Table 3-74. Anchor Winch Engine - Hydrostarter Loss of Accumulator Precharge (Nitrogen) Troubleshooting (Cont).

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TM-55-1905-220-14-3 Landing Craft Unit LCU 1671-1679 (1905-01-009-1056) Manual

Table 3-75. Anchor Winch Engine - Hydrostarter High Pressure in System (3500 psi or above) Troubleshooting

TM 55-1905-220-14-3

Table 3-74. Anchor Winch Engine - Hydrostarter

Loss of Accumulator Precharge (Nitrogen) Troubleshooting (Cont).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Loss of accumulator precharge (nitrogen) (Cont).

Step 2.

Check for defective air valve.

Release the pressure in the system by opening the relief valve on the side of the hand

pump. Then, loosen the hex lock nut on the nitrogen valve approximately 3/4 turn to

release the remaining precharge before attempting to remove the valve from the

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 the threaded end of the accumulator at the end of the cap. Bubbling of

the oil indicates a leak past the end cap seal. Refer to Direct Support Maintenance.

Step 4.

Check for defective safety fuse.

Replace safety fuse assembly after releasing all nitrogen pressure.

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