(3) STOCK NUMBER column. This column lists the NSN for the item. 

(4) CAGEC column. The Commercial and Government Entity Code (CAGEC) is a 5-digit numeric 

code used to identify the manufacturer, distributor, or Government agency, etc., that supplies the item. 

(5) PART NUMBER column. Indicates the primary number used by the manufacturer (individual, firm, 

corporation, or Government activity), which controls the design and characteristics of the item by means of its 

engineering drawings, specification standards, and inspection requirements to identify an item or range of items. 

C-5. SPECIAL INFORMATION. 

a. FABRICATION INSTRUCTIONS. Bulk materials required to manufacture items are listed in the Bulk 

Material Functional Group of this RPSTL. Part numbers for bulk materials are also referenced in the description column 

of the line item entry for item to be manufactured/fabricated. Detailed fabrication instructions for items source coded to 

be manufactured or fabricated are found in TM 3-4240-313-20&P. 

b. ASSEMBLY INSTRUCTION. Detailed assembly instructions for items source coded to be assembled from 

component spare/repair parts are found in TM 3-4240-313-20&P. Items that make up the assembly are listed 

immediately following the assembly item entry or reference is made to an applicable figure. 

C-6. HOW TO LOCATE REPAIR PARTS. 

a. When National Stock Number or Part Number is Not Known. 

(1) First. Using the table of contents, determine the functional group or subfunctional group to which the 

item belongs. This is necessary since figures are prepared for functional groups and subfunctional groups, and listings 

are divided into the same groups. 

(2) Second. Find the figure covering the functional group or subfunctional group to which the item belongs. 

(3) Third. Identify the item on the figure and use the Figure and Item Number Index to find the NSN. 

b. When National Stock Number or Part Number is Known. 

(1) First. Using the National Stock Number or the Part Number Index, find the pertinent National Stock 

Number or Part Number. The NSN index is in National Item Identification Number (NIIN) sequence (see 4.a). The part 

numbers in the Part Number Index are listed in ascending alphanumeric sequence (see 4.b). Both indexes crossreference 

you to the illustration/figure and item number of the item you are looking for. 

(2) Second. Turn to the figure and item number, verify that the item is the one you're looking for, then 

locate the item number in the repair parts list for the figure. 

C-6

C-7. ABBREVIATIONS. 


Abbreviation 

Explanation 

P. E. Protective Entrance 

C-7


Section II. REPAIR PARTS LIST 

Figure C-1. M20A1 Simplified Collective Protection Equipment

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 

NO CODE CAGEC NUMBER DESCRIPTION AND USABLE ON CODES (UOC) QTY 

GROUP 00: M20A1 NBC SIMPLIFIED 

COLLECTIVE PROTECTION EQUIPMENT 

FIG. C-1. M20A1 NBC SIMPLIFIED 


5-19-11320 

I PACOO 81361 5-19-11334 LINER PACKAGE, SIMPL (SEE FIG. C-2 FOR ..........1 

BREAKDOWN) 

2 PAOOO 81361 5-19-11021 ENTRANCE, PROTECTIVE (SEE FIG. C-3 FOR ..........1 

BREAKDOWN) 

3 AOOOO 81361 5-19-11190 ACCESSORY PACKAGE (SEE FIG. C-7 FOR ..........1 

BREAKDOWN) 

4 PAOOO 81361 5-19-10878 FILTER, RECIRCULATIO (SEE FIGURE C-6 FOR ..........1 

BREAKDOWN) 

