TABLE 2-2. TROUBLESHOOTING - continued - TM-55-1905-223-24-30059

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TABLE 2-2. TROUBLESHOOTING - continued

TM-55-1905-223-24-3 Ship s Service Generator for Landing Craft Utility (LCU) NSN 1905-01-154-1191 Manual

TABLE 2-2. TROUBLESHOOTING - continued

TM 55-1905-223-24-3

Table 2-2. Troubleshooting-Cont

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

g. Visually inspect the cylinder block for cracks or porosity, or crevice seal area.

h. Install a new gasket and the lubricating oil pan (para. 3-21).

i. Fill the engine with clean lubricating oil (L0 55-1905-223-12).

NOTE

Make sure the oil drain plug is tight.

Operate the engine until it reaches a temperature of 180 (80 ), and check for coolant or lubricating oil

leaks.

STEP 2. Check if lubricating oil cooler is malfunctioning. Repair or replace oil cooler (para. 2-34).

13. Fuel in the lubricating oil.

STEP 1. Check for low oil and coolant temperature caused by long periods of engine idling as ollows:

a. Turn engine OFF (TM 55-1905-223-10) rather than idling for long periods. If long idle necessary,

temporarily increase idle speed.

b. With engine running, use a tachometer to check the idle speed. It should be between 650 and 725 rpm.

c. Stop the engine (TM 55-1905-223-10).

d. Remove the cover plug for the idle speed adjusting screw (para. 2-33).

e. Operate the engine at high idle for 30 seconds.

f. Adjust the idle speed with the adjusting screw.

g. Install the cover plug to the adjusting screw.

STEP 2.

Check if top injector O-ring is damaged.

Check the injectors. Replace if necessary (para. 2-40).

STEP 3.

Check injector plunger.

Replace the injector or plunger (para. 2-40).

STEP 4.

Check if injector adapter wall is damaged behind balance orifice.

Replace the injectors (para. 2-40).

STEP 5.

Check for damaged fuel pump main shaft seals.

Replace the fuel pump (para. 2-37).

STEP 6.

Check for a defective cylinder head.

Refer to Malfunction 3, Step 5.

2-34