Figure 9.25. Removing the master brake cylinder: 1-pin connector; 2 - feed tank; 3 - cotter pin; 4 - brake pipes; 5 - nuts
- disconnect pin connector 1 (see figure 9.25) brake fluid level sensor;
- unscrew the cap of the feed tank 2;
- pump out the brake fluid from the reservoir using a syringe;
- open the air bleed valves on all brake mechanisms so that brake fluid comes out of them when you press the brake pedal;
- press and release the brake pedal until no more brake fluid comes out of each valve.
Fill the hydraulic drive with brake fluid in the following order:
Caution: Use only fresh brake fluid of the recommended brand or DOT4 brake fluid brand.
- replace the brake fluid by bleeding the hydraulic drive of all brake mechanisms in the sequence indicated below;
- when bleeding the hydraulic drive, ensure that the required level is maintained in the supply tank and constantly add brake fluid to it.
Remove air from the hydraulic drive in the following order:
- front left wheel;
- front right wheel;
- rear left wheel;
- rear right wheel.
After carrying out work involving the removal of the brake mechanism, bleed the hydraulic drive in the following order:
- the brake mechanism that was removed;
- front left wheel;
- front right wheel;
- rear left wheel;
- rear right wheel.
Note: When removing and installing the master brake cylinder, it is recommended to complete automatic bleeding with manual bleeding.
Vehicles equipped with ABS
Note: Hydraulic blocks are supplied filled with brake fluid.
If manual or automatic bleeding of the hydraulic drive of the brake system with ABS did not give the desired results, bleed using the TEP 92, DIAG 2000 diagnostic device, following the instructions supplied with it.
All cars
- - connect one end of the transparent tube to the air bleed valve, lower the other end into a transparent container with brake fluid poured into it;
- press the brake pedal slowly;
- hold the brake pedal down, while your assistant should unscrew the bleed valve - some of the brake fluid will spill into the container;
- close the bleed valve after the pedal hits the floor;
- release the brake pedal;
- repeat the above operations until clean brake fluid, free of air bubbles, starts to flow out;
- perform the same operations on the remaining brake mechanisms in the sequence indicated above.