Instructions

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Electronic Coil Spring Tester - 7350

Digital Coil Spring Rater Instructions - Part number 7350

  • Place load cell base (8" square) in the bottom of the tester. Notice the dowel pin alignment holes.
  • Connect the digital display yellow cable to the load cell base. Turn the display on and allow it to warm up for about 5 minutes or so.
  • Attach the U-shaped aluminum dial indicator bracket to the lower slider on the right hand side of the frame. Notice that the dial indicator works off the load cell base.
  • Install the spring into the tester. Remove the 2 large black handle pins and lower the upper spring seat until it rests on the top of the spring. Reinstall the 2 pins until fully seated. (It may be necessary to move the upper seat up slightly until the first available set of holes line up.
  • Note: The top spring cup has one side for square end springs (coil over) and the other side for pigtail springs. Make sure the pigtail is up against the step.
  • Close the valve at the base of the jack (black t-handle) and pump until the spring touches on both ends.
  • Slide the aluminum dial indicator bracket down until the dial indicator just touches the load cell base. Rotate the outer dial so the pointer reads zero.
  • Preload the spring by compressing 1". This is very important and should be done accurately. You may alternatively use .5" (1/2") depending on the spring quality as long as you always use the same amount.
  • Push the ZERO button on the digital readout to zero the display.
  • Again slide the aluminum dial indicator bracket down until the dial indicator just touches the load cell base. Rotate the outer dial so the pointer reads zero.
  • Using the dial indicator to measure, compress the spring exactly 1" (10 revs of the large pointer or 2 revs on the small pointer).
  • At this point the digital display will show the spring rate (in lbs./in. of compression). Open the valve at the base to release the spring.
  • NOTICE: Disregard special function mode on digital readout as that is used for our Winston Cup Gas Weighing System.

DANGER: Compressed coil springs are dangerous. If one comes out of the tester it can cause severe injury or death.

 

  • NEVER compress a spring beyond the capacity of the tester.
  • NEVER compress a spring that bows to one side or does not compress straight.
  • NEVER compress a spring that is not properly seated completely within both spring seats.
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