Contents: Removal ↡ Installation ↡
Front wheel support |
Rear wheel support |
Removal
1. Mark the position of the wheels relative to the hub with paint. This will allow the balanced wheel to be put back in place after removal so that the balance is not disturbed. Loosen the wheel bolts without lifting the car, then place the car on stands and remove the wheels.
2. Turn off the ignition. Unscrew and remove the ABS speed sensor (L6/1).
3. Unscrew the 2 bolts securing the rear wheel brake caliper (35) to the wheel bearing housing and remove it outward.
4. Hang the caliper with a homemade hook to the body so that the brake hose and brake pad wear sensor wire do not get twisted or pulled.
5. If the caliper is to be removed completely, first unscrew the brake hose (51) from the hydraulic line using a 9x11 mm open-end double-ended spanner. Then unscrew the brake hose from the caliper.
Warning! Brake fluid will leak. Close the holes with plugs immediately to prevent the reservoir from emptying. After installation, the brake system must be bled. In vehicles with the ASR anti-slip system, a special device used in specialized workshops is required to bleed the brakes. Collect the leaking brake fluid in a specially designed container. Follow the instructions for handling brake fluid (see subsection 11.10.).
6. Disconnect the pad wear sensor at the caliper connector. Unscrew the connector from the caliper.
Installation
1. When replacing, keep in mind: the brake mechanism on both wheels of the same axle must have the same pistons from the same manufacturer.
2. Front brakes: Install the caliper and tighten it to the hub with two new self-locking bolts to a torque of 115 Nm.
Attention! If the bolts go in with difficulty, clean the threads from the remains of the fastener using a tap M 12x1.5.
3. Rear brakes: fit the caliper and secure with two new self-locking bolts to the hub with a torque of 50 Nm, in cars with the ASR system - 70 Nm.
Caution! If the bolts are difficult to insert, clean the threads from any remaining fasteners using an M 10 tap.
4. If the brake hose was removed, screw it to the hydraulic line with a torque of 15 N·m. Do not twist the hose when installing. A locking plate (60) with a twelve-sided socket is attached to the bracket (52). Insert the brake hose (51) into the locking plate so that it moves freely when the wheel is fully turned left and right, when the suspension spring is compressed and stretched. 4 - hydraulic line, 13 - union screw, 59 - brake hose bracket.
5. Lubricate the hole for the ABS speed sensor with Molykote Longtherm 2. Check the O-ring and replace if necessary. Install the speed sensor, tightening it with a new Allen bolt to 20 Nm,
6. Connect the brake pad wear sensor wire to the connector on the caliper.
7. If the brake system has been opened, bleed the brakes.
8. Position the wheels so that the markings applied before removing them match. Screw the wheels on. Remove the car from the stands and tighten the wheel bolts in a cross pattern to a torque of 110 N·m.
Caution! Press the brake pedal vigorously and repeatedly until you feel strong resistance. This adjusts the brake pads.
9. Check the brake fluid level in the reservoir and top up to the maximum mark if necessary.
Attention! Conduct a safety check:
- are the brake hoses tight?;
- is the brake hose in the bracket;
- are the bleed screws tightened?;
- is the brake fluid level ok?.
Caution! With the engine running, check for leaks. To do this, press the brake pedal with a force of 200 to 300 N (20–30 kg) for about 10 seconds. The pedal should not move. Check the tightness of all connections.
10. Finally, make a few braking attempts on a quiet street.