Originally Posted by AndrewP
There is the little nut on the centre of the valve stem that you must undo to let air in the tube. The nut eubi was talking about is the one at the base of the valve that clamps against the rim - this should not be screwed tight. To avoid bending the valve centre pin, you must pull the pump chuck straight off the valve without wriggling it around.
OK. There's the little valve at the end -- I know that one must be loose to fill the tube and then you screw it back afterwards.
There's another nut? There was another one that I just put near the rim. I wasn't sure what the purpose of that one was other than to keep the valve from being pushed up into the rim.
It sounds like my main problem might be wriggling the pump chuck (is that what it's called?) rather than pulling it straight off.