Olivetti d-Color MF2613 Plus Service Manual page 206

5. Check or replace the developing unit
and refit all the removed parts.
NOTE:
*: Remove the cap before installing the new
developing unit.
*: When reinstalling the developing unit,
press it down until the lever of developing
unit is engaged with the notch.
*: If it is difficult to engage the lever, press
the unit down while rotating the gear to
engage it.
Service Manual
New
developing
unit
Lever
Developing unit
1-5-20
Cap
Lever
Notch
Gear
Figure 1-5-29
2PX/2PY
Notch
Y116670-7