Brake Line Bleeding
The brake fluid has a very low compression coefficient so
that almost all the movement of the brake lever or pedal
is transmitted directly to the caliper for braking action. Air,
however, is easily compressed. When air enters the brake
lines, brake lever or pedal movement will be partially used
in compressing the air. This will make the lever or pedal feel
spongy, and there will be a loss in braking power.
Air in the brake lines diminish braking performance
and can cause an accident resulting in injury or
death. If the brake lever has a soft or "spongy" feel-
ing mushy when it is applied, there might be air in
the brake lines or the brake may be defective. Do
not operate the vehicle and service the brake sys-
The procedure to bleed the front brake line is as follows.
Bleeding the rear brake line is the same as for the front
Level the brake fluid reservoir.
Reservoir Cap [B]
Check that there is plenty of fluid in the reservoir.
Slowly pump the brake lever several times until no air
bubbles rise up from the bottom of the reservoir.
Bleed the air completely from the master cylinder by this
Remove the rubber cap [A] from the bleed valve on the
Attach a clear plastic hose [B] to the bleed valve on the
caliper, and run the other end of the hose into a container.