Hi. I have an old Silca Floor pump that has a head that I do not see anywhere. It can be changed from Presta to Schraeder by reversing which side of the central barrel is facing "out". Top cap is unscrewed, barrel flipped, cap screwed back on. My problem is that it is leaking at that "O"-ring which seats into the "bottom" cap. I cannot find mention of this part anywhere including Silca's Site, and it feels like it will crumble apart if I try to remove it to match it up.to a new one.....where??
Can anyone point me in the right direction towards a fix for this? I would really not want to buy a new head if I can get away with either a rubber ring or that whole ring-hose-fitting bit.
Thanks!