ION 2006-2007

Brake Shoes

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Adjustment



The Saturn features a self-adjuster mechanism that is part of the brake assembly and compensates for normal brake lining wear. No external adjustment is necessary or possible.

When the brake shoes or components of the brake assembly are replaced, the inside diameter of the drum should be measured using a brake shoe clearance gauge. The outer diameter of the brake shoes should then be given the base setting of 0.020 in. (0.5mm) less than the drum's inner diameter. The automatic adjuster will take care of all adjustments from that point.

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:

    Wheels and brake drums
     
    Adjuster spring using a universal brake spring remover. Do not over extend the springs or they will damaged and will need to be replaced.
     
    Brake adjuster lever from the pivot
     
    Spread the top of the shoes apart using brake shoe spanner and spring removal tool J 38400
     
    Adjuster assembly
     
    Lightly pull the universal spring end out of the shoe web hole using the hook end of J 38400. Hold the universal spring while removing the trailing shoe.
     
    Park brake cable from the lever
     
    Lightly pull the universal spring end out of the shoe web hole using the hook end of J 38400. Hold the universal spring while removing the leading shoe.
     

  4.  
  5. Inspect the wheel cylinder for signs of leakage and for cut or damaged boots. Do not attempt to repair a damaged cylinder, the assembly must be replaced.
  6.  

To install:

  1. Lubricate the adjuster assembly, the 6 backing plate raised shoe contact pads, the brake lever pin and surfaces which contact brake shoe webs with brake lubricant.
  2.  
  3. Install or connect the following:

    Position the hook end of tool J 38400 under the universal spring and lightly pull the spring end out while installing the leading shoe. Make sure the spring is properly engaged in the shoe web hole.
     
    Park brake cable to the lever
     
    Position the hook end of tool J 38400 under the universal spring and lightly pull the spring end out while installing the trailing shoe. Make sure the spring is properly engaged in the shoe web hole.
     
    Spread the top of the shoes apart using tool J 38400
     
    Adjuster assembly
     
    Adjuster actuator lever to the shoe and adjuster assembly. Make sure the lever is engaged properly between the adjuster and the shoe.
     
    Adjuster spring. Make sure the loop end of the spring engages properly to the tab on the actuator lever
     

  4.  
  5. Release the parking brake.
  6.  
  7. Pull the parking lever boot away from the console after applying light pressure inwards on the boot retainer, this will allow access to the cable adjusting nut.
  8.  
  9. Release the tension on the cable. Make sure to use hand tools only when adjusting the nut.
  10.  
  11. Using a suitable drum clearance gauge, measure the inner diameter of the brake drum and adjust the outside diameter of the brake shoes using the adjuster screw to 0.025 inch (0.50mm) less than the inner diameter of the drum.
  12.  
  13. Repeat the procedure for the opposite brake shoes and install the brake drums.
  14.  
  15. Adjust the parking park and install the lever boot.
  16.  
  17. If the wheel cylinders have been replaced, bleed the hydraulic brake system.
  18.  
  19. Install the rear wheels.
  20.  

 
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