Oliver oneway disc

Here's what it looks like
 

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Hand crank was designed as a depth stop so that when hyd cylinder was used to raise/lower disk the crank assured that disk lowered to same depth every time disks were cycled up/down. At least that is the method that JD disk tillers that I'm acquainted with operated.
I've done 500 acres with the schaffer worked great
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Dad tells of one Grandpa had with some thing like 35 or so inch discs on it. He said the first set was good and he used it a lot with the Cat for tillage. Then he replaced them with a second set and they broke and didn'5t hold up well. Ill have to ask him what happened to it. Since everything else is still around from the beginning of the Cat for equipment . The old 4 bottom Oliver plow and the JD disc and JD drags are all here. So Would like to know what happened to that.
 
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We had a Schafer one way that was 15 or 16 feet long. I pulled it many a mile. The hand crank on the front furrow wheel was used to adjust it down when you made the first round on the outside edges of the field. You put the disks in the ground to the depth you wanted with cylinder, then cranked the wheel up so the front end was level with the rest of the disks. When you got the first round done, you dropped the wheel off in the furrow. Now you had to raise it up the depth of the furrow. If you have it adjusted correctly, it will fill the furrow in and you can't tell where it was. Ours had a hitch tongue on the furrow wheel to tow it down the road. Because these were not made to turn right.
 
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