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 TM 55-1905-219-14-3
Table 3-52. Anchor Winch - Hydraulic Tank Balanced
Piston Relief Valves Troubleshooting (Cont).
NOTE
Refer to paragraph 3-137 for all maintenance procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Low pressure or no pressure.
Step 1.
Check for valve being improperly adjusted.
Adjust valve to proper setting.
Step 2.
Check if vent connection open.
Plug vent connection.
Step 3.
Check for plugged balance hole in piston.
Remove piston and clean out. If necessary, drain system and refill with
clean fluid.
Step 4.
Inspect for piston in cover not seating.
Back off adjusting screw several turns while running pump to be certain
foreign matter is not caught on the seat. Check condition of seat, spring
and piston if malfunction persists.
3. Excessive noise or chatter.
Step 1.
Check for high oil velocity through valve.
Check system.
Step 2.
Inspect for distorted control spring.
Replace spring.
Step 3.
Inspect for worn piston or seat in cover.
Replace piston and seat.
Step 4.
Check for valve setting too close to that of system operating pressure.
Set relief valve at least 150 psi (1034 kpa) higher than other valves in
circuit.
3-165
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