Re: IH 666

Posted by John W. on December 07, 2000 at 06:51:38 from (63.162.252.102):

In Reply to: IH 666 posted by Randall on December 06, 2000 at 19:04:56:

The 666 will have a C291 gas engine in it, rated at 65 PTO HP. They were built from 1972-76. The 666/686 are very good tractors, and they seem to bring a premium price, at least here in Missouri. A gas model would probably bring less than a diesel.

706's are older (1963-67) and somewhat larger and heavier (probably about 1000lb heavier, on average.) 706's can usually be bought for less money than 666/686's, but are harder to find in good condition - probably due to the age difference. The 666 will have a single speed PTO (probably 540 RPM), and mechanical brakes and T/A. The 706 will have both the 540 and 1000 RPM PTO shafts, and hydraulic brakes and T/A. The 706 is rated about 75 PTO HP (actual number depends on engine.) The other main difference is the transmission. The 666 will have a 5F/1R, or 10F/2R with T/A. The 706 will have 8F/4R, or 16F/8R with T/A.

I have a '64 706D, and my dad has a '71 544G (basically a 4 cylinder version of the 656/666/686.) They are both very good machines. I would say the 544 is a little easier to live with as a "chore tractor" and the 706 is a little easier to live with as a "field tractor". The 666G might be a good compromise.

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