Installation
Drum Brake Hardware:
SERVICING ADJUSTER
^ Separate brake adjuster screw socket from adjusting screw and unscrew adjusting screw from adjusting nut.
^ Clean and inspect threads of adjuster for nicks, burrs and freedom of movement service or replace as necessary. If brake shoe adjusting screw socket is frozen, it must be replaced.
^ Apply a light coat of Premium Long-Life Grease to threaded area of adjusting screw brake shoe adjusting screw.
^ Apply a coat of Premium Long-Life Grease to inside of brake shoe adjusting screw socket.
^ Assemble brake adjuster.
^ Turn brake shoe adjusting pivot nut all the way down on screw and then back off one turn.
INSTALLING SHOES
1. Apply a light coating of Silicone Brake Caliper Grease and Dielectric Compound to rear brake backing plate-brake shoe contact areas.
2. Apply a light coat of Premium Long-Life Grease XG-1-C or-K or equivalent to threaded areas of brake adjuster screw and brake shoe adjusting screw socket. Assemble brake adjuster with stainless steel washer. Turn brake shoe adjusting screw socket all the way down on screw, then back off one turn.
3. Install parking brake lever to trailing shoe with spring washer and new parking brake lever pin retainer. Crimp parking brake lever pin retainer to securely retain parking brake lever.
4. Position trailing shoe on rear brake backing plate. Install brake shoe hold-down spring pin and brake shoe hold-down spring. Attach rear parking brake cable.
5. Position leading shoe on rear brake backing plate. Install brake shoe hold-down spring pin and brake shoe hold-down spring. and attach lower brake shoe adjusting screw spring to brake shoes.
NOTE: Socket blades and adjusters are marked R and L. Install socket blades with letter in upright position to make sure of proper slot engagement to brake shoe adjusting lever.
Adjusting Lever Installation:
6. Install adjuster assembly to slots in rear brake shoes and linings. Socket end must fit into slot in leading shoe (wider slot). Slot in adjuster nut must fit into slots in trailing shoe and parking brake lever.
7. Install brake shoe adjusting lever on pin on leading shoe and to slot in brake shoe adjusting screw socket.
8. Install upper brake shoe adjusting screw spring in slot on trailing shoe and slot in adjuster lever. Brake shoe adjusting lever should contact star and adjuster assembly.
HUB INSTALLATION
1. Position wheel hub on rear wheel spindle.
2. Install new rear axle wheel hub retainer and tighten to 255-345 Nm (188-254 ft. lbs.).
3. Install new front hub cap grease seal.
DRUM INSTALLATION
NOTE: The rear brake drum are self-adjusting and require a manual adjustment only after the brake shoes and linings have been replaced or when the length of the brake adjuster screw has been changed while performing some other service operation. The manual adjustment is performed with the brake drum removed, using a brake adjustment gauge
PRE-CHECKS
- When adjusting the rear brake shoe and lining, check the front parking brake cable and conduit and rear parking brake cables for proper adjustment and freedom of movement.
- Make sure the equalizer operates freely.
- When adjusting the rear brake shoes and linings, check the parking brake lever for proper adjustment and freedom of movement.
- Refer To: Parking Brake for servicing. Parking Brake System
- Make sure that the adjuster mechanism operates freely with the brake shoes and linings centered on the rear brake backing plate.
MANUAL DRUM ADJUSTMENTS
1. Apply a small quantity of Silicone Brake Caliper Grease and Dielectric Compound to points where the shoes contact the rear brake backing plate. Do not get lubricant on linings.
2. Determine inside diameter of the drum braking surface using a brake adjustment gauge.
3. Adjust the brake shoes and lining's diameter to fit the gauge. Line the brake shoes and linings up vertically so the flats on the bottom of the brake shoes and linings are aligned approximately 1.5mm (0.05 inch) above the bottom of the brake shoe abutment plate before setting the gauge diameter.
4. Hold automatic brake shoe adjusting lever out of engagement while rotating adjusting screw. Lubricate if necessary. Make sure adjusting screw rotates freely. Refer to Brake Shoe/Service & Repairfor adjuster service. Installation
5. Rotate brake adjustment gauge around brake shoes and linings to make sure of proper setting.
6. Install brake drum.
7. Install tire and wheel assembly. Tighten lug nut to 115-142 Nm (85-104 ft. lbs.). Do not use power or impact-type tools; use a torque wrench.
8. Install the wheel cover and nut covers as required.
9. Complete adjustment by applying brake pedal several times with a minimum of 111 Nm (25 lbs) force.
10. After brake shoes and linings have been properly adjusted, check operation of brakes by making several stops from varying forward speeds.