Front brake mechanism.
1 - guide pin, 2 - dust cover, 3 - bleeder valve, 4 - caliper, 5 - cuff, 6 - piston, 7 - boot, 8 - caliper bracket, 9 - lamellar retainer, 10 - anti-squeak gasket, 11 - brake shoe.
Replacement of brake pads
1. Jack up the car, remove the bolts and remove the front wheel.
2. Through the control hole in the caliper, check the thickness of the brake pads. Replace pads if necessary.
- Nominal Thickness: 11mm
- Minimum thickness: 2mm
3. Raise the caliper.
- A) Remove guide pins.
- b) Raise the caliper and secure it as shown.
Attention: do not disconnect the brake hose from the caliper.
4. Remove the brake pads, pads and plate retainers.
5. Measure the thickness of the brake pad lining at the point of greatest wear.
- Nominal Thickness: 11mm
- Minimum thickness: 2mm
If the thickness of the brake pad lining is less than the minimum value, replace the brake pads.
Wear of brake pads
1 - lining wear indicator, 2 - lining, 3 - brake disc.
Attention:
- If a brake pad needs to be replaced, replace the entire set of brake pads on the left and right sides of the vehicle. Do not install brake pads of different types or different manufacturers in the same set.
- All four brake pads must be replaced as a set.
- When replacing brake pads, check for deformation. When replacing plate retainers for brake pads, install a new or used retainer only after cleaning it of foreign particles.
- If there is a noticeable difference in the thickness of the brake pads on the left and right sides, then check the smooth movement of the piston, guide and locking pins.
6. Install the brake pad retainers into the caliper bracket.
7. Install the brake pads.
Note: Install the brake pad with the lining wear indicator facing up.
8. Press the piston into the caliper with a hammer handle or similar.
9. Establish a boot in a support.
Note: be careful not to damage the boot.
10. Install two guide pins.
- Tightening torque: 22-32 Nm
11. Install the front wheel and tighten the bolts.
- Tightening torque: 90-110 Nm
Withdrawal
1. Jack up the car, remove the bolts and remove the front wheel.
- Tightening torque: 90-110 Nm
2. Disconnect the brake hose from the caliper.
- Tightening torque: 7-13 Nm
3. Remove the brake assembly.
Disassembly
1. Turn away directing fingers and disconnect a support from bracket.
- Tightening torque: 22-32 Nm
2. Using a screwdriver, remove the anther ring.
3. Remove the boot from the caliper.
4. Using compressed air, remove the piston.
Caution: Do not place your fingers in front of the piston when applying compressed air.
5. Using a screwdriver, remove the cuff.
Warning: Be careful not to damage the cylinder walls.
Examination
1. Clean the outer surface of the piston and the inner surface of the cylinder with brake fluid.
2. Check the brake cylinder for wear, damage and rust.
3. Check the inside diameter of the cylinder.
- Nominal inner diameter: 57.2 mm
4. Check the piston surface for wear, damage and rust.
5. Check the brake pads for deformation and damage.
6. Check for damage to the pad wear indicator.
7. Check the thickness of the brake disc.
- A) Using a micrometer, measure the thickness of the brake disc at eight points approximately every 45°at a distance of 10 mm from the outer edge of the disc.
- Nominal Thickness: 24.5mm
- Minimum Thickness: 22.4mm
- b) Calculate the difference between the maximum and minimum values of the thickness of the brake disc obtained in p. "A". Make sure that the maximum difference does not exceed the allowable value.
- Brake disc thickness difference: 0.005mm
- V) If the obtained values do not correspond to the technical data, then replace the disk with a new one.
8. Check the outer diameter of the brake disc.
- Brake Disc Outer Diameter: 257mm
9. Check brake disc runout
- A) Using a dial gauge, measure brake disc runout approximately 5 mm from the outer edge of the disc.
- Limit value: 0.03 mm
- b) If the brake disc runout is out of specification, replace the disc.
Assembly
Assembly is carried out in the reverse order of disassembly.
Installation
1. Install the brake mechanism in the reverse order of removal, the tightening torques of the bolts and nuts are indicated in the text of the description of the removal procedure.
2. After installation, bleed the brake system.