sent an adjustment knob assembly for a NordicTrack Achiever to me. He was curious about how to disassemble it. I covered that in a previous Instructable
. This Instructable is also mostly for him, but covers how I rebuilt the stripped mechanism with common parts from a hardware store. I really hoped I could accomplish a rebuild with only a little cutting, drilling, and grinding; but, I found I needed to weld some pieces to finish the job.
See the second photo. The screw mechanism in these assemblies wears easily. So does the plastic block that moves with the screw. The task is to build a new traveler block and a new screw, and make it all fit into the original case.