Figure 284. Removing and installing the rear brake caliper: 1 — brake pad wear sensor wire mounting bolt, 10 Nm; 2 — brake pad wear sensor; 3 — brake hose, 12–16 Nm; 4 - brake cylinder; 5 — caliper mounting bolts, 105–115 N·m
Work on removing the rear caliper must be carried out as follows: (figure 284):
- unscrew the brake fluid reservoir cap;
- press the brake pedal several times to relieve the vacuum in the system. Place the rear of the vehicle on supports (under the rear axle) and turn the wheels away;
- put the hose on the bleed nipple, lower the other end of the hose into the prepared container;
Loosen the union bolt and press the brake pedal until the fluid comes out;
- loosen the hex nut on the brake hose from the caliper until it can be easily removed. You can also 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 284) fastening the plug of the sensor 2 wear pads and remove the wire;
Figure 285. Brake caliper mounting bolts (105–115 N·m)
- unscrew both bolts 5 of the caliper mount. These bolts are shown in the picture 285;
- turn and unscrew the caliper from the brake hose connection.
Installation must be carried out in reverse order, taking into account the following:
- when tightening the caliper, use new self-locking bolts. They are made specifically for the caliper, i.e. you need to order them specifically. Tighten the bolts to a torque of 105–115 N·m;
- screw the caliper onto the brake hose almost to the stop. Final tightening is carried out with the caliper installed;
- tighten the brake hose to a torque of 12-16 N·m. In doing so, 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 rear suspension;
- bleed the brakes.