Guys can this o-ring be replaced with the filler valve body in place, or should I remove the filler valve body from the cylinder ??

Ok guys thanks for the help I shall strip the valve out and have a look.

The leak is from the filler valve where it screws into the filler valve body.

Where the filler valve screws into the filler valve body, should there be two o-rings ?

Yes sorry, thought I'd metioned the spring, it was the complete service kit spring and seals.
It appears its leaking from the threads where the filler valve screws into the end of the cylinder, would adding a couple of wraps of pfte tape be ok ??

It's close Fit but not snug, it doesn't mark your Barrel up when you slide it on, and yes it has a grub screw to lock it in place.

I originally had an air leak on my S410 from the filler valve ( new style T-bar valve) which I have now serviced with a filler valve service kit. The seals were replaced with care and attention and I used a little silicone oil on each seal to lubricate it prior to fitting the seals. However the leak...

I've recently tried Daystate ft heavys in mine, very pleased with results, 5p sized groups at 40 yds.

Hi, I have for sale a Rowan Engineering Barrel Sleeve .177 The Sleeve will fit s400-410 rifles and only on barrels without the rosebud Barrel Sleeve The Barrel Sleeve is finished in natural aliminium I bought this originally to fit on my rifle but was never fitted and I have now sold the rifle The S...

I also wondered about the accuracy of the bottle guage and rifle guage, however both read approx the same I also filled the gun again to 190 bar from another divers bottle incase the gauge on my bottle was reading low. Unfortunately I only have access to one chrono so not sure how accurate or inaccu...