Warning. Brake pads must be replaced on both wheels at the same time. Never replace the pads on just one wheel. In addition, the dust generated by brake pad wear contains asbestos, which is hazardous to your health. Do not blow out the brakes with compressed air or inhale the dust. We recommend working with brakes while wearing a respirator. Under no circumstances use petroleum-based solvents to clean brakes. Cleaning of brakes should only be done with a brake system cleaner.
Caution: When replacing the brake pads, the return springs and the springs of the brake pad self-adjusting device must be replaced. Due to the continuous alternation of cooling/heating, the springs lose their stiffness, which can lead to insufficient movement of the pads from the brake drum and. consequently, to rapid wear of the brake pads.
1. Loosen the rear wheel nuts, lift the rear of the vehicle and place it on supports. Place chocks under the front wheels to prevent the vehicle from moving. Remove the rear wheels and release the parking brake.
2. Remove the brake drum. To do this, you simply need to remove the drum from the hub.
Note: Some models require the hub cap to be removed first. If the drum does not come off, gently tap it with a wooden hammer or screw an 8 mm diameter bolt into the special hole in the drum (figure 6.2).
3. The procedure for removing the hub cap will be significantly simplified if you first remove the rear wheel bearing cap, unscrew and remove the hub nut together with the washer, and then remove the hub (see chapter 10).
4. The procedure for replacing the pads is shown in detail in the figure 6.4,a-k. Follow this order and carefully read all the captions under the figures. All four rear wheel pads should be replaced at the same time, but to avoid mixing up the parts, perform this procedure first for one wheel and then for the other.
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5. Before installing the drum, align the shoes. Using a screwdriver, move the cam to the side and turn the ratchet mechanism of the regulator to reduce the distance between the pads (figure 6.5).
6. Also, before installing the brake drum, ensure there are no deep scratches, cracks, or burrs on its inner surface. If the marks on the disc surface cannot be removed with sandpaper, or the drum's working surface has the aforementioned defects, the drum will need to be resurfaced.
Note: We recommend mechanical treatment of the brake drum whenever it is removed. This eliminates its beating.
If the inner diameter of the drum exceeds the maximum allowable (this diameter is stamped on the drum) (see Fig. 6.6) You will have to purchase a new drum. If you do not plan to ream the drum, at least remove shiny spots from its surface using circular motions of sandpaper.
7. Install the hub and bearing, install the washer and new hub nut if these components were removed (see chapter 10). Tighten the nut to the specified torque (see Technical data at the beginning of Chapter 10).
8. Install the brake drum.
9. Install the wheel and tighten the nuts. Lower the vehicle and tighten the wheel nuts to the specified torque (see Technical data at the beginning of Chapter 1).
10. Press the brake pedal several times to adjust the gap between the pads and the drum. After this, brake the car several times while moving forward and in reverse, and also apply the parking brake several times.
11. Check the operation of the braking system thoroughly before driving.
Warning. Avoid traveling by car. if you are not sure that the braking system is in good working order.