TM-9-2320-283-20-1

TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3

DECEMBER 1983

TM-9-2320-283-20-1 - Page 161 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-10.

TROUBLESHOOTING SYMPTOM INDEX.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ENGINE

1.

ENGINE FAILS TO CRANK.

Check electrical system.

a.

Troubleshoot starting system.

(Refer to malfunction 20).

b.

Notify direct support maintenance.

2.

ENGINE CRANKS BUT FAILS TO START.

Step 1.

Check for leaking or broken fuel lines.

Tighten connections, or replace fuel lines (para 3-28 or 3-36).

Step 2.

Check fuel specifications for cold weather operation.

(Refer to TM 9-2320-283-10).

Replace fuel, if necessary.

Step 3.

Turn ignition switch on and off, while assistant listens for

clicking sounds at fuel solenoid valve.

Replace or repair fuel solenoid valve (para 3-33).

Step 4.

Check for dirt and water in fuel.

Replace water separator fuel filter, and clean fuel filter

screen (para 3-27 and 3-37).

Step 5.

Check exhaust system for damage or blockage.

a.

Replace damaged portion of exhaust system (para 3-45 thru 3-49).

b.

Clear blockage from exhaust system.

2-36