The above noted rollers have the same roller and hub but differ
only in the part # and how they are assembled.
RL1-1370 roller contains internal spring loaded parts that must be
recycled from old roller and installed in new roller.
Exploded view ~RM1-6313/RM1-0731:
The RM1-6313 and RM1-0731 rollers are complete assemblies that
simply snap in the printer. The difference on the rubber coated
idler rollers vs. plastic idler rollers (on the outside of the
main roller) has not affected print performance.
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