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 TM 55-1905-220-14-3
Table 3-79. Centralized Hydraulic System - Hydraulic
Power Unit Troubleshooting (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
Inspect for leaky tank.
Check all bolts, plugs and gaskets.
2.
Loss of fluid from pump.
Step 1.
Inspect for leaky pipe connections.
Check all lines and connections. Be sure no rubbing or excessive vibration is present.
Have system under pressure when looking for leaks.
Step 2.
Inspect for leaking gaskets.
Check all bolts clamping gasketed covers, while system is under pressure.
Step 3.
Inspect for leaking seals, cracked housing.
Refer to paragraph 3-189.
3.
Poor performance.
Step 1.
Check. for a dirty return oil filter.
Remove and replace element. Refer to paragraph 3-187.
Step 2.
Inspect for suction filter indicator showing a dirty filter.
Remove and, clean. Refer to paragraph 3-190.
Step 3.
Check for pump rotating slowly, motor running normal.
Defective flexible coupling. Refer to paragraph 3-188.
4.
Motor does not run.
Step 1.
Check for no power to motor.
a.
Reset circuit breaker.
3-220
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