F 350 4WD Pickup V8-7.3L DSL Turbo VIN F (1994)
Brake Bleeding: Service and Repair
Priming Brake System
When a brake master cylinder (2140) has been installed, or the brake system emptied or partially emptied, fluid may not flow from the wheel cylinder
bleeder screws during normal bleeding. It may be necessary to prime the brake master cylinder using the following procedure:
1. Use a tubing wrench to remove the front brake tube (2264) 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 (2K478) with new Ford High-Performance DOT 3 Brake Fluid C6AZ-19542-AA or -BA or DOT 3
equivalent meeting Ford specification ESA-M6C25-A.
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.
4. Have an assistant pump the brakes until clear, bubble-free fluid flows from both brake tubes.
5. Remove the short brake tubes and reinstall the front brake tube and brake master cylinder outlet rear tube (2B253) 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 (2455) 10 times and then hold firm pressure on the brake pedal.
b.Loosen the rearmost brake tube fittings 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 fittings.
7. If any of the brake tubes, disc brake calipers (2B120), or rear wheel cylinders have been removed, it may be helpful to prime the system by gravity
bleeding. This should be done after the brake master cylinder is primed and bled. To gravity bleed the brake system:
a. Fill the brake master cylinder with new Heavy-Duty Brake Fluid C6AZ-19542-AA or -BA or DOT 3 equivalent meeting Ford specification
ESA-M6C25-A.
b. Loosen both of the wheel cylinder bleeder screws and leave them open until clear brake fluid flows. Be sure to check the brake master
cylinder reservoir fluid level often and do not let it run dry.
c. Tighten the wheel cylinder bleeder screws (2208) to 7-9 Nm (61-87 in lb).
d. One at a time, loosen the caliper bleeder screws. Leave the bleeder screws open until clear fluid flows. Check the fluid level often in the
brake master cylinder reservoir and do not let it run dry.
e. Tighten the caliper bleeder screws to 17-24 Nm (12-17 ft lb).
8. After the brake system has been primed, bleed the brake system at each wheel (1007).
