Currently running our 2001 MX 240 on the sprayer and have issues with it getting the oil too hot. Have the pump on the sprayer returning the oil back to the tractor thru the motor return outlet and the auto booms return back thru the svc outlet. Trying to run on the least amount of oil to the water pump but still gets hot once in a while.  Dealer said to back the screw out on the hydralic motor on the pump says restricting the oil to much but as soon as I do that the pump won't run. What am I missing?