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Bowden tube pops off pneumatic fitting

I'm having trouble making prints because the Bowden tube won't stay connected to the pneumatic fitting on the top of the filament drive. When printing starts, the filament pushes up the Bowden tube which then causes filament to stop exiting the extruder. I was able to print a "Bowden lock" by holding the tube down by hand during printing, but the lock itself doesn't work. The filament still pushes the tube out of the fitting even when the top of the fitting is raised. It doesn't seem to have enough grip on the tube. Does anyone know how I can get the tube to stay connected?

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Try jamming the tube down into the fitting and, while pushing down on the tube, pry up on the locking ring at the same time. Before running the next print, wrap either a plastic coated twist-tie around the gap in the connector or an appropriately thick piece of copper wire. Whatever you can wrap it with that prevents the locking ring from moving downward during operation. I've done this exact thing and now the Bowden tube is pretty much in there permanently.

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Thanks, Gary. The zip tie actually helped because when I pulled it tight, it forced the locking ring to pop out, which allowed me to push the tube in further. Once I pushed the locking ring in again, everything stayed snug. Problem solved!


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Mike Stanton will be eternally grateful.
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