- unscrew the little stem valve, it will remain on a small metal stick
- screw the adaptor onto the stem
- with the lever down, place the pump head onto the adaptor
- raise the lever
- pump air
- lower the lever again and remove the pump head
- unscrew the adaptor.
- if necessary, as the adaptor clears the threads so you can see the small stem, then grab the stem with needlenose pliers as soon as possible, then continue unscrewing the adaptor
- then rescrew the stem down quickly