Nissan Pick-ups and Pathfinder 1989-1995

Front Axle Hub and Wheel Bearing

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REMOVAL & INSTALLATION



2wd Models

See Figures 1, 2, 3 and 4

Refer to the wheel bearing service and bearing preload adjustment procedures found inChapter 1.

  1. Raise the front of the truck and support it with safety stands. Remove the wheels.
  2.  
  3. Remove the brake caliper and suspend it with wire, out of the way. Remove the caliper torque plate if equipped.
  4.  
  5. Remove the dust cap and then remove the cotter pin, lock washer (if equipped) nut lock and nut.
  6.  
  7. Pull the hub/disc assembly off the spindle with the outer bearing. Don't let the bearing fall out.
  8.  
  9. Pry the inner oil seal out and remove the inner bearing.
  10.  

To install:
  1. Clean and inspect the bearings and outer races.
  2.  
  3. Using a brass drift and a hammer, drive out the bearing outer race. Press a new one into position.
  4.  
  5. Pack the bearings with grease until it oozes out the other side. Coat the inside of the hub and cap with grease.
  6.  
  7. Position the inner bearing into the hub, coat the oil seal with grease and press it into the hub.
  8.  
  9. Press the hub assembly onto the spindle and install the outer bearing and thrust washer.
  10.  
  11. Install the hub nut. Turn the hub a few times to seat the bearings and then loosen the nut until there is 0mm axial play. Using a spring tension gauge, check that the preload (with new grease seal installed) is 2.2-6.4 lbs. (9.8-28.4N)
  12.  
  13. Install the locknut, new cotter pin and hub grease cap.
  14.  
  15. Install the brake torque plate. Install the brake caliper.
  16.  
  17. Install the wheels and lower the truck.
  18.  

4wd Models

See Figure 5

The hub and bearing service procedures for a 4wd models are basically the same as those for a 2wd version, with the exception of removing the free running hub assembly and the bearing preload adjustment. Refer to Chapters 1 and Chapter 7 for additional information. Adjust the preload after the wheel bearing is replaced or the front axle assembly is reassembled.

BEARING PRELOAD ADJUSTMENT
  1. Thoroughly clean all parts and pack the wheel bearings.
  2.  
  3. Apply grease to threaded portions of the spindle, grease seal lip and wheel hub.
  4.  
  5. Tighten the wheel bearing locknut with a socket and torque wrench to 58-72 ft. lbs. (78-98 Nm).
  6.  
  7. Rotate the hub in both directions a few times to seat the bearings. Loosen wheel bearing locknut.
  8.  
  9. Retighten the locknut to 0.4-1.1 ft. lbs. (0.5-1.5 Nm).
  10.  
  11. Turn wheel hub several times in both directions.
  12.  
  13. Retighten the locknut to 0.4-1.1 ft. lbs. (0.5-1.5 Nm).
  14.  



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Fig. Fig. 1: Exploded view of the front axle assembly-2wd models



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Fig. Fig. 2: Removing the bearing outer races



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Fig. Fig. 3: Packing the wheel bearing with grease



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Fig. Fig. 4: Pack the lip cavity of grease seal with grease



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Fig. Fig. 5: Exploded view of the front axle assembly-4wd models

  1. Measure wheel bearing axial end-play. The wheel bearing end-play specification is 0.
  2.  
  3. Install lock washer by tightening the locknut within 15-30 degrees.
  4.  
  5. Turn wheel hub several times in both directions. Wheel bearing should be seated correctly.
  6.  
  7. If necessary, measure wheel bearing preload.
  8.  

Measure wheel bearing preload with a spring-type gauge; measure at wheel hub bolt, with tire removed. The hub assembly should rotate with 1.6-4.7 lbs. (0.73-2.13 kg) of pressure.

 
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