Originally Posted by UnSean
Hmm thanks for that, I had a quick look under the wheel cap and I do not think I have a tool to remove the cap, it also looks as if it has been off already! (This was a new scope in October 2013) I probably have a returned scope resold as new.
It was slick for a month or so , now it is like turning it through grit.
Sound's like the o ring has broke,Just remove the black hub not the Brass insert.
The o ring is very fine and if it was a bit dry to start with may have bound up and snapped.
No need to replace just put some grease inside the black hub and replace.