5 PAOZA 81361 5-19-6868 FILTER, GAS-PARTICUL ..........1 

END OF FIGURE 

C-1-1

Section II 


Figure C-2. Room Simplified Collective Protection Equipment Liner Package

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 


GROUP 01: ROOM SIMPLIFIED 


LINER PACKAGE 

FIG. C-2. ROOM SIMPLIFIED 


LINER PACKAGE 

5-19-11334 

1 XAOZZ 81361 5-19-11210 LINER, ROOM, NBC ................................................................1 

2 PAOZZ 81361 5-19-11341 AIRLOCK ADAPTER ASS ........................................................1 

3 PAOZZ 81361 5-19-11062-40 BAG, CARRIER, CHEMICAL ....................................................1 

END OF FIGURE 

C-2-1

Section II 


Figure C-3. Pressurized Protective Entrance

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 


GROUP 02: PRESSURIZED 

PROTECTIVE ENTRANCE 

FIG. C-3. PRESSURIZED 

PROTECTIVE ENTRANCE 

5-19-11021 

1 XAOOO 81361 5-19-11022 LINER ASSEMBLY (SEE FIG. C-4 FOR BREAKDOWN) ..... 

END OF FIGURE 

C-3-1

Section II 


Figure C-4. Protective Entrance Liner Package

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 


GROUP 0201: PRESSURIZED 

PROTECTIVE ENTRANCE LINER PACKAGE 

FIG. C-4. PRESSURIZED 

PROTECTIVE ENTRANCE LINER PACKAGE 

5-19-11022 

1 PAOOO 96906 MS25358-8 LIGHT, DOME ............................................................... 

2 PAOZZ 81348 W-L-00111/12 LAMP, INCANDESCENT ............................................... 2 

3 PAOZZ 96906 MS51957-30 SCREW, MACHINE ....................................................... 6 

4 PAOZZ 96906 MS35338-136 WASHER, LOCK ........................................................... 6 

5 PAOZZ 96906 MS15795-806 WASHER, FLAT ............................................................ 6 

6 XDOZZ 81361 5-19-8021 BRACKET ..................................................................... 2 

7 PBOZZ 81361 5-19-8237 GAGE, DIFFERENTIAL ................................................. 2 

8 MOOZZ 81361 NPN 1 TUBING, MAKE FROM TUBING, PN LT 790 ................. 2 

9 PAOZZ 85274 A339 ADAPTER, STRAIGHT PI .............................................. 2 

10 PAOZZ 96906 MS15795-815 WASHER, FLAT ............................................................ 4 

11 PAOZZ 81348 WW-P-471 CQQ LOCKNUT ..................................................................... 2 

BCA 

12 PAOZZ 81361 5-19-8038 TIMER, INTERVAL......................................................... 

13 PAOZZ 79919 K35B1 KNOB ............................................................................ 

14 PAOZZ 79919 Z113A NUT, STAMPED ............................................................ 

15 XDOZZ 79919 D549 FACE PLATE ................................................................ 

16 XAOZZ 81361 NPN 3 P.E.LINER SOFTGOODS .............................................. 

END OF FIGURE 

C-4-1

Section II 


Figure C-5. Dome Light

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 


GROUP 020101: DOME LIGHT 

FIG. C-5. DOME LIGHT 

MS25358-8 

1 XAOZZ 81361 NPN HOUSING, LIGHT....................................................... 1 

2 PAOZZ 96906 MS25358-6 GASKET ................................................. ................. 1 

3 PAOZZ 96906 MS25358-4 LENS, LIGHT ............................................................. 1 

4 PAOZZ 96906 MS25358-5 RETAINER, LENS ...................................................... 6 

5 PAOZZ 96906 MS35206-215 SCREW, MACHINE ................................................... 6 

END OF FIGURE 

C-5-1

Section II 


Figure C-6. Recirculation Filter

SECTION II 

TM3-4240-313-20&P 

(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 

NO CODE CAGEC NUMBER DESCRIPTION AND USABLE ON CODES(UOC) QTY 

GROUP 03: RECIRCULATION FILTER 

FIG. C-6. RECIRCULATION FILTER 

5-19-10878 

1 XDOZZ 81361 5-19-11412 COVER, ACCESS, TOP ....................................................... 1 

2 PAOZZ 81361 5-19-11232 FILTER, ELEMENT, GAS .................................................... 1 

3 XAOZZ 81361 NPN 4 HOUSING AND BLOWER .................................................... 4 

4 PAOZZ 96906 MS51957-46 SCREW, MACHINE ............................................................. 4 

5 PAOZZ 96906 MS15795-845 WASHER, FLAT .................................................................. 4 

6 PAOZZ 96906 MS35338-137 WASHER, LOCK ................................................................. 4 

7 PAOZZ 96906 MS35649-284 NUT, PLAIN, HEXAGON ..................................................... 4 

8 PAOZZ 81361 5-19-11607 GUARD, FAN IMPELLER .................................................... 1 

9 PBOZZ 81361 5-19-10885 COVER, ACCESS, BOTTOM ..... ......................................... 1 


11 XDOZZ 98437 SS330-2 SCREW, MACHINE ............................................................. 3 

12 PAOZZ 63562 N-1233-4 IMPELLER, FAN, AXIAL....................................................... 1 

END OF FIGURE 

C-6-1

Section II 


Figure C-7. Accessory Package

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 

NO CODE FSCM NUMBER DESCRIPTION AND USABLE ON CODES(UOC) QTY 

GROUP 04: ACCESSORY PACKAGE 

FIG. C-7. ACCESSORY PACKAGE 

5-19-11190 

1 PBOOO 81361 5-19-10872 MOTOR BLOWER ASSEMB (SEE FIG. C-12 FOR ............. 1I 

BREAKDOWN) 

2 PAOZZ 81361 5-19-11399 ACCESSORY CASE, CBE ................................................... 1 

3 AOOOO 81361 5-19-11443 HOSE ASSEMBLY, AIR DUCT (SEE FIG. C-8 FOR ........... 1 

BREAKDOWN) 

4 PBOZZ 81361 5-19-10928 CABLE ASSEMBLY, SPEC (220 VAC) ................................ 1 

5 PCOZZ 81361 5-19-8144 GASKET .............................................................................. 6 

5A PCOZZ 81361 5-19-8092 GASKET .............................................................................. 3 

6 PCCZZ 86984 PPP-T-60 TY4 TAPE, PRESSURE SENSI .................................................. 1 

CLI 

7 PAOZZ 81361 5-19-11349 FABRIC, CB PROTECTIO ................................................... 1 

8 PBOZZ 81361 5-19-10927 CABLE ASSEMBLY, SPEC(110 VAC) ................................. 1 

9 AOOOO 81361 5-19-8158 LIGHT ASSEMBLY, EXTENSION (SEE FIG. C-11 .............. 1 

FOR BREAKDOWN) 

10 PAOZZ 81361 5-19-10925 CABLE ASSEMBLY, POWE ................................................ 1 

11 AOOOO 81361 5-19-11444 HOSE ASSEMBLY, AIR DUCT (SEE FIG. C-10 ................. 1 

FOR BREAKDOWN) 

