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Disc Caliper: Inspection

  1. Boot, seal, rubber bushings, and sleeves are to be replaced each time caliper is overhauled. Clean all other parts in denatured alcohol. Dry parts with dry compressed air.
    NOTE: Using lubricated shop air will leave a film of mineral oil on metal parts. This may damage rubber parts upon contact during reassembly.
  2. Check guide pins for corrosion, breaks in plating or other damage. Do not attempt to clean pins; replace them. Check outside diameter of piston for scoring, nicks, corrosion, and worn or damaged plating. If surface defects exist, piston must be replaced.
  3. Piston bore should be checked for similar defects. Bore is not plated, therefore, it may be polished with crocus cloth. Thoroughly clean after polishing. Replace caliper housing if bore corrosion cannot easily be cleaned out.
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