Is this hotend PTFE tube normal height?
tl:dr Does this PTFE tube height look correct, when inserted into the extruder assembly?
I was having issues loading filament, always resulting in a retract by the MMU2. Having experienced this before, I figured there had to be some filament stuck in the hotend PTFE tube. Upon inspection, I found a piece stuck in the PTFE tube.
I also noticed that the top of the tube was not visible at all. Whereas upon the upgrade to the MK3S+ MMU2 I was able to see the very top of the PTFE tube under the bondtech gear, now I was unable to see it.
I elected to partially disassemble the extruder to inspect the hotend PTFE tube. The top of the tube was damaged so I grabbed a spare I purchased a while back, double checked it was the correct Length: 42.3 mm and inserted it following the instructions.
When I attempted to place it into the assemble, it looked like it was too tall for a groove in the assembly? I don't recall this prior, so not sure if this is correct?
RE: Is this hotend PTFE tube normal height?
make sure you've done green and purple correct
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RE: Is this hotend PTFE tube normal height?
According to these instructions, the tube does indeed protrude above the heat sink.
https://help.prusa3d.com/guide/how-to-replace-a-hotend-ptfe-tube-mk3s-mk3s-mk2-5s-mmu2s_21664
44.3mm should be the correct length.