Lincoln AL3Z-1125-B Rotor Assembly

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The manufacturer recommends resurfacing the brake discs only in the event of pedal pulsations or hard (overheated) spots on the disc. If you choose not to have the discs resurfaced, you should deglaze them with sandpaper or emery cloth. However, ensure that the disc thickness doesn't go below the specified minimum thickness, which is cast into the disc. You can check the disc thickness with a micrometer.

During the visual inspection of the brake disc surface, look for score marks and other damage. It's normal to see light scratches and shallow grooves, which won't affect brake operation. However, deep grooves over 0.015-inch (0.38 mm) deep require disc removal and refinishing by an automotive machine shop.

If necessary, have the disc refinished, but make sure not to machine it below the specified minimum thickness.