Posted by JD Seller on September 18, 2017 at 20:10:14 from (208.126.196.24):
In Reply to: 1030 engine woes posted by Jon f mn on September 18, 2017 at 18:40:59:
Check for open internal oil ports. I had a JD 5020 spin the number one main bearing twice, with low hours of use. The ventilator pump was blocked off. What I did not realize was that they had also removed the drive gear and shaft form the housing. This opened an oil port that was in the vertical galley with the number one main bearing. The rear of the motor had good oil pressure but the front oil galley would loose pressure when the oil warmed up. Plugged the port and the tractor is still running 30 year later.
Your losing oil flow/pressure at the crankshaft. I am assuming the engine oil is not breaking down. So for some reason your losing the hydrodynamic bearing on the crankshaft and mains. So with the gauge showing pressure your not getting the same pressure to the lower end of the motor or you have a leak in the lower end.
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