Most disc brake pads are equipped with wear indicators. If a squealing noise occurs from the brakes while driving, check the pad wear indicator plate. If there is evidence of the indicator plate contacting the rotor disc, the brake pad should be replaced.
REMOVAL AND INSTALLATION
- Remove half of the volume of brake fluid from the master cylinder.
- Raise and safely support the vehicle.
- Remove the wheel and tire assemblies.
- Remove the brake caliper without disconnecting the brake line. Support the caliper with a length of wire. Do not let the caliper hang from the brake hose.
- Remove the brake pads and shims. Inspect the brake rotor and machine or replace as necessary. Check the minimum thickness (specification is cast into the rotor) before machining.
- Use a suitable tool to push the caliper piston into it's bore. On FWD Impulse and truck rear calipers, push the piston in by rotating it clockwise until it stops, then set the piston, aligning the uneven section on the piston surface with the caliper center.
- Apply a thin coat of grease to the rear face of the brake pad and install the shim. Install the brake pads. On FWD Impulse rear calipers, the brake pad is provided with a pinion. The automatic adjuster becomes inoperative when the pinion is not placed correctly into the indentation of the piston.
- Install the calipers. Install the wheel and tire assemblies and lower the vehicle.
- Apply the brakes several times to seat the pads. Check the fluid in the master cylinder and add as necessary.