F 350 2WD Pickup V8-7.3L DSL (1988)
Brake Caliper: Service and Repair
Rebuild
DISASSEMBLY
Disc Brake Caliper Disassembled
1. Drain the fluid from the cylinders.
2. Secure the caliper assembly in a vise.
Removing Caliper Piston
3. Place a block of wood between the caliper bridge and the cylinders, and apply low pressure air to the brake hose inlet. The pistons will be forced
out to the wood block.
4. Remove the wood block, and remove the pistons.
5. Remove and discard the piston seals and boots.
6. If the caliper assembly is leaking, replace the piston assemblies. If the cylinder bores are scored, corroded or excessively worn, replace the caliper.
Do not hone the cylinder bores. Piston assemblies are not available for oversize bores.
CLEANING and INSPECTION
Clean all metal parts with isopropyl alcohol. Clean out and dry the grooves and passageways with compressed air. Make sure that caliper bore and
component parts are thoroughly clean.
Use a wire brush to remove any rust or corrosion from the machined surfaces of the caliper housing.
NOTE: Do not use a wire brush in the cylinder bore.
Check the cylinder bore and piston for damage or excessive wear. Replace the piston if it is pitted, scored or worn. Do not replace phenolic pistons for
cosmetic surface irregularities or small chips between the piston groove and pad face.
Use a wire brush to clean corrosion from the boot groove and the machined surfaces of the spindle assembly.
