TM 5-3805-281-24-1
Diagnostic Information
Symptom
Problem
Solution
Engine and pump controller
Check controller. See Group
9015-15.
Wiring harness
Check wiring harness. See Group
9015-15.
Coolant Temperature Too Low
Thermostat stuck open
Replace thermostat. See Engine
Repair chapter.
9010
15
Temperature gauge
Install new gauge or sending unit.
7
Oil In Coolant Or Coolant In
Oil cooler leaking
Test, repair. See Engine Repair
chapter.
Blown cylinder head gasket
Place end of radiator overflow hose
(between radiator and coolant
recovery tank) into a container of
clear water. Operate engine at fast
idle under a load. A constant flow of
bubbles indicates cylinder head
gasket leakage. Replace gasket.
See Engine Repair chapter.
Cylinder head cracked
Check, replace. See Engine Repair
chapter.
Liner packing leaking and/or cracked
Remove pan, inspect bottom end,
cylinder block
repair, verify and replace if
necessary. See Engine Repair
chapter.
Low Engine Oil Pressure
Oil level low
Fill to proper level.
Oil filter plugged
Install new oil filter and oil.
Oil pump intake screen plugged or
Clean or replace. See Engine Repair
loose
chapter.
Wrong grade of oil or fuel dilution
Use correct grade of oil. See Engine
Repair chapter.
Engine oil pressure regulating valve
Repair valve. See Engine Repair
chapter.
Continued on next page
CED,TX14795,4357
1917APR987/12
3-35