Prusa Research i3 MK3S+, Manual

Page: 22 / 144

2. Y-axis assembly
22 Original Prusa i3 MK3S+ kit assembly
STEP 13 Preparing Y-belt-idler (part 2)
Take the Y-belt-idler and insert two M3n nuts from the top.
Turn the idler to the other side and insert the M3nN nyloc nut. The rubber inside
the nut must be facing towards you. BE CAREFUL , don't over tighten the screw, you
can break the part!
Make sure all three nuts are all the way in.
In case you can't press the nuts in, don't use excessive force. Take M3 screw thread
it from the opposite side of the printed part, as you tighten the screw, it will pull the
nut in. Be careful not to break the idler during tightening.
STEP 14 Preparing Y-belt-idler (part 3)
Insert the prepared bearing in the Y-belt-idler.
Bearing housing orientation doesn't matter.
Secure the bearing with the M3x18 screw. Don't fully tighten the screw.
Place your finger on the bearing and ensure it can rotate freely. If needed adjust the
screw.