Toyota Corolla

1992-1998 of release

Repair and car operation



Toyota Corolla
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Systems of cooling, heating
+ 5. Fuel, exhaust systems
+ 6. System of decrease in toxicity
+ 7. Transmissions
+ 8. Coupling and semi-axes
- 9. Brake system
   9.1. Specifications
   9.2. System of anti-blocking of brakes (ABS)
   9.3. Brake shoes of forward brakes
   9.4. Support of forward brakes
   9.5. Brake shoes of back disk brakes
   9.6. Support of back disk brakes
   9.7. Brake disk
   9.8. Brake shoes of back drum-type brakes
   9.9. Working cylinder
   9.10. Main cylinder of brake system
   9.11. Brake hoses and tubes
   9.12. Hydraulic system of brakes
   9.13. Vacuum amplifier
   9.14. Hand brake
   9.15. Ropes of the hand brake
   9.16. Brake pedal
   9.17. Switch of headlights of a stoplight
   9.18. The valve of restriction of the pressure, sensitive to car loading
+ 10. Suspension bracket and steering
+ 11. Body
+ 12. Electric equipment


9.8. Brake shoes of back drum-type brakes

GENERAL INFORMATION

Elements of a back drum-type brake


1. Valve of production of air
2. Piston
3. Cover
4. Cap
5. Spring
6. Washer
7. Lever of a brake shoe
8. Lever of the hand brake
9. The with-shaped
10. Back brake shoe
11. Coupling spring
12. Adjusting mechanism
13. Spring of the adjusting lever
14. Cap
15. Clamping spring
16. Cap
17. Forward brake shoe
18. Cap
19. Pin

Prevention

It is necessary to replace brake shoes at once on two wheels – never replace brake shoes only on one wheel.

The dust formed as a result of wear of brake shoes, contains the asbestos which is hazardous to health. Do not inhale it.

Do not use solvents on the basis of gasoline for cleaning of brakes. Use only the cleaner which has been specially intended for cleaning of brakes.

At replacement of brake shoes it is necessary to replace returnable and clamping springs also. Because of that springs are exposed to continuous overheat / cooling, they lose rigidity through a certain period of time that leads to that the brake shoe can not depart from a drum and wear out much quicker.


Replacement

PERFORMANCE ORDER
1. Turn off nuts of fastening of wheels, lift a back part of the car and establish it on support. Block forward wheels in order that the car casually did not sweep.
2. Release the hand brake.
3. Remove a wheel.

Prevention

It is necessary to replace at once all four brake shoes of back drum-type brakes. Not to mix them, work over each of wheels in turn.


4. Note the provision of installation of a brake drum in relation to a nave in order that the drum kept dynamic balance after installation.
5. If the brake drum hangs on brake shoes because of excessive wear, insert two screw-drivers into an opening of a guard of a back brake, will take away the adjusting lever from a cogwheel and turn it to take away brake shoes back.
6. Before removal of any elements of the mechanism of brakes, establish the pallet under a brake and wash out the mechanism of a brake cleaning liquid, wait, while it will dry; do not use the compressed air for a sduvaniye of the dust formed as a result of wear of brake shoes (the nave is removed for descriptive reasons).
7. Disconnect a returnable spring from a forward brake shoe.
8. Get the second end of a spring from an opening in a back block and remove the regulirosochny mechanism together with a spring.
9. By means of the tool for compression of springs remove a clamping spring, having pressed on it and having turned on a turn quarter.
10. Remove an external cap, a spring and an internal cap.
11. Get a pin through an opening in a board of a back brake.
12. Remove a forward brake shoe and disconnect a coupling spring from a back brake shoe.
13. Remove a clamping spring of a back block, caps and a pin.
14. Overturn a back block and take away a spring from the lever of the hand brake.
15. Disconnect a rope of the hand brake from the lever.
16. Put a back brake shoe on a pure desktop and disconnect a spring of the adjusting lever from a block.
17. Remove With-shaped ((((((do not lose a washer located under it).
18. Remove the lever of the hand brake and the adjusting lever from an old brake shoe.
19. Establish the lever of the hand brake and the adjusting lever on a new back brake shoe and fix them by means of new With-shaped ((((((do not forget about installation of a usual washer).
20. Establish a ledge on a back part of the adjusting lever in an opening of the lever of a brake shoe.
21. Turn the lever of a brake shoe back and press it to a block.
22. Hook on the short end of a spring of the adjusting lever for the lever of a brake shoe.
23. Hook on the long end of a spring for an opening in a back brake shoe.
24. Put a layer of high-temperature greasing on a board of a back brake in those places where it concerns brake shoes.
25. Insert a pin of a clamping spring of a back brake shoe into an opening in a board of a back brake.
26. Connect a rope of the hand brake to the lever of the hand brake.
27. Establish a back brake shoe into place, insert a pin into an opening in a block and establish an internal cap on a pin.
28. Establish a clamping spring and an external cap.
29. Compress a spring by means of the tool for compression of springs, turn an external cap on a quarter of a turn and fix it.
30. Establish the adjusting mechanism on a place and insert it into an opening of the adjusting lever which was in advance established on a back brake shoe.
31. Hook on a coupling spring for a back block.
32. Hook on a coupling spring for a forward block.
33. Establish a forward brake shoe on a place and hook on both ends of a returnable spring for openings in forward and back blocks.
34. Establish a pin, a clamping spring, internal and external caps of a clamping spring of a forward brake shoe and fix an external cap of a spring by means of the tool for compression of springs.
35. If the brake drum does not act in film from a semi-axis or from brake shoes, check, that the car was removed from the hand brake. If the drum still does not act in film, it is necessary to take away back brake shoes (see item 5).
36. Before installation of a drum he is necessary for examining on existence of cracks, scratches and firm inclusions which look as colourless spots. If they cannot be removed by means of an emery paper, or there are other damages from described above, it is necessary to give a brake drum to a repair truck for restoration. It is recommended to carry out restoration of a surface of a brake drum each time when dismantling brakes. Restoration of a surface will eliminate probability of emergence of radial palpation at a drum.
37. If the brake drum wore out so that it cannot be restored, without having exceeded the most admissible diameter (specified on a drum), it is necessary to get a new brake drum.
38. If you decide not to restore a drum surface, it is necessary to remove at least luster from its surface by means of an emery paper. Processing of a surface is necessary for carrying out roundabouts.
39. Establish a brake drum on a semi-axis.
40. Establish a wheel and twirl fixing nuts. By means of a screw-driver inserted into an opening of a guard of a back brake (see item 5) turn a cogwheel of the adjusting mechanism so that brake shoes began to concern a drum at its rotation, then turn off a cogwheel so that blocks ceased to concern a drum. Lower the car and tighten nuts of fastening of wheels till the demanded moment of an inhaling specified in the section of technical characteristics in the corresponding chapter.
41. Stop the car by means of brakes several times, moving to lobbies and a backing, and put the car on the hand brake several times finally to adjust back brakes.
42. Check work of brakes before the beginning of normal operation of the car.