Ford Vans 1961-1988 Repair Guides

Brake Disc (Rotor)



  1. Jack up the front of the truck and support it with jackstands. Remove the front wheel and tire assembly.
  3. Remove the caliper assembly and support it to the frame with a piece of wire without disconnecting the brake fluid hose.
  5. Remove the hub and rotor assembly as described in .
  7. Install the rotor in the reverse order of removal, and adjust the wheel bearing as outlined in .


Click image to see an enlarged view

Fig. Fig. 1 Use a dial indicator to measure rotor lateral run-out

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Fig. Fig. 2 Measure the rotor thickness with a micrometer

If the rotor is deeply scarred or has shallow cracks, it may be refinished on a disc brake rotor lathe. Also, if the lateral run-out exceeds 0.010 in. (0.25mm) within a 6 in. (15cm) radius when measured with a dial indicator, with the stylus 1 in. (2.5cm) in from the edge of the rotor, the rotor should be refinished or replaced.

A maximum of 0.020 in. (0.51mm) of material may be removed equally from each friction surface of the rotor. If the damage cannot be corrected when the rotor has been machined to the minimum thickness shown on the rotor, it should be replaced.

The finished braking surfaces of the rotor must be parallel within 0.007 in. and lateral run-out must not be more than 0.003 in. (0.076mm) on the inboard surface in a 5 in. (12.7cm) radius.