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14:14. Replacement of brake shoes on back drum brakes

Brake shoes on back drum brakes

1 – screws;
2 – brake drum;
3 – openings in a drum;
4 – returnable spring;
5 – clip;
6 – rack;
7 – regulator spring;
8 – front brake shoe;

9 – back brake shoe;
10 – cable of the parking brake;
11 – a razzhimny level with the lever;
12 – tube of the brake system;
13 – bolts;
14 – working brake cylinder;
15 – anti-tinkling sound spring

Removal

PERFORMANCE ORDER
1. Lift the back party of the car and fix on support.
2. Remove back wheels and disconnect a cable of the parking brake.
3. Turn out two screws and remove the brake drum.

Prevention

If it is difficult to remove the brake drum, gradually and evenly screw in two openings bolts (on 8 mm) and remove the brake drum.


4. Remove the top returnable spring.
5. Remove forward and back clips of brake shoes and from a reverse side of a brake board remove racks of support of brake shoes.
6. Remove a spring of an anti-tinkling sound and a spring of the regulator.
7. Note the provision of an adjusting level and remove the lower returnable spring.
8. Remove a clip and a washer and disconnect a cable of the parking brake from a back brake shoe.
9. Remove lobbies and back brake shoes.
10. Clear all details of the back brake mechanism a cleaner of brakes and dry up them.

Check

PERFORMANCE ORDER
1. Lift the back party of the car and fix on support.
2. Remove back wheels and disconnect a cable of the parking brake.
3. Turn out two screws and remove the brake drum.

Prevention

If it is difficult to remove the brake drum, gradually and evenly screw in two openings bolts (on 8 mm) and remove the brake drum.


4. Examine working brake cylinders on lack of leak of brake fluid.
5. Measure thickness of overlays of back brake shoes. Replace all brake shoes on one axis of the car even if only one block has thickness, smaller maximum permissible.

Minimum admissible thickness: 1,0 mm
6. Check overlays of brake shoes for lack of pollution by oil or lubricants, wear and cracks.
7. Measure the internal diameter of the brake drum. Replace the brake drum if the internal diameter of a drum exceeds maximum permissible value.

Maximum diameter: 200 mm
8. Check brake drums for lack of cracks, dredging or unequal wear. If necessary, chisel or replace the brake drum.
9. Check uniformity of a prileganiye of a brake shoe to the brake drum.

Installation


PERFORMANCE ORDER
1. Grease with lubricant for brakes the following points of contact of brake shoes:
   a. points of contact of brake shoes with the working brake cylinder;
   b. points of contact with racks of support of brake shoes;
   c. points of contact of brake shoes with a brake board.
2. Establish an adjusting level and the plug approximately in too situation in which they were before removal.
3. Establish a back brake shoe, connect to it a cable of the parking brake and fix it by a washer and a clip.
4. Establish a front brake shoe and connect lobbies and back brake shoes the lower returnable spring.
5. Establish assembly of brake shoes on the support plate, with an adjusting level installed between forward and back brake shoes.
6. From a reverse side of a brake board establish racks and, clips, fix on them brake shoes.
7. Check correctness of installation of an adjusting level and establish the top returnable spring.
8. Establish a spring of an anti-tinkling sound and a spring of the regulator.
9. Install the brake drum and fix it by two screws.
10. Adjust brakes.
11. Establish back wheels and fix them by nuts.

Inhaling moment: 88–118 N • m