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DRUM BRAKE SYSTEM DIAGNOSIS Test Description The number below refers to the step number on the diagnostic table: 18: Drum brake backing plates that come in contact with brake drums may cause brake Step Action Yes No DEFINITION: This diagnostic table is designed to diagnose ONLY the components of the 1 Were you sent here from a Brake Symptom Go to Step 2 Go to 2 1. Remove the brake drums. Refer to Brake Drum Replacement . 2. Inspect the drum brake shoes for the following conditions: Lining thickness below specifications Uneven and/or abnormal wear - edge- Contamination from an external Looseness, damage, glazing, or Did you find any conditions to indicate a Go to Step 3 Go to Step 7 3 Are any of the brake shoes contaminated? Go to Step 4 Go to Step 5 4 1. Inspect the wheel cylinders for evidence of an external brake fluid leak. 2. Replace any wheel cylinder that is found to be leaking brake fluid. Refer to Wheel Did you complete the inspection and -
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
replacement? Go to Step 6 5 1. Inspect the drum brake hardware for any components which are worn, damaged, 2. Replace components as required. Refer to Brake Shoe Replacement . 3. Replace the drum brake shoes. Refer to Brake Shoe Replacement . Did you complete the inspection and Go to Step 8 - 6 1. Clean the remaining drum brake system components to remove any traces of the 2. Inspect the drum brake hardware for any components which are worn, damaged, 3. Replace the drum brake hardware components as required. Refer to Brake 4. Replace the contaminated brake shoes. Refer to Brake Shoe Replacement . Did you complete the cleaning, inspection and Go to Step 8 - 7 1. Inspect the drum brake hardware for any components which are worn, damaged, 2. Replace components as required. Refer to Brake Shoe Replacement . -
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Did you complete the inspection and, if Go to Step 8 8 1. Check the diameter of each of the brake drums. 2. Make a determination for each brake drum if the drum can be REFINISHED and Refer to Brake Drum Diameter IMPORTANT: Make the following determination AND Go to Step 9 Go to Step 11 9 1. Inspect each of the brake drums for the following surface and wear conditions: Refer to Brake Drum Surface and Wear Braking Surface Conditions Heavy rust and/or pitting Cracks and/or heat spots Excessive blueing discoloration Missing balance weights Braking Surface Wear Conditions Deep or excessive scoring Radial runout beyond maximum IMPORTANT: Make the following determination AND
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
2. Make a determination for each brake drum if the drum requires refinishing based upon If the brake drum exhibits any of the Drum exhibits one or more of the Drum is beyond the acceptable level Does the brake drum require REFINISHING? ANSWER the question INDIVIDUALLY for Go to Step 10 Go to Step 14 10 1. Refinish the brake drum. Refer to Brake Drum Refinishing . 2. Inspect the brake drum diameter. Refer to Brake Drum Diameter Measurement . Were you able to REFINISH the brake drum Go to Step 14 Go to Step 13 11 Is the brake drum at or below the DISCARD Go to Step 13 Go to Step 12 1. Inspect each of the brake drums for the following surface and wear conditions: Refer to Brake Drum Surface and Wear Braking Surface Conditions Heavy rust and/or pitting Cracks and/or heat spots Excessive blueing discoloration
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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