END OF FIGURE 

C-7-1

Section II 


Figure C-8 Short Air Duct Hose Assembly

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 


GROUP 0401: SHORT AIR 

DUCT HOSE ASSEMBLY 

FIG. C-8. SHORT AIR 

DUCT HOSE ASSEMBLY 

5-19-11443 

1 PBOZZ 81361 5-19-8051 ADAPTER, STRAIGHT, FL .................................................. 1 

2 PAOZZ 96906 MS35842-15 CLAMP, HOSE ...... .............................................................. 2 

3 PAOZZ 81361 5-19-11093-1 HOSE, AIR DUCT ................................................................ 1 

4 PBOZZ 81361 5-19-8139-110 ADAPTER, HOSE, AIR DU .................................................. 1 

END OF FIGURE 

C-8-1

Section II 


Figure C-9. Air Duct Hose Adapters

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 


GROUP 040101 AND 040102: 

STRAIGHT FLANGE ADAPTER; AND; 

AIR DUCT HOSE ADAPTER 

FIG. C-9. STRAIGHT FLANGE ADAPTER; 

AND; AIR DUCT HOSE ADAPTER 

5-19-8051 AND 5-19-8139-110 

1 XAOZZ 81361 NPN 2 ADAPTER, END-PIECE ....................................................... 1 

2 PCOZZ 81361 5-19-8092 GASKET .............................................................................. 1 

3 XAOZZ 81361 NPN 10 ADAPTER, END-PIECE ....................................................... 1 

4 PCOZZ 81361 5-19-8144 GASKET .............................................................................. 1 

END OF FIGURE 

C-9-1

Section II 


Figure C-10. Long Air Duct Hose Assembly, and Air Duct Hose Adapter

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 


GROUP 0402 AND 040201: LONG 

AIR DUCT HOSE ASSEMBLY; AND; 

AIR DUCT HOSE ADAPTER 

FIG. C-10. LONG AIR DUCT 

HOSE ASSEMBLY; AND; AIR 

DUCT HOSE ADAPTER 

5-19-11444 AND 5-19-8139-100 

1 PBOOO 81361 5-19-8139-100 ADAPTER, HOSE, AIRDU ................................................... 1 

2 PCOZZ 81361 5-19-8144 .GASKET.............................................................................. 1 

3 XAOZZ 81361 NPN 12 ADAPTER, END-PIECE........................................................ 1 

4 PAOZZ 96906 MS35842-15 CLAMP, HOSE ................................................................... 1 

5 PAOZZ 81361 5-19-11093-2 HOSE, AIR DUCT ................................................................ 1 

END OF FIGURE 

C-10-1

Section II 


Figure C-11. Extension Light

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 


GROUP 0403: EXTENSION LIGHT ASSEMBLY 

FIG. C-11. EXTENSION LIGHT ASSEMBLY 

5-19-8158 

1 PAOZZ 79409 118A163 LIGHT, EXTENSION ............................................................ 1 

2 PAOZZ 81348 WL101-77T LAMP, INCANDESCENT ..................................................... 1 

END OF FIGURE 

C-11-1

Section II 


Figure C-12. Motor Blower Assembly

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 


GROUP 0404: MOTOR BLOWER ASSEMBLY 

FIG. C-12. MOTOR BLOWER ASSEMBLY 

5-19-10872 

1 PBOZZ 81361 5-19-10876 COVER, ACCESS ............................................................... 1 

2 KFOZZ 81361 5-19-8258 AIR FILTER ......................................................................... 1 

3 PAOZZ 96906 MS24693-C76 SCREW, MACHINE.............................................................. 20 



6 MOOZZ 81361 5-19-10951-2 GASKET, 12.25 IN MAKE FROM GASKET .......................... 2 

MATERIAL, CONDUCTIVE, PN 8812247 

7 PAOZZ 96906 MS17830-3C NUT, SELF-LOCKING, HE .................................................. 4 

8 KFOZZ 81349 M3971/2-5 METER, TIME ..................................................................... 1 



11 XAOZZ 81361 NPN 5 HOUSING, MOTOR BLOWE................................................ 1 

12 PBOZZ 81361 5-19-10898 SHIELD, ELECTRONIC C.......................................................... 4 



15 XDOZZ 81361 5-19-10937 BLOWER SUPPORT ........................................................... 2 

16 KFOZZ 81361 5-19-10895 GASKET .............................................................................. 4 

17 KFOZZ 81361 5-19-10873 MOTOR BLOWER ............................................................... 2 

18 MOOZZ 81361 5-19-10951-1 GASKET, 16.25 IN MAKE FROM GASKET .......................... 3 

MATERIAL, CONDUCTIVE, PN 8812247 

19 XAOZZ 81361 5-19-10890 COVER, PLATE ASSY ......................................................... 1 

20 XDOZZ 7K368 J-11729-190 MOUNT, SANDWICH .......................................................... 4 

21 PBOZZ 81361 5-19-10899 PANEL, RADIO FREQUEN ................................................. 1 







PAOZZ 81361 5-19-10950 MAINTENANCE KIT, CBR.................................................... 1 

AIR FILTER 

(I) C-11-2 

GASKET 

(4) C-11-16 

MOTOR BLOWER (2) C- 11-17 

METER, TIME TOTALIZI (1) C-11-8 

END OF FIGURE 

C-12-1

SECTION II 


(1) (2) (3) (4) (5) (6) 

