Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Rear Drum Brake Inspection
- Avoid breathing dust particles.
- Never use an air hose or brush to clean brake assemblies. Use an OSHA-approved vacuum cleaner.
- Raise the vehicle on a lift (see LIFT AND SUPPORT POINTS ).
- Remove the rear wheels.
- Release the parking brake, and remove the brake drum (see REAR BRAKE DRUM REPLACEMENTΒ ).
- Check the wheel cylinder (A) for leakage.
- Check the brake linings (B) for cracking, glazing, wear, and contamination.NOTE: Contaminated brake linings or drums reduce stopping ability.
- Measure the brake lining thickness (C). Measurement does not include brake shoe thickness.
Brake lining thickness:Β
Standard: 4.5 mm (0.18 in)Β
Service limit: 1.0 mm (0.04 in)Β
- If any part of the brake lining thickness is less than the service limit, replace the brake shoes as a set.
- Check the hub (D) for smooth operation. If it requires servicing, replace the hub bearing unit (see HUB BEARING UNIT REPLACEMENT ).
- Measure the inside diameter of the brake drum with inside vernier calipers.
Drum inside diameter:Β
Standard: 200 mm (7.874 in)Β
Service limit: 201 mm (7.91 in)Β
- If the inside diameter of the brake drum is more than the service limit, replace the brake drum.
- Install the brake drum (see REAR BRAKE DRUM REPLACEMENTΒ ).
- Check the brake drum for scoring, grooves, corrosion, and cracks.
- Clean the mating surfaces between the brake disc and the inside of the wheel, then install the rear wheels.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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