Manual Bleeding
NOTE:
Manual bleeding procedures for Bronco and "E" & "F" Series vehicles are not available from manufacturer, but should be similar to other manual bleeding procedures.
- 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. On Explorer and Ranger, 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 to absorb escaping brake fluid (on Aerostar, bleed longest line first). Slowly push brake pedal down to force out air. With pedal fully depressed, tighten fittings to prevent air from being sucked into master cylinder when pedal is released. Release pedal.
- 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. If pedal is not firm, 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 about3/4 turn. Slowly push down brake pedal completely.
- Close bleeder fitting, and return pedal to fully 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 under BLEEDING SEQUENCE. See Fig 2. When bleeding is complete, fill master cylinder to proper level.