I only found 2 zerk fittings on my runner. After searching here, I see that there are 6 of them. I greased up the 2 that I found. One on the front of the drive shaft and one on the back of the drive shaft. When I greased up the back, it only took a few pumps before it started oozing out. On the front, however, it was a different story. I pumped a good amount in but never saw any grease ooze out anywhere. Is it possible to pump to much grease in?