Table of contents: Disconnecting pipelines ↓ Disconnecting the brake hoses ↓
Warning! Brake fluid is poisonous. In addition, it has a destructive effect on paintwork.
To prevent brake fluid from leaking from the system when disconnecting a line or hose, do the following before disconnecting it.
Unscrew the bleed nipple of the corresponding brake circuit.
Put the hose on the fitting. Lower the free end of the hose into the container.
Press the brake pedal all the way down and secure the pedal in this position by supporting it with a wooden block of appropriate length. The openings through which the brake fluid is supplied to the master brake cylinder are thus blocked and the brake fluid will not leak out.
To disconnect and then attach the pipes and hoses, you need the appropriate wrench. To hold the hoses from turning, you need another 14 spanner.
After performing work on the brake system hydraulics, the system itself must be bled. Usually, it is sufficient to bleed the brake circuit on which the corresponding work was performed.
Disconnecting pipelines
1. Unscrew the union nut of the pipeline. The opposite nut (brake hose) hold it with another key to prevent it from turning (see illustration 10.1).
If the pipeline nut is rusted and turns together with the pipeline, then such a pipeline should be replaced. In this case, cut the pipeline near the nut. Then unscrew the nut itself with a hex socket.
2. Secure the new pipe to the appropriate holders.
3. Bleed the brake system.
Disconnecting the brake hoses
4. Unscrew the union nut of the brake hose. The opposite nut (pipelines) hold it with another key to prevent it from turning.
The brake hose can be secured to the body with a bracket-shaped holder that prevents the hose from shifting. Do not forget to secure the hose in this bracket after completing the work.
When installing hoses, first secure the end of the hose that has an external thread. Do not allow the hoses to twist. Use the color strip on the hose as a guide.
5. Bleed the brake system.
6. Make sure that none of the hoses will become chafed while the vehicle is moving.
The original source of the article can be found on the website AudiManual.ru