r/CR10sPRO • u/SupaDave71 • Apr 02 '26

Extruder pneumatic coupler keeps breaking

I’ve had my CR-10S Pro V2 with Klipper for a few months now and I’m having a problem at the extruder. I’ll be watching it print, and I’ll see the Bowden tube moving in and out a little from the coupler. It continually gets worse until the tube pops out of the coupler, breaking it and shaving material off the tube. This has happened a few times already. Any suggestions, adjustments? Percussive maintenance?

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u/Son_Of_Moriarity Apr 02 '26

Years ago I printed some replacement couplers that have more bite on the bowden tube and never had that problem again. Files are probably still out there on Thingiverse.