SERVICE MANUAL MIKRON SECOND STAGE Copyright ©2006 Aqua Lung France Ref : Service Manual - Mikron 2nd Stage Rev.
Service Manual Mikron 2nd Stage Index COPYRIGHT............................................................................................................................... 3 INTRODUCTION........................................................................................................................ 3 WARNINGS, ATTENTION, NOTES..........................................……………............................... 3 MAINTENANCE.............................................................................
F I R S T T O 3 D I V E COPYRIGHT GENERAL INSTRUCTIONS This manual is the property of Aqua Lung France. Any copying, photocopying, reproduction, translation, electronic distribution (email, Internet...), even partial, and in whatever format, is expressly forbidden without the written consent of Aqua Lung France. 1. In order to carry out the procedures described in this manual correctly it is important that you follow the steps in the exact order indicated.
Service Manual Mikron 2nd Stage 4. The acronyms used: LP: Low Pressure MP: Medium Pressure HP: High Pressure 5. Numbers in brackets indicate the part number of the component shown on the exploded view attached. 1. Using a flat screwdriver, lift the two clips of the deflector (127825) then remove it manually. 2. Using 2 11/16 spanners hold the screw (127819) and unscrew the swivel nut on the hose. Remove the O-ring from the hose nipple. Take care to avoid damaging the seal groove.
F I R S T T O 5 D I V E 6. Using the tool (129198), unscrew the diaphragm nut (127814 or 127832). Remove the washer (127815) and the diaphragm (127816). 7. Using the 11/16” spanner, unscrew the nut (127818). 8. Push slightly the valve spindle (127817). Unscrew the valve spindle screw (127819) from the valve spindle. 9. Turn over the 2nd stage and recover the shuttle-valve assembly (AP2036), spring (AP2021) and counterbalance chamber (127607).
Service Manual Mikron 2nd Stage Before starting to re-assemble the regulator, make sure that all replacement parts have been cleaned and lubricated in accordance with Procedure A : Cleaning and Lubricating on page 13. 5. Maintain the lever in the upper position. Fit the assembly (shuttle valve – spring – counter balance chamber) into the valve spindle taking care to position the tabs of the shuttle valve facing the tabs on the lever. 6.
F I R S T T O 7 D I V E 16. With the flat side of the casing at eye level, screw in the adjusting knob until the lever is about 4mm below the level of the casing edge. Now unscrew it until the lever just shows above the edge of the casing. Press on the lever and check that it returns to the high position (the sign that the shuttle valve is well positioned). 11. Maintain the lever in the upper position. Push slightly the assembly outside the casing, and screw the valve spindle screw until its stop. 12.
Service Manual Mikron 2nd Stage MINI 19. nd Close the air supply and purge the 2 stage. Remove the adjustment tool. Fit the diaphragm (127816). Press well in all around its edges to ensure that it is correctly positioned. Fit the washer (127815) and then using the lug spanner (129198) screw in the diaphragm nut (127814 or 127832). 22. Using a 11/16” spanner, maintain the nut (127818) and then tight the hose nut to 0.3m.kg.
F I R S T T O D I V E Note: Tests 2,3 et 4 require the use of a regulator test bench. 2. Check opening effort. Apply a gradual inhalation effort. When the MP starts to fall, release the pressure and compare the result with the limits shown in Table 5. Checking Specifications. If the opening effort is outside these limits consult Table 1. Troubleshooting Guide. If the adjusting screw 127823 is not correctly adjusted, unscrew it until its stop and then screw it to one turn and 3/4 turn.
Service Manual Mikron 2nd Stage Table 1. Troubleshooting Guide SYMPTOM Leak or free flow at 2nd stage Insufficient purge flow or work of breathing too high Water leak POSSIBLE CAUSE TREATMENT 1. MP too high 1. Refer to First stage Troubleshooting Guide 2. The valve (AP2034) is worn or damaged. 2. Replace the valve 3. The seat (AP2033) is not correctly adjusted 3. Readjust the seat 4. The lever (127828) is bent 4. Replace the lever 5. The sealing face of the seat (AP2033) is damaged. 5.
Service Manual Mikron 2nd Stage 11 Table 2. List of Tools and Service Kits DESCRIPTION APPLICATION US PART NO. MP pressure gauge complete 0/16B Checking medium pressure 111610 O-ring tool Fitting and removing O-rings 944022 116236 Seat fitting tool Seat assembly/disassembly 109436 129198 Ring tool Tighten/loosen diaphragm washer and ring cover on Mikron Seat adjustment tool Adjusting seat under pressure 122155 Torque wrench 0.5 m.
Service Manual Mikron 2nd Stage Table 3. Recommended cleaners and lubricants LUBRICANT / CLEANER Christolube MCG 111 APPLICATION All O-rings SOURCE Aqua Lung, ref. 480025 Attention: Silicone parts do not require lubrication. Do not grease them. Greasing silicone parts can change their molecular construction and cause premature degradation of the material. Oakite #31 Acid bath for cleaning brass and stainless steel parts. Oakite Products, Inc.
Service Manual Mikron 2nd Stage 13 Procedure A Cleaning and Lubricating (All Aqua Lung Regulators) Cleaning brass and stainless steel parts. 1. 2. 3. Pre-clean by soaking in NETALU diluted to 25%. Cleaning in an ultra-sonic bath filled with a mixture of washing-up liquid + hot water. If some resistant deposits remain then fill the ultrasonic bath with white vinegar and repeat. DO NOT put plastic, rubber, silicone or anodised aluminium parts in contact with vinegar.
Service Manual Mikron 2nd Stage Table 4. Torque values N° REFERENCE DESCRIPTION FORCE 127818 Insert screw 3 N.m 129861 Hose Nut 3 N.m 127824, 127833 and 127846 Plug 0.5 N.m Table 5. Checking specifications TEST INSTRUCTIONS SPECIFICATIONS Leak Test 160 bar < Working pressure < 200 bar No leak Medium Pressure 160 bar < Working pressure < 200 bar MP at 9.5 bar ± 0.5 bar Opening effort 160 bar < Working pressure < 200 bar Mikron : between 2.8 mbar and 3.
Service Manual Mikron 2nd Stage Maintenance Notes.
Service Manual Mikron 2nd Stage Exploded view of Mikron Lady 2nd stage.
Service Manual Mikron 2nd Stage Exploded view of Mikron 2nd Stage
Service Manual Mikron 2nd Stage Exploded view of Mikron Octopus 2nd Stage
Service Manual Mikron 2nd Stage 1ere Avenue – 14e rue – BP 148 06513 CARROS cedex – France 00.33.(0)4.92.08.28.88 FAX 00.33.(0)4.92.08.28.
