enhanced vibration or incorrect operation of the brake pedal when you press it;
presence of abnormal sounds during braking;
increase of the braking distance.
Causes of the brake discs malfunctions
constant exposure of elements with water;
critical wear;
brake shoes with pads of low quality;
mechanical damage;
sporty driving style.
Diagnostics
It is recommended to diagnose the brake disc condition using a special measuring tool - a vernier caliper. The difference in the thickness of a new and a worn disc in most cases is about 1-3 mm. In turn, the maximum run-out is just a few hundredths of a millimeter. The measurement should be done in the work area. The run-out is determined by using a special device with an indicator that captures values even 0.01 mm.
Repair and replacement of brake discs
The requirements of the majority of car manufacturers indicate: brake discs are only to be replaced, not repaired. However, there is equipment that will eliminate some of the defects. Minor surface deformations of the part can be eliminated by grooving. This will shorten the process of lapping the new pads and increase the efficiency of the brake system. In the grooving into minimum material layer is withdrawn on both sides of the disc. In the case of run-out this item must be replaced. Please note that the repair or replacement of the brake disc is more efficiently and reliably performed by professionals.
Brake discs replacement - instructions, descriptions and repair
