Disc brakes
1. Mark the position of the wheel disk relative to the hub so that the balanced wheel can be installed in its original place. Loosen the wheel bolts.
2. Raise the car, remove the wheels.
3. Visually check the thickness of the brake pads - without the main metal plate - from the front through the brake piston housing. If in doubt, remove the brake pads and measure the thickness with a caliper.
4. The wear limit of disc brake pads is reached when the lining has a thickness of 1 mm (up to 9/89.) or 2 mm (since 10/89 issue.). The value applies only to the overlay without the base.
5. If the wear limit is reached, replace the brake pads. Be sure to replace all pads on one axle.
Note: According to the unspoken rule, 1 mm of brake pad thickness corresponds to a distance of 1000 km. This rule applies to severe operating conditions. Under normal conditions, the pads last much longer. With a disc brake pad thickness of 5.0 mm (not counting the back plate) its resource is at least another 4000 km.
(The full text is on the website: www.MazBook.ru)
5. Install the wheels, taking into account the mark on the hub, lower the car and tighten the wheel nuts crosswise with force 100 Nm.
Drum brakes
1. Raise the rear of the vehicle.
2. Remove the brake drum, see Chapter Brake system, Sections Removal and installation rear brake shoes/brake drum, Removal and installation the wheel brake cylinder.
3. Measure the thickness of the linings with a caliper. The wear limit is reached if the lining has a thickness of 1 mm (without metal block).
4. If the wear limit is reached, the brake pads must be replaced. It is essential to replace all pads on one axle.
5. Measure the inner diameter of the brake drum with a caliper. The limit is worn if the inner diameter of the drum exceeds 201 mm.
6. Install the brake drum, see Chapter Brake system, Sections Removal and installation rear brake shoes/brake drum, Removal and installation the wheel brake cylinder.
7. Install the rear wheels, taking into account the marks on the hubs. Lower the car and tighten the wheel nuts crosswise with force 100 Nm.
Visual inspection of brake lines
1. Raise the car.
2. Clean the brake lines with cold cleaner.
Caution! To protect against corrosion, the brake pipes are coated with a polymer layer. Damage to this layer may lead to corrosion of the pipes. Therefore, the brake pipes must not be cleaned with a wire brush, sandpaper or screwdriver.
3. Check the lines from the main brake cylinder to the wheel brake cylinders using a lamp. The main brake cylinder is located in the engine compartment under the brake fluid expansion tank.
4. Brake pipes should not be bent or flattened. They should also not have rusty or worn areas. Otherwise, the pipe should be replaced to the next connection point.
5. Brake hoses connect the brake pipes to the wheel cylinders on the moving parts of the car. They are made of high-strength material, but over time they can crack, wear out, or get cut by sharp objects. In this case, they should be replaced.
6. Bend the brake hoses from side to side and check for damage. The hoses should not be twisted, pay attention to the colored lines, if any.
7. Turn the steering wheel from side to side. The brake hoses should not touch any parts of the car in any position.
8. The connection points of the brake pipes and hoses must not be wet due to oozing brake fluid.
Caution! If the expansion tank and gaskets are wet due to brake fluid, this does not necessarily indicate a faulty master cylinder. Most often, brake fluid leaks through the hole or gasket in the expansion tank cap.
9. Lower the vehicle.