Engine Will Not Crank; Starter Operates But Engine Does Not Turn Over; Engine Cranks But Fails To Start - Isuzu C-240PW-28 Technical Manual

ARMY TM 9-2815-254-24
AIR FORCE TO 38G1-94-2
1.

ENGINE WILL NOT CRANK

Step 1.
Step 2.

STARTER OPERATES BUT ENGINE DOES NOT TURN OVER.

2.
Step 1.
Step 2.
3 .

ENGINE CRANKS BUT FAILS TO START

Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
3-4
TABLE 3-2 Troubleshooting
Check for defective end item starting system.
Troubleshooting per end item maintenance manual. lf not defective, do step 2.
Check for defective starter motor and solenoid.
a Test starter and solenoid. Refer to paragraph NO TAG
b. Repair/replace defective starter and/or solenoid. Refer to paragraph 3-23.
Check for worn or broken starter pinion gear and/or flywheel ring gear.
a . Remove starter and inspect pinion gear and flywheel ring gear for damage.
b . Replace defective clutch assembly and/or flywheel ring gear. Refer to paragraphs 3-23 and
3 - 3 1 .
Crankshaft rotation restricted. Attempt to manually rotate engine. If unable to manually rotate,
repair/replace engine.
Check for fuel being supplied to fuel injection pump.
a . Test feed pump capacity. Refer to paragraph NO TAG. If feed pump not defec-
tive, do step 2.
b. Repair or replace fuel feed pump. Refer to paragraph 3-11.
Check for dogged fuel filter/water separator.
a Remove and dean fuel filter Assembly, paragraph 3-9. If dean, replace water separator, re-
fer to end item maintenance manual.
Check for air in fuel system lines.
Bleed fuel system. Refer to paragraph 3-12. If fuel system is free air, do step 4.
Check for fuel injector starling pressure too Iow or spray condition improper.
a Remove, dean and test fuel injector. Refer to paragraph 3-10. Adjust as necessary, if injector
can not be adjusted, go to b. If not defective, do step 5.
b. Replace fuel injector. Refer to paragraph 3-10.
Check for improper fuel inject pump timing.
a. Check fuel injection pump timing. Refer to paragraph 3-13.1. If fuel injection pump timing is
correct, do step 6.
b. Adjust fuel injection pump timing. Refer to paragraph 3-132.
Check for defective fuel injection pump.
a. Remove and test fuel injection pump. Refer to paragraph NO TAG.
b. Repair or replace defective fuel injection pump. Refer to paragraph 3-11.