Caliper fluid seal damage
The fluid seal (piston seal) [A] is placed around the piston to maintain clearance between the pad and the disc. If the seal is in a poor condition, it could lead the pad to wear excessively or the brake to drag, which may cause the temperature of the discs or the brake fluid to increase.
Replace the fluid seal if it exhibits any of the conditions listed below.
- Brake fluid leakage around the pad.
- Brakes overheat.
- Considerable difference in inner and outer pad wear.
- Seal and piston are stuck together.
★ If the fluid seal is replaced, replace the dust seal [B] as well. Also, replace all seals every other time the pads are changed.
![]() Front Caliper [G] | ![]() Rear Caliper [H] |
Caliper dust boot and friction boot damage
Check that the dust boot [C] and friction boot [D] are not cracked, worn, swollen, or otherwise damaged.
If they show any damage, replace it.
Caliper piston and cylinder damage
Visually inspect the piston [E] and cylinder surfaces.
★ Replace the caliper if the cylinder and piston are badly scored or rusty.
Caliper holder shaft wear
The caliper body must slide smoothly on the caliper holder shafts. If the body does not slide smoothly, one pad will wear more than the other, and constant drag on the disc may cause the temperature of the discs or the brake fluid to increase.
Visually inspect that the caliper holder shafts [F] are not badly worn or bent.
★ If the caliper holder shafts are damaged, replace the entire caliper assembly.