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Pneumatic Fitting

This is the thing that holds a PTFE tube in something. They break fairly often and the only thing you can do with a broken one is replace it.

Ther have a bunch of metal teeth pointing into the fitting. They let the tube go in, but not out. If you can just pull the tube out, it’s broken.

There is a collar on the fitting. If you press it down it holds the teeth back and you can pull the tube out. Sometimes there is a clip under the collar and you have to take the clip out before you can push the collar down. If the tube does not come out when you press the collar down, the fitting is broken.

You don’t really need the clip. There is a spring under the collar and it will normally keep it unpressed. The clip helps if the collar gets pressed by accident.

If you have a broken fitting and can not get the tube out, unscrew the fitting and take the tube out of the fitting on the other end. Now the fitting should slide down and off the other end.

If the fitting on the other end is broken too, unscrew them both, cut the tube to get one off and slide the other off.

If you cut the tube and it is too short now, replace the tube. You can get both the fittings and tube on Amazon. Get a piece of tubing longer than you need and cut it. When you cut it try to make the curt flat and perpendicular. The sell cutters that hold the tube and have a knife in them on Amazon. Some tubes on Amazon will come with a cutter.