Ricoh SP 8400DN Field Service Manual page 1437

One-way Clutches
This machine adapts one-way clutches, used for paper feed mechanism.
Each one-way clutch locations are pointed below.
Paper Feed/Bypass
Duplex
No.
(1) Duplex exit roller
(2) Bypass Paper Feed Roller
(3) Bypass Pick-up Roller
Description
7.Detailed Descriptions
699