Posted by Zsprankle on September 02, 2022 at 18:26:35 from (67.163.204.143):
Hey guys, first post here. 2 years ago I gave my 1948 Farmall c a freshen up, tore just about everything down behind the bell housing with all new seals gaskets.. etc, I didn't touch the engine because I had been into it a handful of years back and everything looked good and it ran great, long story short I got her all painted and freshened up the summer before last. I was brush hogging with it at the end of last summer when it didn't lose oil pressure but slowly dropped to nothing within about an hour of mowing one day, so I stopped and put her away only to tear her down last winter to find the rod and crank bearings were severely worn, plus the oil pump cover was shot. So with the help of my machinist father, I got them measured up and rolled in some new bearings and refinished the oil pump plate. Everything was within spec and got put back together, some running, no hard work and an oil change later, she's back on the mower, problem still persists although not nearly as bad. On first startup when the oil is cold she holds 65 pounds of oil pressure at full throttle, it takes about 10 minutes of mowing to the the oil warmed up and then she's down to a steady 45 to 50 all day long no issues there. The problem comes when I idle her down, I think it starts knocking although it still holds oil pressure, granted not very much. I'll attach a video of what's going on, I think it might be time for a new oil pump plate, because I think that one may be warping when hot but I don't know, and input is appreicated, thanks. https://photos.app.goo.gl/EdPiCkETdxC9hoPF9
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