ITEM SMR PART 


GROUP 99: BULK ITEMS LIST 

FIG. BULK 

1 PBOZZ 07700 8812247 GASKET MATERIAL, CON .................................................. 1 

2 PBOZZ 81348 LT790 TUBING, NONMETALLIC .................................................... 1 

END OF FIGURE 

BULK-1

Section III 


Cross-Reference Indexes 

National Stock Number Index 

Stock Number Fig. Item Stock Number Fig. Item 

5305-00-050-9228 C-6 10 5310-00-933-8119 C-6 6 

C-12 24 5310-00-933-8120 C-12 4 

5305-00-050-9233 C-12 14 5310-00-934-9759 C-6 7 

5305-00-050-9234 C-12 13 5310-00-984-7042 C-12 26 

5305-00-051-0848 C-12 27 4720-01-200-4327 C-8 4 

5305-00-054-5651 C-12 9 4720-01-200-4328 C-10 1 

5305-00-054-6654 C-4 3 6685-01-204-2721 C-4 7 

5305-00-054-6671 C-6 4 5310-01-211-3807 C-4 14 

7510-00-074-4969 C-7 6 4240-01-330-8885 C-7 1 




6240-00-155-7791 C-4 2 5180-01-331-2921 C-12 KIT 




6220-00-299-7136 C-4 1 4720-01-332-8513 C-8 1 

4730-00-349-9037 C-4 9 4720-01-332-8527 C-8 3 

5310-00-436-3290 C-12 7 4730-01-333-0058 C-4 11 

5310-00-480-3641 C-6 5 5999-01-333-2094 C-12 21 

6645-00-483-2926 C-4 12 5999-01-333-4193 BULK 1 

5310-00-595-6057 C-4 10 5340-01-335-0086 C-6 9 

5310-00-595-6211 C-12 10 5340-01-335-4928 C-12 1 

5310-00-619-1148 C-12 5 4720-01-337-7291 C-10 5 


5310-00-773-7618 C-12 25 5330-01-350-4593 C-7 5A 

5355-00-821-5225 C-4 13 C-9 2 

6645-00-831-6826 C-12 8 5999-01-361-6195 C-12 12 

5310-00-880-5976 C-4 5 6150-01-363-2153 C-7 8 

5305-00-889-2997 C-5 5 6150-01-363-2154 C-7 10 



C-10 4 4140-01-399-8527 C-6 8 

5310-00-929-6395 C-4 4 

C-I-1

Section III 



Part Number Index 

CAGEC Part Number Stock Number Fig. Item 

07700 8812247 5999-01-333-4193 BULK 1 

63562 N-1233-4 TBD C-6 12 

79409 118A163 6230-00-163-5135 C-11 1 

79919 D549 C-4 15 

79919 K35B1 5355-00-821-5225 C-4 13 

79919 Z113A 5310-01-211-3807 C-4 14 

7K368 J-11729-190 C-12 20 

81348 LT790 BULK 2 

81348 PPP-T-60 TY4CL1 7510-00-074-4969 C-7 6 

81348 W-L-00111/12 6240-00-155-7791 C-4 2 

81348 WL101-77T 6240-00-246-5052 C-11 2 

81348 WW-P-471CQQBCA 4730-01-333-0058 C-4 11 

81349 M3971/2-5 6645-00-831-6826 C-12 8 

81361 5-19-10872 4240-01-330-8885 C-7 1 

81361 5-19-10873 C-12 17 

81361 5-19-10876 5340-01-335-4928 C-12 1 


81361 5-19-10885 5340-01-335-0086 C-6 9 

81361 5-19-10890 C-12 19 

81361 5-19-10895 C-12 16 

81361 5-19-10898 5999-01-361-6195 C-12 12 

81361 5-19-10899 5999-01-333-2094 C-12 21 

81361 5-19-10925 6150-01-363-2154 C-7 10 

81361 5-19-10927 6150-01-363-2153 C-7 8 

81361 5-19-10928 TBD C-7 4 

81361 5-19-10937 C-12 15 

81361 5-19-10950 5180-01-331-2921 C-12 KIT 

81361 5-19-10951-1 C-12 18 

81361 5-19-10951-2 C-12 6 


81361 5-19-11022 C-3 1 

81361 5-19-11062-40 4240-01-331-0172 C-2 3 

81361 5-19-11093-1 4720-01-332-8527 C-8 3 

81361 5-19-11093-2 4720-01-337-7291 C-10 5 

81361 5-19-11190 C-1 3 

81361 5-19-11210 C-2 1 






81361 5-19-11412 C-6 1 

81361 5-19-11443 C-7 3 

81361 5-19-11444 C-7 11 

81361 5-19-11607 4140-01-399-8527 C-6 8 


81361 5-19-8021 C-4 6 

81361 5-19-8051 4720-01-332-8513 C-8 1 

81361 5-19-8092 5330-01-350-4593 C-7 5A 

81361 5-19-8092 5330-01-350-4593 C-9 2 

C-I-2

Section III 



Part Number Index 

CAGEC Part Number Stock Number Fig. Item 

81361 5-19-8139-100 4720-01-200-4328 C-10 1 

81361 5-19-8139-110 4720-01-200-4327 C-8 4 

81361 5-19-8144 TBD C-7 5 

