Isuzu Cars and Trucks 1981-1991

Front Axle Shaft, Bearings and Seal

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REMOVAL AND INSTALLATION
Axle Shaft
  1. Raise and safely support the vehicle.
  2.  
  3. Disconnect the front driveshaft from the differential.
  4.  
  5. Remove the wheels and skid plate.
  6.  
  7. Loosen the torsion bar completely with the height control adjusting bolts.
  8.  
  9. Remove the strut bars.
  10.  
  11. Disconnect the stabilizer bars from the lower control arms.
  12.  
  13. Remove the caliper assemblies and wire them to the frame; do not disconnect the brake lines.
  14.  
  15. Remove the ball joints from the tie rods.
  16.  
  17. Disconnect the upper control arms from the frame; make sure to note the number and positions of the shims.
  18.  
  19. Remove the steering link ends from the lower control arms.
  20.  
  21. Disconnect the shock absorbers from the lower control arms.
  22.  
  23. Disconnect the lower control arms from the frame.
  24.  
  25. Remove the locking hub.
  26.  
  27. Remove the rotors and upper links.
  28.  
  29. Remove the pitman arm and idler arm along with the steering linkage assembly.
  30.  
  31. Support the differential housing and lower it clear of the vehicle. Take care to avoid damaging the Birfield joints.
  32.  
  33. Drain the differential case and remove the 4 bolts attaching the axle mounting bracket to the case.
  34.  
  35. Pull the shaft assemblies from the case on both sides.
  36.  

To install:

  1. Install the shaft assemblies into the case on both sides.
  2.  
  3. Raise the differential housing and install the 4 bolts attaching the axle mounting bracket to the case.
  4.  
  5. Install the pitman arm and idler arm along with the steering linkage assembly.
  6.  
  7. Install the rotors and upper links.
  8.  
  9. Install the locking hub.
  10.  
  11. Connect the lower control arms to the frame.
  12.  
  13. Connect the shock absorbers to the lower control arms.
  14.  
  15. Install the steering link ends to the lower control arms.
  16.  
  17. Connect the upper control arms to the frame; make sure to note the number and positions of the shims.
  18.  
  19. Install the ball joints to the tie rods.
  20.  
  21. Install the caliper assemblies.
  22.  
  23. Connect the stabilizer bars to the lower control arms.
  24.  
  25. Install the strut bars.
  26.  
  27. Tighten the torsion bar completely with the height control adjusting bolts.
  28.  
  29. Install the wheels and skid plate.
  30.  
  31. Connect the front driveshaft to the differential.
  32.  
  33. Lower the vehicle.
  34.  
  35. Check the level of the axle lubricant and bleed the brake system when finished.
  36.  



Click image to see an enlarged view

Fig. Exploded view of the front wheel assembly 2WD P'up shown



Click image to see an enlarged view

Fig. Exploded view of the front axle assembly 4WD



Click image to see an enlarged view

Fig. Exploded view of the front wheel assembly 2WD Amigo shown

Axle Shaft Seal
  1. Raise and safely support the vehicle. Remove the wheel assembly.
  2.  
  3. Remove the axle from the housing.
  4.  
  5. Remove the seal from the housing.
  6.  
  7. Clean and inspect the sealing surfaces of the housing and axle.
  8.  
  9. Using a seal installer tool, drive the new seal into the housing with the lip of the seal facing the housing.
  10.  

To install:

  1. Lightly coat the lip of the seal with oil and install the axle in the housing.
  2.  
  3. Install the seal to the housing.
  4.  
  5. Install the axle to the housing.
  6.  
  7. Install the wheels and lower the vehicle.
  8.  
  9. Check the level of the axle lubricant when finished.
  10.  

Axle Shaft Bearings
  1. Raise and safely support the vehicle.
  2.  
  3. Remove the axle shaft from the housing.
  4.  
  5. Support the axle shaft and remove the bearing retainer locknut and washer.
  6.  
  7. Remove the retainer, bearing and seal from the axle shaft.
  8.  

To install:

  1. Always replace the seal and lock washer when removing the axle shaft from the housing. Torque the bearing retainer nut to 188 and 19195 ft. lbs. (250 and 19320 Nm).
  2.  

Wheel Bearings
  1. Place the transfer case in 2H . Raise and safely support the vehicle.
  2.  
  3. Remove the free wheeling hub cover assembly.
  4.  
  5. Remove the snapring and shims from the spindle.
  6.  
  7. Remove the free wheeling hub body and lock washer.
  8.  
  9. Remove the outer roller bearing assembly from the hub with a finger.
  10.  
  11. Using a brass or wood drift, drive out the inner bearing assembly along with the oil seal. Replace the seal.
  12.  
  13. Wash all parts in a non-flammable solvent.
  14.  
  15. Check all parts for cracks or wear. Thoroughly lubricate all bearing parts with a high-temperature wheel bearing grease. Remove any excess. Apply about 2 ounces of the grease to the hub.
  16.  

To install:

  1. Lightly coat the spindle with the same grease.
  2.  
  3. Place the inner bearing into the hub race and install a new seal and retaining ring.
  4.  
  5. Carefully install the hub on the spindle and install the outer bearing.
  6.  
  7. Install the spindle nut.
  8.  
  9. While rotating the hub, tighten the hub so the wheel can just be turned by hand.
  10.  
  11. Turn the hub 2 and 193 turns and back off the nut just enough so it can be loosened with the fingers.
  12.  
  13. Finger-tighten the nut so all play is taken up at the bearing.
  14.  
  15. Attach a pull scale to a lug nut and check the amount of pull needed to start the wheel turning. Initial pull should be 2.6 and 194.0 lbs. When performing this test, make sure the brake pads are not touching the rotor. If the rotating torque is not correct, tighten the spindle nut until it is.
  16.  
  17. Install the snapring and shims, gasket and cover. Torque the cover bolts to 14 ft. lbs. (20 Nm).
  18.  

 
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