Table 11. Differential Troubleshooting Procedures.

TM 9-2320-361-24-1

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MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd)

Table 10. Propeller Shaft Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Inspect propeller shaft for foreign Clean foreign material from

PROPELLER SHAFT

material or damage.

propeller shaft, or replace if

VIBRATION

damaged (WP 0139 00).

2. Inspect propeller shaft for loose

If any screws are loose, tighten

screws.

(WP 0139 00).

3. Check universal joints for play or Repair or replace U-joint

(WP 0141 00).

looseness. If rust is visible

around U-joint, disassemble and

inspect (WP 0141 00).

4. Remove U-joint, disassemble, and Replace U-joint if damaged

(WP 0141 00).

inspect (WP 0141 00).

Table 11. Differential Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Check to see if front wheel drive

Disengage front wheel drive when

1. DIFFERENTIAL NOISY

is engaged.

traveling on hard, flat surfaces.

2. Check lubrication level in axle

If low, fill to proper oil level

housing differential

(WP 0020 00).

1. If inner wheel adapter nuts are

3. Check for loose inner wheel

loose, tighten 400425 lb-ft

adapter nuts or loose lugnuts.

(542576 Nm).

2. If lugnuts are loose, tighten

325355 lb-ft (441481 Nm).

1. Adjust wheel bearings if loose

4. Check for loose or damaged

(WP 0189 00).

wheel bearings. Raise wheel off

ground. Use prybar to check for

2. If damaged, replace wheel

excessive play.

bearings (WP 0187 00 or

WP 0188 00).

1. If tires will not rotate, check

5. Check differential operation.

brakeshoe condition and

Remove differential propeller

operation (WP 0167 00).

shaft(s) (WP 0139 00). Raise

wheels (TM 9-2320-361-10),

2. Remove brake drums (WP 0187 00

manually turn wheels, and

and WP 0188 00). If brake system

observe differential operation.

components are defective, repair

or replace as necessary

(WP 0167 00 WP 0176 00).

3. If tires still will not rotate,

replace differential

(WP 0454 00).

4. If tire rotation drags at some

points during full rotation,

remove and inspect axle shafts

(WP 0142 00 or WP 0147 00).

5. If axle shafts are defective,

replace (WP 0142 00 or

WP 0147 00).

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