E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
- 10. Brake system
   10.2. Specifications
   10.3. Anti-blocking system (ABS)
   10.4. Blocks of disk brakes
   10.5. Support of a disk brake
   10.6. Brake disk
   10.7. Blocks of drum-type brakes
   10.8. Main cylinder of brakes
   10.9. Vacuum amplifier of brakes
   10.10. Cable (ы) hand brake
   10.11. Adjustment of the hand brake
   10.12. Mechanism of the hand brake
   10.13. Brake pedal
   10.14. Switch of a signal of braking
   10.15. Hoses and lines of a hydraulic actuator of brakes
   10.16. Air removal from a hydraulic actuator of brakes
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice


10.4. Blocks of disk brakes



Blocks of brakes should change at the same time, both on lobbies and on back wheels.

Otkidyvaniye of a support for removal of blocks of a forward brake

Sensor of wear of a block of a forward brake

For removal of the sensor beat out a pin (shooter).

Piston cave-in in the support cylinder

1. Uncover (and) a tank and remove two thirds of liquid.
2. Lift a forward (back) part of the car and establish on supports.
3. Remove a forward (back) wheel. Working at a brake of one wheel, you can use a brake of another as a sample.
4. Check a condition of a brake disk. If polishing is necessary, remove a disk.
5. Unscrew bolts.
6. If it is necessary to remove a brake disk, unscrew bolts of fastening of an arm of a support. At an otvorachivaniye of a bolt of fastening of a support it is necessary to hold a support axis.
7. Remove a support, the sensor of wear of blocks and an internal block. Then establish an internal block on the piston and completely drown the piston in the cylinder by means of a clamp.
8. Disconnect the socket of the sensor of wear of blocks.
9. Holding directing, unscrew bolts of fastening of a support.
10. Remove an external brake shoe.
For a support of a back brake
11. Disconnect the socket.
12. Remove caps and unscrew bolts.
13. Remove an antinoise spring.
14. Drown the piston by means of a clamp.
15. Remove a support and an internal block.
16. Remove an internal brake shoe.
17. Fix a support a wire.
18. Remove an external brake shoe.


The quantity and design of antinoise slips and some other details for different models can differ. Therefore it is recommended to remember previously an arrangement of slips and other details that at assembly not to break an order of their installation.

19. Check a condition of the sensor of wear of a block (on a forward left wheel (shooter), or on forward left and back the right). If sensors in a normal state, establish them on new blocks. At detection of damages sensors replace.
20. Installation is carried out upside-down. Tighten support bolts with the set moment.

If necessary replace bolts.

21. Upon termination of press several times a brake pedal. The pedal should settle down at former height and should be rigid. Check liquid level. Be convinced of absence of leaks and check work of brakes before car operation.

After change of blocks avoid sharp braking throughout the first several hundred km of run.