BMW 3 series E30

Since 1983-1994 of release

Repair and car operation

10.16. Removal of air from a hydrodrive of brakes

THE GENERAL DATA

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.

PERFORMANCE ORDER

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.