Disc Brake System: Testing and Inspection

1. Disassemble the front brake pad assembly and take out the drive shaft.





2. Set the special tool to the front hub assembly as shown in the illustration.





3. Measure hub torque (A) with brake pads removed to measure brake drag torque.

NOTE: Tighten the rotor nuts in order to secure the disc to the hub.





4. Start engine and hold brake pedal down for 5 seconds. Pedal depression force is approximately 196 N (44 lbs.)
5. Stop engine and turn brake disc forward 10 times.
6. Measure brake drag torque "B" with spring scale (with the brake pads installed).
7. Calculate the drag torque of the disc brake (difference between brake torque "B" and hub torque "A"). Standard value is 69 N (15.4 lbs.) or less.
8. If the difference between brake drag torque and hub torque exceeds the standard value, disassemble piston and clean the piston. Check for corrosion or worn piston seal, and check the silding condition of the lock pin and guide pin.
9. Install brake pad assembly and drive shaft.