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 165 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-10.

TROUBLESHOOTING SYMPTOM INDEX.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

7

GRADUAL LOSS OF POWER (Continued).

Step 5

Check for dirt and water in fuel.

Replace water separator fuel filter, and clean fuel filter

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

8

LOW OR NO ENGINE OIL PRESSURE.

Step 1

Check for defective engine oil pressure gage.

Refer to malfunction 31, steps 1 and 12.

Step 2

Check for defective engine oil pressure sending unit.

Refer to malfunction 31, step 12.

Step 3

Notify direct support maintenance.

9

EXCESSIVE EXHAUST SMOKE DURING ACCELERATION.

Step 1

Check for black or gray exhaust smoke.

a

Clear blockage from air intake.

b

Clean air cleaner element.

c

Repair air crossover leaks or replace turbocharger air

crossover connection (para 3-31).

d

Notify direct support maintenance.

Step 2

Check for blue exhaust smoke If exhaust is blue, check

maintenance log for excessive oil usage.

Notify direct support maintenance.

2-40