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Home >> Ford >> 1990 >> Bronco II 4WD, Standard, M5OD-R1 >> Repair and Diagnosis >> Transmission >> Clutches >> Service (In-Vehicle) >> Hydraulic System Bleeding

Hydraulic System Bleeding

  1. Clean area around reservoir cap. Fill reservoir with DOT 3 brake fluid. Place hose on bleeder screw to prevent brake fluid entering bellhousing. Loosen bleed screw and maintain fluid level in reservoir.
  2. Fluid and bubbles will flow from hose attached to slave cylinder bleeder screw. Close bleeder screw when fluid stream is free of air bubbles. Ensure proper fluid level and install reservoir cap.
  3. Place light pressure on clutch pedal and open bleeder screw. Maintain pressure until pedal contacts the floor. Close bleeder screw while pedal is fully depressed. DO NOT  allow pedal to return before bleeder screw is fully closed. Recheck fluid level.
  4. On Aerostar models, check Red supply tube for air bubbles while clutch pedal is being operated slowly. If air exists, tap on tube so air will rise to master cylinder reservoir. System should now be fully bled and working properly.
  5. On all models, test system operation by starting vehicle, depressing clutch and placing gearshift in Reverse. No grinding should be heard or felt with clutch pedal within 1/2" (13 mm) of floor. If noise is heard, check for air in system. Repeat bleeding procedure if necessary.
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