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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 30 (Brake System - General Information -- F250-F550 Super Duty) >> Diagnosis And Testing >> Component Tests >> Brake Master Cylinder - Bypass Condition

Brake Master Cylinder - Bypass Condition

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the master cylinder. Refer to Brake System Inspection .
  2. Disconnect the brake tubes from the master cylinder.
  3. Plug the outlet ports of the master cylinder.
    4. NOTE: Make sure that the outlet port plugs do not show signs of leakage.
  4. Lightly apply the brakes and hold for 10 seconds. Release the brakes and then reapply with heavy force. If brake pedal height cannot be maintained, the brake master cylinder has an internal leak and a new brake master cylinder must be installed.
    • If brake pedal height is maintained, reinstall brake tubes and tighten to specifications. Refer to Specifications . After installation, bleed the brake system. Refer to Brake System Bleeding .
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