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 TM 55-1905-220-14-3
Table 3-68. Anchor Winch Engine Low or No Accumulator
Pressure Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
Engine driven pump fails to raise pressure.
Step 1.
Check for air in system.
To purge the engine driven pump of air:
a. Operate the engine at maximum no-load engine speed.
b. Break the hose connection (1) at the pressure side of the engine-driven pump until a full
stream of oil is discharged from the pump.
c.
Connect the hose to the pump and alternately loosen and tighten the swivel fitting (2) on
the pressure hose until oil leaking out, when the fitting is loose, appears free of air
bubbles.
d. Tighten the swivel fitting (2) securely and observe the pressure gage. The pressure
must rise rapidly to the accumulator precharge pressure (1250 psi at 70 F) then increase
slowly to 2900 to 3300 psi in 6 to 10 minutes, depending upon the size of the particular
accumulator.
e. If the accumulator pressure does not rise, make certain that the hand pump relief valve
(3) is closed after the pressure is released and repeat the above purging procedure.
3-206
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