Aqua Lung SEA MK Anleitung zur Fehlerbehebung PDF herunterladen (Seite 18)

SEA MK Technical Maintenance Manual

Table 1: Troubleshooting Guide

First Stage/Valve Assembly

SYMPTOM POSSIBLE CAUSE TREATMENT

LP system will not remain depressurized

after valve is shut and second stage is

purged.

1. The valve seat (20) is worn or damaged. 1. Replace valve seat.

2. The valve seating surface is damaged. 2. Replace body (36).

High or Unstable MP

1. The valve seat (20) is worn or damaged. 1. Replace valve seat .

2. The valve seating surface is damaged. 2. Replace body (36).

3. The main spring (35) is defective. 3. Replace main spring.

4. The HP seat (34) is worn or damaged. 4. Replace HP seat.

5. The HP crown sealing surface is

damaged.

5. Replace o-ring.

Low MP

1. Main spring (35) is weakened or

damaged.

1. Replace spring (35).

External Air Leak

1. The piston head o-ring (31) or shaft o-ring

(33) is worn or damaged.

1. Replace o-ring(s).

2. The o-ring grooves on the piston (32)

are damaged.

2. Replace piston.

3. The piston head o-ring sealing surface in

the piston cap (30) is damaged.

3. Replace piston cap.

4. The piston shaft o-ring sealing surface in

the body is damaged.

4. Replace body.

5. Blow out plug not seated correctly.

5. Retorque or replace.

6. Check seating surface for nicks or

debris.

Table 2: Troubleshooting Guide

Second Stage

SYMPTOM POSSIBLE CAUSE TREATMENT

Leakage or freeow from the

second stage

1. High rst stage MP (should be 135±20

psi).

1. Refer to rst stage Troubleshooting

Guide above.

2. The LP seat (51) is worn or damaged. 2. Replace LP seat.

3. The lever (45) is set too high. 3. Readjust locknut.

4. The lever (45) is damaged.

4. Disassemble second stage

and replace lever.

5. The crown sealing surface on the inlet

tting (52) is worn or damaged.

5. Replace inlet tting.

6. The poppet (50) is worn or damaged. 6. Replace poppet and LP seat.

7. The poppet spring (49) is damaged. 7. Replace poppet spring.

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