Rear Disc Brake Pad Check and Replacement

REAR DISC BRAKE PAD CHECK AND REPLACEMENT





1. Check brake pad thickness through caliper body check port.
Standard value: 10 mm (0.39 inch)
Limit: 1.0 mm (0.04 inch)

CAUTION: When the limit is exceeded, the brake pads on both the left and right wheels must be replaced as a set.

CAUTION: If there is a significant difference in the thickness of the pads on the left and right sides, check the sliding condition of the piston, lock pin sleeve and guide pin sleeve.





2. Remove the lower guide pin caliper bolt. Lift caliper assembly and retain with wire.

CAUTION: Do not contaminate or wipe off the special grease that is on the guide pin.

3. Remove the brake pads parts from the caliper support.





4. Measure hub torque (A) with pads removed to measure brake drag torque. Torque value (A) will be used later to calculate brake drag force with the pads installed.

NOTE: To secure the disc to the hub, tighten the nuts.





5. Clean the piston; then use the special tool to push the piston into the cylinder (caliper).
6. Be careful that the piston boot does not catch and tear as the caliper assembly and guide pin locking bolts are installed.
7. Check brake drag torque as follows.
1) Start engine and hold brake pedal down for 5 seconds.
[Pedal depression force: approximately 196 N (44 lbs.)]





2) Stop engine.
3) Turn brake disc forward 10 times.
4) Check brake hub torque (B) with spring scale.
5) Calculate the drag torque of the disc brake [difference between hub torque (B) and hub torque (A)].
Standard value: 69 N (15.4 lbs.) [4 Nm (35 inch lbs.)] or less
8. If the difference between brake drag torque and hub torque exceeds the standard value, disassemble piston and clean piston. Check for corrosion or worn piston seal, and check the sliding condition of the lock pin and guide pin.