Brake Bleeding: Service and Repair

BLEEDING

CAUTION: Use only brake fluid DOT 3 or DOT 4. Never mix the specified brake fluid with other fluid as it will affect the braking performance significantly.

MASTER CYLINDER BLEEDING
The master cylinder has no check valve, so if bleeding is carried out by the following procedure, bleeding of air from the brake pipeline will become easier. (When brake fluid is not contained in the master cylinder.)
1. Fill the reserve tank with brake fluid.
2. Keep the brake pedal depressed.





3. Have another person cover the master cylinder outlet with a finger.
4. With the outlet still closed, release the brake pedal.
5. Repeat steps 2 - 4 three or four times to fill the inside of the master cylinder with brake fluid.

DISC BRAKE BLEEDING

CAUTION: Take care not to contact the parts or tools to the caliper because the paint of caliper will be scratched. And if there is brake fluid on the caliper, wipe it off quickly.





Connect a vinyl tube to the outer end of the air bleeder screw to bleed the circuit of air. Then, connect the vinyl tube to the inner end and bleed the circuit of air. Except for these, the conventional procedures shall be followed. After the circuit has been bled of air, tighten both air bleeder screws securely.

BRAKE LINE BLEEDING

CAUTION: Be sure to filter/strain the brake fluid being added to the master cylinder reservoir tank. Debris may damage the hydraulic unit.





Start the engine and bleed the air in the sequence shown in the figure.