ROUTINE
ROUTINE
ROUTINE
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<strong>ROUTINE</strong><br />
MWO effective date is 04 Jan 99 and completion date is 31 Dec 2003<br />
MODIFICATION WORK ORDER<br />
MWO 3-4230-228-20-1<br />
MODIFICATION OF THE DECONTAMINATING APPARATUS: POWER<br />
DRIVEN, LIGHTWEIGHT,<br />
M17 LDS NSN 4230-01-251-8702<br />
M17A1 LDS NSN 4230-01-303-5225<br />
M17A2 LDS NSN 4230-01-346-1778<br />
M17A3 LDS NSN 4230-01-346-3122<br />
Headquarters, Department of the Army, Washington, D.C.<br />
Current as of 8 January 1999<br />
REPORTING ERRORS AND RECOMMENDING IMPROVEMENT<br />
You can help improve this MWO. If you find any mistakes or if know of a way to improve these<br />
procedures, please let us know. Write a letter or complete and mail a DA Form 2028,<br />
Recommended Changes to Publications and Blank Forms, to Soldier and Biological Chemical<br />
Command, ATTN: AMSSC-HB-DMT (RI), Rock Island, IL 61299-7390. A reply will be provided to<br />
you.<br />
DISTRIBUTION STATEMENT C: Distribution authorized to U.S. Government agencies and their<br />
contractors in order to protect information and technical data developed by government agencies<br />
and their contractors that address current technology in areas of potentially significant military<br />
application. This determination was made on 7 July 1987. Other requests for this document will<br />
be referred to Soldier and Biological Chemical Command, ATTN: AMSCC-HB-DMT (RI), Rock<br />
Island, IL 61299-7390.<br />
WARNING: This document contains technical data whose export is restricted by the Arms Export<br />
Control Act (Title 22,U.S.C., SEC 2751 et seq.) or The Export Administration Act of 1979, As<br />
Amended (Title 50, U.S.C., APP 2401 et seq.). Violations of these export laws are subject to<br />
severe criminal penalties.<br />
HANDLING AND DESTRUCTION NOTICE: Comply with distribution statement and destroy by<br />
any method that will prevent disclosure of contents or reconstruction of the document.<br />
1. PURPOSE: The purpose of this modification is to add a shut-off gate valve to the siphon<br />
injector assembly of the M17 Series Decontamination System. With the shut-off valve installed,<br />
the injector can be turned off to stop any unwanted siphoning flow from the water source<br />
between wash operations. Besides the waste of water, the operator had to also elevate the<br />
injector assembly above the height of the water source to keep the water from flowing out of the<br />
injector assembly. The installed gate valve will allow the operator to lay the injector assembly on<br />
the ground in the wash area between operations, saving both time and water.<br />
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MWO 3-4230-228-20-1<br />
2. PRIORITY: This modification is classified <strong>ROUTINE</strong>.<br />
3. END ITEM OR SYSTEM TO BE MODIFIED: See below.<br />
M17 Lightweight Decontamination System (LDS) NSN 4230-01-251-8702<br />
M17A1 LDS NSN 4230-01-303-5225<br />
M17A2 LDS NSN 4230-01-346-1778<br />
M17A3 LDS NSN 4230-01-346-3122<br />
NOTE<br />
This MWO shall not be applied to A/E32U-8 Decon System NSN 4230-01-153-<br />
8660.<br />
4. MODULE(S) (COMPONENTS, ASSEMBLIES, SUBASSEMBLIES) TO BE MODIFIED:<br />
The following items, whether installed or in PLL/ASL or depot stock, shall be modified.<br />
NOMENCLATURE NSN CAGEC PART NUMBER<br />
Injector Assembly 4230-01-295-2443 81361 5-45-4918<br />
Injector Assembly is one of the components located in the Accessory Box Part Number 5-45-<br />
4950.<br />
5. PARTS TO BE MODIFIED: Not applicable.<br />
6. APPLICATION:<br />
a. Time Compliance Schedule: This MWO is effective 04 Jan 1999 and the completion date<br />
is 31 Dec 2003.<br />
b. Level of Maintenance: Unit Maintenance personnel are authorized to apply this MWO with<br />
