Ranger 4WD L4-140 2.3L SOHC (1984)
Brake Caliper: Service and Repair
Rebuild
Caliper Assembly
NOTE: Do not use a screwdriver or any similar tool to pry piston into or out of the bore to prevent chipping or scuffing damage to the phenolic piston.
DISASSEMBLY
1. Remove the caliper assembly. Place a block of wood over the piston before applying air pressure to prevent damage to the piston.
Removing Piston
WARNING: Do not place fingers in front of piston in an attempt to catch or protect it when applying compressed air. This could result
in serious injury.
2. Apply air pressure to the fluid port in the caliper with a rubber-tipped nozzle to remove the piston. If the piston is seized and cannot be forced
from the caliper, tap lightly around the piston while applying air pressure.
3. Remove the dust boot from the caliper assembly.
4. Remove the rubber piston seal from the cylinder and discard it.
CLEANING AND INSPECTION
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Clean all metal parts with isopropyl alcohol or brake parts cleaner. Then, clean out and dry the grooves and passageways with compressed air.
Make sure caliper bore and component parts are thoroughly clean.
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Check the cylinder bore and piston for damage or excessive wear. Replace the piston if it shows signs of pitting, scoring or cracks.
ASSEMBLY
1. Apply a film of clean brake fluid to the new caliper piston seal, and install it in the cylinder bore. Be sure the seal does not become twisted but is
firmly seated in the groove.