Table 2-2. Troubleshooting - TM-55-1905-223-24-50049

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Table 2-2. Troubleshooting

TM-55-1905-223-24-5 Bowthruster Engine for Landing Craft Utility (LCU) NSN 1905-01-154-1191 Manual

FIGURE 2-1. Oil Cooler Bypass Valve

TM 55-1905-223-24-5

Table 2-2. Troubleshooting-CONT

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

STEP 6. Check for incorrectly installed or leaking, cylinder head, water pump, oil cooler, and thermostat

housing gaskets.

Install new gaskets as required (paras. 2-40, 2-29, 2-30, and 2-24, respectively).

STEP 7. Check for leaking lubricating oil cooler.

a. Tighten capscrews (para. 2-30).

b. Replace oil cooler (para. 2-30).

STEP 8. Check for leaking water pump seal. Replace water pump (para. 2-29).

5. Loss of engine coolant (internal leakage).

STEP 1. Check fresh water for oil contamination. Replace damaged coolant hoses and tubings.

STEP 2. Check for leaking lubricating oil cooler core. Replace oil cooler core (para. 3-14).

6. Low lubricating oil pressure.

STEP 1. Check for incorrect oil level. Add engine oil to proper level.

STEP 2. Check oil pressure gauge for malfunction. Replace oil pressure gauge (para. 2-22).

STEP 3. Check for fuel diluted oil. Refer to Malfunction 13.

STEP 4. Check for incorrect oil specifications. Change oil (LO 55-1905-223-12).

STEP 5. Check for oil temperature above normal 250 . Refer to Malfunction 8.

STEP 6. Check for broken oil transfer or suction tube. Replace tubes and fittings (para. 2-44).

STEP 7. Check for plugged oil cooler core.

a. Visually inspect the cooler core for plugged or damaged tubes.

b. Replace oil cooler core (para. 2-30).

7. High lubricating oil pressure.

STEP 1. Check for incorrect oil.

Change oil (LO 55-1905-223-12).

2-29