Master Cylinder Bleeding

MASTER CYLINDER BLEEDING

NOTE: On vehicles without ABS this procedure is designed to be performed with the proportioning valves installed in the master cylinder.

1. Clamp the master cylinder in a vise.





NOTE: Master Cylinder without ABS - In the following step the last substep states to submerge the ends of the Bleeder Tubes in a jar filled with brake fluid instead of the master cylinder reservoir. That is because all four Bleeder Tubes will not fit through the slot (2) at the base of the reservoir neck (1), sufficiently below the fluid level.




2. Master Cylinder without ABS - Attach the special tools for bleeding the master cylinder in the following fashion:
a. Thread Adapter (2), Special Tool 8822-1, into the primary outlet port of the master cylinder without a proportioning valve. Tighten Adapter to 17 Nm (145 in. lbs.) torque.
b. Thread Adapter (4), Special Tool 8822-2, into the secondary outlet port of the master cylinder without a proportioning valve. Tighten Adapter to 17 Nm (145 in. lbs.) torque.
c. Thread a Bleeder Tube (3), Special Tool 8358-1, into each Adapter. Tighten Tube nuts to 17 Nm (145 in. lbs.) torque.
d. Thread a Bleeder Tube (6), Special Tool 8358-2, into each proportioning valve (5). Tighten Tube nuts to 17 Nm (145 in. lbs.) torque.
e. Flex and place the open ends of the Bleeder Tubes into a clear jar containing enough fresh brake fluid to submerge the ends on the Bleeder Tubes. Do not completely fill the jar with fluid or fluid being bled from master cylinder will overflow jar.




3. Master Cylinder with ABS - Attach the special tools for bleeding the master cylinder in the following fashion:
a. Thread Adapter (4), Special Tool 8822-1, into the primary outlet port of the master cylinder. Tighten Adapter to 17 Nm (145 in. lbs.) torque.
b. Thread Adapter (3), Special Tool 8822-2, into the secondary outlet port of the master cylinder. Tighten Adapter to 17 Nm (145 in. lbs.) torque.
c. Thread a Bleeder Tube (2), Special Tool 8358-1, into each Adapter. Tighten Tube nuts to 17 Nm (145 in. lbs.) torque.
d. Flex each Bleeder Tube and place open end into the neck of the master cylinder reservoir, down through the slot at the base of the neck. Position the open ends of the tubes into the reservoir so their outlets are below the surface of the brake fluid in the reservoir when filled.

NOTE: Make sure the ends of the Bleeder Tubes stay below the surface of the brake fluid in the reservoir at all times during the bleeding procedure.

4. Fill the brake fluid reservoir with fresh Mopar(R) Brake Fluid DOT 3 Motor Vehicle, or equivalent.
5. Using an appropriately sized wooden dowel as a pushrod, slowly press the pistons inward discharging brake fluid through the Bleeder Tubes, then release the pressure, allowing the pistons to return to the released position. Repeat this several times until all air bubbles are expelled from the master cylinder bore and Bleeder Tubes.
6. Remove the Bleed Tubes and Adapters from the master cylinder and plug the master cylinder outlet ports.
7. Install the fill cap on the reservoir.
8. Remove the master cylinder from the vise.
9. Install the master cylinder on the vehicle.