Table 3-37. Hydrostarter - Loss of Accumulator Precharge (Nitrogen)

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Table 3-36. Hydrostarter - Starter Turns but Engine Does Not- Troubleshooting.

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

Table 3-38. Hydrostarter - High Pressure in System (3500 psi or above) - Troubleshooting.

TM 55-1905-219-14-3

Table 3-37. Hydrostarter - Loss of Accumulator Precharge

(Nitrogen) - Troubleshooting.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Loss of accumulator precharge (nitrogen).

Step 1.

Check for damaged seal ring on piston.

Some nitrogen precharge, but no fluid

pressure in the system, bubbles and

foaming in reservoir indicates that

nitrogen is leaking past the seal ring

on accumulator piston. Refer to

Direct Support Maintenance.

Step 2.

Check for defective air valve.

Release pressure in system by opening

relief valve on side of hand pump.

Loosen hex lock nut on nitrogen valve

approximately 3/4 turn to release

remaining precharge before attempting

to remove v alve from accumulator.

Replace the air valve. Refer to Direct

Support Maintenance.

Step 3.

Check for damaged seal ring between shell and end

cap.

Apply light oil on threaded end of accum-

ulator at end of the cap. Bubbling of the

oil indicates a leak past the end cap seal.

Refer to Direct Support Maintenance.

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