Front Wheel Bearings

REMOVAL & INSTALLATION

Navajo and 1994–97 B Series Pick-up Models (Rear Wheel Drive)

1. Raise and support the vehicle safely. Remove the tire and wheel assembly from the hub and rotor.
2. Remove the caliper from its mounting and position it to the side with mechanics wire in order to prevent damage to the brake line hose.
3. Remove the grease cap from the hub. Remove the cotter pin, retainer, adjusting nut and flatwasher from the spindle.
4. Remove the outer bearing cone and roller assembly from the hub. Remove the hub and rotor from the spindle.

   Fig. 1: Remove the nut and washer from the spindle . . .

   Fig. 2: . . . then remove the outer bearing

   Fig. 3: Pull the hub and rotor assembly from the spindle

5. Using seal removal tool 1175-AC or equivalent remove and discard the grease seal. Remove the inner bearing cone and roller assembly from the hub.
6. Clean the inner and outer bearing assemblies in solvent. Inspect the bearings and the cones for wear and damage. Replace defective parts, as required.

   Fig. 5: With the seal removed, the inner bearing may be withdrawn from the hub

7. If the cups are worn or damaged, remove them with front hub remover tool T81P-1104-C and tool T77F-1102-A or equivalent.
8. Wipe the old grease from the spindle. Check the spindle for excessive wear or damage. Replace defective parts, as required.

   To install:

9. If the inner and outer cups were removed, use bearing driver handle tool T80-4000-W or equivalent and replace the cups. Be sure to seat the cups properly in the hub.
10. Use a bearing packer tool and properly repack the wheel bearings with the proper grade and type grease. If a bearing packer is not available work as much of the grease as possible between the rollers and cages. Also, grease the cone surfaces.

    Fig. 6: Thoroughly pack the bearing with fresh, high temperature wheel bearing grease

11. Position the inner bearing cone and roller assembly in the inner cup. A light film of grease should be included between the lips of the new grease retainer (seal).
12. Install the retainer using the proper installer tool. Be sure that the retainer is properly seated.

    Fig. 7: Apply a thin coat of fresh grease to the new seal lip

    Fig. 8: Use a suitably sized driver to install the inner bearing seal to the hub

13. Install the hub and rotor assembly onto the spindle. Keep the hub centered on the spindle to prevent damage to the spindle and the retainer.
14. Install the outer bearing cone and roller assembly and flatwasher on the spindle. Install the adjusting nut. Adjust the wheel bearings.
15. Install the retainer, a new cotter pin and the grease cap. Install the caliper.
16. Lower the vehicle and tighten the lug nuts to 100 ft. lbs. Before driving the vehicle pump the brake pedal several times to restore normal brake pedal travel.

    CAUTION
    Retighten the wheel lug nuts to specification after about 500 miles of driving. Failure to do this could result in the wheel coming off while the vehicle is in motion possibly causing loss of vehicle control or collision.

Navajo and 1994–97 B Series Pick-up Models (4-Wheel Drive)

WITH MANUAL LOCKING HUBS

1. Raise the vehicle and install jackstands.
2. Remove the wheel and tire assembly.
3. Remove the retainer washers from the lug nut studs and remove the manual locking hub assembly from the spindle.
4. Remove the snapring and spacer from the end of the spindle shaft.
5. Remove the outer wheel bearing locknut from the spindle using 4 prong spindle nut spanner wrench, T86T-1197-A or equivalent. Make sure the tabs on the tool engage the slots in the locknut.
6. Remove the locknut washer from the spindle.
7. Remove the inner wheel bearing locknut from the spindle using 4 prong spindle nut spanner wrench, T86T-1197-A or equivalent. Make sure the tabs on the tool engage the slots in the locknut.
8. Remove the outer bearing cone and roller assembly from the hub. Remove the hub and rotor from the spindle.
9. Using seal removal tool 1175-AC or equivalent remove and discard the grease seal. Remove the inner bearing cone and roller assembly from the hub.
10. Clean the inner and outer bearing assemblies in solvent. Inspect the bearings and the cones for wear and damage. Replace defective parts, as required.
11. If the cups are worn or damaged, remove them with front hub remover tool T81P-1104-C and tool T77F-1102-A or equivalent.
12. Wipe the old grease from the spindle. Check the spindle for excessive wear or damage. Replace defective parts, as required.

    Fig. 10: Before beginning the wheel bearing removal, and after the outer hub is removed, wipe off any excess grease

    Fig. 11: After the grease is wiped off, remove the axle shaft snapring . . .

    Fig. 12: . . . then pull the splined spacer from the axle shaft end

    Fig. 13: Use a 4 pronged socket to loosen the outer wheel bearing locknut . . .

