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Problem:

Calipers binding causing premature outboard pad wear

Cause:

This problem can have two different causes. They are:

  1. Using petroleum based lubricants on this design caliper can cause the rubber in the keepers to swell. Swelling of the rubber will cause the caliper to bind on release.
  2. Buildup of rust and corrosion between the caliper/keeper/knuckle or failure to properly clean the mating surfaces of the caliper/keeper/ knuckle.

Solution:

The solutions to each of the causes listed above are:

  1. Ford states in TSB 98-5A-13 to use only a high quality silicone lubricant when servicing these trucks. Silicone will not effect the rubber and serves to repel the water.
  2. Whenever servicing the brake pads on this type of caliper make sure to clean all mating surfaces before applying the lubricant.

More Info:

Many Ford light trucks and SUVs use the sliding caliper pictured in Figure 15.1. When performing service on this type of caliper it is important to use the correct type of lubricant.

Figure 15.1 Ford Sliding Caliper

Ford service information states to use only a high quality silicone lube. Use of any petroleum based lubricant will cause the rubber core of the keep to swell. The swelling will restrict caliper movement and result in outboard pad wear. Moly-lube, anti-seize, white lithium grease and most other commonly used lubricants are petroleum based and should never be used on brake rubber parts. Use of the silicone lube will not only prevent damage to the rubber core of the keeper but silicone also repels water.

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