REMOVAL & INSTALLATION
See Figures 1 through 14
When replacing brake pads on a vehicle, always replace both sides at the same time. In other words, if the brake pads are worn only on the drivers side of the vehicle, do not just replace the drivers side pads, replace the passengers side also.
- Loosen the wheel lug nuts.
- Raise and safely support the vehicle securely on jackstands.
- Remove the wheel.
- On front brake pads, temporarily retain the brake disc with a couple of lug nuts.
- On rear brake pads, remove the brake hose mounting bracket attached to the strut.
- Siphon a sufficient quantity of brake fluid from the master cylinder reservoir to prevent any brake fluid from overflowing the master cylinder when removing or installing new pads. This is necessary as the piston must be forced into the caliper bore to provide sufficient clearance when installing the pads.
- Hold the caliper sliding pin on the bottom and loosen the installation bolt.
- Grasp the caliper from behind and carefully pull it to seat the piston in its bore.
- On some models it will be necessary to remove the 2 caliper mounting pins (bolts), then remove the caliper assembly. Suspend the caliper with a wire. On other calipers, remove just the lower bolt and lift the caliper up and suspend it from a wire. Do not disconnect the brake line.
- Slide out the old brake pads along with any anti-squeal shims, springs, pad wear indicators and pad support plates. Make sure to note the position of all assorted pad hardware.
- Check the brake disc (rotor) for thickness and run-out. Inspect the caliper and piston assembly for breaks, cracks, fluid seepage or other damage. Overhaul or replace as necessary.
- Install the pad support plates into the torque plate.
- Install the pad wear indicators onto the pads. Be sure the arrow on the indicator plate is pointing in the direction of rotation.
- Apply brake grease to both sides of the inner anti squeal shim. Install the anti-squeal shims on the outside of each pad and then install the pad assemblies into the torque plate.
There should be no grease or oil adhering to the friction surfaces of the pads or disc.
- Position the caliper back down over the pads. If it won't fit, use a C-clamp or hammer handle and carefully force the piston into its bore.
- Install the caliper over the brake disc.
- Hold the sliding pin and tighten the installation bolt on the front to 25 ft. lbs. (34 Nm) and rear to 14 ft. lbs. (20 Nm.).
- Attach the rear brake hose bracket and tighten the bolt to 22 ft. lbs. (30 Nm).
- Install the wheels and lower the vehicle. Check the brake fluid level. Before moving the vehicle, make sure to pump the brake pedal to seat the pads against the rotors.
See Figure 15
If you hear a squealing noise coming from the brakes while driving, check the brake lining thickness and pad wear indicator by looking into the inspection hole on the brake cylinder with the wheels removed and the vehicle properly supported. The wear indicator is designed to emit the squealing noise when the brake pad wears down to 2.5mm at which time the pad wear plate and the rotor disc rub against each other. If there are traces of the pad wear indicator contacting the rotor disc, the brake pads should be replaced.
To inspect the brake lining thickness, look through the inspection hole and measure the lining thickness using a machinists rule. Also looks for signs of uneven wear. Standard thickness is 10mm. The minimum allowable thickness is 0.039 inch. (1mm) at which time the brake pads must be replaced.
Always replace the pads on both wheels. When inspecting or replacing the brake pads, check the surface of the disc rotors for scoring, wear and runout. The rotors should be resurfaced if badly scored or replaced if badly worn.