Attention: If the brake caliper needs to be removed only to dismantle the brake disc, then the brake hose must not be loosened, otherwise air will have to be bled from the brake system after assembly. Hang the brake caliper on the body with a hook made of wire, so that the brake hose is not twisted or stretched.
Withdrawal
Mark the position of the front wheels in relation to the hubs with paint. This will allow the balanced wheel to return to its original position. When loosening the wheel bolts, the vehicle must be on its wheels. Raise the car from the front and remove the front wheels.
Press the brake pedal lightly and lock. To do this, insert a board between the pedal and the seat and move the seat forward or backward respectively. This prevents fluid from leaking out of the expansion tank and air from entering the system after disconnecting the brake lines.
Unscrew the brake hose at the brake coupling head. Otherwise, you cannot unscrew the brake hose from the caliper.
Caution: Some brake fluid may leak out. Collect the brake fluid in a bottle that is only for brake fluid.
Unscrew the 2 bolts -1- for the caliper and remove the caliper from the brake disc.
Loosen securing bolt -4- with a 5 mm hexagon socket wrench.
Remove brake disc.
Attention: Internally ventilated brake discs are balanced. Under no circumstances should the balancing brackets on the inner diameter be removed or replaced.
Installation
In order to guarantee uniform braking on both sides, both brake discs must have the same wear pattern and roughness depth. Therefore, it is imperative to replace or grind both brake discs.
In the workshop, the brake discs can be checked for runout. The maximum measured value of the runout of the brake surface of the installed disc must not exceed 0.2 mm
Measure disc thickness.
If there is rust on the brake disc flange and front wheel hub, remove it with a wire brush.
Remove protective varnish from new brake discs with a nitro thinner.
Slide the brake disc onto the wheel hub and secure with a socket head cap screw. First turn the brake disc so that the bolt holes in the disc and the hub match.
Attach brake shield with caliper and installed brake linings.
Attention: If the brake hose has not been disconnected, make sure that it does not twist and stretch. Check the freedom of movement of the brake hose when turning the steered wheels to the stop.
Screw on brake shield with lightly greased bolts and tighten to 110 Nm.
Put the wheels of the car in a straight ahead position. Attach the brake hose to the coupling head and secure with the union nut. Make sure that the brake hose does not twist when doing this. Check the freedom of movement of the brake hose when turning the steered wheels to the stop.
Remove air from brake system.
Screw on the front wheels. Do not grease wheel bolts. Attach the wheels so that the combed ones before removing the uterus coincide. Lower vehicle, tighten wheel bolts crosswise to 100 Nm.
Turn the role wheel to the left and right as far as it will go and boil, and the brake hose of a car standing on wheels follows all the movements of the wheel without touching any details.
Caution: Depress the brake pedal strongly repeatedly until strong resistance is felt. In this case, the brake linings are adjacent to the discs and occupy a position that meets the operating conditions.
Check the level of brake fluid in the compensation bank and, if necessary, top up the level to the MAX uterus.
Attention. Run a security compliance check:
- Are the brake hoses tight?
- Is the brake hose in the holder?
- Are the air bleed valves tight?
- Is there enough fluid in the brake system?
- With the engine running, perform a leak test. To do this, act on the brake pedal with a force of 200 to 300 N for about 10 seconds (from 20 to 30 kg). Do not release the brake pedal. Boil all connections for tightness.
Note: Brake fluid must be disposed of as special waste.