Drum Brake System: Adjustments

^ Tools Required
- J 21177-A Drum to Brake Shoe Clearance Gauge

1. Raise and suitably support the vehicle.

Caution: To help avoid personal injury, when a vehicle is on a hoist, provide additional support for the opposite end from which you are removing components. The additional support will reduce the possibility of the vehicle falling off the hoist. When you are removing major components from the vehicle while the vehicle is on a hoist, chain the vehicle frame to the hoist pads at the same end from which you are removing the major components to prevent tip-off. If you fail to follow these precautionary measures, vehicle damage, serious personal injury, or death may result.

2. Mark the relationship of the wheel to the wheel studs in the bearing flange.
3. Remove the rear wheels and tires.
4. Mark the relationship of the drum to the wheel studs in the bearing flange.
5. Remove the brake chum. Refer to Brake Drum Replacement.
6. Ensure the [lever stops on both park brake levers are against the edges of the shoe webs on the park brake shoes. If the park brake cable is holding the stops off of the edge of the shoe web, loosen the park brake cable adjustment.
7. Measure the inside diameter (ID) of the drum using the J.21177-A.
8. Turning the star wheel on the adjusting screw assembly, adjust the shoe and lining diameter to 1.27 mm (0.050 inch) less than the drum ID.
9. Install the drum and wheel, aligning the marks that were made during the removal.
10. Repeat steps 2 through 9 in order to adjust the other rear brake position.
11. Torque the wheel nuts.
^ Tighten the wheel nuts to 140 Nm (100 inch lbs.).

NOTICE: Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact part number for that application. The manufacturer will call out those fasteners that require a replacement after removal. The manufacturer will also call out the fasteners that require thread lockers or thread sealant. UNLESS OTHERWISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion inhibitors) on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and joint clamping force, and may damage the fastener. When you install fasteners, use the correct tightening sequence and specifications. Following these instructions can help you avoid damage to parts and systems.

12. Lower the vehicle.
13. Apply and release the service brake pedal 30 to 35 times with normal pedal force. Pause about one second between pedal applications.