Aqua Lung APEKS TX 50 Technical Manual page 22

22
SYMPTOM
Leakage or freeflow from TX
Second Stage
Low purge or excessive work of
breathing (full cylinder)
Water entering TX Second
Stage
Table 2: Second Stage Troubleshooting Guide
POSSIBLE CAUSE
1. Excessively high first-stage
intermediate pressure.
2. MP Seat (29) damaged or worn.
3. Seat (18) adjusted incorrectly, Lever
(21) set too high.
4. Lever (21) bent.
5. Seat (18) sealing surface damaged.
6. Valve Spring (26) damaged.
7. Shuttle Valve o-ring (27) damaged.
8. Counter Balance Cylinder (25) bore
damaged.
1. Low first-stage intermediate
pressure.
2. Seat (18) adjusted incorrectly, Lever
(21) set too low.
3. Intermediate pressure hose clogged
or obstructed.
4. Lever (21) bent or catching on Valve
Spindle (20).
1. Mouthpiece (14) damaged or incor-
rectly fitted.
2. Diaphragm (9) damaged.
3. Diaphragm (9) improperly seated in
Case (10).
4. Exhaust Valve (11) damaged.
5. Case (10) damaged. (Check exhaust
valve seating surface.)
6. Heat exchanger o-ring (3) damaged.
TX50 Technical Manual
TREATMENT
1. Refer to Table 1 - First Stage
Troubleshooting Guide.
2. Replace Rubber Seating.
3. Reset Seat preliminary
settings, and repeat Adjustment
Procedures.
4. Replace Lever.
5. Replace Valve Seat.
6. Replace Spring.
7. Replace o-ring.
8. Replace Counter Balance
cylinder.
1. Refer to first-stage
Troubleshooting Guide.
2. Reset Seat preliminary
settings, and repeat Adjustment
Procedures.
3. Clean or replace Hose.
4. Replace Lever.
1. Replace or re-fit Mouthpiece as
appropriate.
2. Replace Diaphragm.
3. Remove Front Cover (7) and
Diaphragm Cover (8) properly
reassemble Diaphragm (check
for distortion).
4. Replace Exhaust Valve.
5. Disassemble and replace Case.
6. Replace o-ring