OEM Chrysler Cirrus Wheel Cylinder

Chrysler Cirrus Wheel Cylinder Parts and Q&A

• Wheel Cylinder
  4728859
  Q: How to Maintain and Fix a Wheel Cylinder on Chrysler Cirrus?

  A:

  Before servicing the wheel cylinder, start by cleaning the metal part of the brake shoes and checking if they are straight or not. If the lining doesn't come in contact across the entire width from heel to toe, you should replace the shoes. Check the assembled thickness of both the leading and trailing shoe and lining, remembering their thickness requirements differ. At least 3.0 mm of total stuffing thickness is required for the lead brake shoe rim and lining, but for the follow-up brake shoe the minimum is only 2.8 mm. If grinding the shoes results in no contact at the toe or heel, it may suggest the wheel is set wrongly. Wash and check the brake support plate and auto self-adjuster to ensure there's free movement of the quadrant against all of its contact points and throughout the entire length of the mounting slot. Look for damaged or worn parts on the quadrant spring, confirm that the knurled pin is not broken and held firmly and check the whole adjuster mechanism to ensure it's still good and change it if it is damaged. Should your parking brake use this design, put Mopar Multi-Purpose Lubricant or something equivalent on the spot where the quadrant sits next to the adjuster's strut. If you notice the areas around the springs are discolored or bulged, it's a sign to change them. Once the Brake Drums are off, check the boots on the wheel cylinders for brake fluid leaks, cuts, tears or heat cracks; replace any parts that are damaged or look worn and reinstall them. If a wheel cylinder is leaking and the brake lining material is wet with brake fluid, replace the brake shoes.