Original Prusa MK4 - STEP 17 Print Fan Blower: Parts Preparation; STEP 18 Assembling the Print Fan Case

4B. Upgrading the Nextruder (MMU3)
Original Prusa MK4/MK3.9 to MK4S/MK3.9S upgrade 79
STEP 17 Print fan blower: parts preparation
For the following steps, please prepare:
MK4S Print fan blower (1x)
Fan-case (1x)
Fan-case-cover (1x)
Fan-shroud (1x)
3x8sT screw (2x)
M3x5rT screw (5x)
M3nS nut (5x)
STEP 18 Assembling the print fan case
From the flat surface of the Fan-case, insert two M3nS nut all the way into the
holes.
Double-check from the side that the inserted nut is aligned with the hole in the
part.
From the opposite side, insert two M3nS nuts all the way into the holes. Check that
nuts are fully inserted.
Insert one M3nS nut into the hole in the Fan-shroud.