REMOVAL, PACKING AND INSTALLATION
See Figures 1 through 8Front Wheel Drive Models
The rear wheel bearings (inner and outer bearings) should be inspected and serviced frequently in areas of heavy road salt use or extremely rainy areas. To inspect and clean the rear wheel bearings follow this procedure:
- Raise and safely support the vehicle. Remove the rear tire/wheel assembly.
- Remove the grease cap (don't distort it) the cotter pin, lock cap and nut.
- Hold the outside of the hub/drum with your fingers and place the thumbs lightly against the inner edge of the hub/drum. Pull outward gently; the whole assembly will slide off and your thumbs will keep the outer wheel bearing from falling to the ground. The inner bearing (on the other side of the hub/drum) is held in by the grease seal.
- Place the hub/drum assembly on the work bench. Remove the outer bearing and flat washer. Turn the assembly over and use a seal remover or similar suitable tool to pry out the inner grease seal. A small prytool and a hammer handle (to use as a fulcrum) may be used to carefully pry out the seal. Remove the inner bearing.
Since this is a maintenance procedure, DO NOT attempt to remove the bearing races from the inside of the hub/drum. The races should be removed only in the event of bearing replacement, refer to Suspension & Steering as necessary.
- Clean all the components thoroughly, including the inside of the hub/drum, both bearings and the stub axle on which everything mounts. All traces of the old grease must be removed.
Use only proper commercial parts cleaners. Do not use gasoline or similar products for cleaning parts. A stiff-bristled parts cleaning brush or even an old, clean paint brush is very handy for cleaning bearings.
- After cleaning, allow all the parts to air dry. Never blow bearings dry with compressed air, as bearing damage could occur.
- Inspect all the parts. Look carefully for any signs of imperfect surfaces, cracking, bluing or looseness. Check the matching surface on which the bearings run; the races should be virtually perfect and free of damage.
- Repack the wheel bearings using high quality multi-purpose (MP) grease. Each bearing must be fully packed. The use of a bearing packer is highly recommended but the job can be done by hand.
To repack the rear wheel bearings follow this procedure:
- Place a golf ball-sized lump of MP grease in the palm of your hand.
- Hold the bearing in your other hand and force the wide side of the bearing into the grease. Use a pushing and scraping motion to force the grease up into the rollers. Continue this until grease oozes out the small side of the bearing.
- Change the position by which you hold the bearing and repeat the procedure, forcing grease into an untreated area of the bearing.
- Continue around the bearing until all the rollers are packed solid with grease.
- Place the bearing on a clean, lint-free rag or towel while greasing other components.
- Coat the inside of the hub/drum with a liberal layer of grease. Remember that the stub axle comes through here; don't pack it solid.
- Fill the grease cup about 1 / 2 full of MP grease.
- Install the inner bearing into the hub/drum. Use a new grease seal and install it with a seal installer or equivalent. Do not attempt to use a hammer or drift; the seal may be damaged. Coat the lip of the seal lightly with a bit of MP grease.
- Fit the outer bearing loosely into place and put the large flat washer over it. Again holding the washer and bearing in place with your thumbs, fit the hub/drum assembly onto the stub axle. Make sure the small tooth on the inside of the bearing washer aligns with the groove in the stub axle.
- Install the outer bearing and thrust washer.
Adjust the preload as follows:
- Install the adjusting nut onto the axle. Use the torque wrench and set the adjusting nut to 22 ft. lbs. (30 Nm).
- Turn the hub/drum right and left two or three times each way; this will allow the bearings to seat in the correct position.
- Loosen the adjusting nut until it can be turned by hand. Confirm that there is absolutely no brake drag.
- Using a spring scale, measure and make note of the rotation frictional force of the oil seal.
- Tighten the adjusting nut until the preload is within specification. The preload specification is 0.9-2.2 lbs. in addition to rotation friction force of the oil seal. Insure that the hub rotates smoothly.
- Install the lock cap, a new cotter pin (always!) and the grease cap. If the cotter pin hole does not line up, first try turning the lock cap to a different position. If this is ineffective, tighten the nut by the smallest possible amount.
- Check rear brake shoe adjustment. Install the tire/wheel assembly.