81361 5-19-8144 TBD C-9 4 

81361 5-19-8144 TBD C-10 2 

81361 5-19-8158 C-7 9 

81361 5-19-8237 6685-01-204-2721 C-4 7 

81361 5-19-8258 C-12 2 

81361 C5-19-8038 6645-00-483-2926 C-4 12 

81361 NPN 1 C-4 8 

81361 NPN 10 C-9 3 

81361 NPN 12 C-10 3 

81361 NPN 2 C-9 1 

81361 NPN 3 C-4 16 

81361 NPN 4 C-6 3 

81361 NPN 5 C-12 11 

85274 A339 4730-00-349-9037 C-4 9 

96906 MS15765-842 5310-00-619-1148 C-12 5 

96906 MS15795-803 5310-00-595-6211 C-12 10 

96906 MS15795-806 5310-00-880-5976 C-4 5 

96906 MS15795-814 5310-00-773-7618 C-12 25 

96906 MS15795-815 5310-00-595-6057 C-4 10 

96906 MS15795-845 5310-00-480-3641 C-6 S 

96906 MS17830-3C 5310-00-436-3290 C-12 7 

96906 MS24693-C76 5305-00-900-0563 C-12 3 

C-6 1 

96906 MS25358-3 C-5 1 

96906 MS25358-4 6220-00-283-9732 C-5 3 

96906 MS25358-5 6220-00-133-7705 C-5 4 

96906 MS25358-6 5330-00-143-8571 C-5 2 

96906 MS25358-8 6220-00-299-7136 C-4 1 

96906 MS27183-13 5310-00-087-7493 C-12 23 

96906 MS27183-41 5310-00-765-3197 C-12 22 

96906 MS35206-215 5305-00-889-2997 C-5 5 

96906 MS35338-136 5310-00-929-6395 C-4 4 

96906 MS35338-137 5310-00-933-8119 C-6 6 

96906 MS35338-138 5310-00-933-8120 C-12 4 

96906 MS35338-141 5310-00-984-7042 C-12 26 

96906 MS35649-284 5310-00-934-9759 C-6 7 

96906 MS35842-15 4730-00-908-6293 C-8 2 

96906 MS35842-15 4730-00-908-6293 C-10 4 

96906 MS51957-107 5305-00-051-0848 C-12 27 

96906 MS51957-17 5305-00-054-5651 C-12 9 

96906 MS51957-30 5305-00-054-6654 C-4 3 

96906 MS51957-46 5305-00-054-6671 C-6 4 

96906 MS51957-62 5305-00-050-9228 C-6 10 

96906 MS51957-62 5305-00-050-9228 C-12 24 

96906 MS51957-67 5305-00-050-9233 C-12 14 

96906 MS51957-68 5305-00-050-9234 C-12 13 

98437 SS330-2 C-6 11 

C-I-3

Section III 



Figure and Item Index 

Fig. Item Stock Number CAGEC Part Number 

C-1 1 4240-01-331-0170 81361 5-19-11334 


C-1 3 81361 5-19-11190 



C-2 1 81361 5-19-11210 


C-2 3 4240-01-331-0172 81361 5-19-11062-40 

C-3 1 81361 5-19-11022 

C-4 1 6220-00-299-7136 96906 MS25358-8 

C-4 2 6240-00-155-7791 81348 W-L-00111/12 

C-4 3 5305-00-054-6654 96906 MS51957-30 

C-4 4 5310-00-929-6395 96906 MS35338-136 

C-4 5 5310-00-880-5976 96906 MS15795-806 

C-4 6 81361 5-19-8021 

C-4 7 6685-01-204-2721 81361 5-19-8237 

C-4 8 81361 NPN 1 

C-4 9 4730-00-349-9037 85274 A339 

C-4 10 5310-00-595-6057 96906 MS 15795-815 

C-4 11 4730-01-333-0058 81348 WW-P-471CQQBCA 

C-4 12 6645-00-483-2926 81361 C5-19-8038 

C-4 13 5355-00-821-5225 79919 K35B1 

C-4 14 5310-01-211-3807 79919 Z113A 

C-4 15 79919 D549 

C-4 16 81361 NPN 3 

C-5 1 96906 MS25358-3 

C-5 2 5330-00-143-8571 96906 MS25358-6 

C-5 3 6220-00-283-9732 96906 MS25358-4 

C-5 4 6220-00-133-7705 96906 MS25358-5 

C-5 5 5305-00-889-2997 96906 MS35206-215 

C-6 1 81361 5-19-11412 


C-6 3 81361 NPN 4 

C-6 4 5305-00-054-6671 96906 MS51957-46 

C-6 5 5310-00-480-3641 96906 MS15795-845 

C-6 6 5310-00-933-8119 96906 MS35338-137 

C-6 7 5310-00-934-9759 96906 MS35649-284 

C-6 8 4140-01-399-8527 81361 5-19-11607 

C-6 9 5340-01-335-0086 81361 5-19-10885 

C-6 10 5305-00-050-9228 96906 MS51957-62 

C-6 11 98437 SS330-2 

C-6 12 TBD 63562 N-1233-4 



C-7 3 81361 5-19-11443 

C-7 4 TBD 81361 5-19-10928 

C-7 5 TBD 81361 5-19-8144 

C-7 5A 5330-01-350-4593 81361 5-19-8092 

C-7 6 7510-00-074-4969 81348 PPP-T-60 TY4CL1 


C-I-4

Section III 



