John Deere 4030 with Quad Range (16 Speed) transmission plus the hydraulic system and dual speed PTO would have a clear advantage over the 686 in terms of features. Given the age of both condition might be the ultimate factor in which one to go with. I have a friend who would be highly interested in the 686 if you were to pass it up. Anyways, either if well maintained would make a good tractor. Further, the 4030 may have differential lock which was never offered on the 686. The HP difference is significant with the 4030 rated at 80 PTO HP and the 686 at 66 PTO HP. The 4030 catches some guff because it is less HP than the 4020 even though the model number is higher.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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