I have a Cub cadet GT2544 and the deck spindles seem to not hold grease in them. After about 3 hours of mowing i could probably but 10 pumps of grease in every spindle. The manual just gives generic service intervals which seem way to long. I generally try to grease the spindles about every 2 to three hours of mowing. I fill them until i can hear the grease popping out because its full. I have read through some other posts that may suggest that i am over filling them. Any thoughts?