I had a shot Ford 4000 rear oil main on a purchased tractor once...salvage value sale. Oil pressure registered zero. I hoped for the best but Murphy had control and it was the worst....but that's what I paid for so why gripe?
When I moved from gas tractors to diesels what came to mind was where the wear occurs. With the higher compression, the "Bottom End" takes the beating whereby with gas the hotter combustion works over the Top End. There was one exception for me and that was the 3000 Ford purchase. It was at around 4500 hrs and PO had run it for who knows how long with the intake manifold - oil bath air filter hose off. Looking at the rest of the tractor it had seen some rough, dirty environment, service. The pistons had to be replaced along with the rings with the bottom end rework. My first diesel....I was naive at the time, paid market price, should have known that in April, in Texas, you don't need ether to start a diesel tractor. Don't care how you look at it, an education costs money. Smiley Face.
Easy enough to drop the pan, pop a main and rod cap, install some plastigauge, put it back, roll it over, pull out the gauge and you will have your answer. Probably 2 hours work at the most. If the Babbit is worn off the inserts that is a pretty good sign of the smoking gun. Doing a bottom end inframe isn't all that big of a deal....like for me an easy one man job.
On the pump you are looking at 30-50 psig....my JDs had a popoff at 30, my '60s vintage Fords run 55. As I recall cranking compression is around 400 give or take....I'd forget the pump.
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Today's Featured Article - Product Review: Black Tire Paint - by Staff. I have been fortunate in that two of my tractors have had rear tires that were in great shape when I bought the tractor. My model "H" even had the old style fronts with plenty of tread. My "L" fronts were mismatched Sears Guardsman snow tires, which I promptly tossed. Well, although these tires were in good shape as far as tread was concerned, they looked real sad. All were flat, but new tubes fixed that. In addition to years and years of scuffing and fading, they had paint splattered on
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