TM 9-2320-289-20
Table 2-3. Mechanical Troubleshooting (Con’t)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 5.
Check for contaminated fuel by draining fuel from fuel filter draincock into suitable
container. Check color of fuel to determine if the correct fuel is in fuel system.
Drain fuel and replace if contaminated or incorrect fuel is in fuel system.
WARNING
Diesel fuel is flammable. When disconnecting fuel lines to test fuel flow,
direct fuel spray away from source of ignition. A fire extinguisher must be
on hand in work area. Failure to follow this warning may result in serious
injury or death to personnel.
Step 6.
Check fuel pump operation. Disconnect input fuel line at the fuel filter. Disconnect
pink lead from fuel injector pump. Use a quart capacity container, and crank
engine for 15 seconds. Container should be at least ¼ full or contain ½ pt (0.231)
of fuel. Install low pressure gage in fuel line. Crank engine for 15 more seconds.
Fuel pressure should be 5.5-6.5 psi (38-45 kPa). Reconnect fuel inlet line to fuel
filter, and reconnect pink lead to fuel injector pump.
If fuel flow is insufficient, replace fuel pump. (See paragraph 3-10)
Step 7.
Bleed fuel filter. (See paragraph 3-17)
16. HIGH-PITCHED WHINE FOLLOWING STARTUP
Step 1.
Check starter mounting bolts for looseness.
Tighten any loose mounting bolts to 33 Ib.-ft. (45 N•m).
Step 2.
Check clearance between starter pinion tooth and flywheel. (See paragraph 4-5,
INSTALLATION)
If condition still exists, replace starter. (See paragraph 4-5)
17. ACCELERATOR PEDAL STICKS OR FULL THROTTLE CANNOT BE OBTAINED
Step 1.
Inspect accelerator pedal components for binding or damage that would limit pedal
travel.
Replace components if required. (See paragraph 3-24)
Step 2.
Inspect accelerator cable and control spring on left side of injection pump for
damage that would restrict cable movement.
Replace cable or spring if damaged. (See paragraph 3-23)
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