Brake Drum:
A brake drum is a component of a drum brake system in a vehicle. It is a cylindrical-shaped drum that is attached to the wheel hub and rotates along with the wheel. Inside the brake drum, there are brake shoes that press against the inner surface of the drum to create friction and slow down or stop the vehicle when the brake pedal is pressed.
Technical Explanation:
Common Symptoms:
- Squealing or grinding noise when braking
- Vibration or pulsation in the brake pedal
- Reduced braking performance
- Vehicle pulling to one side when braking
Diagnosing:
- Visual inspection: Check for any visible signs of wear or damage on the brake drum.
- Measure drum thickness: Using a brake drum gauge, measure the thickness of the drum to determine if it is within specifications.
- Check for heat spots: Look for discolored areas on the drum surface, which could indicate overheating and potential damage.
Common Repairs:
- Resurfacing: If the brake drum is within specifications but has minor wear, it can be resurfaced to restore a smooth braking surface.
- Replacement: If the brake drum is worn beyond the specified limit or damaged, it will need to be replaced with a new one.
- Brake shoe replacement: When replacing the brake drum, it is also recommended to replace the brake shoes to ensure proper braking performance.