Brother MP-21C Service Manual page 83

<Reassembly>
Note: Attach the Gear shaft 4 calking ASSY to the Chassis R, with the two grooves
of the Gear shaft 4 calking ASSY fitting over the Chassis R. Secure it using
the screw.
Two grooves
Chassis R
(2) Separate the Connection switching arm from the Chassis R by pressing the end of
the Connection switching arm from the other side of the Chassis R.
Chassis R
Connection switching arm
Fig. 3.43
Maintenance driving gear 40
Main roller ASSY
Fig. 3.44
III-30
Gear shaft 4 calking ASSY
Maintenance driving gear 16