ENGINE DRIVEN PUMP FAILS TO RAISE PRESSURE.

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EXCESSIVE VIBRATION IN PROPELLER SHAFT.

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

LOSS OF FLUID FROM RESERVOIR

TM 55-1905-221-14-1

Table 4-1. Troubleshooting (Continued).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 5. Check to see if starter brushes are worn.

Replace any worn brushes.

12. ENGINE DRIVEN PUMP FAILS TO RAISE PRESSURE.

Step 1. Check fluid level.

a. Add fluid as necessary.

b. If fluid level is sufficient, go to Step 2.

Step 2. Check for air in system.

a. Purge system (para 4-35).

b. If no air is in the system, go to Step 3.

Step 3. Check to see if filter is plugged.

a. Clean filter (para 4-35).

b. If filter is clean, go to Step 4.

Step 4. Check to see if check valves are functioning properly.

Open the relief valve on the side of the hand pump while the engine is running. This permits the

engine driven pump to wash the check valve free of particles. If the accumulator can be charged with

the hand pump but not with the engine driven pump, then a check valve in the engine driven pump is

defective. Replace a faulty check valve assembly.

13. CRANKING SPEED TOO LOW.

Step 1. Check system fluid viscosity.

Use specified fluid.

Step 2. Check viscosity of engine crankcase oil.

Use proper grade oil as specified in lubrication order.

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