Master Cylinder Bleeding
STANDARD PROCEDURE - MASTER CYLINDER BLEEDING1. Clamp the master cylinder in a vise.
NOTE: Depending on master cylinder type (Bosch or Continental Teves, with or without ABS) refer to steps 2 - 5 for proper Bleeder Tube installation.
NOTE: On vehicles without ABS this procedure is designed to be performed with the proportioning valves installed in the master cylinder.
2. Bosch Master Cylinder without ABS - Attach four Bleeder Tubes, Special Tool 8358-1, to the four ports of the master cylinder (proportion valves installed) and tighten to 17 Nm (145 inch lbs.) torque (Fig. 70). Flex the Bleeder Tubes and position the open ends into the master cylinder reservoir so their outlets are below the surface of the brake fluid in the reservoir when filled.
3. Bosch Master Cylinder with ABS - Attach a Bleeder Tube, Special Tool 8358-1, to the primary port of the master cylinder and tighten to 17 Nm (145 inch lbs.) torque (Fig. 71). Attach a Bleeder Tube, Special Tool 8358-2, to the secondary port of the master cylinder and tighten to 17 Nm (145 inch lbs.) torque. Flex the Bleeder Tubes and position the open ends of the tubes into the master cylinder reservoir so their outlets are below the surface of the brake fluid in the reservoir when filled.
NOTE: Continental Teves 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 at the base of the reservoir neck (Fig. 72), sufficiently below the fluid level.
4. Continental Teves Master Cylinder without ABS - Attach the special tools for bleeding the master cylinder in the following fashion (Fig. 73):
a. Thread Adapter, Special Tool 8822-1, into the primary outlet port of the master cylinder without a proportioning valve. Tighten Adapter to 17 Nm (145 inch lbs.) torque.
b. Thread Adapter, Special Tool 8822-2, into the secondary outlet port of the master cylinder without a proportioning valve. Tighten Adapter to 17 Nm (145 inch lbs.) torque.
c. Thread a Bleeder Tube, Special Tool 8358-1, into each Adapter. Tighten Tube nuts to 17 Nm (145 inch lbs.) torque.
d. Thread a Bleeder Tube, Special Tool 8358-2, into each proportioning valve. Tighten Tube nuts to 17 Nm (145 inch 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.
5. Continental Teves Master Cylinder with ABS -Attach the special tools for bleeding the master cylinder in the following fashion (Fig. 74):
a. Thread Adapter, Special Tool 8822-1, into the primary outlet port of the master cylinder. Tighten Adapter to 17 Nm (145 inch lbs.) torque.
b. Thread Adapter, Special Tool 8822-2, into the secondary outlet port of the master cylinder. Tighten Adapter to 17 Nm (145 inch lbs.) torque.
c. Thread a Bleeder Tube, Special Tool 8358-1, into each Adapter. Tighten Tube nuts to 17 Nm (145 inch 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 (Fig. 72). 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 ends of the Bleeder Tubes stay below the surface of the brake fluid in reservoir at all times during the bleeding procedure.
6. Fill the brake fluid reservoir with fresh Mopar Brake Fluid DOT 3 Motor Vehicle, or equivalent.
7. Using an appropriately sized wooden dowel as a pushrod (Fig. 70) (Fig. 71) (Fig. 73) (Fig. 74), 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.
8. Remove the Bleed Tubes and Adapters from the master cylinder and plug the master cylinder outlet ports.
9. Install the fill cap on the reservoir.
10. Remove the master cylinder from the vise.
11. Install the master cylinder on the vehicle.