Cause | Method of elimination |
Too much free travel of the brake pedal | |
| One brake circuit failed | Check the tightness of the brake circuits |
The brake pedal is pressed far and springy | |
| Air in the brake system | Bleed the brake system |
| Too little brake fluid in the expansion tank | Add new brake fluid, bleed air |
| Blisters most often form as a result of heavy loads, such as when descending in the mountains | Replace brake fluid, bleed air |
The braking effect is reduced, the brake pedal is pressed all the way | |
| The pipeline is leaky | Tighten the pipe connections or replace the pipe |
| The cuff of the main or brake cylinder of the wheel is damaged | Replace the cuff, replace the internal parts of the master brake cylinder, if necessary, replace the master brake cylinder |
| Disc brake specific: stationary rubber sealing ring is damaged | Overhaul the brake mechanism |
Poor braking effect despite strong pressure on the brake pedal | |
| The brake linings are oily | Replace brake pads |
| Incorrect or hardened brake pads | Replace brake pads, install brake pads VW |
| The brake booster is faulty | Check the brake booster |
| Especially for disc brakes: brake pads are worn out | Replace brake pads |
When braking, the car pulls to the side | |
| The tire pressure is not normal | Check and adjust tire pressure |
| The tires are worn unevenly | Replace worn tires |
| The brake linings are oily | Replace brake pads |
| Different types of brake pads on one axle | Replace brake pads. Install brake pads VW |
| Poor contact patch of brake pads | Replace brake pads |
| Especially for disc brakes: brake shafts are dirty (saddles or frames) | Clean the mounting locations and guide surfaces in the brake mechanism |
| Corrosion in brake cylinders | Replace brake mechanisms |
| Uneven wear of brake linings | Replace brake pads (on both wheels) |
| Especially for drum brakes: heavy piston stroke in the brake cylinder | Restore the brake cylinder |
The brake works by itself | |
| The compensation hole of the master brake cylinder is clogged | Clean the master brake cylinder, replace the internal parts at the service station |
| The clearance between the working rod and the piston of the master brake cylinder is too small | Check the gap |
Brakes get hot while driving | |
| The compensation hole of the master brake cylinder is clogged | Clean the master brake cylinder, replace internal parts at the service station |
| The clearance between the working rod and the piston of the master brake cylinder is too small | Check the gap |
| Especially for disc brakes: the throttle hole of the special support valve is clogged | Clean the master cylinder, replace the internal parts and change the brake fluid |
| Especially for drum brakes: brake shoe return springs are weak | Replace return springs |
The brakes are rattling | |
| Brake pads do not comply with the above | Replace brake pads, install brake pads VW |
| Especially for disc brakes: disc brakes are corroded in places | Carefully level the disc with a grinding stone |
| Lateral Brake Disc Fight | Improve or replace the brake disc |
| Especially for drum brake: brake linings are worn out | Replace brake pads, install brake pads VW |
| The brake drum is not round | Turn and replace the brake drum if necessary |
The brake pads do not come off the brake disc, the wheels rotate with difficulty by hand | |
| Especially for disc brakes: corrosion in brake cylinders | Overhaul the brake mechanism, replace |
Uneven wear of brake linings | |
| Especially for disc brakes: brake pads do not meet the above | Replace brake pads, install brake pads VW |
| The brake mechanism is dirty | Clean the brake surfaces |
| The pistons are moving with difficulty | Restore ease of movement of pistons |
| The brake system is leaking | Check the tightness of the brake system |
Conical wear of brake linings | |
| Especially for disc brake: the brake disc does not rotate parallel to the brake mechanism | Check the mating surface of the brake mechanism |
| Corrosion in the brake mechanism | Remove pollution |
| The pistons are not working well | Check piston adjustment (piston ring) |
The brakes are squeaking | |
| Environmental influence (air humidity) | No need to eliminate (if the creaking appears after the car has been standing for a long time in high humidity, but then disappears after the first braking) |
| Specially for disc brake: brake pads do not match | Replace brake pads, install brake pads VW |
| The brake disc is not parallel to the brake mechanism | Check the mating surface of the brake mechanism |
| The shafts in the brake mechanism are dirty | Clean the brake shafts |
| The brake shoe retaining springs are bent | Replace the retaining springs |
| The spacer springs are stretched | Pull out the spacer springs |
| Especially for drum brakes: brake linings do not fit tightly | Replace brake pads |
| The brakes are dirty | Clean the brakes |
| The return springs are too weak | Replace return springs |
The brakes are pulsating | |
| ABS is working | No need to eliminate |
| Especially for disc brake: lateral impact or too large tolerance of brake disc thickness | Check the fight and tolerance, bring the disk up to standard or replace it |
| The brake disc is not parallel to the brake mechanism | Check the contact surface of the thermocouple mechanism |
| Especially for drum brake: the contact surface of the disc to the brake drum is uneven, the brake drum is bent | Try swapping the disks between each other; it is better to turn the brake drum together with the wheel screwed to it on a lathe |
The original information is posted on the resource (vwmanual.ru)
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