excaliber 22 air rifle leaking

[ken69]

I am fairly sure these are very similar to the Webley Axsor. When I had a leak on my Axsor I missed the very small O ring inside the fill valve and eventually found that to be the problem. I didn't like doing it at the time but found it by submerging the front of the rifle in a dish of clean water and seeing exactly where the bubbles were coming from. There is an exploded diagram on Chambers website that shows the O ring OR068. It had dried out completely and was rock hard. Took some getting out as well if I remember correctly