In addition to the hydraulic foot brake, the rear wheel disc brakes can also be actuated by the hand brake cables. By means of the lever to which the brake cable is attached, the brake piston is pressed against the pad by the pusher.
It should be noted that the rear wheel brakes in front-wheel drive and all-wheel drive models differ in the type of handbrake cable swivel, but otherwise we are talking about the same brakes.
Automatic adjustment
In cars, automatic adjustment of disc brakes is structurally determined: as the lining wears, the brake piston simply moves further out of the brake caliper housing and ensures that the linings constantly adhere to the brake disc. Due to the brake fluid flowing in after it, the gap is not formed.
This is not the case with mechanical handbrake control: here the handbrake pusher will never reach the piston that is far outward unless additional adjustment is made. She «lengthens» pusher according to need.
The basis of the adjustment is a thread, along which the second part is unscrewed forward as the lining wears - so the pressure device becomes longer. Therefore, when replacing the linings, the brake piston cannot simply be pressed back, it must be screwed onto the adjusting mechanism.
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