Removing
1. Mark with paint the position of the rear wheels on the hubs. This will allow the assembly to set the balanced wheel in its original position.
2. Loosen the wheel bolts. The vehicle must be on wheels during this operation.
3. Install the car on the goats and, having unscrewed the wheel bolts, remove the rear wheels.
Attention! There is a risk of injury when jacking up the vehicle or placing it on jack stands. Therefore, it is recommended that you familiarize yourself with the safety precautions outlined in chapter «car jacking».
4. Release the parking brake.
5. Set the parking brake adjustment mechanism to its original position by unscrewing gear 1 of the mechanism with a screwdriver. A screwdriver for this operation is inserted into the wheel bolt hole (see illustration).
Attention! To set the adjusting mechanism of the parking brake pads of the right wheel to its original position, the gear of the mechanism should be turned with a screwdriver from the bottom up, and the left wheel - from top to bottom.
6. Remove the rear wheel brake caliper, see relevant chapter.
7. Remove the rear wheel brake disc, see relevant chapter.
Attention! Remember or write down before dismantling the elements of the parking brake of the rear wheel, their mounting position. When assembling, you can check the brake mechanism of the second wheel.
8. Disconnect the return spring 1 from the brake shoes 3 using the hook 2, for example, HAZET 4964-1 (see illustration).
9. Turn the flange 1 on the rear wheel hub so that one of the holes for the wheel bolt is set against the pressure spring 2 of the brake shoe (see illustration).
10. Insert a tool 3, e.g. HAZET 2730, or a screwdriver into the hole on the rim, press down on the pressure spring 2, turn it about 90°and remove the pressure spring (see illustration 7.9).
Attention! A tool for removing the pressure spring can be made independently. This requires a bar of the appropriate diameter, to the end of which the handle is welded, forming a letter «T». A slot up to 2.5 mm wide and up to 4 mm deep is cut at the second end of the bar.
11. Remove the clamping spring of the second brake shoe in the same way.
12. Move apart brake pads 1 and remove them. Mark the mounting position of the brake pad adjuster. The set ring must face forward (see illustration).
13. Disconnect the return spring 4 from the brake shoes and remove the adjusting mechanism 1-3 (see illustration).
14. Squeeze out the bolt 5 from the expansion bar 6 of the brake pads and disconnect the tip of the brake pad drive cable from it (see illustration 7.13).
Installation
If the brake pad linings are burnt, it is recommended to replace the brake pad return springs as well.
15. Lubricate the bearing surfaces of the pad expander bar with a thin layer of high temperature paste such as Liqui Moly LM-36, MOLYKOTE U, or G-RAPID.
16. Disassemble the adjusting mechanism. Lubricate the threads of pressure pin 1 as well as the cylindrical part of the adjusting gear 2 with high temperature paste (see illustration 7.13).
17. Screw in pressure pin 1 (plunger) into the hole on the gear 2 and insert them into the spacer sleeve 3. In this case, screw the pressure pin until it stops (see illustration 7.13).
18. Fix the parking brake cable with a bolt on the brake pad expander bar. After that, feed the expander bar to the support shield.
Attention! When installing the expansion mechanism, make sure that its moving part is facing upwards.
19. Install the adjusting mechanism in place between both brake shoes. At the same time, the push pin (plunger) must face forward in the direction of travel of the vehicle.
20. Fix the upper return spring 4 on the brake shoes (see illustration 7.13).
21. Stretch the brake pads connected to each other by the upper return spring and install them in place, fastening them with an expander bar.
22. Install the pressure spring 1 using the HAZET-2730 tool or a screwdriver 2 through the wheel bolt hole. After that, push it in and turn it 90°so that the spring is fixed in the support cup. Make sure the spring is properly seated.
23. Install the second brake shoe retainer spring. Depending on the manufacturing variant, both ends of the lower return spring differ in the size of the hooks.
24. Attach the smaller hook of the lower return spring to the front brake shoe near the expander bar, and the larger end (see arrow in illustration) use a screwdriver to get on the rear block.
25. Install the rear wheel brake disc, see relevant chapter.
26. Install the caliper, see relevant chapter.
27.. Install the rear wheels in accordance with the marks made during removal. Before doing this, lubricate the centering seat of the wheel disc on the hub with a thin layer of grease. Do not grease wheel bolts. Replace rusted bolts with new ones.
28. Screw in the wheel bolts and lower the car.
29. Tighten the bolts in a cross pattern to 110 Nm.
30. Adjust the parking brake, see relevant chapter.