E 250 3/4 Ton Van V8-5.4L CNG VIN M (1997)
Brake Bleeding: Service and Repair
Pressure Bleeding
CAUTION: Never exceed 344 kPa (50 psi) pressure or damage to brake system may occur.
DESCRIPTION
For pressure bleeding, use a bladder-type bleeder tank only, such as Rotunda Brake Bleeder 104-00064 or equivalent. Bleed the longest tubes first.
The bleeder tank should contain enough new brake fluid to complete the bleeding operation. Use High Performance DOT-3 Motor Vehicle Brake
Fluid C6AZ-19542-AB or equivalent fluid meeting Ford specification ESA-M6C25-A and DOT 3. Never reuse brake fluid that has been drained
from the hydraulic system. The tank should be charged with approximately 69-206 kPa (10-30 psi) of air pressure.
PROCEDURE
1. Clean all dirt from the master cylinder reservoir cover.
2. Remove the brake master cylinder reservoir cover. Fill the master cylinder reservoir with the specified brake fluid. Install the pressure bleeder
adapter tool to the brake master cylinder and attach the bleeder tank hose to the fitting on the adapter. Master cylinder pressure bleeder adapter
tools can be obtained from various manufacturers. Follow the instructions of the manufacturer to install the adapter.
3. If the rear wheel cylinders (the secondary brake system) are to be bled, use a suitable box wrench on the bleeder fitting at the RH rear brake wheel
cylinder. Attach a hose snugly around the bleeder fitting to drain discharged fluid into a container.
4. Open the valve on the bleeder tank to admit pressurized brake fluid into the brake master cylinder reservoir.
5. Submerge the free end of the discharge hose in a container partially filled with clean brake fluid and loosen the bleeder fitting.
6. When air bubbles cease to appear in the fluid at the submerged end of the bleeder tube, close the bleeder fitting. Remove the tube. Replace rubber
dust cap on bleeder screw.
7. Attach a discharge hose and repeat Steps 4, 5 and 6 at the LH rear wheel cylinder.
8. On front brakes, repeat Steps 4, 5 and 6 starting at the RH disc brake caliper and ending at the LH disc brake caliper.
9. When the bleeding operation is completed, close the bleeder tank valve and remove the tank hose from the adapter fitting.
10. After disc brake service, make sure disc brake pistons are returned to their normal positions and the shoe and lining assemblies are properly seated.
This is accomplished by depressing the brake pedal several times until normal pedal travel is established. Check pedal feel. If brake pedal feels
spongy, repeat bleed procedure.
11. Remove the pressure bleeder adapter tool from brake master cylinder. Fill the brake master cylinder reservoir to between MAX line and 4 mm
(0.16 inch) below MAX line. Install the brake master cylinder filler cap.
