Manual Bleeding
CAUTION:
DO NOT allow reservoir to run dry during bleeding operation. If brake fluid is spilled on vehicle paint, immediately rinse off with water.
NOTE:
Manual bleeding procedure for Bronco and "E" and "F" Series vehicles is not available from manufacturer. Procedure is similar to other models.
- Clean master cylinder cap and surrounding area. Remove cap. Explorer and Ranger models are equipped with dual type master cylinder. Aerostar has a cartridge type master cylinder. On Explorer and Ranger, bleed primary and secondary systems separately. Loosen primary or secondary master cylinder hydraulic line fitting. See Fig 1 .
- On Aerostar, loosen either master cylinder hydraulic line. On all models, wrap a cloth around brake lines (on Aerostar, bleed longest line first) to absorb escaping brake fluid. Push brake pedal down slowly, forcing air out. With pedal fully depressed, tighten fittings to prevent air from being sucked into master cylinder when pedal is released. Release pedal.
- Loosen fitting, and repeat procedure until air is completely purged from master cylinder. When all air has escaped, tighten fittings with pedal down. Release pedal and depress again. Pedal should be firm. If not, repeat bleeding procedure.
- On Aerostar, attach a rubber drain hose to bleeder fitting on front of master cylinder. Submerge hose in small container half filled with clean brake fluid. Open bleeder fitting. Loosen bleeder fitting about 3/4 turn. Slowly push brake pedal completely down.
- Close bleeder fitting, and return pedal to full released position. Repeat procedure until all air is purged from master cylinder. On all models, repeat procedure at bleeder fitting on rear anti-lock brake electro-hydraulic valve and each wheel cylinder. See BLEEDING SEQUENCE . See Fig 2 . When bleeding is complete, fill master cylinder to proper lever.