1. Introduction
8 Original Prusa MK4/MK3.9 to MK4S/MK3.9S upgrade
STEP 4 Getting the necessary tools
Use the tools that came with your MK4/MK3.9 printer.
For this upgrade you will need:
2.5mm Allen key
Torx key T6
Torx key T10/8
Wrench 13-16
Universal wrench
Brass brush for cleaning the hotend
STEP 5 Labels guide
All the boxes and bags including
parts for the build are labeled.
The labels include the list of
contents and part count.
You can download a Cheatsheet
with 1:1 fastener drawings from our
site prusa.io/cheatsheet-mk4s.
Print it at 100 %, don't rescale it,
otherwise, it won't work.
For PRUSA veterans: Fasteners are
divided into individual bags
according to its type. Not into
packages for individual chapters, as
it was with previous printers.