MakerBot Replicator Quick Start Manual - 10.
8.
We are now ready to place the new spool of filament into the filament
drawer. If the drawer is closed refer to
Step 4 on how to open. Be sure to
align the spool so that the filament feeds out clockwise and into the
guide tube (the white tube).
9.
Trim the end of the filament (if needed) so that there is a clean edge.
Begin feeding the filament into the guide tube. Continue feeding until an
inch or so of filament is sticking out of the end of the guide tube nearest
the extruder (as shown).
10.
On the front control panel select Filament > Load Filament. The
printer may need to heat back up again. Once the printer is ready the
onboard display will prompt you to insert the filament into the top of the
extruder. Follow the on screen display for instructions.