Micra ADJ Layout - Aberdeen Watersports

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Table of ContentsIntroduction .................................................................................................... 3Warnings, Cautions, & Notes ........................................................................................... 3Scheduled Service ........................................................................................................... 3General Guidelines ........................................................................................................... 3Initial Inspection Procedure .......................................................................... 4External Inspection ........................................................................................................... 4Pressure Test .................................................................................................................... 4Disassembly Procedures............................................................................... 5Valve Disassembly Procedure - Revision A...................................................................... 6Valve Disassembly Procedure - Revision B...................................................................... 7Reassembly Procedures.............................................................................. 10Final Adjustment & Testing Procedures..................................................... 15Second Stage Air Flow Test............................................................................................ 17Second Stage Opening Effort Test ................................................................................. 17Second Stage Purge Flow Test ...................................................................................... 17External Leak Test .......................................................................................................... 18Subjective Breathing Test ............................................................................................... 18Table 1 – Troubleshooting Guide ................................................................ 19Table 2 – Recommended Tool List .............................................................. 20Table 3 – Standard Parts Replacement Schedule ..................................... 20Table 4 – Torque Specifications .................................................................. 21Table 5 – Test Bench Specifications ........................................................... 21Procedure A – Cleaning & Lubrication....................................................... 22Table A – Recommended Lubricants & Cleaners...................................... 23Second Stage Schematic ............................................................................ 25
Doc. #1008-89Service & Repair Manual - Micra ADJ Second StageIntroductionThis manual provides factory prescribed proceduresfor the correct service and repair of the MicraADJ second stage. It is not intended to be used as aninstructional manual for untrained personnel. Theprocedures outlined within this manual are to beperformed only by personnel who have receivedfactory authorized training through a U.S. Divers ® /Aqua-Lung ® Service & Repair Seminar.If you do not completely understand all of theprocedures outlined in this manual, contact U.S.Divers Co., Inc. to speak directly with a TechnicalAdvisor before proceeding any further.Warnings, Cautions, & NotesPay special attention to information provided inwarnings, cautions, and notes that are accompaniedby one of these symbols:A WARNING indicates a procedure or situationthat may result in serious injury or death ifinstructions are not followed correctly.A CAUTION indicates any situation or techniquethat will result in potential damage to theproduct, or render the product unsafe if instructionsare not followed correctly.A NOTE is used to emphasize importantpoints, tips, and reminders.Scheduled ServiceBecause the Micra ADJ regulator, complete with afirst stage, is considered to be a life-supportingproduct, it is extremely critical that it receives serviceaccording to the procedures outlined in thismanual on a regularly scheduled basis; at least oncea year with normal or infrequent use.NOTE: A unit that receives heavy or frequentuse, such as in rental, instruction, or commercialapplications, should be serviced at leasttwice each year - or more often - depending onthe conditions of use and the manner in whichit is maintained. (Refer to the care and maintenanceprocedures outlined in the Micra ADJOwner’s Manual.)GENERAL GUIDELINES1. In order to correctly perform the proceduresoutlined in this manual, it is important to followeach step exactly in the order given. Read overthe entire manual to become familiar with allprocedures before attempting to disassemble theMicra ADJ, and to learn which specialty toolsand replacement parts will be required. Keepthe manual open beside you for reference whileperforming each procedure. Do not rely onmemory.2. All service and repair should be carried out in awork area specifically set up and equipped forthe task. Adequate lighting, cleanliness, andeasy access to all required tools are essential foran efficient repair facility.3. Before beginning any disassembly, it is importantto first perform the Initial Inspection procedure,and refer to Table 1 - Troubleshooting todetermine the possible cause of any symptomswhich may be present.4. As each regulator is disassembled, reusablecomponents should be segregated and notallowed to intermix with non-reusable parts orparts from other regulators. Delicate parts,including inlet fittings and crowns which containcritical sealing surfaces, must be protectedand isolated from other parts to prevent damageduring the cleaning procedure.5. Use only genuine factory parts purchaseddirectly from U.S. Divers (or an authorizeddistributor outside of the U.S.) when servicingany U.S. Divers/ Aqua-Lung product. Substitutionwith another manufacturer’s parts constitutesan after-market modification of the product,and renders all warranties null and void.6. Do not attempt to reuse mandatory replacementparts under any circumstances, regardless of theamount of use the product has received since itwas manufactured or last serviced.7. Do not overtighten parts beyond their torquespecification when reassembling. Most partsare made of either marine brass or plastic, andcan be permanently damaged by undue stress.
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Micra ADJ Layout - Aberdeen Watersports

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