Table 3-31. Hydrostarter - Low or No Accumulator Pressure

Custom Search

Table 3-30. Generator Engine - Low or High Exhaust Valve Opening. Pressure Troubleshooting.

TM-55-1905-219-14-3 Landing Craft Utility (LCU) 1667 Class Boston Hull Numbers 1667-1670 NSN 1905-00-168-5764 Manual

Engine driven pump fails to raise pressure

TM 55-1905-219-14-3

Table 3-31. Hydrostarter - 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:

Operate the engine at maximum

no-load engine speed.

Break the hose connection (1)

on the pressure side of the

engine-driven pump until a

full stream of oil is dis-

charged from the pump.

Connect the hose to the pump

and alternately loosen 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.

Tighten the swivel fitting

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 increase slowly to 2900

to 3300 psi (19996 to 22754

kPa) in 6 to 10 minutes,

depending upon the size of

the particular accumulator.

3-114