Thanks for the reply. I found the same thing in my parts manuals as well. I actually took it one step further and looked in a WD-6 parts manual (dated 1947) and it listed the 0-75 PSI gauge as well (At least until 1947). For my WD-9, the old rusted gauge I removed was a 0-75 gauge that actually had numbers on it instead of the original type with the white/red zones. Is there any chance that there is an error in the parts manuals where the later tractors actually used the 0-75 PSI gauge? It does seem strange to me that according to the parts manuals the oil pressure gauge was changed to a lower pressure gauge at S/N 12426 implying that the lubricating system pressure may also have been reduced at that point. I would have thought that any design change would have been for higher oil pressure. The fact that my 1952 WD-9 did have a 0-75 PSI gauge (likely not original) and the new replacement 0-45 PSI gets pegged full scale makes me wonder. The tractor has 9300 hours on it so I actually doubt that it has fantastic oil pressure! I may just order a 0-75 PSI gauge for the tractor.
Would anyone who has a later production WD-9 be able to check the part number of their oil pressure gauge?
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Today's Featured Article - Good As New - by Bill Goodwin. In the summer of 1995, my father, Russ Goodwin, and I acquired the 1945 Farmall B that my grandfather used as an overseer on a farm in Waynesboro, Georgia. After my grandfather’s death in 1955, J.P. Rollins, son of the landowner, used the tractor. In the winter 1985, while in his possession the engine block cracked and was unrepairable. He had told my father
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