Dodge Omni/Horizon/Rampage 1978-1989 Repair Guide

Wheel Cylinders

Print

REMOVAL & INSTALLATION





Click image to see an enlarged view

Fig. Fig. 1 Using a flare wrench, loosen the brake line fitting at the rear of the wheel cylinder



Click image to see an enlarged view

Fig. Fig. 2 Once the line is loosened, unthread it to free it from the cylinder



Click image to see an enlarged view

Fig. Fig. 3 Loosen and remove the wheel cylinder retaining bolt(s)

  1. Raise and support the car.
  2.  
  3. Remove the brake drums.
  4.  
  5. Visually inspect the wheel cylinder boots for signs of excessive leakage. A slight amount of leakage is normal, but excessive leakage will necessitate boot replacement. Replace any boots that are torn or broken.
  6.  
  7. In case of a leak, also remove the brake shoes and check for contamination.
  8.  
  9. Disconnect and plug the brake line.
  10.  
  11. Unbolt and remove the wheel cylinder.
  12.  

To install:

  1. Reposition the wheel cylinder and bolt into place.
  2.  
  3. Reconnect the brake line.
  4.  
  5. Install the brake shoes and brake drum.
  6.  
  7. Bleed the brakes.
  8.  

OVERHAUL



  1. Pry the boots away from the cylinder and remove the boots and piston as an assembly.
  2.  



Click image to see an enlarged view

Fig. Fig. 4 Pry the boots away from the cylinder



Click image to see an enlarged view

Fig. Fig. 5 Remove the piston and boot as an assembly

  1. Disengage the boot from the piston.
  2.  



Click image to see an enlarged view

Fig. Fig. 6 Disengage the boot from the piston

  1. Slide the piston into the cylinder bore and press inward to remove the other boot and piston. Also remove the spring with the cup expanders.
  2.  



Click image to see an enlarged view

Fig. Fig. 7 Slide the piston into the cylinder bore and press inward to remove the other boot and piston

  1. Wash all the parts (except rubber parts) in clean brake fluid and dry thoroughly. Do not use a rag; lint will adhere to the bore.
  2.  



Click image to see an enlarged view

Fig. Fig. 8 Wash all the parts (except rubber parts) in clean brake fluid and dry thoroughly. Do not use a rag; as lint will adhere to the bore

  1. Inspect the cylinder bores. Light scoring can usually be cleaned up with crocus cloth. Black stains are caused by the piston cups and are no cause of concern. Bad scoring or pitting means that the wheel cylinder should be replaced.
  2.  
  3. Dip the pistons and new cups in clean brake fluid prior to assembly.
  4.  
  5. Coat the wheel cylinder bore with clean brake fluid.
  6.  
  7. Install the expansion spring with the cup expanders.
  8.  
  9. Install the cups in each end of the cylinder with the open ends facing each other.
  10.  
  11. Assemble new boots on the piston and slide them into the cylinder bore.
  12.  
  13. Press the boot over the wheel cylinder until seated.
  14.  
  15. Install the wheel cylinder.
  16.  

 
label.common.footer.alt.autozoneLogo