The 686 is nearly identical to the 666 before it. They just renamed it 686 when the 86 series came along in 1976. I don't see much of a comparison with a 656 other than they were both red. One change did occur in 1979 when the engine went from 312 cid to 310 cid. The info I see on the Nebraska tests show the Deere to have both a 1000 rpm PTO and a 540 whereas the 686 just has 540. Comparing the bare tractors the Deere weighs about 1000 lbs more than the 686. Personally, the TA would turn me off but there are other things to look at.
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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