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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Re: 266 vs 568 plow difference?

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B A Star

10-30-2013 14:07:46

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   The 568 plow as compared to the 566 is quite a bit heavier in certain areas.  The 568 plow was available from 4 bottoms to 8 bottoms.  The 566 plow width of cut per bottom can be assembled to cut 14" or 16".  The 568 can be assembled to cut either 16" or 18".
   The hitch is a different design that is not as adjustable.  It is much stronger with a beam that goes rearward and attaches near the backbone.  One of the concerns with the 565/566 hitch was that it was too adjustable, thus operators attached it too low causing failures.  Main backbone could be either be 4 or 5 bottom with 1 bottom or 2 bottom extension.  The tail wheel was either controlled by a front mounted cylinder or a cylinder mounted at the rear, a 5 bottom probably had the cylinder at the front.  The 565/566 plows were introduced in 1963, the 568 in 1967.  An operators manual is available from the Floyd County Museum in Charles City, IA.

   Anyway you look at it, OLiver had the best plows and produced more than all other makes.

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Jim Stordahl

10-31-2013 07:12:52

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 Re: 266 vs 568 plow difference? in reply to B A Star, 10-30-2013 14:07:46  

You are a veritable fount of Oliver plow information! Thank you!

A friend found the plow sitting in a salvage yard waiting to be recycled. He knew I was looking for one and called me. I plan to bring it home and restore it to use, not parade quality, but practical use.

One more question.... What is the purpose of the long threaded bolt ajustment on the front of my 566? Is it simply to fine tune cutting width, or does it affect the angle of pull?

Most of my equipment is John Deere, but I love my Oliver plow! I also have an 880 Oliver so I have a warm spot for that green as well. I'm always on the lookout for a nice 1655 or 1755 to put on the haybine.

Thank you again for your information, it was most helpful!


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