Help - How do I remove caps on steel rods

[Kent]

Thanks Scott, and I may have to do that. If I do I would end up also having to replace one of the side rollers (see attached pictures). I was wondering if I cut out the middle roller (the one that I need to replace anyway) if I might be able to grip the steel rod there, with a pair of vice grips, and then tap the side of the vice grips, and in the process pop off one of the caps?

[inline "Roller side view.jpg"]

[inline "Roller front view.jpg"]
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