Table 5-2. Direct Support Troubleshooting

TM 5-4210-233-14&P-1

Table 5-2. Direct Support Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

AUXILIARY POWER UNIT

APU ENGINE LOW POWER

Step 1. Check governor adjustment and linkage.

Adjust governor and/or replace linkage (see para 5-79).

Step 2. Check engine adjustments.

Check valve adjustment (see para 5-80), decompression release adjustment (see

para 5-73), injector opening pressure adjustment (see para 5-77), and injection pump

adjustment (see para 5-78).

Step 3. Test compression with gauge.

If compression is below 350 - 400 psi (2415 - 2760 kPa) at 1800 rpm, refinish or replace

valves and seats (see para 5-72), and/or replace piston rings (see para 5-74).

Step 4. Governor worn or damaged:

Repair governor (see para 5-79).

WATER PUMP AND PIPING

PUMP WILL NOT ENGAGE

Step 1. Check pump switch and shift linkage.

Step 2. Check power and ground connections at transmission lock up solenoids.

PUMP CASING LEAKS WATER WHILE PUMPING

Step 1. Check location of leak.

Repair pump as required (see para 6-6).

RADIATOR

OIL IN RADIATOR COOLANT

Sample radiator coolant and determine whether oil is from engine or transmission.

Overhaul engine or transmission as required (see Chapter 6).

5-6