- Raise the front of the car and place it on stands.
- Remove the front wheels and temporarily tighten the brake discs with two wheel nuts.
- Unscrew the two bolts shown in Figure 237 and remove the brake caliper. Leave the caliper on the hose, but secure it to a piece of wire so that it does not sag.
Pic. 237. Removing and installing the brake caliper cylinder
- The brake pads are now free. There is a metal plate on the outside. Pull out the parts one by one and immediately mark the sides from which they are removed, since you may have to install the same pads again. Figure 238 shows the removed parts. Please note that the washer (8) Installed only on vehicles with 14-inch wheels. The shape of the washers on cars with 13-inch wheels is different.
Pic. 238. To remove and install brake pads. 1. Brake hose; 2. Bolt 25 Nm; 3. Brake pad support brackets; 4. Brake pad wear indicator brackets; 5. Seal; 6. Overlay; 7. Brake pad support brackets; 8. Trim, engine 3S - FE; 9. Overlay; 10. Brake pad; 11. Mounting frame; 12. Mounting frame bolts, 90 Nm
- Brake pads must be replaced as a set and to equalize wear, never move brake pads from one side to the other.
- Clean the removed parts of the brake caliper and check that there are no traces of rust on the working surfaces of the brake pads (if necessary, brush with a wire brush). Check the thickness of the remaining material. To do this, you can use a depth gauge or ruler, as shown in Figure 239. If one of the brake pads soon reaches 1.0 mm in thickness, the entire brake pad set must be replaced. This is also done when some pads are still in good condition.
Pic. 239. Measuring the thickness of a brake pad with a measuring ruler
- Install the parts shown in Figure 238 in the caliper mounting frame. First, install the 4 brake pad guide plates in the locations shown in Figure 240. The wear sensor must be replaced. It has an arrow that should point in the direction of rotation of the brake disc. Figure 241 shows the correct position of the wear indicator. The spacer washers must also be replaced.
Fig.240. Insert the 4 brake pad support plates in the indicated locations.
Pic. 241. Correct installation of the brake pad wear sensor.
- Installation is carried out in reverse order using Figure 238.
- Insert the brake pad into the guides. At the same time, ensure correct seating of the spacer washers.
- Open the air bleed valve and at the same time press the piston into the cylinder bore with the handle of a hammer. Do not use metal objects for this. If this can be done, you will not have to bleed the air from the brake system. Otherwise, you should suck out the brake fluid from the reservoir, since during this work the liquid will flow out of the overfilled reservoir.
- Position the brake caliper cylinder without damaging the rubber seals so that the bolts can be inserted.
- Tighten the bolts to a torque of 25 Nm.
- After lowering the vehicle, press the brake pedal several times to move the brake pads to the brake discs. Remember that new brake pads need to break in and do not provide full braking performance at first.