Malfunction | Cause | Remedy |
Too much brake pedal play | Partially or completely worn out brake pads | Adjust brakes or replace pads |
One of the brake circuits has failed | Check circuits for brake fluid leakage | |
Disc brakes: | ||
Large gap at friction linings (possibly with new calipers or after a long parking of the car) | Remove the pads, press the brake pedal, thereby squeezing out the pistons. Press in pistons and install friction linings | |
The brake pedal is deeply pressed and springy | Air in the brake system | Bleed the system |
Insufficient amount of brake fluid in the expansion tank | Add brake fluid | |
The brakes are ineffective. Brake pedal fails | Leaky brake lines or hoses | Tighten pipe and hose connections, replace leaks |
Cuffs of the main brake cylinder or brake cylinders of wheels are damaged | Replace cuffs and internal parts of the brake master cylinder | |
Disc brakes: | ||
Fixed O-ring damaged | Adjust brake caliper | |
Poor braking performance despite strong pedal pressure | Oiled friction linings | Replace pads |
Incorrect friction linings installed | Replace pads with branded ones | |
Disc brakes: | ||
Worn friction linings. The pads rise at the spreader plate | Replace pads | |
Vehicle pulls to one side when braking | The tire pressure is not correct. Uneven tire wear | Check tire pressure and bring it back to normal, replace worn tires |
Oiled friction linings | Replace pads | |
Friction linings of various types are installed on one axle | Replace pads with branded ones | |
Small contact patch of friction linings | Replace pads | |
Disc brakes: | ||
Dirty brake caliper | Clean the seating and guiding surfaces of the brake pads in the caliper | |
Corrosion in wheel brake cylinders | Replace corroded brake calipers | |
Uneven wear of friction linings | Replace both pads of this suspension | |
Drum brakes: | ||
Difficult stroke of pistons in wheel brake cylinders | Find and replace the defective cylinder | |
Brakes work spontaneously | Clogged compensation hole in the brake master cylinder | Clean the brake master cylinder and replace its internal parts |
The gap between the pusher and the piston of the main brake cylinder is too small | Check clearance | |
Brakes get hot while driving | Clogged compensation hole in the brake master cylinder | Clean the brake master cylinder and replace its internal parts |
The gap between the pusher and the piston of the main brake cylinder is too small | Check clearance | |
Disc brakes: | ||
Compensation hole clogged | Clean the master cylinder, replace its internal parts and brake fluid | |
Drum brakes: | ||
Weak brake pad return springs | Replace springs | |
Brakes vibrate | Disc brakes: | |
Corrosion in some parts of the brake disc | Thoroughly sand the disc | |
Too much wheel bearing play | Adjust backlash | |
Drum brakes: | ||
Worn brake pads, protruding rivets | Replace pads with branded ones | |
The brake drum has deviations from the round shape | Rebore the drum, replace if necessary | |
Friction linings stick to the brake disc | Disc brakes: | |
Corrosion in wheel brake cylinders | Repair or replace a corroded brake caliper | |
Brakes squeak | Influence of weather conditions (high air humidity) | It should not be a cause for concern if the squeak appears after the car has been parked for a long time in high humidity, but disappears after the first braking |
Disc brakes: | ||
Incorrect friction linings installed | Replace pads with branded ones | |
The brake disc rotates in a plane that is not parallel to the caliper | Check caliper mating surfaces | |
Drum brakes: | ||
Wrong brake pads installed | Replace pads with branded ones | |
The rivets on the brake pads are loose, the pads do not fit snugly | Replace pads | |
Clogged wheel brakes | Clear the brakes | |
Weak return springs | Replace springs | |
Wedge-shaped wear of friction linings | Disc brakes: | |
The brake disc rotates in a plane that is not parallel to the caliper | Check caliper mating surfaces | |
The brake pedal vibrates | Disc brakes: | |
Too much wheel bearing play | Replace bearings | |
Lateral runout or too much variation in brake disc thickness | Check the runout and thickness of the disc over its entire surface, grind or replace the disc | |
The brake disc rotates in a plane that is not parallel to the caliper | Check caliper mating surfaces | |
Drum brakes: | ||
The brake disc is deformed due to uneven tightening of the wheel bolts | Tighten the bolts to the correct torque | |
Uneven contact surface of the wheel disk to the brake drum, resulting in a delay of the drum | Swap discs. Boring a brake drum with a mounted wheel on a special machine |
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