Table 3-52. Anchor Winch - Hydraulic Tank Balanced

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Excessive pressure

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

Table 3-53. Anchor Winch - Hydraulic Tank Check Valves Troubleshooting

TM 55-1905-220-14-3

Table 3-52. Anchor Winch - Hydraulic Tank Balanced

Piston Relief Valves Troubleshooting (Cont).

NOTE

Refer to paragraph 3-137 for all maintenance procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Low pressure or no pressure.

Step 1.

Check for valve being improperly adjusted.

Adjust valve to proper setting.

Step 2.

Check if vent connection open.

Plug vent connection.

Step 3.

Check for plugged balance hole in piston.

Remove piston and clean out. If necessary, drain system and refill with clean fluid.

Step 4.

Inspect for piston in cover not seating.

Back off adjusting screw several turns while running pump to be certain foreign matter is not

caught on the seat. Check condition of seat, spring and piston if malfunction persists.

Excessive noise or chatter.

Step 1.

Check for high oil velocity through valve.

Check system.

Step 2.

Inspect for distorted control spring.

Replace spring.

Step 3.

Inspect for worn piston or seat in cover.

Replace piston and seat.

Step 4.

Check for valve setting too close to that of system operating pressure.

Set relief valve at least 150 psi i1034 kpa) higher than other valves in circuit .

3-159