Master Cylinder

Component Bleeding






Master Cylinder

WARNING: Do not use any fluid other than clean brake fluid meeting manufacturer's specification. Additionally, do not use brake fluid that has been previously drained. Following these instructions will help prevent system contamination, brake component damage and the risk of serious personal injury.

WARNING: Carefully read cautionary information on product label. For EMERGENCY MEDICAL INFORMATION seek medical advice. For additional information, consult the product Material Safety Data Sheet (MSDS) if available. Failure to follow these instructions may result in serious personal injury.

NOTICE: Do not allow the brake master cylinder reservoir to run dry during the bleeding operation. Keep the brake master cylinder reservoir filled with clean, specified brake fluid. Never reuse the brake fluid that has been drained from the hydraulic system. Damage to the brake system components may occur.

NOTICE: Do not spill brake fluid on painted or plastic surfaces or damage to the surface may occur. If brake fluid is spilled onto a painted or plastic surface, immediately wash the surface with water.

NOTE: When any part of the hydraulic system has been disconnected for repair or installation of new components, air can enter the system and cause spongy brake pedal action. This requires bleeding of the hydraulic system after it has been correctly connected. The hydraulic system can be bled manually or with pressure bleeding equipment.

NOTE: When a new brake master cylinder has been installed or the system has been emptied, or partially emptied, it should be primed to prevent air from entering the system.

1. Place a box-end wrench on the master cylinder bleeder screw and attach a rubber drain hose to the bleeder screw. Submerge the free end of the rubber hose into the master cylinder reservoir.

2. Fill the master cylinder reservoir with clean, specified brake fluid.

3. Have an assistant pump the brake pedal until clear fluid flows from the rubber hose, without air bubbles.

4. Tighten the master cylinder bleeder screw to specification. Refer to Specifications.
- Remove the rubber hose.

5. Bleed the brake outlet tubes at the brake master cylinder as follows:

1. Have an assistant pump the brake pedal, and then hold firm pressure on the brake pedal.

2. Loosen the rear most brake tube fittings until a stream of brake fluid comes out. While the assistant maintains pressure on the brake pedal, tighten the brake tube fitting to specification. Refer to Specifications.

3. Repeat this operation until clear, bubble-free fluid comes out.

4. Fill the brake master cylinder reservoir with clean, specified brake fluid as necessary. Repeat the bleeding operation at the front brake tube.