13.8.1. Removing the brake drum
- Place the rear of the car on stands and remove the wheel.
- Carefully remove the wheel hub cap using a screwdriver.
- Pull out the cotter pin, remove the locking nut and unscrew the adjusting nut.
- Pull the brake drum off the axle stub. At the same time, press the outer wheel bearing with your thumb, as shown in Figure 221, so that it does not fall to the ground.
Pic. 221. Removing the brake drum together with the outer wheel bearings (station wagon)
- If necessary, remove the brake shield.
13.8.2. Replacing a wheel bearing
- Place the brake drum on its outer side and remove the oil seal using a screwdriver. To do this, place the hammer handle as shown in Figure 222. Pull the inner bearing out of the drum.
Pic. 222. removing the oil seal from the brake drum (station wagon)
- Knock out both bearing races from opposite sides of the drum.
- Wash all parts thoroughly. Bearing separators must only be replaced together with their cages. Never leave the races in the brake drum, only replace the cages.
- Press or carefully drive new bearing races into the brake drum with the cone facing outwards.
- Lubricate the new bearing with heat-resistant grease. Press the lubricant well into the rollers. Lubricate the inside of the brake drum.
- Insert the inner bearing and drive a new oil seal into the drum from the inside. Wipe off excess grease from the inside of the brake drum.
- Install the brake drum/wheel hub.
13.8.3. Installing the brake drum/wheel hub
- Insert the outer wheel bearing into the brake drum (well lubricated) and place the brake drum on the axle axle. At the same time, press the bearing with both thumbs.
- Lubricate the outside of the outer bearing and install the spacer.
- Screw in the adjusting nut and tighten it to a tightening torque of 29 Nm. At the same time, rotate the brake drum several times in different directions to seat the bearing.
- Loosen the nut again (pic. 223), so that it can be turned by hand.
Pic. 223. Loosen the hub nut in the indicated direction
- Connect the steelyard to the wheel stud as shown in Figure 224. Pull and take readings as the brake drum begins to rotate. The value determines the friction coefficient of the oil seal and should be about 0.4 kg.
Pic. 224. Tighten the wheel hub nut with the head of the wrench, while simultaneously pulling back the steelyard.
- Tighten the nut by hand, putting on the head of the wrench and continuing to pull the steelyard. The adjustment is correct if the steelyard reading is between 0.4 and 1.0 kg.
- Put on the locking nut and insert a new cotter pin. If it does not fit, tighten the nut a little.
- Place some grease in the cap and carefully drive it onto the brake drum.
- Place the wheel and lower the car. Tighten the wheel nuts.