Helpful Hints; Troubleshooting - Sherwood Scuba maximus SRB5600 Assembly & Maintenance Manual

6.0 HELPFUL HINTS

6.1 TROUBLESHOOTING REGULATORS
POSSIBLE CAUSE
A. High Inhalation Effort at Depth:
1. Inlet filter clogged.
2. No air flowing through the dry air bleed system.
3. Air supply to first stage insufficient.
4. Second stage improperly adjusted.
B. Free Flowing:
1. Intermediate pressure too high.
2. Damaged or worn first stage piston seat.
3. Damaged or worn second stage poppet seat.
4. Nicked or corroded orifice sealing surfaces.
5. Second stage demand lever
6. Weak spring in second stage.
7. First or second stage improperly adjusted.
8. Parts in the second stage have been severely
chilled due to repeated purging and have shrunk,
allowing air to flow.
RECOMMENDED ACTION
Replace the filter.
Check the flow rate coming out of the
one-way bleed valve
air flow is detected, replace the flow
element assembly
Verify the supply air pressure. Make
sure the customer had the air valve
turned all the way on during the dive.
Repeat Steps 1 through 6 in Section
5.4, Set-Up of Second Stage.
Adjust intermediate pressure below
150 psi by removing shims
Replace piston seat
Replace second stage poppet seat
Polish the orifice sealing surfaces in
both the first and second stages with a
pencil eraser or polishing stick. If
damage is too severe to polish out,
replace orifice
bent too high. Adjust or replace the lever.
Replace the spring.
Refer to Sections 4.4 and 5.4 of this
manual.
Allow the second stage to warm back
up to room temperature. This chilling
will not occur in normal diving.
20
15 . If no or low
.
18
20 .
22
.
29 .
or .
4 16