IBM 1800409-001A - Manual (Page 224)

Cleaning Register and Transfer Rollers
Clean the metal and rubber register rollers and the transfer roller
every 20,000 copies or 12 months, whichever comes first. This is
roughly the same time schedule as replacing the OPC belt cartridge
and cleaning the paper exit rollers, so you may want to do all of
these procedures at the same time.
All you need for this procedure are 2 or 3 pieces of lint-free, cotton
cloth. To clean the rollers
1. Open the back cover by pressing the top-right corner (fig.
6.16).
Fig. 6.16 Open the Back Cover
Chapter 6
6 - 3 4 C o n s u m a b l e s a n d P r e v e n t a t i v e M a i n t e n a n c e