Mazda Trucks 1972-1986 Repair Guide

Upper Control Arm

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REMOVAL & INSTALLATION 1972-84 Vehicles



See Figure 1

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Fig. Fig. 1: Upper control arm removal/installation for the 1986 modelolder vehicles similar

  1. Raise and support the front end on jackstands under the frame.
  2.  
  3. Using a floor jack, raise the lower control arm until the upper control arm is off the bumper stop.
  4.  
  5. Remove the wheel.
  6.  
  7. Place a chain through the coil spring as a safety measure, or install a spring compressor.
  8.  
  9. Remove the cotter pin and nut retaining the upper ball joint.
  10.  
  11. Using a ball joint separator, disconnect the ball joint from the spindle.
  12.  
  13. Working under the hood, remove the two upper arm retaining bolts and lift the arm from the truck. Note the number and position of any shims.
  14.  
  15. Installation is the reverse of removal. Place the shims in their original locations. Torque the two arm retaining bolts to 65-75 ft. lbs.; the ball joint-to-arm bolts to 15-20 ft. lbs.; the ball joint-to-spindle nut to 40-55 ft. lbs.
  16.  

1986 Vehicles

  1. Raise and support the front end on jackstands placed under the frame.
  2.  
  3. Remove the wheels. Support the lower arm with a floor jack.
  4.  
  5. Remove the cotter pin and nut from the upper ball joint and separate the ball joint from the upper arm using a ball joint separator tool.
  6.  
  7. Remove the bushings and dust seals from the ends of the upper arm shaft.
  8.  
  9. Remove the nuts and bolts that retain the upper arm shaft to the support bracket. Note the number and location of the shims under the nuts. These must be installed in their exact locations for proper wheel alignment. Check all parts for wear or damage. Replace any suspect parts. Check the ball joint preload with a pull scale and adapter 49 0180 510B. Shake the ball joint stud a few times to make sure that it is free, then take the reading. The pull scale reading should be 40 lb. or less.
  10.  
  11. Installation is the reverse of removal. Torque the upper arm shaft mounting bolts to 60-68 ft. lbs.; the ball joint nut to 30-37 ft. lbs.
  12.  

 
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