Attention: If noises are heard from the outer surface of the wheel during sharp turns. this indicates defective wheel bearings.
1. Brake shield. 2. Steering knuckle. 3. Outer race of the bearing. 4. The front of the hub. 5. Outer tapered roller bearing. 6. Bolt. 7. Hub nut. 8. Contact spring. 9. Hub cap. 10. Bearing outer race. 11. Inner tapered roller bearing. 12. Oil seal. 13. Brake disc clamping bolt. 14. Brake disc.
Caution: The cages and wheel bearing outer races must be laid out in the order they were removed so as not to mix them up during installation.
Remove the brake caliper and hang it out of the way so it doesn't get in the way. Pry off the hub cap with a screwdriver and remove it. Remove the contact spring, loosen the bolt and unscrew the nut that secures the hub to the stub axle.
Remove the front part of the hub together with the brake disc from the stub axle.
Attention: Watch out. so that the outer wheel bearing does not fall out.
Remove brake disc.
Using an aluminum or brass bead, carefully drive the outer wheel bearing support ring outward, making sure that it runs without distortion.
Attention: The beard must be made of soft metal and not damaged so as not to damage the ring or its seat.
Drive out the inner bearing support ring using a hex wrench. In the absence of a nozzle, you can use a beard, but at the same time try not to damage the ring.
Examination
Inspect the surface of the stub axle, in particular where the oil seal is installed. If necessary, replace the pivot pin.
Thoroughly clean the inside of the tapered roller bearings and the hub. It is recommended to use a special cleaning solution. Check the condition of the bearing seats in the hub.
Inspect the bearing support rings in the hub for scratches. The ring is considered to be in good condition if it has a smooth gray track from a running roller bearing.
If the rings have bearing dents, or if the raceways are light brown to blue due to overheating, the bearings must be replaced.
Check the condition and freedom of rotation of the roller bearings. The presence of rust on the bearing usually indicates a defective oil seal. Rusted wheel bearings must be replaced.
Caution: Always replace both wheel bearings. When reinstalling old bearings, be careful not to confuse their cages and outer races.
Carefully install the bearing support rings into place, making sure that they fit without distortion.
Apply 45 g high temperature roller bearing grease to the hub and bearings. Apply grease to the cages so that it fills the gaps between the rollers.
Install the separators in the hub and grease the front ends of the rollers.
Fill the gap between the edges of the new oil seal with grease and apply sealant to its outer edges (e.g. Curil). Drive the oil seal into its place in the hub using a piece of pipe of a suitable diameter.
Fill the front of the hub with the remaining grease.
Attention: If too much lubricant is used, it may overheat during driving and lose its lubricating properties. Too little grease does not guarantee proper lubrication of the wheel bearings.
Install the brake disc and caliper.