FX Figuring out how to use this valve removal tool from Bagnall & Kirkwood

[OatmealMu]

I recently purchased a valve removal tool. I'm trying to avoid damaging anything, so I want to be crystal clear on how to use it. Is the screw on the end intended to catch on the edge of the valve seat? There's a video of someone using it, but I'm not entirely sure what they're doing. They're rotating the knurled bit, but I'm not sure to what end.

Thanks.

 

[filmbuffer]

The video you are looking for is actually on the valve removal tool page on Bagnall's site. Go 5 mins in and you can watch him using it.

CUSTOM: FX Valve Seat Removal Tool - Bagnall and Kirkwood Airgun Spares

Finally, the tool we have all been waiting for!!! Introducing the FX valve seat removal tool! A tool we have been asked for for years and it is finally here. No more frustration or damage removing the seat! Suitable for the following FX valve seats: 19217, 2024C These are used on the following...

spares.bagnallandkirkwood.co.uk

 

[DesertSilver]

Turning the knurled knob causes a lip to move out from the shaft and catch the back side of the seat so you can pull it out.

 

[OatmealMu]

Okay, I figured it out. The valve seat was in there so tight that I thought I was doing something wrong. I had to really tighten things down so the lip expanded enough. And having to both push the tool into the gun while both pulling and turning the knob is awkward, but it does work... eventually.

For those curious, here's some pictures to give a better idea of how it works. There are little grooves on the bottom of the screw head that bite into the delrin when you pull and turn the knob on the other end: