You will need a caliper to get the job done.
1. We install the car on a viewing hole or overpass (see "Vehicle preparation for maintenance and repair").
2. To check the condition of the hydraulic brake drive, an assistant will be required, who must vigorously press the brake pedal 3-4 times and keep it pressed during the test, thereby creating pressure in the system. If leaks are found in the joints, tighten their fasteners.
Blisters should not form on the surface of the brake hoses, if there are, we replace the hose. Hoses, regardless of their condition, are recommended to be replaced after five years of vehicle operation, because. the hose, due to the aging of the rubber, may burst during braking. Brake pipes must not have dents or cracks. Otherwise, they must be replaced (see "Brake pipes - replacement").
3. Check the condition of the front wheel brakes. To do this, remove the wheel (see "Wheel - replacement") and visually evaluate and, if necessary, measure the thickness of the friction linings of the brake pads. If the lining thickness is less than 1.5 mm, we replace the brake pads of the right and left wheels (see "Front wheel brake pads - replacement"). We remove the brake caliper and evaluate the condition of the brake disc. If deep grooves or cracks form on the working surface of the disc, it must be replaced (see "Front wheel brake mechanism - disassembly").
Since the brake pads are not adjacent to the disc over its entire surface, a shoulder is formed at the outer edge of the disc. This must be taken into account when measuring the brake disc thickness.
We measure the thickness of the brake disc with a caliper or micrometer.
If the thickness of the working surface of the disk has become less than 9.5 mm, it must be replaced (see "Front wheel brake mechanism - disassembly").
4. Check the condition of the rear wheel brakes.
Having removed the plug on the brake shield, visually assess the thickness of the friction lining of the brake shoe. If the lining thickness is less than 1.5 mm - we replace the pads, moreover, the right and left brake mechanisms (see "Rear wheel brake pads - replacement").
To inspect the remaining parts of the brake mechanism, remove the brake drum (see "Rear wheel brake pads - replacement").
Inspect the working surface of the brake drum. With a strong wear of the surface and an increase in its inner diameter to 251 mm, we replace the drum.
Attention! Do not press the brake pedal with the brake drum removed, as this will cause the pistons to be squeezed out of the working cylinder.
Assess the condition of the working cylinder. Leakage of brake fluid from under the protective anthers of the cylinder is not allowed.