    Fig. 14: . . . then remove the outer locknut

    Fig. 15: Remove the lockwasher from behind the outer locknut . . .

    Fig. 16: . . . then loosen and remove the inner locknut — note the lockwasher engagement pin (arrow)

    Fig. 17: While pushing inwards on the rotor/hub assembly, remove the outer wheel bearing . . .

    Fig. 18: . . . then pull the rotor/hub assembly from the spindle, taking care not to scratch the bearing cups in the hub

    Fig. 19: Pry out the grease seal on the back of the rotor/hub assembly . . .

    Fig. 20: . . . then remove the inner wheel bearing. Thoroughly clean and inspect all of the parts for wear or damage

    To install:

13. If the inner and outer cups were removed, use bearing driver handle tool T80-4000-W or equivalent and replace the cups. Be sure to seat the cups properly in the hub.
14. Use a bearing packer tool and properly repack the wheel bearings with the proper grade and type grease. If a bearing packer is not available work as much of the grease as possible between the rollers and cages. Also, grease the cone surfaces.
15. Position the inner bearing cone and roller assembly in the inner cup. A light film of grease should be included between the lips of the new grease seal.
16. Install the grease seal by driving in place with hub seal replacer tool T83T-1175-B and Driver Handle T80T-4000-W.
17. Install the hub and rotor assembly onto the spindle. Keep the hub centered on the spindle to prevent damage to the spindle and the retainer.
18. Install the outer bearing cone and roller assembly
19. Carefully install the rotor onto the spindle. Install the outer wheel bearing in the rotor.
20. Install the inner adjusting nut with the pin facing out. Tighten the inner adjusting nut to 35 ft. lbs. (47 Nm) to seat the bearings.
21. Follow the appropriate wheel bearing adjustment procedures.

    Fig. 21: After packing the bearing with grease, position a new seal to the rotor/hub assembly . . .

    Fig. 22: . . . then, using the correct seal installer, drive the seal into the rotor/hub until it is fully seated

    Fig. 23: Ensure that the pin on the inner locknut engages one of the holes of the lock washer

    Fig. 24: Tighten the outer wheel bearing locknut to specification

    Fig. 25: Install the splined axle shaft spacer then the snapring

WITH AUTOMATIC LOCKING HUBS

1. Raise the vehicle and install jackstands.
2. Remove the wheel and tire assembly.
3. Remove the retainer washers from the lug nut studs and remove the automatic locking hub assembly from the spindle.
4. Remove the snapring and spacer from the end of the spindle shaft.

   Fig. 26: Exploded view of the locking cam, thrust washers, locking key and bearing adjuster nut

   Fig. 27: Remove the wheel bearing adjusting nut after removing the locking key from under it

5. Pull the locking cam assembly and the two plastic spacers off of the wheel bearing adjusting nut.
6. Use a magnet and remove the locking key from under the adjusting nut. If required, rotate the adjusting nut slightly to relieve pressure against the locking key.

   WARNING
   To prevent damage to the adjusting nut and spindle threads on vehicles equipped with automatic hubs, look into the spindle keyway under the adjusting nut and remove the separate locking key before removing the adjusting nut.

7. Remove the wheel bearing locknut using a 2- ³⁄₈ inch (60.3mm) hex socket, such as Hex Locknut Wrench T70T-4252-B.
8. Remove the outer bearing cone and roller assembly from the hub. Remove the hub and rotor from the spindle.
9. Using seal removal tool 1175-AC or equivalent remove and discard the grease seal. Remove the inner bearing cone and roller assembly from the hub.
10. Clean the inner and outer bearing assemblies in solvent. Inspect the bearings and the cones for wear and damage. Replace defective parts, as required.
11. If the cups are worn or damaged, remove them with front hub remover tool T81P-1104-C and tool T77F-1102-A or equivalent.
12. Wipe the old grease from the spindle. Check the spindle for excessive wear or damage. Replace defective parts, as required.

    To install:

13. If the inner and outer cups were removed, use bearing driver handle tool T80-4000-W or equivalent and replace the cups. Be sure to seat the cups properly in the hub.
14. Use a bearing packer tool and properly repack the wheel bearings with the proper grade and type grease. If a bearing packer is not available work as much of the grease as possible between the rollers and cages. Also, grease the cone surfaces.
15. Position the inner bearing cone and roller assembly in the inner cup. A light film of grease should be included between the lips of the new grease seal.
16. Install the grease seal by driving in place with hub seal replacer tool T83T-1175-B and Driver Handle T80T-4000-W.
17. Install the hub and rotor assembly onto the spindle. Keep the hub centered on the spindle to prevent damage to the spindle and the retainer.
18. Install the outer bearing cone and roller assembly.
19. Carefully install the rotor onto the spindle. Install the outer wheel bearing in the rotor.
20. Install the adjusting nut and tighten 35 ft. lbs. (47 Nm) to seat the bearings.
21. Follow the appropriate wheel bearing adjustment procedures.

