Grease every where

BadgerMcAdams wrote:
The problem is that once all the space is filled with grease, any time you add an additional squirt or two, it has to go someplace. Now if grease is like water, it doesn't compress (or at least doesn't compress much). The weak spot on the whole thing is the seal at the back. The grease will squeeze through where the seal touches the spindle. Or, it will just use hydraulic action and push the seal out.

To steal the words of a great Engineer, Mr. Scott, "Ya canna break the laws of Physics!"

Actually the more pressure you put on the seal, up to a point of course, the better the seal will work. If the grease won't compress it will expand the very soft rubber plug like it's designed to do. That is the point of least resistance. Check out the schematic.