Isuzu C-240PW-28, Technical Manual, Page: 36 / 235

ARMY TM 9-2815-254-24
AIR FORCE TO 30G1-94-2
Table 3-2. Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
15.
ENGINE MAKES A GAS LEAKING NOISE.
Step 1.
Check for loose or damaged exhaust manifold.
a. Inspect for damaged and attaching hardware. IF not damage or loose, do step 2.
b. Tighten or replace exhaust manifold. Refer to paragraph 3-21.3.
Step 2.
Check for loose fuel injection nozzle and/or glow plugs.
a. lnspect fuel injection nozzles and glow plus for looseness. lf not loose, do step 3.
b. lf loose, replace washers and tighten injection nozzles (paragraph 3-10) and/or glow plugs
(paragraph 3-22.4).
Step 3. Check for damage cylinder head gasket.
a. lnspect area around cylinder head gasket for evidence of gas leakage.
b. Remove cylinder head and replace gasket. Refer to paragraph 3-27.
16.
DETONATION OR PRE-IGNITION
Step 1.
Step 2.
Step 3.
Improper fuel injection pump timing.
a Adjust fuel injection pump timing. Refer to paragraph 3-13. lf timing is correct, proceed to
Step 2.
Defect fuel injector nozzles.
a Test fuel injection nozzles. Refer to paragraph 3-10. lf fuel injection nozzles is not defective,
proceed to Step 2.
b. Replace fuel injection nozzles. Refer to paragraph 3-10.
Carbon build-up in compression chamber.
a. Remove cylinder head and inspect for carbon build-up. Refer to paragraphs 3-27 and 3-32.
b. Remove carbon and/or replace components as necessary.
17. BATTERY CHARGE AMMETER SHOWS CHARGE WHEN BATTERIES ARE LOW.
Step 1. Check for broken or loose fan belt.
a Inspect fan belt. Refer to end item maintenance manual. If belt not loose or broken, do step
2.
b. Adjust or replace fan belt. Refer to end item maintenance manual.
Step 2. Test for defective battery charging alternator.
a Inspect and test battery charging alternator. Refer to paragraph 3-24.1. If alternator not de
fective, do step 3.
b. Repair or replace battery charging alternator. Refer to paragraph 3-24.
Step 3. Check for breaks or loose connections in charging circuit.
if breaks or loose connections are found, repair charging circuit. Refer to end item mainte-
nance manual.
3-10 Change 1