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 440 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

120.

BRAKES OVERHEAT (Continued).

Step 3.

Check for dragging brakes.

Adjust brakes (para 3-157).

Step 4.

Remove drum (para 3-204 thru 3-206), and inspect brake assembly.

Apply brakes lightly and observe shoe

movement for smooth operation.

Clean, repair, or replace defective components (para 3-158 thru 3-162).

Step 5.

Inspect wheel bearings for damage and proper lubrication.

Adjust, lube, or replace bearings (para 3-204 thru 3-207, as applicable).

121.

STOPLAMPS DO NOT OPERATE (BRAKES NORMAL).

Check for defective wiring or electrical connectors.

Refer to malfunction 56.

122.

PRESSURE GAGE(S) NOT INDICATING OR NOT ACCURATE (BRAKES NORMAL).

Step 1.

Disconnect affected air line(s) at gage(s), and press brake pedal.

If no air exhausts, the line is clogged or

broken.

Replace defective line or gage (para 3-163).

2-314