Advice on gas ram leaks please.

[gumbob]

To have one gun go down in power is rare. Two is well....very rare

Think I'd get a second opinion from different chrono (you never know).

Regards...Ian

[lurcher]

Seem to remember reading that they should be
fired a couple of times once a month, because
otherwise the seals can stick in the ram, or something like
that.

[lance]

the first thing to check on a leaky theoben is that the schrader valve is
tight this has been a problem on several guns in my club, the easy way to check for this is to slowly unscrew the cover screw if you here a hiss
as you do this the valve is letting past and probaly needs a tweak up
with a schrader valve key.

lance

[Gwylan]

I'm probably talking rubbish, but the oil-seals on the front forks of my motorbike dry out, and leak, if I don't ride it. Do gas-rams have O-rings which may do the same?

[Rapid. 17]

I can't answer your question but i have a Taunus which is over 10 years old and only gets used occasionally these days, but the power is still just below the legal limit. Also, it has never been back to Theoben for a service.

Geoff.

[alan m]

I think i know the answer to this one Arthur! I had the same problem not long after buying a new Fenman .22. It to went down to 8, I took it over to Theobens and the guy took it into the workshop came back a few minutes later, there you go he said, I said what was the problem? Just needed pumping up a bit says he, I wasn't happy and pressed him. He didn't really want to tell me but he admited that it happens once in a while due to oil contamination on assembly which causes dieseling. And as only around 5 shots are fired to set the power it will give a false reading, but after around 500 shots or so it clears itself! that was nearly 3yrs back and its still running just under 12. The thing about loosing power if not used only applies to the early models if its an HE its ok!

[Arthur John Smithsplease]

Thanks, Alan. You've given me some hope. I'll try the pump.

[tutchi]

I think i know the answer to this one Arthur! I had the same problem not long after buying a new Fenman .22. It to went down to 8, I took it over to Theobens and the guy took it into the workshop came back a few minutes later, there you go he said, I said what was the problem? Just needed pumping up a bit says he, I wasn't happy and pressed him. He didn't really want to tell me but he admited that it happens once in a while due to oil contamination on assembly which causes dieseling. And as only around 5 shots are fired to set the power it will give a false reading, but after around 500 shots or so it clears itself! that was nearly 3yrs back and its still running just under 12. The thing about loosing power if not used only applies to the early models if its an HE its ok!

Hi
Can anyone confirm the last sentence?
Tutchi