Fragment of the section of the front disc brake caliper
1 - brake caliper; 2 - piston; 3 - rubber sealing ring; 4 - protective anti-dust cuff; 5 - friction segments
Front wheel brakes disc, caliper, single-piston finger (they are usually called "with floating pads"). The principle of operation of the brakes is based on the fact that during braking, fluid pressure acts on a piston located in the caliper, which, moving, presses the friction segment against the disc. The reaction to this force acts on the bottom of the working cylinder, shifting the caliper in the opposite direction, and thereby the opposite friction segment is pressed against the back side of the disc. The gap between the disc and the friction segment after the release of the brakes is set automatically due to the springing of the sealing ring in the cylinder.
Worn friction segments are replaced with similar, of the same brand and designation and always on both front brakes at the same time (4 pieces). The friction material does not contain asbestos. In order for the brake to work well, the clamp must move without a hitch in the guide pins.
The travel surfaces are covered with rubber cuffs, which must be monitored so that they are not damaged.
The front wheel rims are made from gray cast iron castings. The discs always provide for the presence of cavities for air cooling from the inside.