Change the coolant now with a HD diesel rated concentrate mixed with distilled, not tap water. Old antifreeze turns acidic when the corrosion inhibiter wears out. You don"t want to pay for sleeve replacements . The transmission oil is likely just as icky as the engine oil . Drain , change filter and refill with Hy-gard. Put a real pressure gauge on there and test the engine oil pressure. Old gauges do go out of calibration with age but do you feel lucky? The 4040 is a pretty decent little tractor. iirc it has a Dubuque engine in a Waterloo chassis. I know it costs $$$ but save yourself $$$ in the long run by purchasing the operator"s and service manual. 1-800-522-7448. The parts manual is online at the JD web site.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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