Isuzu Cars and Trucks 1981-1991

Rear Wheel Bearings

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ADJUSTMENT
FWD I-Mark
  1. Raise the car and support it with jackstands.
  2.  
  3. Remove the hub dust cover and spindle cotter pin. Loosen the nut.
  4.  
  5. While spinning the wheel, snug the nut down to seat the bearings. Do not exert over 12 ft. lbs. of force on the nut.
  6.  
  7. Back the nut off 1 / 4 turn or until it is just lose. Line up the cotter pin hole in the spindle with the hole in the nut.
  8.  
  9. Insert a new cotter pin. Endplay should be between 0.03-0.13mm. If play exceeds this tolerance, the wheel bearings should be replaced.
  10.  



Click image to see an enlarged view

Fig. Exploded view of the rear wheel bearings FWD I-Mark

REMOVAL AND INSTALLATION

CAUTION
Some brake pads contain asbestos, which has been determined to be a cancer causing agent. Never clean the brake surfaces with compressed air! Avoid inhaling any dust from any brake surface! When cleaning brake surfaces, use a commercially available brake cleaning fluid.

  1. Raise the car and support it with jackstands. Remove the wheel.
  2.  
  3. Remove the dust cap, cotter pin, castle nut, thrust washer and outside wheel bearing. Pull the drum assembly from the spindle.
  4.  
  5. Pry out the inner seal and remove the inner bearing. If necessary to remove the inner bearing races, use a hammer and a brass drift to drive the bearing races from the hub.
  6.  
  7. Clean all parts in kerosene or equivalent, DO NOT use gasoline. After cleaning, dry the parts with compressed air and check parts for excessive wear and replace damaged parts. Do NOT allow the bearings to spin while blowing dry.
  8.  

To install:

  1. Smear grease inside of hub. Install the bearing races into hub, using a hammer and a brass drift. Drive the races in until they seat against the shoulder of the hub.
  2.  
  3. Pack the bearings with grease and install the inner bearing in the hub. Install a new grease seal, be careful not to damage the seal.
  4.  
  5. Install the drum assembly onto the spindle. Install the outer bearing, thrust washer and castle nut. Tighten the nut until the wheel does not turn freely.
  6.  
  7. Back off the nut until the wheel turns freely and install the cotter pin. Install the dust cap and lower the vehicle.
  8.  



Click image to see an enlarged view

Fig. Removing the bearing outer race with a brass drift

PACKING

Clean the wheel bearings thoroughly with solvent and check their condition before installation.


CAUTION
Do not blow the bearing dry with compressed air as this would allow the bearing to turn without lubrication.

Apply a sizable amount of lubricant to the palm of one hand. Using your other hand, work the bearing into the lubricant so that the grease is pushed through the rollers and out the other side. Keep rotating the bearing while continuing to push the lubricant through it.

FWD Impulse and Stylus

The rear hub and bearing assembly is a complete unit. It is not serviceable and has to be replaced as a complete unit.


CAUTION
Some brake pads contain asbestos, which has been determined to be a cancer causing agent. Never clean the brake surfaces with compressed air! Avoid inhaling any dust from any brake surface! When cleaning brake surfaces, use a commercially available brake cleaning fluid.

  1. Raise the vehicle and support with jackstands.
  2.  
  3. Remove the rear wheel, caliper and rotor as outlined in the Brakes section.
  4.  
  5. Remove the hub nut and washer, 4WD only.
  6.  
  7. Remove the hub retaining bolts and hub assembly.
  8.  

To install:

  1. Install the hub and retaining bolts. Torque the bolts to 49 ft. lbs. (69 Nm).
  2.  
  3. Install the hub nut and washer, 4WD only. Torque to 137 ft. lbs. (186 Nm).
  4.  
  5. Install the rear wheel, caliper and rotor as outlined in the Brakes section.
  6.  
  7. Lower the vehicle.
  8.  



Click image to see an enlarged view

Fig. Rear hub and bearing FWD Impulse and Stylus

 
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