SHOCK ABSORBER, Suspension

DESCRIPTION

DESCRIPTION

The top of the shock absorbers are bolted to the frame. The bottom of the shocks are bolted to the axle brackets.

OPERATION

OPERATION

The shock absorbers dampen jounce and rebound motion of the vehicle over various road conditions and limit suspension rebound travel.

DIAGNOSIS AND TESTING - SHOCK ABSORBER

DIAGNOSIS AND TESTING - SHOCK ABSORBER

A knocking or rattling noise from a shock absorber may be caused by movement between mounting bushings and metal brackets or attaching components. These noises can usually be stopped by tightening the attaching nuts. If the noise persists, inspect for damaged and worn bushings, and attaching components. Repair as necessary if any of these conditions exist.

A squeaking noise from the shock absorber may be caused by the hydraulic valving and may be intermittent. This condition is not repairable and the shock absorber must be replaced.

The shock absorbers are not refillable or adjustable. If a malfunction occurs, the shock absorber must be replaced. To test a shock absorber, hold it in an upright position and force the piston in and out of the cylinder four or five times. The action throughout each stroke should be smooth and even.

The shock absorber bushings do not require any type of lubrication. Do not attempt to stop bushing noise by lubricating them. Grease and mineral oil-base lubricants will deteriorate the bushing.

REMOVAL

REMOVAL

1. Raise and support the vehicle and the axle.

 
2. Remove the upper mounting bolts (1).
   
   

 
3. Remove the lower nut and bolt (2) from the axle bracket. Remove the shock absorber (1).
   

 

INSTALLATION

INSTALLATION

1. Install the shock absorber (2) on the upper frame rail and install mounting bolts (1).

 
2. Tighten the upper bolts (1) to 57 N·m (42 ft. lbs.).
   
   

 
3. Install lower bolt and nut (2) finger tight.

 
4. Remove the supports and lower the vehicle.

 
5. Tighten the lower nut to 88 N·m (65 ft. lbs.).