My concern about using a puller would be if the key on the axle has worn a grove in the wheel from the constant forward and reversing action of general usage. That would mean there is some slop in the wheel on the shaft causing slight forward and backward play. This would then mean you would have to hope the wheel is jammed on and by coincidence the keyway is aligned in its original position to allow easy removal with a puller otherwise you'll do some serious damage. Sounds confusing.
