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madzteir

Olsson Block installation woes -- old nozzle won't loosen

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I recently purchased an Olsson Block for my UM2 (and am really excited about it!) but in disassembling my printer for the new nozzle, I ran into trouble with this step: https://ultimaker.com/en/support/18016-disassembling-the-hot-end

Specifically, the hot end did not drop down. It is very much stuck to the isolator. I have turned it as much as I can, but am now leaving marks and deformations on the isolator by trying to turn it more.

What can I do?

Also, as a side note, I was looking for a PTFE ring to remove, and it appears there isn't one: I can't find it anywhere. Is that cause for concern?

Edited by Guest

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Latest UM2 had a spare stainless steel coupler as a spare part with them. That is probably the easiest way. Otherwise try to unscrew it HOT and some people also used WD40. If everything goes wrong you may get a spare stainless steel coupler from your Ultimaker dealer/distributor or maybe more easily from 3dSolex.

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