BMW 3 series E30

Since 1983-1994 of release

Repair and car operation

+ 1. The maintenance instruction
+ 2. Maintenance service
+ 3. The engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. An exhaust system
+ 8. Transmissions
+ 9. Coupling
- 10. Brake system
   10.2. Specifications
   10.3. Antiblocking system (ABS)
   10.4. Колодки disk brakes
   10.5. A support of a disk brake
   10.6. A brake disk
   10.7. Колодки drum-type brakes
   10.8. The main cylinder of brakes
   10.9. The vacuum amplifier of brakes
   10.10. A cable () a manual brake
   10.11. Adjustment of a manual brake
   10.12. The mechanism of a manual brake
   10.13. A brake pedal
   10.14. The switch of a signal of braking
   10.15. Hoses and lines of a hydrodrive of brakes
   10.16. Removal of air from a hydrodrive of brakes
+ 11. A running gear
+ 12. A body
+ 13. An electric equipment
+ 14. A good advice

10.16. Removal of air from a hydrodrive of brakes

For effective work of brakes it is necessary to remove air from a hydrodrive (to pump over brakes). Necessity of prorolling arises after replacement of details of a hydrodrive of brakes. At dismantling of a hydrodrive of one wheel it is possible to be limited to prorolling only an understanding contour.

Removal of air from all system of brakes is carried out in sequence: the right back wheel, the left back, right forward, left forward.

1. Restore normal pressure in the vacuum amplifier of brakes for what press about 30 times a pedal on the stopped engine.
2. Uncover a tank and add a liquid. At prorolling watch liquid level, add a liquid without supposing strong fall of level.

3. Turn away the union of the right back wheel and slightly tighten. Attach to the union a hose, other end of a hose lower in a transparent vessel with a brake liquid.
4. Ask the assistant to press some times a pedal of a brake and to keep. On cars with antiblocking system it is necessary to press a pedal of a brake not less than 12 times (if special complete sets are applied to prorolling by one person be guided by the instruction applied on the complete set).
5. Turn away the union and after a stream of a liquid following with bubbles ослабнет, tighten the union. Ask the assistant to release a pedal.
6. Repeat procedure until then while in a following liquid vials will not cease to be observed. Tighten the union and check up liquid level in a tank.
7. Execute these actions on other wheel cylinders in specified above sequence. Upon termination of restore liquid level in a tank. After prorolling of brakes the pedal should be rigid.