MMU2S to MMU3 upgrade chimney base. Do I have to canabalize the old one for the brass insert?
 
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MMU2S to MMU3 upgrade chimney base. Do I have to canabalize the old one for the brass insert?  

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Charon
(@charon)
Active Member
MMU2S to MMU3 upgrade chimney base. Do I have to canabalize the old one for the brass insert?

I got the upgrade kit from Prusa a long while back and just getting to actually installing it. Was it supposed to come with an upgraded chimney base? The one I have from the MMU2 as shown in the attached photo does not match the upgrade manual. 

Did I misplace the base? Or is it recommended to print a new base and extract the brass insert from this old chimney? 

I have already completed the MK3S+ upgrade and been printing with it for a while, and am now trying to finish the MMU3 upgrade. 

Best Answer by Charon:

I removed the brass insert from the mmu2 chimney, and am printing the mmu3 extruder chimney, hope it works out. 

Napsal : 23/02/2026 4:52 am
Charon
(@charon)
Active Member
Topic starter answered:
RE: MMU2S to MMU3 upgrade chimney base. Do I have to canabalize the old one for the brass insert?

I removed the brass insert from the mmu2 chimney, and am printing the mmu3 extruder chimney, hope it works out. 

Napsal : 23/02/2026 5:15 am
Charon
(@charon)
Active Member
Topic starter answered:
RE: MMU2S to MMU3 upgrade chimney base. Do I have to canabalize the old one for the brass insert?

Seems to have worked. Used a panavice to press the brass insert into the new part. 

Napsal : 24/02/2026 5:22 pm
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