Nissan Pick-ups and Pathfinder 1970-1988

Wheel Cylinders

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REMOVAL & INSTALLATION



See Figures 1, 2, 3, 4, 5 and 6

  1. Raise the rear of the truck and support it with safety stands.
  2.  
  3. Remove the wheel, brake drum, hub assembly, and brake shoes.
  4.  
  5. Disconnect the brake hose from the wheel cylinder.
  6.  
  7. Unscrew the wheel cylinder securing nut and remove the wheel cylinder from the brake backing plate.
  8.  
  9. Install the wheel cylinder, assemble the remaining components, and bleed the brake hydraulic system.
  10.  



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Fig. Fig. 1: Removing the brake line from the wheel cylinder



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Fig. Fig. 2: View of the brake line



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Fig. Fig. 3: Removing the wheel cylinder retaining bolts



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Fig. Fig. 4: Removing the wheel cylinder air bleeder valve



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Fig. Fig. 5: Removing the wheel cylinder from the backing plate



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Fig. Fig. 6: Removing the wheel cylinder to brake shoe links

OVERHAUL



See Figures 7, 8, 9 and 10

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. Datsun obtains parts from two manufacturers: Nabco and Tokiko. Parts are not interchangeable. The name of the manufacturer is on the part.



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Fig. Fig. 7: Removing the wheel cylinder dust cover



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Fig. Fig. 8: Removing the wheel cylinder piston



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Fig. Fig. 9: Installing the seal on wheel cylinder piston



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Fig. Fig. 10: Exploded view of the wheel cylinder assembly

  1. Remove the wheel cylinder from the backing plate.
  2.  
  3. Remove the snapring from the piston bore.
  4.  
  5. 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.
  6.  
  7. Wash all of the components in clean brake fluid.
  8.  
  9. 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. Move the crocus cloth around the piston bore; not in and out of the piston bore.
  10.  
  11. Wash the wheel cylinder and piston thoroughly in clean brake fluid, allowing them to remain lubricated for assembly.
  12.  
  13. Coat all of the new components to be installed in the wheel cylinder with clean brake fluid prior to assembly.
  14.  
  15. Assemble the wheel cylinder and install it to the backing plate. Assemble the remaining components and bleed the brake hydraulic system.
  16.  

 
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