Removal and Replacement

DISC BRAKE ASSEMBLY








REMOVAL AND INSTALLATION

Required Special Tool:
* MB990520: Disc Brake Piston Expander

INSTALLATION SERVICE POINT

]]A[[ BRAKE DRAG FORCE CHECK








1. In order to measure the brake drag force, measure the hub torque with the pads removed by the following procedure.

Use a spring scale to measure the hub torque in the forward direction. Record hub torque with pads removed.

CAUTION: Do not let any oil, grease or other contamination get onto the friction surfaces of the pads and brake discs.

2. After re-installing the caliper support to the knuckle, install the pad clips and the pads to the caliper support.





3. Clean the piston and insert into cylinder with special tool M B990520.
4. Be careful that the piston boot does not become caught, when lowering the caliper assembly and installing the lock pin bolt.
5. Check the brake drag force as follows.
(1) Start the engine and hold the brake pedal down for 5 seconds. [Pedal depression force: approximately 200 N (45 pound)]
(2) Stop the engine.
(3) Turn the brake disc forward 10 times.








(4) Use a spring scale to measure the hub torque with pads installed in the same direction as earlier.
(5) Calculate the drag force of the disc brake [difference between hub torque with pads installed and hub torque with pads removed].
Standard value:
[Front] 64 N (14 pounds) or less
[Rear] 54 N (12 pounds) or less
6. If the brake drag force exceeds the standard value, disassemble and clean the piston. Check for corrosion or worn piston seal, and check the sliding condition of the lock pin and guide pin.

INSPECTION

BRAKE DISC CHECK
^ Disc wear, refer to Disc Brake Rotor Check.
^ Disc run-out, refer to Disc Brake Rotor Check.