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 422 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

101.

EXCESSIVE SHAFT NOISE OR VIBRATION (Continued).

NOTE

Look for arrow marks on propeller shaft

and

slip

yoke.

Arrows

will point toward each other.

If marks

are not visible, punch mark in each member insuring reassembly in same relative position.

Step 6.

Remove propeller shaft from vehicle (para 3-144 or 3-145). Check freedom of motion of splines by moving

shaft from fully retracted to fully extended.

If excessive

force is required to retract or extend shaft, or it

does not reach full travel,

separate shaft halves and balance weight, and inspect splines for wear, damage,

and lubrication.

Replace shaft assembly, if required (para 3-144 or 3-145).

102.

EXCESSIVE BACKLASH.

Step 1.

Check all universal joints.

Lubricate and replace as necessary (para 3-144 or 3-145).

Step 2.

Check drive axle capscrews on universal joints for tightness.

Torque to 100-110 lb-ft (para 3-144 or 3-145).

If problem continues, notify direct support

maintenance.

103.

CONTINUOUS AXLE OR WHEEL NOISE.

Step 1.

Check lube level in axle housing.

Fill axle housing to proper level.

(Refer to LO 9-2320-283-12).

Step 2.

Check lube pump cover (forward rear axle) for visible damage.

Notify direct support maintenance.

2-296