Unit Mechanical Troubleshooting - continued

TM 9-2320-386-24-1-1

0010 00

Unit Mechanical Troubleshooting (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 1. Check for dirt/grit.

a. Replace transmission internal oil filter (WP 0143 00).

b. Replace transmission external oil filter (WP 0142 00).

c. Replace transmission. Notify direct support maintenance.

Step 2. Check for excessive foaming.

Ensure transmission fluid is at proper level (TM 9-2320-386-10). Drain or fill fluid as

necessary (WP 0023 00).

Step 3. Check radiator for contamination.

Replace radiator if contaminated (WP 0069 00).

END OF TESTING!

DIFFERENTIAL

32. DIFFERENTIAL NOISY

Step 1. Check to see if front wheel drive is engaged.

Disengage front wheel drive when traveling on hard, flat surfaces.

Step 2. Check lubrication level in axle housing differential (WP 0023 00). If low, fill to proper oil

level (WP 0023 00).

Step 3. Check for loose inner wheel adapter nuts or loose lugnuts.

a. If inner wheel adapter nuts are loose, tighten 425-475 lb-ft (576-644 Nm).

b. If wheel stud nuts are loose, tighten hollow wheel stud nut 275-300 lb-ft (373-407 Nm)

and other nine wheel stud nuts 390-420 lb-ft (529-569 Nm).

Step 4. Check for loose or damaged wheel bearings. Raise wheel off ground, using prybar, check for

excessive play.

a. Adjust wheel bearings (TM 9-2320-361-20).

b. If damaged, replace wheel bearings (TM 9-2320-361-20).

Step 5. Check differential operation. Remove differential propeller shaft(s) (WP 0146 00). Raise

wheels (TM 9-2320-386-10) and manually turn wheels and observe differential operation.

a. If tires will not rotate, check brakeshoe condition and operation (TM 9-2320-361-20).

b. Remove brakedrums (TM 9-2320-361-20). If brake system components are defective,

repair or replace (TM 9-2320-361-20, or notify direct support maintenance).

c. If tires still will not rotate, notify direct support maintenance.

d. If tire rotation drags at some points during full rotation, remove and inspect axle shafts

(TM 9-2320-361-20).

e. If axle shafts are defective, replace (TM 9-2320-361-20).

END OF TESTING!

33. DIFFERENTIAL CLUNKS DURING TURNS OR INITIAL TAKEOFF

Step 1. Check condition of differential propeller shaft(s) and universal joint(s) (WP 0148 00 and

WP 0149 00).

Repair or replace defective components (WP 0148 00 and WP 0149 00).

Step 2. Check front axle shafts and universal joints for defects (TM 9-2320-361-20).

Repair or replace defective components (TM 9-2320-361-20).

Step 3. If internal problems in differential exist, notify direct support maintenance.

END OF TESTING!

0010 00-11