    Fig. 28: When installing the outer hub cover, align the cam pockets with the legs on the cover

1998 B Series Pick-up

WARNING
If equipped, always turn off the Automatic Ride Control (ARC) service switch before lifting the vehicle off of the ground. Failure to do so could damage the ARC system components. Refer to Section 1 for jacking procedures.

1. Loosen the wheel lug nuts then raise and safely support the front of the vehicle.
2. Remove the wheels.
3. Remove the front disc brake caliper, bracket and rotor. Also remove the rotor splash shield.
4. If equipped, unbolt the front wheel ABS sensor and wire harness from the steering knuckle.
5. Remove the front wheel hub nut and washer.

   WARNING
   Never reuse the wheel hub nut and washer. This nut is a torque prevailing design and cannot be reused.

   NOTE: The hub shaft is a slip fit into the wheel hub and bearing; a press is not normally required.

6. Ensure that the wheel hub shaft can be pushed inwards. If not, assemble a press to the front wheel studs and press the wheel hub shaft inwards slightly to break it loose.
7. Remove the three wheel hub/bearing to steering knuckle retaining bolts. Remove the hub and bearing assembly.

   To install:

8. Install the ABS sensor to the wheel hub then position the hub to the front axle shaft and steering knuckle.
9. Install the three retaining bolts and tighten them to 70–80 ft. lbs. (95–108 Nm).
10. Install the hub washer and nut and tighten to 157–213 ft. lbs. (212–288 Nm).
11. Install the ABS sensor retaining bolt.
12. Install the front brake rotor shield, rotor, bracket and caliper.
13. Install the wheel and snug the lug nuts.
14. Lower the vehicle and tighten the lug nuts to 100 ft. lbs. (135 Nm).

MPV Models

REAR WHEEL DRIVE

1. Raise and safely support the vehicle.
2. Remove the wheel assembly.
3. Remove the hub dust cap.
4. Remove the locknut.
5. Remove the brake caliper.
6. Remove the disc plate.
7. Remove the hub assembly.

   To install:

   Fig. 36: After installing the wheel hub/bearing assembly and retaining nut, use a torque wrench to tighten the nut

   Fig. 37: Using a hammer and a punch or drift, stake the hub/bearing retaining nut onto the spindle

8. Install the hub assembly.
9. Install the disc plate.
10. Install the brake caliper, torque the mounting bolts to 66–79 ft. lbs. (89–107 Nm).
11. Install the locknut, torque to 131–173 ft. lbs. (117–235 Nm).
12. Using a hammer and a punch or drift, stake the hub/bearing retaining nut onto the spindle.
13. Install the hub dust cap.
14. Install the wheel assembly.
15. Lower the vehicle.

4-WHEEL DRIVE

1. Raise and safely support the vehicle.
2. Remove the wheel assembly.
3. Remove the locknut.
4. Remove the brake caliper.
5. Remove the disc plate retaining screw(s).
6. Disconnect the tie-rod end from the knuckle.
7. Disconnect the lower ball joint.
8. Remove the disc plate.
9. Remove the ball joint mounting nuts and bolts.
10. Remove the knuckle, wheel hub and dustplate as an assembly.
11. Remove the wheel hub/bearing assembly from the knuckle.

    To install:

12. Install wheel hub/bearing assembly to the knuckle.
13. Install the knuckle assembly. Torque the strut mounting nut to 69–86 ft. lbs. (94–116 Nm).
14. Install the ball joint mounting nuts and bolts. Torque the upper mounting bolts to 76–101 ft. lbs. (102–137 Nm). Torque the through-bolt nut to 95–106 ft. lbs. (128–171 Nm).
15. Replace the disc plate.
16. Install ball joint to the knuckle assembly. Torque the ball joint nut to 116–137 ft. lbs. (157–186 Nm).
17. Connect the tie-rod end, torque the nut to 44–57 ft. lbs. (59–78 Nm).
18. Install the brake caliper, torque the mounting bolts to 66–79 ft. lbs. (89–107 Nm).
19. Install the disc plate retaining nut.
20. Install the locknut, torque to 174–231 ft. lbs. (236–313 Nm).
21. Install the wheel assembly.
22. Lower the vehicle.