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 TM 55-1905-220-14-3
Table 3-14.
Hydrostarter - Loss of Fluid Pressure When Engine is Not Running Troubleshooting (Cont).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
Loss of fluid pressure when engine is not running (Cont).
Step 2.
Check for engine driven pump check valves not holding.
Disconnect the return hose and inlet hose from the engine-driven pump. Leakage
from the inlet fitting means that both check valves are defective. Leakage at the
return fitting means that only out- let check valve is defective. Replace the defec-
tive check valve assembly(s). Refer to paragraph 3-48.
Step 3.
Check for hand pump valves not holding.
Disconnect the inlet hose from the hand pump. Leakage from the inlet fitting
means that either the relief valve alone or both the inlet and outlet check valves
are defective. Stone and clean the ball seats in the pump body and replace the
balls and springs if necessary. Refer to paragraph 3-49.
Step 4.
Check for damaged seal ring in starter control valve shown by external leakage.
Refer to Direct Support Maintenance.
Step 5.
Check for external leakage in system.
Examine all hoses and fittings for leaks.
Tighten. Refer to Direct Support
Maintenance.
Step 6.
Check for loss of accumulator precharge (nitrogen). See table 3-17.
3-67
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