Warning! The pads should be changed on both rear wheels at the same time - changing the pad on only one wheel will result in unequal braking. Dust generated during pad wear may contain asbestos, which is harmful to health. Never blow it off with compressed air and try not to inhale it. DO NOT use mineral solvents to clean brake components, use a special cleaner or methyl alcohol.
1. Remove the brake drum as described in Section Removal, inspection and installation of rear brake drums.
2. Taking the necessary precautions, carefully remove dust from the drum, support plate and pads resulting from worn pads.
3. If any of the pads are worn to the specified Specifications minimum thickness, all four pads must be replaced. The pads must also be replaced if at least one of them is contaminated with oil or grease, since it cannot be cleaned.
4. If uneven wear or contamination is found, find and correct the cause before installing new pads.
5. If the condition of all components is satisfactory, install, install the brake drum as described in Section Removal, inspection and installation of rear brake drums. To replace the brake pads, proceed as follows.
All models except Scenic
1. Draw the position of the pads and each of the springs, as well as the gap adjuster, to facilitate subsequent installation (refer to accompanying illustration).
2a. Using pliers, remove the shoe strut spring support cups by pushing them in and turning 90°.
2b. Remove the springs and remove the support legs of the pads (refer to illustrations).
3. Carefully release the shoes from the lower pivot assembly to relieve tension on the lower return spring, then disconnect the spring from both shoes (refer to accompanying illustration).
4a. Release the upper ends of the shoes from the working brake cylinder, being careful not to damage its seals, and disconnect the handbrake cable from the driven shoe. Remove the expander bar and shoe assembly from the drum brake support shield. Do not press the brake pedal until you assemble the brakes.
4b. Install a tight rubber band on the brake cylinder so that the pistons do not come out of it (refer to illustrations).
5a. With the expander bar and shoe assembly on the workbench, release the handbrake lever stopper (if not done yet) separate the retaining spring of the expander bolt from the drive shoe.
5b. Disconnect the top return spring.
5c. Then separate the drive shoe and return spring from the driven shoe.
5d. Remove the spring, remembering its location (refer to illustrations).
6. Remove the adjuster bolt from the expander bar and carefully inspect the assembly for damage and signs of wear, paying particular attention to the bolt threads and adjuster wheel. Replace them if necessary. Please note that the left and right brake extension bars are not interchangeable. The bar bolts can be identified by the number of grooves on the shoulder of the adjuster wheel: the left bar bolt has two grooves, and the right bolt has only one (refer to accompanying illustration).
7. If new blocks are not supplied with the lever of a manual brake, rearrange it from old blocks. Attach the lever with a new bracket. All return springs should be replaced, regardless of their condition.
8. Make sure the components at the end of the spreader bar are installed correctly, then apply a small amount of high temperature grease to the threads of the adjuster bolt. Screw the adjuster wheel onto the bolt so that there is only a small gap between it and the bolt head, then install the bolt into the bar.
9. Hook the short hook of the expander retaining spring to the driven brake shoe. Attach a bar to the end of the spring, then place it into the slot in the driven brake shoe.
10. Hook the top return spring to the driven shoe. Attach the drive shoe to the other end of the spring and slide the drive shoe down so that the head of the adjuster bolt fits into the corresponding slot. Hook the retaining spring to the drive shoe (refer to accompanying illustration).
11. Remove the rubber band installed on the brake cylinder. Bend back the rubber protective wings and check the working brake cylinder for damage and tightness. Make sure both pistons move easily in the cylinder. Refer to Section Removal and installation of the rear brake cylinder, if necessary, replace the brake cylinder.
12. Before installation, clean the drum brake support shield and apply to the pad contact surfaces (especially on the cylinder pistons and the lower joint) some high temperature grease or anti-seize compound. Do not use too much grease, otherwise it may get on the brake pad lining.
13. Be convinced that the limiter of the lever of a manual brake rests against edge of a conducted brake pad.
14. Place the expander bar and shoe assembly on the support plate and attach the handbrake cable to the driven shoe lever. Install the upper ends of the shoes on the pistons of the brake cylinder, then attach the lower return spring to the shoes and insert them into the lower pivot assembly.
