Brake Shoe Inspection

Special Tools 

CH 230  Disc Gauge

For equivalent regional tools, refer to Special Tools .

1. Measure the brake shoe lining thickness, using the CH 230  gauge (1).
   Fig 1: Measuring Brake Shoe Thickness

   Courtesy of GENERAL MOTORS COMPANY
   WARNING: Refer to Brake Dust Warning .
2. Compare the brake shoe lining thickness recorded to the brake drum component specification. Refer to Drum Brake Component Specifications .
3. If the brake shoe lining thickness is less than the specification or if a defect is found, replace the linings. Refer to Brake Shoe Replacement .
   NOTE: Replace the shoe and lining assembly in axle sets only.