Brake disc replacement

If there are scuffs, deep scratches and other defects on the working surface of the disc that increase pad wear and reduce braking efficiency, as well as in case of increased lateral runout of the disc, causing vibration during braking, replace the disc. In specialized workshops, such a disc can be machined and polished on both sides to the same depth, but after processing, the thickness of the disc must not be less than the minimum allowable value.

The minimum permissible thickness of the brake disc of the front wheel brake mechanism is 23 mm. If one of the discs is less than specified, replace both discs. When replacing brake discs, be sure to replace the brake pads with a new set.

You will need: socket head «at 15», wrench for wheel nuts.

1. Remove the wheel from the side of the disc being replaced.



2. Remove the caliper assembly (see «Replacing the caliper assembly with the guide pads»), without disconnecting the brake hose, and secure it with wire without twisting or pulling the hose.



3. Remove the brake disc.


4. Similarly remove a brake disk of the second brake mechanism.

5. Install the parts in the reverse order of removal.

Note. Before installing the disc, carefully clean the mating surfaces of the hub and disc from rust and scale, as even the smallest particle sandwiched between the mating surfaces will cause the disc to beat and vibrate when braking.

Note. If you are installing an old disc, file off the shoulders on the working surfaces of the disc, formed as a result of wear on the disc on both sides, with a file.