Canon ImageFormula R10 User Manual page 58

Separation Pad: 10,000 sheets
Furthermore, the counter in the scanner that records the number of pages
fed also needs to be reset when you replace the rollers.
For details on resetting the counter, see "Environmental Settings" on p.42.
This message only serves as a rough guide for when to replace the
feed roller and separation pad.
They may wear out sooner if, for example, a lot of pages with rough
surfaces are scanned.
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