Figure 278. Installing and removing the brake caliper: 1 — bolt, 10 Nm; 2 — brake pad wear sensor wire; 3 — brake hose, 12–16 Nm; 4 - bolts, 175-205 Nm; 5 - brake cylinder
The work must be carried out as follows (figure 278):
- press the brake pedal several times to relieve the vacuum in the system. Place the vehicle on supports and remove the wheels;
- put one end of the hose on the bleed nipple, lower the other end into the prepared container;
- unscrew the union bolt and press the brake pedal until the fluid comes out;
- loosen the hex nut on the brake hose from the caliper so that it can then be easily unscrewed. Disconnect the hose from the brake line. To do this, unscrew the union nut of the pipeline, remove the hose clamp and pull out the hose. The hose connection to the cylinder should also be loosened. Protect open ends of hoses from dirt;
- unscrew bolt 1 (see figure 278) fastening the plug of the brake pad wear sensor and remove the wire;
- loosen both caliper mounting bolts as described above and lift the caliper. Remove the brake pad from the disc side;
- by turning, unscrew the caliper from the brake hose connection;
- if necessary, remove the brake caliper bracket after unscrewing bolts 4.
Installation must be carried out in reverse order, taking into account the following:
- when tightening the brackets, use new self-locking bolts. They are made specifically for the mounting frame. Tighten the bolts to a torque of 175–205 N·m;
- screw the caliper onto the brake hose almost to the stop. Final tightening is carried out with the caliper installed;
- install the pads and brake cylinder as described above;
- tighten the brake hose to a torque of 12–18 N·m. Make sure that the hose does not twist. Otherwise, remove the caliper again and wrap the hose tighter around it. Check that the line and hose do not rub against other parts of the front suspension;
- bleed the brakes.