Master Cylinder Bench Bleeding
| 1. |
Secure the mounting flange of
the brake master cylinder in a bench vise so that the rear of the
primary piston is accessible. |
| 2. |
Remove the master cylinder
reservoir cap and diaphragm. |
| 3. |
Install suitable fittings to
the master cylinder ports that match the type of flare seat
required and also provide for hose attachment. |
| 4. |
Install transparent hoses to
the fittings installed to the master cylinder ports, then route the
hoses into the master cylinder reservoir (1). |
| 6. |
Ensure that the ends of the
transparent hoses running into the master cylinder reservoir are
fully submerged in the brake fluid. |
| 7. |
Using a smooth, round-ended
tool, depress and release the primary piston as far as it will
travel, a depth of about 25 mm (1 in) ,
several times. Observe the flow of fluid coming from the
ports. |
| |
As air is bled from the primary and secondary pistons, the
effort required to depress the primary piston will increase and the
amount of travel will decrease. |
| 8. |
Continue to depress and
release the primary piston until fluid flows freely from the ports
with no evidence of air bubbles. |
| 9. |
Remove the transparent hoses
from the master cylinder reservoir (1). |
| 10. |
Install the master cylinder
reservoir cap and diaphragm. |
| 11. |
Remove the fittings with the
transparent hoses from the master cylinder ports. Wrap the master
cylinder with a clean shop cloth to prevent brake fluid
spills. |
| 12. |
Remove the master cylinder
from the vise. |
|
