Oki B6500 Service Manual page 215

It is also possible to remove the ROLL ASSEMBLY RETARD by pushing the HOLDER
RETARD down (Figure 2).
Replacement
1) Install the ROLL ASSEMBLY RETARD to the SHAFT RETARD (PL 12.3), and secure the ROLL
ASSEMBLY RETARD with the hook.
When installing, do not touch the roller surface of the ROLL ASSEMBLY RETARD.
Be sure to install the hook of the ROLL ASSEMBLY RETARD into the groove of the
SHAFT RETARD.
2) Move the HOLDER RETARD (PL 3.1) in the opposite direction of the arrow, and install it to the 550
PAPER CASSETTE.
After installing, make sure the HOLDER RETARD comes back to the former position with
the spring force of the SPRING RETARD (PL 12.3), when pushing down the HOLDER
RETARD and then release the finger from it.
3) Install the 550 PAPER CASSETTE to the printer.
Chapter 3 Removal and Replacement Procedures (RRPs)
Figure 2. Holder Retard
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