Bench Bleeding Procedures

Fig. 36 Common Means Of Bench Bleeding A Master Cylinder:

When replacing or overhauling a master cylinder it is advisable to bench bleed it before installing it on the car.
1. Properly support master cylinder assembly and attach special bleeding tubes as shown.
2. Fill reservoir with approved brake fluid.
3. Using a wooden stick or dowel, (cars with power brakes) depress pushrod slowly and allow the pistons to return under pressure of the springs. Do this several times until all air bubbles are expelled.
4. Remove bleeding tubes from cylinder and install cover and gasket.
5. Install master cylinder onto vehicle, refer to Brakes and Traction Control/Brakes/Hydraulic System/Master Cylinder, Brakes/Service and Repair.
6. Bleed the entire hydraulic system as described previously.