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| Far as I can tell from op manuals and parts book, the plate and plateless planters were made throughout the production time of the 7000/7100. I've never seen a plate type in the flesh, only plateless. So plate type doesn't indicate an earlier style. You can solve the changes more easily by finding a parts catalog and by comparing the parts on the two styles of row units. Shoup and Sloan Express have many of the parts, as does Kinze. Others have said in their area, plateless types are rare.
RK products is reputed to have the best parts for gauge wheel arms and tailpiece pivots that make a better repair and last longer than those from Deere and Shoup.
One detail I do know changed with age was the type of chain and sprockets in the transmission. Earlier planters used 2040 chain and 2040 sprockets with wide teeth between notches, later planters used 40 chain and sprockets. Older manuals show the fewer teeth counts.
Gerald J.
Edited by Gerald J. 4/25/2013 22:05
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old style JD7000 row unit ?
