Express, Savana, G1500, G2500, G3500, 1998-2005

Brake Drums

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Removal & Installation



Full Floating Axles

CAUTION
Dust and dirt accumulating on brake parts during normal use may contain asbestos fibers from production or aftermarket brake linings. Breathing excessive concentrations of asbestos fibers can cause serious bodily harm. Exercise care when servicing brake parts. Do not sand or grind brake lining unless equipment used is designed to contain the dust residue. Do not clean brake parts with compressed air or by dry brushing. Cleaning should be done by dampening the brake components with a fine mist of water, then wiping the brake components clean with a dampened cloth. Dispose of cloth and all residue containing asbestos fibers in an impermeable container with the appropriate label. Follow practices prescribed by the Occupational Safety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) for the handling, processing, and disposing of dust or debris that may contain asbestos fibers.

To remove the drums from full floating rear axles, the axle shaft will have to be removed. Full-floating rear axles can be identified by a bearing housing that protrudes through the center of the wheel.

  1. Remove or disconnect the following:

    Wheel
     
    Axle shaft
     
    Retaining ring, key and adjusting nut
     
    Hub and drum
     

  2.  

To install:

  1. Install or connect the following:

    Hub and drum to the tube
     
    Adjusting nut
     
    Key and retaining ring
     
    Axle shaft and wheel
     

  2.  

To remove the drums from full floating rear axles, the axle shaft will have to be removed. Full-floating rear axles can be identified by a bearing housing that protrudes through the center of the wheel.

  1. Raise and support the vehicle safely.
  2.  
  3. Remove the wheel.
  4.  
  5. Remove the axle shaft.
  6.  
  7. Remove the retaining ring, key and adjusting nut.
  8.  
  9. Remove the hub and drum.
  10.  

To install:

  1. Install the hub and drum to the tube.
  2.  
  3. Install the adjusting nut and torque to specification.
  4.  
  5. Install the key and retaining ring.
  6.  
  7. Install the axle shaft and wheel.
  8.  

To remove the drums from full floating rear axles, the axle shaft will have to be removed. Full-floating rear axles can be identified by a bearing housing that protrudes through the center of the wheel.

  1. Remove or disconnect the following:

    Wheel
     
    Axle shaft
     
    Retaining ring, key and adjusting nut
     
    Hub and drum
     

  2.  

To install:

  1. Install or connect the following:

    Hub and drum to the tube
     
    Adjusting nut
     
    Key and retaining ring
     
    Axle shaft and wheel
     

  2.  

Semi-Floating Axles

CAUTION
Dust and dirt accumulating on brake parts during normal use may contain asbestos fibers from production or aftermarket brake linings. Breathing excessive concentrations of asbestos fibers can cause serious bodily harm. Exercise care when servicing brake parts. Do not sand or grind brake lining unless equipment used is designed to contain the dust residue. Do not clean brake parts with compressed air or by dry brushing. Cleaning should be done by dampening the brake components with a fine mist of water, then wiping the brake components clean with a dampened cloth. Dispose of cloth and all residue containing asbestos fibers in an impermeable container with the appropriate label. Follow practices prescribed by the Occupational Safety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) for the handling, processing, and disposing of dust or debris that may contain asbestos fibers.

  1. Raise and support the vehicle safely.
  2.  
  3. Mark the relationship of the wheel to the hub and remove the wheel.
  4.  
  5. Mark the relationship of the drum to the hub and pull the drum from the brake assembly. If the brake drums have been scored from worn linings, the brake adjuster must be backed off so the brake shoes will retract from the drum. The adjuster can be backed off by inserting a brake adjusting tool through the access hole provided. In some cases the access hole is provided in the brake drum. A metal cover plate is over the hole. This may be removed by using a hammer and chisel.
  6.  

To install:

  1. Align the mark on the drum to mark on hub and install drum
  2.  
  3. Align the mark on the wheel to mark on drum and install wheel
  4.  
  5. Adjust brake lining as needed. Pump brakes
  6.  

  1. Raise and support the vehicle safely.
  2.  
  3. Mark the relationship of the wheel to the hub and remove the wheel.
  4.  
  5. Mark the relationship of the drum to the hub and pull the drum from the brake assembly. If the brake drums have been scored from worn linings, the brake adjuster must be backed off so the brake shoes will retract from the drum. The adjuster can be backed off by inserting a brake adjusting tool through the access hole provided. In some cases the access hole is provided in the brake drum. A metal cover plate is over the hole. This may be removed by using a hammer and chisel.
  6.  

To install:

  1. Align the mark on the drum to mark on hub and install drum
  2.  
  3. Align the mark on the wheel to mark on drum and install wheel
  4.  
  5. Adjust brake lining as needed. Pump brakes
  6.  

  1. Raise and support the vehicle safely.
  2.  
  3. Mark the relationship of the wheel to the hub and remove the wheel.
  4.  
  5. Mark the relationship of the drum to the hub and pull the drum from the brake assembly. If the brake drums have been scored from worn linings, the brake adjuster must be backed off so the brake shoes will retract from the drum. The adjuster can be backed off by inserting a brake adjusting tool through the access hole provided. In some cases the access hole is provided in the brake drum. A metal cover plate is over the hole. This may be removed by using a hammer and chisel.

    Click image to see an enlarged view

    Fig. Exploded view of the brake drum

  6.  

To install:

  1. Align the mark on the drum to mark on hub and install drum
  2.  
  3. Align the mark on the wheel to mark on drum and install wheel
  4.  
  5. Adjust brake lining as needed. Pump brakes
  6.  

 
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