Ranger 2WD V6-245 4.0L VIN X SFI (1997)
Brake Master Cylinder: Service and Repair
Master Cylinder, Brakes
Bleeding
1. Use a tubing wrench to remove the front brake tube and the brake master cylinder outlet rear tube from the brake master cylinder.
2. Install short brake tubes in the brake master cylinder and position them so that they curve into the brake master cylinder reservoir, and the ends of
the tubes are submerged in brake fluid.
3. Fill the brake master cylinder reservoir with new High Performance DOT 3 Brake Fluid C6AZ-19542-AB or DOT 3 equivalent meeting Ford
specification ESA-M6C25-A, DOT 3.
4. Have an assistant pump the brakes until clear, bubble-free fluid flows from both brake tubes.
CAUTION: Brake fluid is harmful to painted and plastic surfaces. If brake fluid is spilled onto a painted or plastic surface, immediately wash it
with water.
5. Remove the short brake tubes and reinstall the front brake tube and brake master cylinder outlet rear tube on the brake master cylinder.
6. Bleed each brake tube at the brake master cylinder using the following procedure:
a. Have an assistant pump the brake pedal 10 times and then hold firm pressure on the brake pedal.
b. On the brake master cylinder, loosen the rear most brake tube fitting with a tubing wrench until a stream of brake fluid comes out. Have an
assistant maintain pressure on the brake pedal until the brake tube fitting is tightened again.
c. Repeat this operation until clear, bubble-free fluid comes out from around the tube fitting. Refill the brake master cylinder reservoir as
necessary.
d. Repeat this bleeding operation at the front brake tube fitting.
Overhaul
DISASSEMBLY
1. Clean the outside of the brake master cylinder and remove the brake master cylinder filler cap and diaphragm. Drain and discard any brake fluid
that remains in the brake master cylinder.
Removing Snap Ring
2. Depress the primary piston and remove snap ring from retaining groove at the rear of the master cylinder bore.
Primary Piston Assembly
3. Remove primary piston assembly from the master cylinder bore. Inspect for seal damage or twisting. Discard assembly.