Figure and Item Index 

Fig. Item Stock Number CAGEC Part Number 

C-7 8 6150-01-363-2153 81361 5-19-10927 

C-7 9 81361 5-19-8158 

C-7 10 6150-01-363-2154 81361 5-19-10925 

C-7 11 81361 5-19-11444 

C-8 1 4720-01-332-8513 81361 5-19-8051 

C-8 2 4730-00-908-6293 96906 MS35842-15 

C-8 3 4720-01-332-8527 81361 5-19-11093-1 

C-8 4 4720-01-200-4327 81361 5-19-8139-110 

C-9 1 81361 NPN 2 

C-9 2 5330-01-350-4593 81361 5-19-8092 

C-9 3 81361 NPN 10 

C-9 4 TBD 81361 5-19-8144 

C-10 1 4720-01-200-4328 81361 5-19-8139-100 

C-10 2 TBD 81361 5-19-8144 

C-10 3 81361 NPN 12 

C-10 4 4730-00-908-6293 96906 MS35842-15 

C-10 5 4720-01-337-7291 81361 5-19-11093-2 

C-11 1 6230-00-163-5135 79409 118A163 

C-11 2 6240-00-246-5052 81348 WL101-77T 

C-12 1 5340-01-335-4928 81361 5-19-10876 

C-12 2 81361 5-19-8258 

C-12 3 5305-00-900-0563 96906 MS24693-C76 

C-12 4 5310-00-933-8120 96906 MS35338-138 

C-12 5 5310-00-619-1148 96906 MS15765-842 

C-12 6 81361 5-19-10951-2 

C-12 7 5310-00-436-3290 96906 MS17830-3C 

C-12 8 6645-00-831-6826 81349 M3971/2-5 

C-12 9 5305-00-054-5651 96906 MS51957-17 

C-12 10 5310-00-595-6211 96906 MS15795-803 

C-12 11 81361 NPN 5 

C-12 12 5999-01-361-6195 81361 5-19-10898 

C-12 13 5305-00-050-9234 96906 MS51957-68 

C-12 14 5305-00-050-9233 96906 MS51957-67 

C-12 15 81361 5-19-10937 

C-12 16 81361 5-19-10895 

C-12 17 81361 5-19-10873 

C-12 18 81361 5-19-10951-1 

C-12 19 81361 5-19-10890 

C-12 20 7K368 J-11729-190 

C-12 21 5999-01-333-2094 81361 5-19-10899 

C-12 22 5310-00-765-3197 96906 MS27183-41 

C- 12 23 5310-00-087-7493 96906 MS27183-13 

C-12 24 5305-00-050-9228 96906 MS51957-62 

C-12 25 5310-00-773-7618 96906 MS15795-814 

C-12 26 5310-00-984-7042 96906 MS35338-141 

C-12 27 5305-00-051-0848 96906 MS51957-107 

C-12 KIT 5180-01-331-2921 81361 5-19-10950 

BULK 1 5999-01-333-4193 07700 8812247 

BULK 2 81348 LT790 

C-I-5 /(C-I-6 blank)


APPENDIX D 

EXPENDABLE AND DURABLE ITEMS LIST 

Section I. INTRODUCTION 

D-1. SCOPE. 

This appendix lists expendable and durable items that you will need to operate and maintain the M20AI Simplified 

Collective Protection Equipment. This listing is for information only and is not authority to requisition the listed items. 

These items are authorized to you by CTA 50-790, Expendable/Durable Items (except medical, Class V repair parts, and 

heraldic items) or CTA 8-100, Army Medical Department Expendable/ Durable Items. 

D-2. EXPLANATION OF COLUMNS. 

a. Column (1) Item Number. This number is assigned to the entry in the listing and is referenced in the narrative 

instructions to identify the item (e.g., "Use Adhesive, item 1, App. D"). 

b. Column (2) Level. This column identifies the lowest level of maintenance that requires the listed item. 

c. Column (3) National Stock Number. This is the National Stock Number assigned to the item which you can 

use to requisition it. 

d. Column (4) Description. Indicates the item name, description, (CAGEC) and part number. This provides the 

other information you need to identify the item. 

e. Column (5) Unit of Measure (U/M). This code shows the physical measurement or count of an item, such as 

gallon (GL), each (EA), dozen (DZ), gross (GR), etc. If the unit of measure differs from the unit of issue, requisition the 

lowest unit of issue that will satisfy your requirements. 

