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I've got one, 8630, second owner, 1882 hours when I bought it in 1980, 7500 on it now. Repaired inj. pump years ago, leaking fuel into oil. Repaired hydraulic pump once, replaced it with new one several years ago. Hi-low planetary 2- speed failed at 5000 hours, replaced it with new. It has leaked engine oil at right rear of head for a number of years, but I've held off on removing the head... the blocks are known to crack around the sleeve area to the point the are not useable, and I'm scared of what I'll find!!! They are known for having the oil pump/cam gear fail, stopping the oil pump, and killing the engine. Deere has a procedure for checking the gear wear to see if it's getting near the failure point. Depending on serial #, they were known for the outer axle tapered-roller bearing turning on the axle shaft. If not worn too bad, the shaft could be ground down, and a special bearing with a smaller ID used. If this has been done to a machine, there should be a star (asterisk) stamped by hand on the outside end of the axle shaft. I had a neighbor break both rear axles about a year apart, but haven't heard of anyone else having that happen, so I don't know how common that is, but it sure would be annoying!!! It sure has been a good tractor for me, although I've sure heard horror stories of breakdowns others have had. I have always let mine warm up a few minutes before putting it under load, and let it idle a few minutes to cool before shutting it down. I generally throttle back to about 1900 RPM's, where it is quiter in the cab, and easier on the machine, and that may be part of the reason for it's longevity.
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