Wagoneer L4-150 2.5L VIN E TBI (1990)
CAUTION: Do not blow the piston out of the bore with sustained air pressure. This could result in a cracked piston. Use only enough air
pressure to ease the piston out. In addition, never attempt to catch the piston as it leaves the bore. This could result in personal injury.
Removing Dust Boot
4. Remove caliper piston dust boot. Collapse boot with suitable tool and remove and discard boot.
Remove Piston Seal
5. Remove and discard caliper piston seal with pencil, toothpick, or plastic tool. Do not use metal tools as they will scratch piston bore.
Slide Bushing And Boot
6. Remove caliper slide bushings and and boots.
CLEANING AND INSPECTION
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Clean the caliper and piston with clean brake fluid or Mopar brake cleaning solvent only. Do not use gasoline, kerosene, thinner, or any similar
type of solvent. These products may leave a residue that could damage the piston and seal.
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Wipe the caliper and piston dry with lint free towels or use low pressure compressed air.
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Inspect the piston and piston bore. Replace the caliper if the bore is corroded; rusted, or scored. Do not hone the caliper piston bore. Replace the
caliper if the bore is damaged.
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Inspect the caliper piston. The piston is made from a phenolic resin (plastic material) and should be smooth and clean. Replace the piston if
cracked or scored. Do not attempt to restore a scored piston surface by sanding or polishing. The piston must be replaced if damaged.
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Inspect the caliper bushings and boots. Replace the boots if cut or torn. Clean and relubricate the bushings with GF 661 or Dow 111 silicone
grease if necessary.
