15
NoTe:
This is a partial list of possible problems and recommended treatments.
For more information, refer to the second-stage troubleshooting guide, or contact
Aqua Lung Technical Services Department for assistance with problems
not described here.
CAUTION:
Recommended treatments which require disassembly of the
regulator must be performed during a complete overhaul, according to
the prescribed procedures for scheduled, annual service. Do not attempt
to perform partial service.
Table 1: Troubleshooting Guide
SyMpTOM
pOSSiBLE CAuSE
TREATMENT
high pressure creep
(also called second stage leaks)
1. The hP seat (57) is worn or damaged.
1. Replace hP seat
2. The crown (55) is damaged.
2. Replace crown
3. The spring block (61) internal wall is
damaged.
3. Replace spring block
4. The o-ring (59) is worn or damaged.
4. Replace o-ring
External Air Leak
(immersion Test)
1. The diaphragm (31) is worn or damaged.
1. Replace diaphragm
2. diaphragm sealing area is damaged.
2. Replace body
3. Port plug o-rings (44 & 46) are worn or
damaged.
3. Replace o-rings
Second Stage Leaks
1. hP leaks.
1. see high Pressure creep symptoms
2. The o-rings (48) are worn or damaged.
2. Replace o-rings
3. The o-ring (48) sealing surface is
damaged.
3. Replace adjustable nozzle
4. The adjustable nozzle (49) is damaged.
4. Replace adjustable nozzle
5. LP seat (42) is worn or damage.
5. Replace LP seat
6. mP is set incorrectly.
6. set mP to 135 ±5 psi
7. Locknut (33) is tightened too much.
7. Readjust locknut
8. Nozzle is backed out too far.
8. Set nozzle flush with cone
Significant Breathing Resistance
1. filter (62) is clogged
1. Replace filter
2. Lever (35) is bent.
2. Replace lever
3. Lever (35) is set too low.
3. Readjust locknut
4. Insufficient MP.
4. Readjust mP
5. Inhalation/exhalation valves are installed
incorrectly or hoses are installed on
wrong outlets.
5. check valve/hose installation
6. Nozzle (49) is in too far.
6. Set nozzle flush with cone
7. Locknut (33) is backed out too far.
7. Readjust locknut
