What is a brake wheel cylinder replacement?

If the wheel cylinders are worn out, the mechanic will replace them with new ones. Wheel cylinders can wear down and leak brake fluid over time, which reduces the potency of the brakes.
Brake wheel cylinders press the brake shoes against the brake drums, which is what causes the friction necessary to slow or stop the vehicle. These are found in the rear brake system inside the brake drums. 

How to replace your brake wheel cylinder

When you need new brake wheel cylinders, the mechanic will usually do the following:
  • Examine the rear wheel cylinders for any fluid leakage
  • Inspect the rear brake shoes and other hardware
  • Replace the wheel cylinders if necessary 
  • Adjust the rear brakes
  • Lubricate the backing plates 
  • Assure the axle seals aren’t leaking into the brake drums
  • Bleed the whole brake system (remove any trapped air)
  • Do a full brake inspection and test drive

When do I need to get my brake wheel cylinders replaced? 

The brake wheel cylinders, as with your entire brake system, should probably be inspected once per year. That  said, there are a few symptoms that indicate you may need to replace the brake wheel cylinders:
  • Your brake pedal goes all the way to the floor of your car
  • You hear noise from the rear brakes
  • You notice fluid leaking under the car near your back tires
If your wheel cylinders stop working, your brake shoes won’t have enough force to stop the car as well as they should, so faulty wheel cylinders could be a safety issue. If you notice any abnormalities with your brakes, be sure to get them checked out as soon as possible. 

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