15. Center the pads on the base plate. Install the pad support posts and their springs and secure them with the support cups.
16. Using a screwdriver, turn the expansion bar adjuster wheel so that the diameter of the circle formed by the shoes is 202.5 - 202.7 mm.
17. Place drum in operating position, but do not install hub nut yet.
18. Repeat the above procedure on the second rear brake.
19. After replacing the pads of both rear brakes, adjust the gap between the brake linings and drums, alternately applying the foot and hand brakes. Ask an assistant to make sure that the spreader bars are functioning correctly (when you press the pedal, the expander bar adjuster should click).
20. Remove the drums and adjust the handbrake as described in Section Handbrake adjustment.
21. Install the brake drums (refer to section Removal, inspection and installation of rear brake drums).
22. Finally, check the brake fluid level as described in Section Schedule of ongoing maintenance.
Scenic Models
1. Sketch the relative positions of the pads and springs, as well as the location of the components of the gap adjuster, to facilitate subsequent installation.
2. Using a screwdriver or pliers, unhook the return spring from both shoes.
3. Unhook the spring from the governor lever and brake shoe and remove it (refer to accompanying illustration).
4. Remove the governor lever from the guide on the brake shoe.
5. Using pliers, remove the shoe strut spring support cups by pressing them in and turning 90°. Remove the springs and remove the support legs.
6. Carefully remove the shoes from the brake cylinder and the lower pivot assembly. Remove the spreader bar.
7. Disconnect the lower coupling spring from both shoes and unhook the handbrake cable from the driven shoe.
8. Do not press the brake pedal until you have assembled the brakes. Install a tight rubber band on the brake cylinder so that the pistons do not come out of it.
9. Remove the adjuster bolt from the expander bar and carefully inspect the assembly for damage and signs of wear, paying special attention to the threads of the adjuster bolt and wheel. Replace them if necessary. Please note that the left and right bars are not interchangeable and are color coded.
10. If the new pads are not equipped with a handbrake lever, move it from the old pads. Attach the lever with a new bracket. All return springs should be replaced, regardless of their condition.
11. Make sure the components at the end of the spreader bar are installed correctly, then apply a small amount of high temperature grease to the threads of the adjuster bolt. Screw the adjuster wheel onto the bolt so that there is only a small gap between it and the bolt head, then install the bolt into the bar.
12. Remove the rubber band installed on the brake cylinder. Bend back the rubber protective covers and check the working brake cylinder for damage and tightness. Make sure both pistons move easily in the cylinder. Refer to Section Removal and installation of the rear brake cylinder, if necessary, replace the brake cylinder.
13. Before installation, clean the drum brake support shield and apply to the pad contact surfaces (especially on the cylinder pistons and the lower joint) some high temperature grease or anti-seize compound. Do not use too much grease, otherwise it may get on the brake pad lining.
14. Attach the handbrake cable to the driven shoe lever, then install the lower return spring. Place the pads in the lower pivot assembly.
15. Place the expansion bar on the pads, then install the upper ends of the pads on the brake cylinder pistons.
16. Center the pads on the base plate. Install the pad support posts with the springs and attach them with the support cups.
17. Attach the top return spring to the driven shoe and then to the drive shoe.
18. Install the regulator lever on the landmark on the block and attach the lever spring.
19. Using a screwdriver, turn the expander bar adjuster wheel so that the diameter of the circle formed by the shoes is 227.4 and 227.9 mm.
20. Place drum in operating position, but do not install hub nut yet.
21. Repeat the above procedure on the second rear brake.
22. After replacing the pads of both rear brakes, adjust the gap between the brake linings and drums by depressing the brake pedal several times. Ask an assistant to make sure that the spreader bars are functioning correctly (when you press the pedal, the expander bar adjuster should click).
23. Remove the drums and adjust the handbrake as described in Section Handbrake adjustment.
24. Install the brake drums (refer to section Removal, inspection and installation of rear brake drums).
25. Finally, check the brake fluid level as described in Section Schedule of ongoing maintenance.