With Automatic Locking Hubs

Fig. 6 Automatic Locking Hub:

CAUTION: Wheel bearing lubricant is a lithium-base grease. Sodium-base grease is not compatible with lithium-base grease and should not be intermixed. Therefore, do not lubricate front wheel bearings without first identifying the type of original wheel bearing lubricant. Usage of incompatible bearing lubricants may result in premature lubricant breakdown.

Installing Bearing Cups (Typical):

1. If inner or outer bearing cups were removed, install replacement inner and outer bearing cups in the hub with the appropriate bearing cup replacer tool. Be sure to seat the cups properly in the hub. The cups will be properly seated when they are fully bottomed. Replace grease retainers. Polish grease retainer journal on spindle with 400 grit sandpaper. Clean with clean cloth.
2. Pack the inside of the hub with lithium-base grease or equivalent. Fill the hub until the grease is flush with the inside diameters of both bearing cups. Pack the bearing cones and rollers with wheel bearing grease. Use a bearing packer for this operation. If a packer is not available, work as much lubricant as possible between the rollers and cages. Lubricate the cone surfaces with grease.

Installing Grease Seal (Typical):

3. Place the inner bearing in the inner cup and install the new grease seal. Be sure that the seal is fully seated.
4. Install the hub and rotor on the wheel spindle. Keep the hub centered on the spindle to prevent damage to the grease retainer or the spindle threads.
5. Place the outer bearing in the outer cup.
6. Install the wheel bearing adjustment nut.
7. While rotating the hub and rotor assembly, tighten the wheel bearing adjusting nut to 47 Nm (35 ft lb) to seat the bearings. Spin the rotor and back off the nut one-quarter turn (90 degrees).
8. Retighten the adjusting nut to 1.8 Nm (16 in lb) using a torque wrench.
9. Make sure the final end play of the wheel on the spindle is 0.00-0.08 mm (0.000-0.003 in). the maximum torque to rotate the hub is 2.8 Nm (25 in lb).
10. Align the closest lug in the wheel bearing adjusting nut with the center of the spindle keyway slot. Advance the nut to the next lug if required. Install the separate locking key in the spindle keyway under the adjusting nut.

WARNING: Extreme care must be taken when aligning the spindle nut adjustment lug with the center of the spindle keyway slot to prevent damage to the separate locking key. The wheel and tire assembly may come off while the vehicle is in motion if the key is damaged.

11. Install the two thrust spacers and push or press the cam assembly onto the locknut by lining up the key in the fixed cam with the spindle keyway.

CAUTION: Extreme care must be taken when aligning the fixed cam key with the spindle keyway to prevent damage to the fixed cam.

12. Install the axle shaft spacer.
13. Clip the snap ring onto the end of the spindle shaft.
14. Install the automatic locking hub assembly over the spindle. Align three hub assembly legs with three pockets in cam assembly. Install the retainer washers.
15. Install the caliper.
16. Install the wheel and tire assembly. Install and tighten lugnuts to 135 Nm (100 ft lb).

For additional information see Installation Notes.