alright thanks for posting fellas, I unscrewed the low oil Pressure sending unit and put in a gauge and stated the 5011 and no pressure. I then unscrewed the gauge and left an open port and started the tractor up, no oil came out of the port, i waited for about 30 seconds and a little bit vibrated out but not enough to seam like there is any flow. I pulled the valve covers off and there doesn't seam like there is much flow happening. something is blocking the flow or its the oil pump. anyone know where the pump is and have a schematic or something. Thanks, the tractor only has 900 hours and has been only used for light loader work. I got it last year and have hardly used it. I never had this problem with the 5211 and put 8000 hours on it.