Inspection and replacement
There are 6 types of front brake mechanisms, which can be classified into 3 groups (type A, type B and type C). Check the type of brake mechanism before starting work because the operating procedure differs depending on the type of mechanism.
A type: Nissin mechanism
B type: Akebono mechanism (for 14" and 15" wheel rims)
With type: Akebono mechanism (for 13" wheel rims)
Note:
- Nissin movement and Akebono movement can be identified by the Nissin mark applied to the Nissin movement case.
- Front brake disc OD for 14" and 15" wheel rims: 262 mm
- Front brake disc OD for 13" wheel disc: 240 mm
Type A and Type B:
Note: For type C operating procedure, see below.
Warning
- Never use an air hose or dry brush to clean brake components.
- Use a vacuum cleaner to avoid inhaling brake dust.
1. Loosen the front wheel nuts slightly, then raise the car and secure it on safe stands.
2. Remove the brake hose fasteners from the steering knuckle.
3. Remove the mechanism bolt and turn the mechanism over.
Note: Check the hoses and axle boots for damage or destruction.
4. Remove the brake pad plates, pad holders and pads.
Note: When the brake mechanism is equipped with an outer plate, replace the plate together with the shoe as an assembly.
5. Using a caliper, measure the thickness of each brake lining.
Brake lining thickness:
Standard
For 13" wheel rim: 8.5-9.5 mm
For 14" and 15" wheel rims: 9.5-10.5 mm
Operating values: 1.6 mm
Note: Measurements do not include the thickness of the pad mounting plate.
6. If the brake lining thickness is less than the service values, replace the entire front pads.
7. Clean the mechanism thoroughly, remove rust and check for grooves and cracks.
8. Check the brake disc for damage and cracks.
9. Install the brake shoe holders.
10. Apply grease to the points indicated by the arrows in the figure below.
Note: Use the pad grease included in the kit or M77 grease (Molikot) and apply a thin layer of grease even to the specified points.
- Piston and contact surface of the inner shoe
- The shoe and the contact surface of the mechanism support
- External cover and contact surface of the mechanism housing. Mechanism with a control plate of the external shoe
- Control plate of the shoe and the contact surface of the outer shoe Control plate of the shoe and the contact surface of the mechanism body
11. Install the brake pads and pad plates correctly.
Warning
- When reusing pads, always install them in their original position to prevent loss of braking effectiveness.
- Contaminated brake discs or pads reduce braking efficiency. Remove grease from discs and pads.
Note: Install the pad with the wear indicator on the inside.
12. Push the piston in until the mechanism sits on top of the shoes. Make sure the piston boot is in a position to prevent damage when turning over.
13. Turn the mechanism down into place, then install the bolt and tighten it.
Warning: Be careful not to damage the axle boot when rotating the mechanism downwards.
14. Install the brake hose brackets to the steering knuckle.
Note: Inspect the brake hose for snagging or twisting.
15. Press the brake pedal several times to make sure the brakes work, then test drive the car.
Note: Applying the brakes may require more pedal travel immediately after replacing the pads. A few pumps of the brake pedal will restore normal pedal travel.
16. After installation, check hoses and line connections or connectors for leaks and tighten if necessary.
Type C:
Warning
- Never use an air hose or dry brush to clean brake components.
- Use a vacuum cleaner to prevent dust from entering your respiratory tract.
1. Loosen the front wheel nut slightly, then raise the car and secure it on safe stands.
2. Remove the brake hose mount from the steering knuckle.
3. Remove bolt B from the mechanism and turn the mechanism upside down.
Note: Check the hoses and axle boots for damage or destruction.
4. Remove the brake pad plate, pad holders and pads,
Note: When replacing the pad, replace the plate with the pad as a set.
5. Using a caliper, measure the lining thickness of each brake shoe.
Brake lining thickness:
- Standard: 8.5-9.5 mm
- Operating values: 1.6 mm
Note: Measurements do not include the thickness of the pad mounting plate.
6. If the brake lining thickness is less than the service value, replace the front pads as a set.
7. Clean the mechanism thoroughly, remove rust and check for grooves and cracks.
8. Check the brake disc for damage and cracks.
9. Install the brake shoe holders.
10. Apply grease to the points indicated by the arrows in the figure below.
Note: Use the pad grease included in the kit or M77 grease (Malikot) and apply a thin layer of grease even at the designated points.
- Piston and contact surface of the inner shoe
- Shoe and contact surface of mechanism bracket
- External shoe and contact surface of the mechanism body
- Outer shoe plate and outer shoe contact surface
- The outer shoe plate and the contact surface of the mechanism body
11. Install the brake pads and pad plate correctly.
Warning
- When reusing pads, always install them in their original position to prevent loss of braking effectiveness.
- Contaminated brake discs or pads reduce brake performance. Remove grease from discs and pads.
Note: Install the pad with the wear indicator on the inside.
12. Push the piston in until the mechanism sits on top of the shoes. Make sure that the piston boot is in a position that prevents damage when turning the mechanism down.
13. Turn the mechanism down into place, then install bolt B and tighten it.
14. Install the brake hose bracket onto the steering knuckle.
Note: Inspect the brake hose for pinching or twisting.
15. Press the brake pedal several times to make sure the brakes work, then test drive the car.
Note: Applying the brakes may require more pedal travel immediately after replacing the pads. A few pumps of the brake pedal will restore normal pedal travel.
16. After installation, check hoses and line connections or connectors for leaks and tighten if necessary.