Hi , first of all is any grease coming out of your grease gun ? What should happen is after you pump , the old grease that was in the bearings should be pushed out by the new grease you pumped in .
What I would do is get a paper towel , and pump the grease gun on to the paper towel and see how much grease comes out if your gun , i think that is the problem , let me know .
If everyone is thinking alike, then somebody isn't thinking.
George S. Patton