The hydraulic system should be bled to remove all air whenever air enters the system. This occurs if the fluid level has been allowed to fall so low that air has been drawn into the master cyclinder. Under normal circumstances, air should not enter the system when the quick-disconnect hydraulic line fittings are disconnected. The procedure is very similar to bleeding a brake system, but depends mainly on gravity, rather than the pumping action of the pedal, for the bleeding effect.
1. Be sure master cyclinder is filled to the top with new brake fluid conforming to specification.
2. Raise the vehicle and place it securely on jackstands to gain access to the bleeder valve, which is located on the left side of the clutch housing.
3. Remove the dust cap which fits over the bleeder valve and push a lenght of clear plastic hose over the valve. Place the other end of the hose into a container.
4. Open the bleeder valve. Fluid will run from the master cylinder, down the hydraulic line, into the release cylinder and out through the clear plastic tube. Let the fluid run out until it is free of bubbles. NOTE: Don't let the fluid level drop too low in the master cylinder, or air will be drawn into the hydraulic line and the whole process will have to be started over.
5. Close the bleeder valve.
6. Have an assistant slowly depress the clutch pedal and hold it. Open the bleeder valve on the release cylinder, allowing fluid to flow through the hose. Close the bleeder valve when the flow stops. Once closed, release the pedal.
7. Slowly press and release the pedal five times, waiting for two seconds each time the pedal is released.
8. Fill the fluid reservoir.
9. The clutch should now be completely bled. If it isn't repeat steps 1-9.
10. Continue this process until all air is evacuated from the system, indicated by a solid stream of fluid being ejected from the bleeder valve each time with no air bubbles in the hose or container.
11. Install dust cap and lower vehicle.
12. Check fluid level.
Wednesday, October 24th, 2007 AT 4:05 PM