D-1

Section II 


EXPENDABLE AND DURABLE ITEMS LIST (CONT) 

(1) (2) (3) (4) (5) 

NATIONAL 

ITEM STOCK DESCRIPTION 

NUMBER LEVEL NUMBER CAGEC AND PART NUMBER U/M 

1 C 8040-00-680-1080 ADHESIVE TU 

(73842) PLIOBOND 20 

2 C 6510-01-091-8200 ALCOHOL: PAD, ISOPROPYL EA 

width x 1.75 in. length 

(24065) MA-24-80 

3 C 8105-01-142-9345 BAG, SAND: plastic, polypropylene, single wall EA 

(81349) MIL-B-52472 

4 C 4230-01-101-3984 DECONTAMINATING KIT: EA 

M258A1 

(81361) 5-77-2366 

5 C 6665-01-133-4964 DETECTOR KIT: M256A1 EA 

(81361) D5-77-2240 

6 C 5120-00-900-6110 HAMMER, HAND: E22, EA 

carpenter's 

(81348) GGG-H-86 

7 C 5110-00-162-2205 KNIFE, POCKET EA 

(81349) MIL-K-818C 

8 C 8340-00-252-2297 LINE, TENT FT 

(81349) MIL-L-1709 Class A 

9 C 5510-00-272-9060 LUMBER, SOFTWOOD, BOARD: BF 

30 ft., I in. thick by 3 in. wide by 6 ft. random length 

10 C 5315-00-753-3883 NAIL: 3 in. length, 5 lb LB 

(81348) FF-N-105 

11 C 7920-00-205-1711 RAG, WIPING: 50 lb. BE 

(58536) A-A-531 

12 C 5120-00-542-3438 SCREWDRIVER, CROSS TIP EA 

(81348) GGG-S-121 

13 C 7510-01-266-0326 TAPE, PRESSURE SENSITIVE RO 

(81348) PPP-T-60 TY4CLI 

D-2

TM 34240-313-20&P 

APPENDIX E 

ILLUSTRATED LIST OF MANUFACTURED ITEMS 

E-1. INTRODUCTION. 

a. This appendix includes complete instructions for making each item authorized to be manufactured or fabricated 

at unit maintenance (i.e., all MO source coded items). 

b. A part number index in alphanumeric order is provided for cross-referencing the part number of the item to be 

manufactured to the figure which covers fabrication criteria. 

c. All bulk materials needed for manufacture of the item will be listed by part number or specification number on 

the illustration. 

INDEX 

ITEM 

FIGURE 

Gasket, 16.25 Inch, PN 5-19-10951-1 

E-l 

Gasket, 12.25 Inch, PN 5-19-10951-2 E-2 

PE Gage Tubing, 6 Inch E-3 

PE Gage Tubing, 15 Inch E-4 

E-1


NOTE: FABRICATE FROM CONDUCTIVE GASKETING MATERIAL PN 88122247. 

Figure E-1. Gasket, 16.25 Inch, PN 5-19-10951-1 

NOTE: FABRICATE FROM CONDUCTIVE GASKETING MATERIAL PN 88122247. 

Figure E-2. Gasket, 12.25 Inch, PN 5-19-10951-2 

E-2

TM 3- 4240-313-20&P 

NOTE: FABRICATE FROM TUBING PN L-T-790, NSN 4720-00-466-6780. 

Figure E-3. PE Gage Tubing, 6 Inch 

NOTE: FABRICATE FROM TUBING PN L-T-790, NSN 4720-00-466-6780. 

Figure E-4. PE Gage Tubing, 15 Inch 

E-3 /(E-4 blank)


INDEX 

Subject 

Page 

Abbreviations ........................................................................................................................................... 1-3 

Accessory Case, Description .................................................................................................................... 1-7 

Accessory Package 

Description ................................................................................ ..................................................... 1-7 

Functional Description ................................................................................ .................................... 1-7 

Inspection, PMCS ........................................................................................................................... 2-7 

Service Upon Receipt ..................................................................................................................... 2-1 

Adapter Cables 

Description ..................................................................................................................................... 1-7 

Air Duct 

Hose Adapter Gasket Replacement ................................................................................ ................ 2-28 

Hose, Clamp, and Adapter Replacement ........................................ ................................................ 2-27 


Repair ............................................................................................................................................. 2-27 

Bell Timer (see Interval Timer) 

Blower (see Motor Blower) 

Cables (see Power Cables) 

Characteristics, Capabilities, and Features, Equipment ................................................................................ 1-3 

Checking Unpacked Equipment ............................................................................................................... 2-2 

Common Tools and Equipment ................................................................................................................ 2-1 

Corrosion Data Feedback ......................................................................................................................... 1-1 

Destruction of Army Material to Prevent Enemy Use ................................................................................ 1-1 

Differences Between Models .................................................................................................................... 1-8 

Differential Pressure Gage (see Gage) 

Dimensions and Weights .......................................................................................................................... 1-8 

Dome Light .............................................................................................................................................. 1-9 

Functional Description .................................................................................................................... 1-9 


Lamp Replacement ........................................................................................................................ 2-9 

Repair ............................................................................................................................................. 2-24 

Troubleshooting .............................................................................................................................. 2-16 

ECU Adapter 

Description ..................................................................................................................................... 1-3 

Electronic Components Shield, Motor Blower, Replacement .................................................................... 2-41 

A 

B 

C 

D 

E 

Index-1


INDEX 

Subject 

Page 

E (Cont.) 

