parawolf wrote:Stay away from the silca track pump. If you are not careful you can very easily tear the valve out from the inner tube.
I have no idea where this "easily" business comes from.. I've never managed to do this.... since reading this thing many months ago, I actually made an effort try try and rip a valve off an old tube using my Silca and didn't succeed...
I have been using my Silca (old brass fitting) for 6 or 7 years and only started to have the valve ripping problem about 12 months ago. I had a terrible run for a while before working a solution.
Prior to this issue I would have said it is a simple idiot proof pump for all.
You know the little rubber O ring grommit that sits inside the brass screw head ? It gets worn over time and harder to grip on valve stem under pressures > 100psi.
I found I replaced it about every 2 years or so. Well, my problems occured after I had replaced it last year.
My theory - I think silca or their supplier have changed the diameter of the hole or the consistancy of the rubber. Result - it is too tight........the problem is magnified if one uses threaded valve inner tubes (eg Continental race light).
If you are unlucky enough to get the new type of O Ring, When new, stretch it out with a Biro or similar.
A bit of spit or even a touch of lube prior to pumping.
Stop using threaded valves.
Despite our troubles I still love the Silca and have been rip free for many months now.