definitly not normal for oil pressure to drop off when warm.that tells you have increased brg clearance and the pump cant hold the pressure. at idle the guage still should be around 3/4 to the end, not dropping to 1/4. these guages are manual oil operated without sending units.what you are saying about your tractor by increasing with heavier oil is true because your brgs are worn also.
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Today's Featured Article - More Memories of a Field Service Engineer - by Brian Dye. Introduction: The author worked for one of the largest Ford tractor dealerships in England as a trouble-shooter on tractor engines, hydraulics and combine harvesters from 1963 to 1972. In 1972 he became a dealer manager and finally left the dealer net in 1975 to run his own electronic design and manufacturing company. [Editor] We live right in the middle of Norfolk. The dealership that I worked for sold Fordson Tractors from the 1920's and some of t
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