I am unfamiliar with this engine, but, could have an oil thermostat and an oil cooler? Also, what rpm is the engine idling at? We had 340u IH tractor that had ZERO oil pressure at idle when hot. When we had to let it idle hot, we just raised the RPM a little-maybe 1000RPM. I was a kid back then and we ran it that way for years. When I grew up and became a mechanic, I told Dad I was going shim the relief in the oil pump. It raised the idle oil pressure, and the high idle pressure also, but it did not exceed 60 psi. Mark.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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