Calculated Industries 6414 - Manual (Page 40)

Remove wheel hub cover Turn counter-clockwise
3) Remove the wheel hub cover from the threaded axle shaft.
4) Remove the old wheel from the unit.
5) Place the wheel on the threaded axle shaft. IMPORTANT:
The flat spot inside the wheel hole MUST be aligned to the
flat spot on the threaded axle shaft in order for the unit to
measure properly.
threaded axle shaft
38 – DigiRoller/DigiRoller Plus ™