TM 9-2330-381-14
4-13.
TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
APU - CONT
10.
LOW OIL PRESSURE - CONT
Step 4.
Check for low compression and listen for compression leaks.
a. Check glow plug for looseness. Tighten or replace as
necessary (para. 4-97).
b. Check nozzle holder for looseness. Tighten or replace as
necessary (para. 4-102).
c.
Visually check for cracks in cylinder head and in engine
block. If any cracks are found, replace APU (para. 4-95).
11.
ENGINE OVERHEATING
Step 1.
Check for improper engine coolant mixture (para. 4-10) with
hydrometer (item 17, appx. B).
Add antifreeze or water as required (para. 4-110).
Step 2.
Visually check for dirt and debris in radiator or fan dynamo.
Clean and/or replace radiator and fan dynamo (para. 4-110 and
Step 3.
Visually check radiator cap for leakage and worn cap or gasket.
If any defects are found, replace radiator cap (para. 4-110).
Step 4.
Check inside of radiator and inspect coolant solution for
corrosion, rust, or discoloration.
Drain fluid from radiator (para. 4-110). Flush radiator and
check for internal corrosion and deterioration. If damaged,
replace radiator. Refill radiator with proper coolant mixture.
Step 5.
Check for loose or broken fan belt.
Adjust or replace fan belt (para. 4-111).
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