The brake mechanism of the rear wheel is drum type, with self-aligning pads, which are driven by a wheel hydraulic cylinder 7 (pic. 146).
Brake pads 8 with pads 2, wheel cylinder and other parts of the brake mechanism are mounted on shield 11, which is attached to the flange of the rear axle beam (see fig. 79). A package of plates is attached to the bottom of the shield with two rivets, one of which is a support for the lower ends of the brake pads. Eccentrics 9 are used to adjust the gap between the shoes and the drum (see fig. 146), on which the pads are supported under the action of coupling springs 12 and 6.
In building 7 (pic. 147) The wheel cylinder contains two pistons 4, which are bursting by a spring 6 with support cups 2. Stops are pressed into the pistons, into the grooves of which the upper ends of the brake shoes rest. The exit of the pistons from the cylinders is protected by rubber caps 5. The tightness of the cylinder is ensured by seals 3. There is a fitting 1 in the cylinder for pumping the rear brake drive.
When the brake pedal is released, the brake shoes are retracted from the brake drum by spring 6 (see fig. 146) until it stops in the adjusting eccentrics 9. When the brake pedal is pressed in the rear brake drive circuit, fluid pressure is created, under the influence of which the pistons of the wheel cylinder diverge and press the brake shoes 8 to the drum. In this case, the spring 6 is stretched. Due to the forces of friction between the pads and the drum, the pads self-align in the drum, which ensures more uniform wear of the linings along the entire length.