Comanche 4WD L6-242 4.0L VIN S MFI (1992)
Brake Bleeding: Service and Repair
Base Brake System Bleeding
1.
Fill master cylinder to within 1/4 inch of each reservoir rim.
2.
Bleed right rear wheel as follows:
a. Install a rubber hose on bleeder screw and submerge free end of hose in a transparent container partially filled with clean brake fluid.
b. Open bleeder screw 3/4 turn, then have an assistant depress brake pedal to the floor. Close bleeder screw, then slowly release pedal.
c. Repeat procedure until fluid flows clear and free of air bubbles. Always maintain a fluid level in master cylinder while bleeding brakes.
3.
Bleed left rear, right front, then left front brake, in that order, using same procedure as used for right rear brake.
4.
On 1988 Comanche models, after bleeding system, rear brake by-pass line must be bled as follows:
a. Open a front caliper bleed fitting and depress brake pedal to floor. This will shuttle by-pass differential valve and allow fluid to flow through
by-pass line. Brake warning in instrument panel will illuminate when ignition is in On position. This signals shuttling of valve.
b. Re-bleed rear brake cylinders with front caliper bleed fitting open.
c. After bleeding rear brake cylinders, entire system must be bled again using steps 3 and 4.
5.
On all models, fill master cylinder to within 1/4 inch of reservoir rims.
6.
Check brake operation and ensure pedal is firm, then road test vehicle. An improved brake fluid, Part No. 9082200215, is available for service
on all models. The new fluid is compatible with other fluids, and results in improved braking performance.
