Nissan Pick-ups and Pathfinder 1989-1995

Wheel Cylinders

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REMOVAL & INSTALLATION



See Figures 1 through 7

We recommend replacement of the wheel cylinders in axle sets for added safety and reliability.

  1. Remove the hub cap and loosen the lug nuts.
  2.  
  3. Raise and safely support the truck until the rear wheels are off the ground.
  4.  
  5. Remove the lug nuts, tire and wheel.
  6.  
  7. Remove the brake drum and brake shoes.
  8.  
  9. Disconnect the brake hose from the wheel cylinder.
  10.  
  11. Unscrew the wheel cylinder securing nut and remove the wheel cylinder from the brake backing plate.
  12.  

To install:
  1. Install the wheel cylinder to the brake backing plate.
  2.  
  3. Connect the brake hose to the wheel cylinder.
  4.  
  5. Install the brake shoes and brake drum, as previously described. Properly adjust the brake shoe-to-drum clearance.
  6.  
  7. Install the tire/wheel assembly and hub cap.
  8.  
  9. Bleed the brake hydraulic system.
  10.  
  11. Lower the vehicle and road test.
  12.  

OVERHAUL



This is one of those jobs where it is usually easier just to replace the part rather than rebuild it. If you decide to rebuild the wheel cylinders, be sure you get the correct parts for your truck.

  1. Remove the wheel cylinder from the backing plate.
  2.  
  3. Remove the dust boot and take out the piston. Discard the piston cup. The dust boot can be reused, if necessary, but it is better to replace it.
  4.  
  5. Wash all of the components in clean brake fluid.
  6.  



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Fig. Fig. 1: Remove the wheel cylinder retaining bolts



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Fig. Fig. 2: Remove the wheel cylinder assembly from the brake backing plate

  1. Inspect the piston and piston bore. Replace any components which are severely corroded, scored, or worn. The piston and piston bore can be polished lightly with crocus cloth.
  2.  
  3. Wash the wheel cylinder and piston thoroughly in clean brake fluid, allowing them to remain lubricated for assembly.
  4.  
  5. Coat all of the new components to be installed in the wheel cylinder with clean brake fluid prior to assembly.
  6.  
  7. Assemble the wheel cylinder and install it to the backing plate.
  8.  



Click image to see an enlarged view

Fig. Fig. 3: After removing the wheel cylinder from the vehicle, remove the dust boot



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Fig. Fig. 4: Remove the piston assembly from the wheel cylinder



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Fig. Fig. 5: Remove the spring from the wheel cylinder piston assembly-if the spring is worn or damaged, replace it upon installation



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Fig. Fig. 6: Remove the seal from the piston assembly with a small pick



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Fig. Fig. 7: View of a disassembled wheel cylinder-note that new seals must be used upon installation

 
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