Aqua Lung SEA LV2 Technical Manual
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Aqua Lung SEA LV2 Technical Manual

Survival egress air
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See also: User Manual
Tertiary Branding
Survival Egress Air
(SEA MK / LV2)
TECHNICAL MANUAL
Rev. 6/17

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Summary of Contents for Aqua Lung SEA LV2

  • Page 1 Tertiary Branding Survival Egress Air (SEA MK / LV2) TECHNICAL MANUAL Rev. 6/17...
  • Page 2 Aqua Lung America. It may not be distributed through the internet or computer bulletin board systems without prior consent in writing from Aqua Lung America.

  • Page 3: Table Of Contents

    CONTENTS Introduction ............................4 Disassembly Procedure ........................5 First Stage Disassembly ........................5 Second Stage (MK) Disassembly....................8 Second Stage (LV2) Disassembly ....................9 Valve Body Disassembly .......................10 Reassembly Procedure ........................10 First Stage Reassembly ........................10 First Stage Testing ........................14 Valve Body Reassembly ........................15 Second Stage (MK) Reassembly ....................16 Second Stage (LV2) Reassembly ....................

  • Page 4: Introduction

    7. When instructed to remove an o-ring, use the pinch method (see illustration below) or use a brass or plastic 4. Use only genuine Aqua Lung ® parts provided in the over- o-ring removal tool. Avoid using hardened steel picks haul parts kit for this product.

  • Page 5: Disassembly Procedure

    DISASSEMBLY PROCEDURE 3. Remove o-ring (25) from the hose swivel on the MP hose (11) using the stainless steel NOTE: Before performing any disassembly, refer to the o-ring tool (PN 10-102-400). exploded parts drawing, which references all mandatory replacement parts. These parts should be replaced with new service kit parts.
  • Page 6 SEA MK / LV2 Technical Manual Disassembly of Handwheel 11. Insert the squared end of the stem (28) into the seat & 7. Unscrew the handwheel retainer (15) using the modified disc retainer (29) and unscrew screwdriver. Remove the handwheel washer (16), spring (17) it from the first stage body (8).
  • Page 7 15. Using a 1/8" hex bit socket and flex wrench, unscrew the 19. Remove the o-ring (32) from the fill port (33) and o-ring retainer (42) from the pressure indicator body (38). Remove the (34) from the fill port pin (35). plunger (41) and spring (40) from the pressure indicator body.

  • Page 8: Second Stage (Mk) Disassembly

    SEA MK / LV2 Technical Manual 24. Remove o-rings (3 & 5) from the piston (4). Insert the Second Stage (MK) Disassembly seat extraction tool into the open end of the piston and push out the HP seat (6). 1. Use diagonal pliers to cut the strap clamp (50) and remove the mouthpiece (49) from the box bottom (54).

  • Page 9: Second Stage (Lv2) Disassembly

    3. Lift out the front cover (66) and diaphragm (48). Inspect the NOTE: Set the valve body assembly to the side, diaphragm for any tears or pin holes by holding it up to a light disassembly will continue during the Valve Body and gently stretching around the perimeter.

  • Page 10: Valve Body Disassembly

    (56). Remove the washer (61), lever (60), spring (57) ever assembling any Aqua Lung product. DO ® and poppet (56) from the valve body (59). NOT attempt to substitute an Aqua Lung part ® with another manufacturer’s, regardless of any similarity in shape, size or appearance. Doing...
  • Page 11 3. Install o-ring (3) and o-ring (5) onto the piston (4). Closely 7. Install o-ring (32) onto the fill port (33). Insert the fill port pin inspect the edges of new HP seat (6). One edge is sharp (35), o-ring side first, into the male-threaded end of the fill port. and one edge has a bevel.
  • Page 12 SEA MK / LV2 Technical Manual Reassembly of Pin Style Pressure Gauge 14. Thread the safety plug (9) into the lower HP port (opposite the fill port) on the first stage body (8). Use a 3/8” socket and 10. Insert o-ring (34) into the pressure indicator body (38), inch pound torque wrench to apply 90 in-lbs (10.2 Nm) of torque to the safety plug.
  • Page 13 Reassembly of Handwheel 19. Use a 3/4” socket and inch pound torque wrench to apply 90 in-lbs (10.2 Nm) 16. In the following order, of torque to the bonnet (21). place a new Teflon washer (27), brass washer (26), o-ring (25) and back-up ring (24) onto the stem (28).

  • Page 14: First Stage Testing

    SEA MK / LV2 Technical Manual 24. Pass the threaded end of the swivel port plug (14) through 4. Screw the test gauge onto the MP hose (11) until hand- the hose swivel on the MP hose (11) making sure both o-rings tight.

  • Page 15: Valve Body Reassembly

    Valve Body Reassembly CAUTION: If resistance is felt, immediately stop and unscrew the valve body (59) from the inlet fitting (51) to check the alignment of the poppet shaft (56) and poppet bearing (58). Excessive force and misalignment 1. Install o-ring (23) onto the will result in damage to the poppet bearing, requiring inlet fitting (51).

  • Page 16: Second Stage (Mk) Reassembly

    SEA MK / LV2 Technical Manual Second Stage (MK) Reassembly 9. Screw the valve assembly onto the MP hose (11) until hand tight. Slowly open the handwheel (18) to pressurize 1. Install the exhaust valve (53) into the box bottom (54) by the system.

