The caliper is attached to the bracket 11 with two bolts 9, which are locked by bending the bolts of the locking plates to the edge. The bracket 11, in turn, is attached to the flange of the pivot pin 10 together with the protective cover 13 and the pivot arm. The caliper has a radial groove through which the brake disc 18 passes and two transverse grooves for accommodating brake pads 16. The lugs of the caliper have two windows with guide grooves in which two opposite cylinders 17 are installed. To fix the cylinder relative to the caliper, a spring lock is installed in the cylinder 4, included in the side groove of the caliper.
Each cylinder has a piston 3 (1), which is sealed with an elastic rubber ring 6 (3). It is located in the groove of the cylinder and tightly compresses the surface of the piston. The cylinder cavity is protected from contamination by a rubber cap 7 (2).
The working cavities of the cylinders are interconnected by a pipeline 2 (5). Fitting 1 is screwed into the outer cylinder (6) for bleeding the front brake drive circuit, to the inner one - a hose fitting for supplying fluid.
Piston 3 rests against brake pads 16, on which friction linings 5 are glued. The pads are mounted on pins 8 and are pressed against them by springs 15 (7). Pins 8 are held in the cylinder by cotter pins 14
The brake disc 18 is attached to the wheel hub with two dowel pins.
When braking, the pistons under fluid pressure move out of the wheel cylinders and press the brake pads against the brake disc. When moving, the pistons carry along the sealing rings 6, which are twisted. When released, when the pressure in the drive drops, the pistons are pushed back into the cylinders due to the elastic deformation of the rings. In this case, the pads 5 will be in light contact with the disk 18.
When the lining is worn, when the gap in the brake mechanism increases, the pistons under fluid pressure slip relative to the rings 6 and take a new position in the cylinders, which provides an optimal gap between the pads and the disc.