Bleeding the Brake System
When any part of the hydraulic system has been disconnected for repair or
replacement, air may get into the lines and cause spongy pedal action (because
air can be compressed and brake fluid cannot). To correct this condition, it is
necessary to bleed the hydraulic system so to be sure all air is purged.
When bleeding the brake system, bleed one brake cylinder at a time, beginning
at the cylinder with the longest hydraulic line (farthest from the master
cylinder) first. ALWAYS Keep the master cylinder reservoir filled with brake
fluid during the bleeding operation. Never use brake fluid that has been drained
from the hydraulic system, no matter how clean it is.
The primary and secondary hydraulic brake systems are separate and are bled
independently. During the bleeding operation, do not allow the reservoir to run
dry. Keep the master cylinder reservoir filled with brake fluid.
- Clean all dirt from around the master cylinder fill cap, remove the cap and
fill the master cylinder with brake fluid until the level is within 1/4 I n.
(6mm) of the top edge of the reservoir.
- Clean the bleeder screws at all 4 wheels. The bleeder screws are located on
the top of the brake calipers.
- Attach a length of rubber hose over the bleeder screw and place the other
end of the hose in a glass jar, submerged in brake fluid.
- Starting at the right rear proceed in this order left front, left rear and
- Open the bleeder screw 1/2 - 3/4 turn. Have an assistant slowly depress the
- Close the bleeder screw and tell your assistant to allow the brake pedal to
return slowly. Continue this process to purge all air from the system.
- When bubbles cease to appear at the end of the bleeder hose, close the
bleeder screw and remove the hose.
- Check the master cylinder fluid level and add fluid accordingly. Do this
after bleeding each wheel.
- Fill the master cylinder reservoir to the proper level.