Installation

If the original brake shoe assembly friction material is worn to a thickness requiring replacement, new brake shoe assemblies should be installed. See procedure listed below to correctly reseat piston in caliper bore.





CAUTION: The rear caliper piston must be seated (bottomed) to compensate for new brake lining. However, because the parking brake self adjuster mechanism is attached to the piston, a different seating method is required. The only acceptable method, is by rotating the piston back into the bore with Spanner, Special Tool 6366 or equivalent as described below. Any other seating method will damage the self-adjuster mechanism.

1. Reseat (bottom) the caliper piston in the bore as follows:
2. Assemble a 3/8 drive ratchet handle and 7/16 deep-well socket.

Reseating (Bottoming) Caliper Piston:

3. Insert Spanner, Special Tool 6366 or equivalent into the deep well socket.
4. Insert lugs on Spanner, Special Tool 6366 or equivalent into matching holes in face of caliper piston.

NOTE: A lot of force is required to be exerted against the piston while using the spanner tool to start the process of piston retraction.

5. Rotate the piston in a clockwise direction until fully seated (bottomed) in the bore. Then remove the piston rotating tools.

Rotor Removal/Installation:

6. Align marked rotor hole with marked wheel mounting stud in hub and bearing assembly. Then install rotor on hub and bearing assembly.





7. The rear disc brake shoes used on the Viper are interchangeable to the inboard or outboard side of the rotor. If new brake shoe assemblies are installed, either shoe assembly can be used on the inboard or outboard position on the caliper. If the original brake shoe assemblies are being installed they should be replaced in the original position.





8. Install the inboard brake shoe into the caliper.

Remove/Install Outboard Brake Shoe:

9. Install the outboard brake shoe assembly into the caliper.

WARNING: Hold anti-rattle spring in place while installing brake shoe retaining pin into caliper. If anti-rattle spring is not held in place during installation of retaining pin, anti-rattle spring may fly off caliper causing possible injury.





10. Install anti-rattle clip into caliper. Be sure anti-rattle clip is positioned correctly between brake shoe assemblies and caliper assembly. Install brake shoe assembly retaining pin into caliper assembly from outboard side, until small end of retaining pin is in inboard side of caliper assembly. When installing retaining pin be sure it passes through the loops in the anti-rattle spring.

Locking Brake Shoe Retaining Pin Into Caliper:

Rear Disc Brake Caliper Components:

11. Using a pin drift, drive brake shoe assembly retaining pin into caliper assembly. Be sure it is fully seated and retaining pin snap ring is seated in outboard side of caliper. Refer to image to ensure that the rear caliper brake shoes and components are correctly installed.
12. Install the wheel and tire assemblies. 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.).
13. 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 vehicle.
14. Apply the brakes several times to seat the brake shoes and equalize parking brake adjustment.
15. Road test the vehicle and make several stops to wear off any foreign material on the brakes and to seat the brake shoe linings. See Brake Burnish Procedure for the procedure if NEW brake shoes were installed.