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TM 11-1905-219-14-3
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) on 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 alternatelyloosen and tighten the
swivel fitting (2) on the pressure hose until the 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 ) (8274 kPa at 68.4 ). Then the pressure must
F
C
increase slowly to 2900 to 3300 psi (19996 to 22754 kPa) 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.
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