Equipment Characteristics, Capabilities, and Features ............................................................................. 1-3 

Equipment Data ....................................................................................................................................... 1-8 

Equipment Improvement Recommendations, Reporting ............................................................................... 1-2 

Expendable/Durable Supplies and Materials List, Appendix D................................................................... D-1 

Extension Light 

Description ..................................................................................................................................... 1-7 


Lamp Replacement ........................................................................................................................ 2-29 

Features, Capabilities, Characteristics, Equipment ................................................................................... 1-3 

Filters (see Recirculation Filter; HSFC) 

Forms and Records, Maintenance ............................................................................................................ 1-1 

Functional Description of Major Components ........................................................................................... 1-9 

Gage 

F 

G 


Replacement, PE ............................................................................................................................ 2-18 

Tubing Replacement ....................................................................................................................... 2-19 

Tubing Straight Pipe Adapter Replacement .................................................................................... 2-21 

HSFC 

Description ..................................................................................................................................... 1-6 

Description ...................................................................................................................................... 1-6 




Hermetically Sealed Filter Canister (see HSFC) 

Illustrated List of Manufactured Items, Appendix E ................................................................................... E-1 

Impeller, Recirculation Filter, Replacement .............................................................................................. 2-26 

Interval Timer 


Replacement .................................................................................................................................. 2-22 

Liner (see Room Liner) 

H 

I 

L 

Index-2


INDEX 

Subject 

Page 

Maintenance Allocation Chart, Appendix B ........................................................................................... B-1 

Maintenance, Unit .................................................................................................................................... 2-1 

Maintenance Forms and Records ............................................................................................................. 1-1 

Maintenance Procedures .......................................................................................................................... 2-17 

Major Components 


Location and Description ................................................................................................................ 1-4 

Malfunctions ............................................................................................................................................. 2-12 

Manufactured Items, Illustrated List, Appendix E ...................................................................................... E-1 

Marking for Shipment ............................................................................................................................... 2-43 

Model Differences .................................................................................................................................... 1-8 

Motor Blower Assembly 

Electronic Components Shield Replacement .................................................................................. 2-39 


Repair ............................................................................................................................................. 2-30 

Troubleshooting .............................................................................................................................. 2-14 

Nomenclature Cross-Reference ............................................................................................................... 1-2 

Operating Power Requirements .............................................................................................................. .. 1-8 

Packaging ...................................................................................................... ........................................ 2-43 

PMCS ...................................................................................................................................................... 2-3 

Annual ..................................................................................................................................................... 2-11 

Semiannual .............................................................................................................................................. 2-4 

Power Cables 

Description ............................................................................................................................................... 1-7 

Inspection, PMCS .................................................................................................................................... 2-8 

Power Requirements ................................................................................................................................ 1-8 

Preparation for Storage and Shipment ..................................................................................................... 2-43 

Preservation, Packaging, Packing, Marking, and Shipping ....................................................................... 2-43 

Pressure Gage (see Gage) 

Preventive Maintenance Checks and Services, Operator (see PMCS) 

Principles of Operation, Technical ............................................................................................................ 1-9 

Procedures, Maintenance ......................................................................................................................... 2-17 

Protective Entrance 

Description ............................................................................................................................................... 1-5 

Dome Light Lamp Replacement ............................................................................................................... 2-23 

Dome Light Repair ................................................................................................................................... 2-24 

Functional Description .............................................................................................................................. 1-9 


M 

N 

O 

P 

Index-3


INDEX 

Subject 

Page 

Interval Timer, Stamped Nut, and Knob Replacement .................................................................... 2-22 

Repair ............................................................................................................................................. 2-18 


Recirculation Filter 

Description ............................................................................................................................................... 1-6 

Fan Impeller Blade Replacement ............................................................................................................. 2-26 

Filter Element Replacement ..................................................................................................................... 2-25 


Repair ...................................................................................................................................................... 2-25 

Service Upon Receipt .............................................................................................................................. 2-1 

Troubleshooting ....................................................................................................................................... 2-15 

Records and Forms, Maintenance ............................................................................................................ 1-1 

References, Appendix A ........................................................................................................................... A-I 

Repair Parts ............................................................................................................................................. 2-1 

Repair Parts and Special Tools List, Appendix C ...................................................................................... C-1 

Repair Procedures ................................................................................................................................... 2-17 

Reporting Equipment Improvement Recommendations ................................................................................ 1-2 

Room Adapter 

Description ............................................................................................................................................... 1-4 


Room Liner 

Description ............................................................................................................................................... 1-4 




Troubleshooting ....................................................................................................................................... 2-13 

Safety, Care, and Handling ...................................................................................................................... 1-2 

SCPE Liners (see Room Linner) 


Shipment ................................................................................................................................................. 2-43 

Special Tools, TDME, and Support Equipment ......................................................................................... 2-1 

Storage and Shipment, Preparation .......................................................................................................... 2-43 

Support Equipment .................................................................................................................................. 2-1 

Support Kit (see Accessory Package) 

Symptom Index ........................................................................................................................................ 2-12 

System Description .................................................................................................................................. 1-9 

TDME 2-1 

Technical Principles of Operation ............................................................................................................. 1-9 

Timer Bell (see Interval Timer) 

Troubleshooting Procedures, Unit ............................................................................................................ 2-12 

Tubing, PE Gage, Replacement ............................................................................................................... 2-19 

R 

S 

T 

Index-4


INDEX 

Subject 

Page 

Vents 


Weights and Dimensions .......................................................................................................................... 1-8 

V 

W 

Index-5

PIN: 074331-000

TM 3-4240-313-20&P SIMPLIFIED COLLECTIVE PROTECTION ...

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