Hello Tom. Still working for you Now? I have this same unit as you know. I installed an electric pump some time back and that has worked out for stalling as you know. Your find of the oil pressure sensor is good info and I will be checking into mine also as time moves on. I know now where it is and may just by pass it once in that cube area. My latest issue with this thing is the right side drive seems like it stopped once it gets hot it just stops pulling. Now this is either linkage, Relief valves or the pump drive that is belt driven. could be just a belt and wrong tension but I have my doubts. May even be at the chains and what drives that whole mess of mechanical nightmare. The issue I have is the time to do a complete tear down. So as this moves forward, I hope. I will post any results or finds. All the info from the many help all or make a person aware what to maintain and keep in mind for later. Anyway know that all your info helped me and possibly others. Take care.