How to Remove a 1984 GMC Dually Truck Drum

The rear drums on a 1984 GMC dually are a part of the parking brake system, and also provide additional braking power to the front brakes. These drum brakes wear down over time, but they can be relined. If the you need to service the rear brakes in any way, you first need to remove the drums from the truck. This should take about 15 minutes to do.

Things You'll Need

• Jack
• Heavy-duty jack stands
• Tire iron
• Flathead screwdriver

Instructions

1. Lift the rear of the dually by the axle using the jack. Put the heavy-duty jack stands underneath the axle and adjust them high enough to keep the rear wheels off of the ground.

2. Unbolt the outer rear rim using the tire iron. Slide the outer rim off of the axle with both hands. Then remove the inner rear wheels from the axle.

3. Grip the drum with both hands and pull it off of the axle. If the drum won't move, look behind the drum and locate the adjusting screw which is on the top side of the axle. Turn the adjusting screw counterclockwise several turns using the flathead screwdriver. Pull the drum off of the axle.

References

• "Chilton General Motors Full-Size Trucks 1980-87 Repair Manual"; Michael M. Carroll; 1994