Bought a 763 f series and it creeps forword when you take your hands off the sticks. Took the plate off the top of the aluminum pices, on top the pumps. I see that there are two square pices bolted to that. There is ware on them as well as the round cam deals that are atached to the aluminum deals that are atached to the pump. If I were to replace the two square deals bolted to that plate i removed(replace insted of turn around because they have already been turned) And turn the round cam deals should that take care of my problem??