Stairmaster Stepper 4000PT Hub Assembly Troubleshooting


  1. Locate and remove the drive chain master link.
  2. Remove the drive chain.
  3. Step or push down on the left or right pedal. Both the drive sprocket and the drive shaft assembly sprocket should turn. Release the pedal. The pedal return spring should pull the pedal back to the top position, while the drive shaft assembly sprocket remains still.
  4. Repeat step 3 for the other pedal.
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