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 TM 55-1905-219-14-3
Table 3-34. Hydrostarter - Loss of Fluid Pressure When Engine
is Not Running - Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Loss of fluid pressure when engine is not running.
Step 1.
Check for ambient temperature decrease.
A drop in temperature will
decrease the nitrogen pressure.
Adjust the pressure as needed
for cranking requirements by
use of the hand pump.
Step 2.
Check engine driven pump check valves not holding.
Disconnect the return hose and
inlet hose from the engine-driven
pump. Leakage from the inlet fit-
ting means that both check valves
are defective. Leakage at the
return fitting means that only
outlet check valve is defective.
Replace the defective check valve
assembly(s). Refer to paragraph
3-103.
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
3-104.
Step 4.
Check for damaged seal ring in starter control
valve shown by external leakage.
Refer to Direct Support Maintenance.
3-121
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