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 - Repairing A Massey Harris 22 - by John Reeves. I have just given this old girl (boy?) a replacement RH rear axle. I was lucky enough to find an axle in good shape at a reasonable price - also a replacement for the right rear brake assembly which was
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