MOS’s of 54B or 63J.<br />
c. Application Time: The total man-hours required for a single application of this MWO is<br />
0.33 hours.<br />
d. This MWO does not effect any other MWO or upgrade.<br />
7. TECHNICAL PUBLICATIONS AFFECTED/CHANGED: TM 3-4230-228-10 with Changes 1-<br />
5 and TM 3-4230-228-23&P with Changes 1-2. Both TM’s will be updated to show and explain<br />
the function of the new gate valve on the Injector Assembly and to add the new parts to the<br />
Repair Parts and Special Tools List (RPSTL).<br />
8. MWO KIT(S)/PARTS(S) AND THEIR DISPOSITION:<br />
a. Kit(s)/Part(s) Needed to Apply the MWO:<br />
NOMENCLATURE CAGEC PART NUMBER QTY FIG 3,ITEM No.<br />
Adapter, 0.75-in. Female, 45332 RL-01642827 1 3<br />
BSPP to 0.75-in. Male NPT<br />
Gate Valve 0.75-in. NPT 12168 T113 1 4<br />
Coupling Half, 96906 MS27022-4 1 5<br />
Quick Disconnect<br />
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MWO 3-4230-228-20-1<br />
b. Bulk And Expendable Material:<br />
NOMENCLATURE NSN CAGEC PART NUMBER UNIT OF ISSUE<br />
Sealant, Thread 8030-01-063-7510 81349 MIL-S-46163,TY I,GR L AR<br />
Or Alternate Loctite Thread Locking Compound Adhesive/Sealant No. 277<br />
c. Parts Disposition: Disposition of excess parts will be IAW AR 710-2, AR 735-5 and local<br />
policy.<br />
9. SPECIAL TOOLS; TOOL KITS; JIGS; TEST,MEASUREMENT AND DIAGNOSTIC<br />
EQUIPMENT (TDME); AND FIXTURES REQUIRED:<br />
Bench Vise with soft jaws or protective jaw covers.<br />
12-inch Crescent Wrench<br />
14-inch Pipe Wrench<br />
1-1/8 inch Open End Wrench<br />
1-5/16 inch Open End Wrench<br />
10. MODIFICATION PROCEDURES:<br />
NOTES<br />
For ease of disassembly and assembly, the nonmetallic tubing could be<br />
removed from the ball valve by loosening the hose clamp and removing the<br />
nonmetallic tubing.<br />
M17 series Decon Systems have been produced with two different<br />
configurations of the Injector Assembly. In the following disassembly<br />
instructions, please refer to either Figure 1 or Figure 2 that corresponds with<br />
your Injector Assembly.<br />
a. Disassembly<br />
(1) Mount the Injector Assembly in the Bench Vise by gripping the square center block (Item 1)<br />
in the vise jaws. Allow the steel adapter (Item 3) and quick disconnect coupling half (Item 4)<br />
or just the quick disconnect coupling half on some models (Item 3) to clear the vise jaws.<br />
CAUTION<br />
Injector assembly components can be very tight and difficult to remove due to<br />
the thread sealing compound. To avoid injury, ensure the Pipe Wrench does not<br />
slip off during use.<br />
(2) Use a 1-1/8 inch wrench to support the nozzle (Item 2) that threads into the back of the<br />
square block (Item 1).<br />
NOTE<br />
Nozzle must be supported to keep it from being removed from the square block<br />
of the Injector Assembly during the following step.<br />
(3) With the nozzle being held in place by the 1-1/8 inch wrench, use a pipe wrench to grip and<br />
remove the steel adapter (Item 3) and quick disconnect coupling half (Item 4) or remove the<br />
quick disconnect coupling half (Item 3) from the nozzle (Item 2). Clean all sealing compound<br />
from the nozzle threads.<br />
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MWO 3-4230-228-20-1<br />
10.MODIFICATION PROCEDURES: (Cont)<br />
b. Assembly<br />
NOTE<br />
The Brass Adapter, Gate Valve and Quick Disconnect Coupling Half are shipped<br />
together as a hand tighten assembly. Remove from the packaging and<br />
disconnect the three parts.<br />
Refer to Figure 3 for the following assembly instructions.<br />
(1) Apply a thin film of Sealing Compound (MIL-S-46163,TY I,GR L or alternate) to the male<br />
nozzle threads (Item 2) of injector and thread on the new brass adapter (Item 3) until the end<br />
