The owners manual maintenance chart says the HST neutral spring needs to be adjusted at 100, 200, 300, 500, 600, and 700 hours. I was thinking it needed to be adjusted at 50 hours. The owners manual says to consult the dealer. I have not looked at how it is made yet, I am sure I can figure out how to adjust it. I thought that Kubota may have a specified amount of time for the pedal to return.