You use those if there is a groove in the yoke wher the seal lip rides.
One thing about them is you raelly should use red locktite when you put them on (if it wasn't mentioned yet)
Hey fishy68,
Have you ever taken the spring out of a seal and shorten it to make the seal tighter around the shaft?
It works.
Take the spring out and unscrew it from itself,cut a 1/4 in off the OD end and screw it back into it'self.
Just curious if you have ever done it.
Sometimes all it takes is the smallest groove for it to not seal. I had one that wasn't pitted in the slightest and only had a groove about .015" deep and it wouldn't seal for nothing.