of the threads stops assembly.<br />
(2) Use the Crescent wrench to tighten the new adapter (Item 3) onto the nozzle (Item 2).<br />
(3) Remove the injector assembly from the bench vise jaws and set aside.<br />
(4) Mount the new quick disconnect coupling half (Item 5) in the bench vise, so that the jaws<br />
clamp across the hex flats with the NPT threads facing outwards.<br />
(5) Apply a thin film of sealing compound (MIL-S-46163,TY I,GR L or alternate) to the male<br />
threads of the quick disconnect coupling half (Item 5) and thread on the new 0.75-in NPT<br />
gate valve (Item 4) until the end of the threads stops assembly.<br />
CAUTION<br />
Tighten the gate valve by using the hex flats closest to the coupling half.<br />
Tightening the gate valve from the hex flats opposite the coupling half may<br />
cause damage to the valve by crushing hex flats and deforming the valve<br />
threads.<br />
(6) Use a 1-5/16 inch wrench on the gate valve (Item 4) hex flats closest to the quick disconnect<br />
coupling half (Item 5) and tighten.<br />
(7) Remove the quick disconnect coupling half and gate valve assembly from the bench vise<br />
and mount the Injector Assembly in the vise jaws by gripping the square center block (Item<br />
1).<br />
(8) Apply a thin film of sealing compound (MIL-S-46163,TY I,GR L or alternate) to the male<br />
threads of the new brass adapter (Item 3) and thread on the new 0.75-in NPT gate valve<br />
(Item 4) and quick disconnect coupling half (Item 5) assembly until the end of the threads<br />
stops assembly. Tighten and position the gate valve (Item 4) handle 90 degrees to the upper<br />
siphon ball valve and nonmetallic hose (or hose adapter if nonmetallic hose was removed)<br />
as shown in Figure 3. Remove the assembly from the bench vise and allow the assembly to<br />
set for 48 hours to cure the sealing compound.<br />
(9) If nonmetallic hose was removed, install the hose to the hose adapter using the hose clamp.<br />
11. CALIBRATION REQUIREMENTS: Not applicable.<br />
12. WEIGHT AND BALANCE DATA: Weight and balance are not significantly affected.<br />
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MWO 3-4230-228-20-1<br />
13. QUALITY ASSURANCE REQUIREMENTS: Refer to Operator’s TM 3-4230-228-10 and test<br />
the injector assembly for leaks. Connect injector assembly to your M17 LDS and perform a spray<br />
mission with COLD water. Look for leaks around the thread connections. Test the gate valve for<br />
leaks by turning off the M17 LDS, close the injector gate valve, lay the injector on the ground<br />
and again look for leaks around the threaded connections. If a leak is found, disassemble the<br />
leaking thread joint, clean, reapply sealing compound and retest.<br />
14. RECORDING AND REPORTING OF THE MODIFICATION: Record and report<br />
accomplishment of this modification in accordance with DA PAM 738-750, The Army<br />
Maintenance Management System (TAMMS). DA Form 2407 shall be completed and submitted<br />
within 3 days of accomplishment of modification. After completion, copies of DA Form 2407 will<br />
be distributed as follows:<br />
a. Copy 1: Retained by using unit.<br />
b. Copy 2: Commander<br />
US Army Soldier and Biological Chemical Command<br />
ATTN: AMSSC-HB(RI) MWO Office<br />
Rock Island, IL 61299-7390<br />
15. MATERIAL CHANGE (MC) NUMBER: This MWO is authorized by MC No. 1-96-08-8001.<br />
16. MODIFICATION IDENTIFICATION: Modified Injector Assembly can be identified by the<br />
mounted 0.75-in. NPT Gate Valve with a circular on-off handle.<br />
5
MWO 3-4230-228-20-1<br />
6
7<br />
MWO 3-4230-228-20-1
MWO 3-4230-228-20-1<br />
8
05667<br />
To be distributed in accordance with initial distribution number<br />
(IDN) 280854, requirements for MWO 3-4230-228-20-1.
077099-000
PIN 077099-000