Unit Mechanical Troubleshooting - continued

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

0010 00

Unit Mechanical Troubleshooting (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

34. DIFFERENTIAL VIBRATES

Step 1. Check conditions of tires and rims. Repair or replace defective components (WP 0174 00).

Step 2. Complete troubleshooting malfunction 32, steps 1 and 2.

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

END OF TESTING!

35. DIFFERENTIAL LEAKS OIL AT BRAKEDRUM

Check condition of axle seals. Inspect drum for presence of gear oil.

If gear oil is present in or around drums, replace axle seals (WP 0152 00).

END OF TESTING!

36. DIFFERENTIAL LEAKS OIL AT COMPANION FLANGE

Step 1. Check through-shaft for free play.

Place end of prybar between differential housing and companion flange. Apply pressure to

prybar.

Step 2. If companion flange moves, notify direct support maintenance.

END OF TESTING!

WHEELS AND TIRES

NOTE

A broken radial belt will cause symptoms as outlined in malfunctions 37,

38, 40, and 42.

37. UNEVEN TIRE WEAR

Step 1. Check for loose or missing wheel stud nuts and wheel studs.

a. Tighten wheel stud nut on hollow stud 275-300 lb-ft (373-407 Nm) and wheel stud nuts

390-420 lb-ft (529-569 Nm).

b. Replace missing wheel stud nuts and/or wheel studs (WP 0173 00 or WP 0172 00).

Step 2. Check for improper toe-in adjustment if wear is on front tires.

Adjust toe-in (WP 0179 00).

Step 3. Check wheel bearings for proper adjustment and damage. Raises wheel off ground.

Use prybar to lift up on bottom of tire. Excessive play indicates improperly adjusted or

damaged bearings.

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

b. Replace damaged bearings (TM 9-2320-361-20).

c. Check tires are inflated properly (TM 9-2320-386-10).

END OF TESTING!

38. WHEEL SHIMMY OR WOBBLE

Step 1. Inspect wheels for bends and damage.

Replace bent or damaged wheels (WP 0174 00).