If the compressor is not at fault, either there is a restriction closing off flow when the cannon is up to pressure, or the gauge on the cannon is not indicating the correct pressure.

I have had the gasket in the fill adapter get grease in it which expands the rubber, which permits filling as ...

I have now gone straight through from the compressor to the valve on the cannon but still only pumps to 40 psi or so, i borrowed a shock pump from a friend and went from the 40 psi to about 100 psi but that was about 100 pumps or so.

jackssmirkingrevenge wrote:What about the filling attachment, maybe it has an in-built limiter for 40 psi?

I am using a tyre inflator attachment but not sure if it has any kind of built in limiter will have to look into that one.

the regulator is at its highest setting and showing about 115 psi or so on the gauge, all new to me this and it has got me puzzled.

What happens at 40 psi, does it start to leak or can't the compressor cope? If you block off the compressor pipe will it pressurise it any higher?

Very nice first effort by the way, given the copper construction you should consider buying a shock pump or adapting a fridge compressor in order to ...

I joined the forum about a month or so ago and after having a good look around the forum thought it was time i had a go myself and the attached pic is the result, the problem i am having is i can only get it up to about 40 psi that is using a clark air compressor, what am i doing wrong ? would ...