BMW 3 series E46

Since 1998 of release

Repair and car operation

Removal of air from brake system

After carrying out of repair of brake system in which result pipelines disappeared, air can get to system. In this case air is necessary for removing. In air presence in brake system specifies soft продавливание brake pedals. In this case негерметичность it is necessary to eliminate and remove air from system.

If air has got into hydrosystem ABS, from safety reasons to remove air follows on HUNDRED. It takes place at presence негерметичности in the hydraulic block or if the tank of a brake liquid has appeared emptied or if at air removal have forgotten to add in the tank a liquid.

Air from brake system leaves качательными movements of a pedal of a brake for what the help of the assistant is required.
On HUNDRED air from brake system leaves, as a rule, by means of the special device. By means of such device in system through the tank for a brake liquid pressure to 2.0 bar is created.

If it is necessary to remove air from all system, air separately leaves from each brake.

It becomes necessarily when air has got into each separate support. If one support was replaced or under repair only, as a rule, to remove air from a corresponding support enough.

Sequence of removal of air:

— A support the back right.
— A support the back left.
— A support the forward right.
— A support the forward left.

1 Remove a dustproof cap from the union for air removal. Clear the union, put on it a pure hose, other end of a hose lower in a bottle half filled with a brake liquid. The corresponding hose and capacity are available on sale.

2 Ask the assistant to press a pedal of a brake so much time, how many it is necessary for creation in pressure system. It is felt on resistance of a pedal of a brake.
3 As soon as pressure is reached, press a pedal a foot and do not release it.
4 Turn on on a half-turn the union for air removal накидным a key, for example HAZET I968-7 the Following liquid collect in a bottle. Watch that the hose end constantly was in a bottle below liquid level. If the system is opened, it is appreciable by a pliability of a pedal of a brake.
5 As soon as pressure of a liquid will start to fall, close the union.
6 Repeat process of a rating of system until in system pressure will not be created. Press a pedal of a brake and leave on it a foot. Open the union of removal of air. Open the union until pressure will start to fall. After that close the union.
7 Process of removal of air repeat until in the brake liquid arriving in capacity for prorolling, there will be no air bubbles.
8 After end of process of prorolling remove a hose from the union and put on the union a protective cap.

In the course of air removal periodically watch the tank for a brake liquid. Liquid level should not go down essentially. Otherwise air can get to system. Add in system necessarily only a new brake liquid!

9 Air from other supports leaves similarly.

10 After end of process of removal of air in the tank it is necessary to add a liquid to a mark "MOVE". Check up a condition of a sealing lining-1 covers of the tank.

11 After removal of air by pressing a pedal of a brake it not should leave system softly downwards. If it occurs, it is necessary to repeat process of removal of air once again.

— Whether brake hoses are fixed?
— Whether the brake hose in the holder is fixed?
— Whether unions for air removal are tightened?
— Whether enough of a brake liquid is filled in?
— On the working engine check up tightness. For this purpose press a brake pedal effort 200 – 300 Н (20 – 30 kg) during 10 with. The pedal should not weaken. Check up all joinings on tightness.

The brake liquid should not pour out or be thrown out with a household waste at all. Local authorities inform drivers on places of its possible recycling.

12 In summary execute some braking on road with неинтенсивным transport. Thus it is necessary to execute, at least, one strong braking with use ABS (learn on a pulsation of a pedal of a brake).

Thus watch attentively the following behind you transport.