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See the prevention at the beginning of the Section Removal and installation of supports of disk brake mechanisms!
Along with replacement of brake boots also replacement of their coupling and directing springs which as a result of constant cyclic mechanical and thermal loadings stretch/sink over time has to be made, stopping developing the required effort that conducts to a prikhvatyvaniye of brakes and acceleration of wear of drums. |
1. Weaken nuts of fastening of back wheels. A car back also establish to Poddomkratta it on props. Prop up forward wheels antiretractable boots. Remove wheels.
2. Release the parking brake. Also remove brake drums.
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The drum has to be removed from a nave rather freely, in case of difficulties, accurately tap it the hammer with soft brisk. If the drum still does not give in to removal, it is necessary to wring out brake boots from its working surface. Take a rubber cap from a brake board, pass the screw-driver throughout the opened opening and take away it the self-regulator lever from an adjusting asterisk. The second screw-driver rotate an asterisk until the drum completely is not released. If the drum "stuck" to a nave, screw in carving openings in its face surface couple of bolts of the suitable size and try to shift assembly by their gradual tightening. |
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Replacement of boots has to be made at the same time on both brake mechanisms. In order to avoid confusion at assembly dismantle of brake mechanisms has to be made serially, - the second can be used as an example at assembly |
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3. Carefully clear mechanism components of brake dust with application of special means. |
4. Remove assembly of a nave with the wheel bearing (see the Head Podvesk and steering).
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5. Take from brake boots the directing springs with the cups. |
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6. Delay a forward boot forward so to bring it out of gearing with the corresponding piston of the wheel cylinder and an anchor plate, then disconnect the lower coupling spring from a boot. |
7. Delay a back boot back and release it from the second piston of the wheel cylinder.
8. Remove assembly of the self-regulator (try remember the adjusting provision of assembly).
9. Disconnect the top coupling spring from a forward boot and remove the last from the brake mechanism.
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10. Disconnect the top coupling spring from a back boot. |
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11. Disconnect a driving cable of the parking brake from the executive lever on assembly of a back boot, take off a back boot. |
12. Having delayed boots of pistons of the wheel cylinder, check assembly for existence of signs of development of leaks. In case of need replace the cylinder (see the Section Removal and installation of wheel cylinders).
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13. Wash out a brake board special structure, then grease with high-temperature lubricant the sites of its surface contacting to boots. |
14. Remove a lock ring of fastening of an axis of the executive lever of the parking brake. Remove the lever and transfer it to a new back boot. Do not forget enclose a washer under the lever and to replace a lock ring.
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15. Connect a cable of the drive of the parking brake to the executive lever. |
16. Establish assembly of a back boot on a brake board. Fill an anchor finger in an opening and establish the directing spring with a cup.
17. Clean a carving of a screw part of assembly of the regulator and grease it with high-temperature lubricant. Grease with the same lubricant the end of an axis of the screw.
18. Fill a regulator tip in a reciprocal groove in assembly of a back brake boot. Track that the regulator was deployed on the mechanism correctly.
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19. Establish a forward boot and record it the directing spring. Track that tips of assembly of the regulator correctly entered gearing with both boots. |
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20. Establish coupling springs. |
21. Before installation of the reel it is necessary to check it for existence of cracks, zadir, furrows, traces of an overheat and other defects. At identification of serious damages which traces cannot be eliminated by processing of a drum with a fine-grained emery paper the drum should be given to a pro-point (with observance of the maximum admissible repair diameter).
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Authors of the present manual recommend to make a pro-point of drums regardless of their state for the purpose of any removal of defects and elimination of ovality. If the pro-point of a drum cannot be made without violation of requirements to the maximum admissible internal diameter (it is beaten out on a drum), it is necessary to make its replacement. If it is not possible to make a pro-point of drums, at least, carefully smooth out them working surfaces a fine-grained emery paper. |
22. Rotation of an asterisk of the regulator achieve such provision of brake boots that the drum was put on them without special difficulties. Having put on a boot, through an opening in a brake board rotation of an asterisk of the regulator press boots to the working surface of the reel, then again release them so that the drum began to be rotated freely. Several times firmly squeeze out a pedal of a foot brake, then make sure that at a pedal otpuskaniye the drum is rotated freely, in case of need tighten up as appropriate a regulator asterisk.
23. Establish a wheel, lower the car on the earth and tighten wheel nuts with the required effort (see Specifications to the Head Nastroyki and routine maintenance).
24. Several times slow down the car at the movement it both to lobbies, and a backing for the purpose of performance of automatic adjustment of brake mechanisms (do not forget to cock also several times the parking brake).
25. Before starting operation of the car, make sure of serviceability of functioning of brakes. |