Brake Caliper Overhaul Front Delco
Removal Procedure
Tools Required
• | J 24548 Disc
Brake Piston Ring Compressor |
• | J 36474
75 mm
Boot Seal Installer or |
• | J 36475
80 mm
Boot Seal Installer or |
• | J 38453
86 mm
Boot Seal Installer |
- Remove the fluid from the caliper (1).
- Remove the brake pad. Clean the interior of the caliper with clean
shop towels.
Caution: Do not place your fingers in front of the piston in order
to catch or protect the piston while applying compressed air. This could result
in serious injury.
Notice: Use just enough air pressure to ease the piston out of
the bore. You can damage a blown-out piston even with the padding.
- Remove the piston.
• | Direct compressed air into the caliper fluid inlet. |
• | Use just enough air pressure to ease the piston out of the bore. |
- Remove the boot using
care not to scratch the housing bore.
- Remove the piston seal with a nonmetal type of tool.
- Remove the bleeder valve.
- Use denatured alcohol in order to clean the following parts:
• | Use dry, filtered, compressed air to dry the parts and to blow
out the passages. |
- Replace any piston with the following conditions:
- Replace any caliper bore or seal groove with the following conditions:
• | Attempt to remove any light corrosion on the caliper bore or seal
groove using a crocus cloth. |
Installation Procedure
- Use clean brake fluid in order to lubricate the following parts:
- Install the piston seal using care not to twist the seal.
- Install the boot on the piston.
- Install the piston and
the boot into the caliper bore.
- Push the piston to the bottom of the bore.
- Seat the boot housing
usingJ 36474
orJ 36475
or J 38453
.
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the
bleeder valve.
Tighten
Tighten the bleeder valve to 13 N·m (115 lb in).
Brake Caliper Overhaul Front/Rear Bendix
Removal Procedure
Tools Required
J 24548
Piston
Seal Installer
- Remove the fluid from the caliper.
Caution: Do not place your fingers in front of the piston in an attempt to catch
or protect it when applying compressed air. This could result in serious injury.
Notice: Use only enough air to ease the piston out of the bore. If the piston
is blown out, even with the padding, it can be damaged.
- Remove the brake pad. Clean the interior of the caliper with clean shop
towels.
- Remove the piston.
- Direct the compressed
air into the caliper fluid inlet.
- Remove the boot.
- Remove the piston seal with a nonmetal tool.
- Remove the bleeder valve.
- Clean the bleeder valve, the caliper bore, the caliper passages,
and the piston with denatured alcohol. Use dry, filtered, compressed air to
dry the parts and to blow out the passages.
- Replace any piston which is scored, corroded, or contains damage
to the chrome plating.
- Replace any caliper bore which is scored, pitted, or corroded.
Attempt to polish off any light corrosion with a crocus cloth.
Installation Procedure
- Lubricate the new piston seal, the caliper bore, the piston and
the seal lips on the boot with clean brake fluid.
- Install the piston seal being careful not to twist the seal in the caliper
bore.
- Install the boot on J 24548
.
3.1. | Place the large diameter of the boot over the tool, then carefully
work the smaller diameter onto the tool. |
3.2. | Slide the large diameter of the boot off the tool. |
- Install the boot in the caliper bore groove. The lip of the boot
must firmly sit in the groove.
- Install the piston inside J 24548
.
- Install the piston halfway into the bore.
- Remove J 24548
. Make sure that the boot is sitting firmly in the groove.
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the
bleeder valve.
Tighten
Tighten the bleeder valve to 13 N·m (110 lb in).