TM 5-3805-280-24-1
Diagnostic Information
Symptom
Problem
Solution
Engine Will Not Stop When Key
Starter circuit isolating diode (V2)
Pull power on fuse (F5) to stop
Switch Is Turned OFF
shorted
engine. Replace start circuit isolation
diode. See Group 9015-10.
Engine Will Not Crank When Key
Start circuit isolation diode (V2) open
Replace start circuit isolation diode.
Switch Is Turned To Start
See Group 9015-10.
Position
Injection pump metering valve
Lightly tap injection pump housing. If
9010
15
sticking
engine now starts, repair metering
2
valve. See Local Fuel Injection
Pump Service Center.
Electric shut-off
Check shut-off solenoid. See Group
9015-10. Inspect solenoid wiring and
linkage. See your Local Fuel
Injection Pump Service Center.
Injection pump
Remove and test pump. See your
Local Fuel Injection Pump Service
Center.
Injection nozzle(s)
Remove and test nozzles. See
Engine Repair chapter.
Starter
Replace starter.
Worn compression rings or low
Check compression. Repair. See
compression
Engine Repair chapter.
Starting ether used excessively
Remove nozzles and add small
amount of oil to each cylinder. See
Engine Repair chapter.
Blown head gasket
Route tube between radiator and
overflow tank into container of fluid
and check for bubbles. Bubbles
indicate head gasket leakage. See
Engine Repair chapter.
Engine Knocks, Runs Irregularly
Air in fuel
Inspect filter for evidence of air in
or Stops
fuel. Tighten connections and bleed
fuel system.
Continued on next page
TX,9010,SB112 1929MAY982/12
3-29