RAMP CONTINUES TO LOWER WITH CONTROL VALVE IN NEUTRAL

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LOSS OF OIL

TM-55-1905-221-14-1 Landing Craft Mechanized Steel DED Overall Length 74 Feet Mod 1 Mark VIII Navy Design LCM-8 Manual

NOISY OPERATION OF PUMP

TM 55-1905-221-14-1

Table 4-1. Troubleshooting (Continued).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 6. Check foreign material in system.

Flush system completely and clean filter and strainer.

Step 7. Check counterbalance valve to see if it is correctly adjusted.

Adjust counterbalance valve.

31. RAMP CONTINUES TO LOWER WITH CONTROL VALVE IN NEUTRAL.

Step 1. Check to see if ball valve is open.

Close ball valve.

Step 2. Check counterbalance valve.

Notify your supervisor of a defective counterbalance valve.

32. UNUSUALLY SLOW RAMP OPERATION.

Step 1. Check if ball valve is open.

Close ball valve.

Step 2. Check engines are up to speed.

Increase engine speed.

Step 3. Check only one pump is engaged.

Engage both pumps.

Step 4. Check pump or motor.

Notify your supervisor of defective pump or motor.

Step 5. Check for restriction in lines.

Notify your supervisor.

Step 6. Check relief valve setting.

Notify your supervisor.

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