Table 7. Front Axle Troubleshooting Procedures.

TM 9-2320-312-24-1

TROUBLESHOOTING PROCEDURES - CONTINUED

0006 00

NOTE

For additional front axle troubleshooting, refer to Group 080 Commercial Service Manuals.

Table 7. Front Axle Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Front Wheels Shimmy or Vibrate.

1. Check for loose or missing

Replace missing lug nuts.

lug nuts at each wheel.

Retorque lug nuts to 500 lb-ft

(678 Nm).

Add gear lubricating oil (WP

2. Check front hub for proper

level of gear lubricating oil in

0008 00 and WP 0009 00). If

sight glass. Check for signs of

leaks are evident, replace hubcap

leaking

from

hubcap

assembly components (WP 0033

assembly.

00).

Adjust wheel bearings

3. Check for proper wheel

bearing adjustment at front

required (WP 0033 00).

axle.

Replace worn or damaged

4. Remove front wheels and

hubs. Inspect for excessively

components (WP 0033 00).

worn

damaged

components.

2. Hub Leaking Oil.

1. Inspect for oil on brakedrum.

Disassemble

wheel

hub

assembly and replace oil seal

(WP 0033 00).

Replace damaged components

2. Inspect for oil leaking at axle

hubcap assembly or hubcap

(WP 0033 00).

window vent plug.

Adjust tire pressure as required.

3. Rapid or Uneven Tire Wear.

Check air pressure in each front

tire. Air pressure should be 120

psi (827 kPa).

0006 00-24