Removal and Installation
WARNING: Although factory installed brake lining used on the viper is made from asbestos free materials, some after market brake lining may contain asbestos. This should be taken into account when servicing a vehicle's brake system, when aftermarket brake linings may have been installed on the vehicle. Always wear a respirator when cleaning brake components as asbestos can cause serious bodily harm such as asbestosis and or cancer. never clean brake components by using compressed air, use only a vacuum cleaner specifically designed for the removal of brake dust. If a vacuum cleaner is not available, clean brake parts using only water dampened shop towels. do not create brake lining dust by sanding brake linings when servicing a vehicle. Dispose of all dust and dirt suspected of containing asbestos fibers using only sealed airtight bags or containers. Follow all recommended safety practices prescribed by the Occupational Safety And Health Administration (OSHA) and the Environmental Protection Agency (EPA), for handling and disposal of products containing asbestos.GENERAL INFORMATION
Grease or other foreign material must be kept off the brake shoes and rotor.
Handling of the brake shoes should be done in such a way as to avoid nicking the brake shoe friction material.
If inspection reveals that the caliper piston seal or dust boot is worn or damaged, it should be replaced immediately. A damaged piston seal will be evident by dampness in the piston and dust boot area of the caliper assembly.
REMOVE
1. Raise vehicle on jackstands or centered on a hoist.
2. Remove front wheel and tire assemblies.
3. Using a hammer and drift, remove the lower brake shoe assembly to caliper assembly support pin. Pin is to be removed from the outboard side of brake caliper assembly.
Spring Clip:
4. Remove the brake shoe assembly spring clip, out from under the upper support pin, before removing upper pin from caliper.
5. Using a hammer and drift, remove the upper brake shoe assembly to caliper assembly support pin. Pin is to be removed from the outboard side of brake caliper assembly.
6. Remove the inboard and outboard brake shoes, from the disc brake caliper.
Disc Brake Caliper Inspection:
7. After brake shoe assemblies are removed from caliper, inspect caliper pistons and dust boot areas on caliper halves for evidence of brake fluid leakage. Also inspect dust boots on all caliper pistons for any cuts, tears or heat cracks and brake shoe guides for excess wear or damage.
8. If any of these conditions exist the caliper assembly should be removed from the vehicle, disassembled, cleaned, inspected and have new piston seals and dust boots installed on all pistons.
9. If no brake fluid leak is evident and caliper piston dust boots shove no signs of damage, new brake shoe assemblies can be installed in the caliper.
INSTALL
NOTE: When new brake shoes are installed they must be burnished (seated) to the rotor. This must be done to ensure the proper performance of the replacement brake shoe. Follow the procedure at the end of this installation procedure to correctly burnish the new brake shoes.
Before new brake shoes can be installed in the caliper, the caliper pistons must be pushed back into the bores of the caliper.
Push the pistons back into the bores of the caliper using the following procedure. This procedure must be used to revert damaging the caliper, pistons, dust boots or braking disc.
CAUTION: When pushing the pistons back into the bores of the caliper, use only a trim stick as shown image or other suitable soft tool. Never use a screw driver or other metal pry bar due to potential damage to the braining surface of the rotor surface.
1. Install the previously; removed brake shoes back into the caliper. Place a trim stick at the center groove of the inboard brake shoe and the outer edge of the rotor. Using the trim stick, apply pressure against the inboard brake shoe assembly until both pistons are completely bottomed in the bores of the inboard caliper half. Move the trim stick between the outboard brake shoe and the rotor and repeat above the procedure.
2. Install the new inboard and outboard brake shoes into the disc brake caliper.
3. Install the upper brake shoe support pin into the caliper and both brake shoe upper support pin holes. Ensure that the small end of the support pin is in the hole in the outboard caliper half.
4. Install the brake shoe spring clip under the upper brake shoe assembly support pin.
5. Press down on the lower end of the spring clip until it touches the braking disc. Then install the lower brake shoe assembly support pin into the caliper assembly and both brake shoe assembly lower support pin holes. Be sure the spring clip is against lower support pin and the small end of the support pin is in hole in outboard caliper half.
6. Using a pin punch and a hammer, drive the upper and lower support pins for the brake shoes into the caliper from the inboard side. Support pins must be installed into the caliper until the support pin retaining rings are locked into caliper assembly.
Correctly Installed Brake Shoes:
7. After the support pins are fully installed into the caliper assembly. Inspect assembled caliper to be sure the spring clip is centered in the opening of the caliper and is resting against both brake shoe assemblies.
8. Install the wheel and tire assembly. Tighten the wheel mounting stud nuts in proper sequence until all nuts are torqued to half specification. Then repeat the tightening sequence to the full specified torque of 122 Nm (90 ft. lbs.).
9. Remove jackstands or lower hoist. Before moving vehicle, pump the brake pedal several times to insure the vehicle has a firm brake pedal to adequately stop vehicles.
10. Road test the vehicle and make several stops to wear off any foreign material on the brakes, and to seat the brake shoe linings. Refer to Burnishing for the correct procedure if new shoes were installed.