Rear wheel brake
1. Wheel bolt, 160 Nm; 2. Hex socket screw, 5 Nm; 3. Brake drum; 4. Spring plate; 5. Pressure spring; 6. Lower return spring; 7. Tension spring; 8. Adjusting lever; 9. Upper return spring; 10. Brake shoe with lining; 11. Brake lever; 12. Push rod with adjusting gear; 13. Return spring; 14. Locking pin; 15. Brake pipeline; 16. Screw, 19 Nm; 17. Brake cylinder; 18. Screw, 7 Nm; 19. Self-tapping screw, 7 Nm; 20. Handbrake cable bracket; 21. Lower return spring; 22. Handbrake cable; 23. Hex socket screw; 24. Brake support; 25. Spring brake force regulator; 26. Hex nut, 20 Nm; 27. Screw; 28. Locking plate; 29. Holder; 30. Swivel fist; 31. Screw, 10 Nm; 32. ABS speed sensor
Removing
1. Loosen the front wheel mounting bolts. The car is on wheels.
2. Mark the position of the disc relative to the wheel hub with paint to then install the balanced wheel in its original position.
3. Place the car on jack stands, remove the wheel.
4. Remove the 2 brake screws from the wheel bearing housing and remove the brake and brake carrier assembly.
5. If necessary, unscrew the brake hose brackets from the wheel bearing housing.
6. Hang the brake mechanism on a homemade wire hook to the body so that the brake hose is not twisted or stretched.
Attention! Do not remove the brake hose, otherwise it will be necessary to bleed air from the system.
7. If the brake mechanism is to be removed completely, the brake hose must first be unscrewed from the brake hose connection, not from the brake mechanism.
Attention! Leakage of brake fluid. Collect the fluid in a container designed for brake fluid only. You can first suck out the brake fluid with a rubber bulb from the expansion tank.
8. Unscrew the screw securing the brake disc with a 5 mm Allen key.
9. Remove brake disc.
Attention! The brake disc must not be removed by brute force (hammer blows) from the wheel hub. Instead: Apply a rust remover. This will prevent damage to the brake disc. If, nevertheless, the removal took place only by strong blows of a hammer, replace the brake disc and wheel bearing, based on safety conditions. The replacement of the wheel bearing must be entrusted to a service station, since only there, as a rule, there is an appropriate press. Even if an appropriate puller is used, the brake disc must be replaced.
Installation
1. In order to ensure uniform braking on both sides, both discs must have the same ground surfaces. Therefore, both brake discs must be replaced or both must be ground.
2. At the factory, it is possible to check the brake discs for a fight. The maximum allowable breakage measured on the braking surface is 0.03 mm. The maximum allowable deviation in thickness is 0.01 mm.
3. Measuring the thickness of the brake disc (see subsection 7.5).
4. If there is, remove rust from the brake disc flange and front wheel hub, lubricate with a thin layer of grease.
5. Clean new brake discs with a nitro thinner to remove protective varnish.
6. Install the brake disc onto the wheel hub and secure with an Allen screw.
7. Install the brake mechanism together with the installed brake pads. Do not kink or stretch the brake hose while doing this. Check the free play of the brake hose by turning the steering wheel as far as it will go.
8. Screw the brake hose bracket onto the end of the wheel bearing.
9. Tighten the brake mechanism to 270 Nm.
Attention! High torque, use durable tool. When tightening, watch that the machine does not slip off the goat. Install the tool so that when tightening, press down on the handle.
10. If the expansion tank is empty or the brake hose was removed, screw on the brake hose and bleed air from the system (see subsection 7.12).
11. Install the wheel according to the marking and remove the machine from the stands and tighten the bolts crosswise to a torque of 160 Nm.
Attention! Squeeze out the brake pedal repeatedly and vigorously in place until a noticeable resistance appears.
12. Check brake fluid level in expansion tank (see subsection 7.13).
Attention! Lubricate the threads of the pressure rod, the contact surfaces of the brake shoes to the brake support, the ribs of the brake shoes in the supports, the brake lever with a light layer of Molykote G6 paste.
13. Replace brake pads only on both wheels of the same axle. Use brake linings of the same quality.
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