Quote Originally Posted by Neil54 View Post
If a gas ram could be charged with air, I could do it myself.
Now a pressure vessel. I could use the cylinder off my pcp complete with quick fill.

Now what pressure in bar would create 40kg force?
aren't all the modern gas rams sealed units that you can't alter the pressure on mate? If you've got one like a theoben ram with a valve in it I would say use a stirrup or scissor pump as it's easy to over fill them, the theoben ones don't take much pressure at all. There's a vast difference between the he and none he rams too in terms of operating pressure. Forgive me if I'm teaching my granny to suck eggs here by the way. Probably should have asked at the start, what ram you pressurising?