  • Page 17: Second Stage (Lv2) Reassembly

    Second Stage (LV2) Reassembly 5. Place the diaphragm (48) on top of the lever (60) inside the box bottom (54). Make sure the edges of the diaphragm are seated below the threads inside the box bottom. Lay the flat 1. Install the exhaust valve (68) into the box bottom (69) by side of the ring cover support (47) on top of the diaphragm.
  • Page 18 SEA MK / LV2 Technical Manual 5. Place the diaphragm (48) on top of the lever (60) inside the box bottom (69). Make sure the edges of the diaphragm are seated below the threads inside the box bottom. Lay the front cover (66) on top of the diaphragm.

  • Page 19: Final Testing

    FINAL TESTING 2. Submerge the entire system in a test tank of clean water. Shake the unit to remove trapped bubbles. Ob- serve any bubbles rising from the submerged system WARNING: Compressed air can be highly explosive over a five minute period. The recommended time is and is dangerous if misused.
  • Page 20 SEA MK / LV2 Technical Manual TABLE 1: TROUBLESHOOTING GUIDE FIRST STAGE SYMPTOM POSSIBLE CAUSE TREATMENT 1. The seat & disc retainer (29) is worn or 1. Replace seat & disc retainer (29). System will not remain depressurized after damaged. handwheel is closed and second stage is 2.
  • Page 21 6. Disassemble and replace o-ring (23). NOTE: This is a partial list of problems and recommended treatments. For more information contact your Aqua Lung Technical Service Department for assistance with problems not described in the Table 1 & 2: Troubleshooting Guides.
  • Page 22 SEA MK / LV2 Technical Manual TABLE 3: LIST OF TOOLS AND SERVICE KITS PART # DESCRIPTION APPLICATION SEA MK Tool Kit (Tools in addition to those listed below are 108342 Tools Kit for servicing SEA MK / LV2 included in the tool kit. Additional tools are for MRS III portable refill station service).
  • Page 23 TABLE 3: LIST OF TOOLS AND SERVICE KITS (CONTINUED) PART # DESCRIPTION APPLICATION Magnifier 9-BA819008 Inspection of parts w/Illumination Christo-Lube 820466 Parts lubrication MCG 111 2 oz. Screwdriver 947448 Medium Blade Removal / Installation of Handwheel Retainer (15) (Modified) Strap 54325A22 Removal / Installation of First Stage Body (8) from Cylinder (43) Wrench...
  • Page 24 SEA MK / LV2 Technical Manual TABLE 3: LIST OF TOOLS AND SERVICE KITS (CONTINUED) PART # DESCRIPTION APPLICATION Diagonal Pliers 9-45171 Removal / Installation of Clamp Strap (50) Small Valve Handle 053035 Removal / Installation of Pin Style Pressure Indicator (37) Retainer Tool Removal / Installation of First Stage Body (8) from Cylinder (43) Insert, Tool...
  • Page 25 MP 135 ±20 PSI (9.3± 1.4 BAR) 5 SCFM (142 LPM) flow rate (minimum) TABLE 6: RECOMMENDED CLEANERS AND LUBRICANTS LUBRICANT/CLEANER APPLICATION SOURCE Aqua Lung, PN 820466, or Lubrication Technologies Christo-Lube MCG 111 All o-rings 310 Morton Street Jackson, OH 45640...

  • Page 26: Procedure A: Cleaning And Lubricating

    SEA MK / LV2 Technical Manual PROCEDURE A: CLEANING AND LUBRICATING Cleaning Brass & Stainless Steel Parts 1. Pre-clean in warm, soapy water* using a nylon bristle tooth brush. 2. Thoroughly clean parts in an ultrasonic cleaner filled with soapy water. If there are stubborn deposits, household white distilled vinegar (acetic acid) in an ultrasonic cleaner will work well.

  • Page 27: Sea First Stage Exploded View

    SEA FIRST STAGE EXPLODED VIEW 25 ft-lbs (33.9 Nm) 60 in-lbs (6.8 Nm) 90 in-lbs 90 in-lbs (10.2 Nm) 45 in-lbs (10.2 Nm) (5 Nm) 90 in-lbs (10.2 Nm) 90 in-lbs (10.2 Nm) Key # Part # Description Key # Part # Description ..108343 Overhaul Service Kit, SEA First Stage...

  • Page 28: Mk Second Stage Exploded View

    SEA MK / LV2 Technical Manual MK SECOND STAGE EXPLODED VIEW 50 in-lbs (5.6 Nm) 60 in-lbs (6.8 Nm) Key # Part # Description Key # Part # Description 52 ..100907 Cover, Exhaust Valve ..108344 Overhaul Service Kit, SEA MK Second Stage 53 ..100922 Exhaust Valve ..108315...

  • Page 29: Lv2 Second Stage Exploded View

    LV-2 SECOND STAGE EXPLODED VIEW 60 in-lbs (6.8 Nm) 50 in-lbs (5.6 Nm) Key # Part # Description Key # Part # Description ..108344 Overhaul Parts Kit 60 ..100923 Lever ..108402 Second Stage, LV2, Spare 61 ..104129 Washer 62 ..102510 Locknut 64 ..100652 Hard Cover, Purge...

  • Page 30: Maintenance Notes

    SEA MK / LV2 Technical Manual MAINTENANCE NOTES...
  • Page 31 MAINTENANCE NOTES...
  • Page 32 Blue = Pantone 2728C Primary/Preferred Branding Survival Egress Air Secondary Branding (SEA MK / LV2) Technical Manual Tertiary Branding 2340 Cousteau Court • Vista, CA 92081 Phone (760) 597-5000 • Fax (760) 597-4900 www.aqualung.com/militaryandprofessional ©2017 Aqua Lung International...

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