Related Manuals for Aqua Lung Legend LX Second Stage
Summary of Contents for Aqua Lung Legend LX Second Stage
- Page 1 Authorized Technician TECHNICAL MAINTENANCE MANUAL LEGEND LX SECOND STAGE Copyright ©2000 Aqua Lung America, Inc. Rev. 7/2002...
-
Page 2: Table Of Contents
Legend LX Second Stage Service Manual Contents COPYRIGHT NOTICE...............................3 INTRODUCTION ...............................3 WARNINGS, CAUTIONS, & NOTES.........................3 SCHEDULED SERVICE............................3 GENERAL GUIDELINES ............................3 GENERAL CONVENTIONS............................4 DISASSEMBLY PROCEDURES..........................4 REASSEMBLY PROCEDURES..........................7 FINAL TESTING..............................10 Second Stage Opening Effort Test..............................10 Second Stage Air Flow Test................................10 Second Stage Purge Flow Test ................................. -
Page 3: Copyright Notice
This manual provides factory prescribed procedures for A visual inspection of the mouthpiece looking for tears the correct service and repair of the Aqua Lung Legend LX or holes. second-stage regulator. It is not intended to be used as an instructional manual for untrained personnel. -
Page 4: General Conventions
Legend LX Second Stage Service Manual GENERAL CONVENTIONS Using two ¹¹₁₆” wrenches, hold the retaining nut (15) stationary while turn the hose swivel counterclockwise. Unless otherwise instructed, the following terminology and Remove the o-ring (38) from inside the hose swivel. Exer- techniques are assumed: cise caution not to scratch the o-ring groove. - Page 5 Using the Retaining Ring Tool (pn 129001), unscrew and Turn the knob clockwise remove the diaphragm retainer (5). Lift out the washer (6) (inward) one turn. The and diaphragm (7). pin (24) should drop out. If the pin remains in the valve body, use a 1/16"...
- Page 6 Legend LX Second Stage Service Manual Remove the o-ring (22) To remove the exhaust from the valve body. tee (14), submerge the box bottom with tee in hot water (approximately 125°F) for 2 to 3 minutes. Grasp the tee by one of its wings and pull it off the box bottom.
-
Page 7: Reassembly Procedures
REASSEMBLY PROCEDURES With the “feet” of the shuttle valve pointing downward (away from the lever) and the lever pointing straight up If the exhaust valve (13) was removed, thread the tail (perpendicular to the valve body), insert the valve as- through the retaining hole on the outside of the box sembly into the valve body. - Page 8 Legend LX Second Stage Service Manual Press the grip (34) onto the adjustment knob. Using the While depressing the lever, insert the valve body through LX Tool, screw the plug (37) into the end of the adjust- the venturi lever and into the box bottom. Be sure that ment knob.
- Page 9 While holding the rim of the box bottom at eye level, turn Position the diaphragm (7) into the box bottom. Using the adjustable crown orifice in (clockwise) until the lever your finger or a small wooden dowel, work the edges drops about 4mm below the case rim.
-
Page 10: Final Testing
Legend LX Second Stage Service Manual Perform the venturi test: of H O for a standard 2nd-stage, or +1.1” to +1.7” of O for the supreme 2nd-stage. If the reading exceeds To test the venturi control, place the lever in the these specifications, refer to refer to “Table 1 - Trouble-... - Page 11 tion without excessive inhalation effort, freeflow, or “flut- tering” of the second-stage diaphragm. When exhaling, there should be no fluttering or sticking of the exhalation valve. If any of these problems occur, refer to Table 1 - Troubleshooting. This Ends Reassembly...
- Page 12 Legend First Stage Service Manual Table 1 - Troubleshooting Guide SYMPTOM POSSIBLE CAUSE TREATMENT 1. High first-stage intermediate pres- 1. Refer to first-stage Troubleshoot- sure. (should be 135±5 psi) ing Guide. 2. LP seat (26) damaged or worn. 2. Replace LP seat. 3.
- Page 13 Table 2 - Recommended Tool List PART NO. DESCRIPTION APPLICATION 111610 I.P. test gauge Intermediate pressure testing 944022 O-ring tool, set O-ring removal and installation 129001 Retaining Ring Tool Retaining ring removal and installation 109436 Seat extract/install tool Crown removal and installation 100190 Inline Adjustment Tool 2nd-stage adjustment...
- Page 14 LUBRICANT / CLEANER APPLICATION SOURCE Christo-Lube ® MCG-111 All O-rings seals Aqua Lung, PN 820466, or Lubrication Technologies 310 Morton Street Jackson, OH 45640 (800) 477-8704 CAUTION: Silicone rubber requires no lubrication or preservative treatment. DO NOT apply grease or spray to silicone rubber parts. Doing so may cause a chemical break- down and premature deterioration of the material.
-
Page 15: Procedure A - Cleaning And Lubrication
Procedure A Cleaning & Lubrication (All Aqua Lung Regulators) Brass and Stainless Steel Parts Preclean in warm, soapy water* using a nylon bristle tooth brush. Thoroughly clean parts in an ultrasonic cleaner filled with soapy water. If there are stubborn deposits, household white dis- tilled vinegar (acetic acid) in an ultrasonic cleaner will work well. - Page 16 Legend First Stage Service Manual Table 4 - Torque Specifications PART NUMBER DESCRIPTION / KEY NUMBER TORQUE AP2031 Retaining nut / 15 45±2 inch-lbs APF124563 Hose / 40 40±2 inch-lbs Table 5 - Test Bench Specifications TEST CONDITION ACCEPTABLE RANGE Leak Test Inlet 2,500-3,000 (±100) psig No leaks allowed...
-
Page 17: Legend Lx Exploded Parts Drawing
Legend LX Exploded Parts Drawing Key # Part # Description Key # Part # Description ------ 900012 Overhaul Parts Kit 22 ---- 820015 O-ring 23 ---- 129146 Valve Body ------ 129080 Legend LX, Second Stage Only 24 ---- AP1151 1 ----- 129179 Retaining Ring, Gold 25 ---- AP2035 Lever... - Page 18 2340 Cousteau Court, Vista, California 92083 www.aqualung.com Rev. 7/2002...
Need help?
Do you have a question about the Legend LX Second Stage and is the answer not in the manual?
Questions and answers