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d21 serial number breaks for larger bull gears
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ac45 View Drop Down
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Joined: 14 Sep 2009
Points: 395 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ac45 Quote  Post ReplyReply Direct Link To This Post Topic: d21 serial number breaks for larger bull gears
    Posted: 10 Jun 2011 at 2:32pm
I was told this was during the last year of production? any idea on a serial number?
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Brian Jasper co. Ia View Drop Down
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Joined: 11 Sep 2009
Location: Prairie City Ia
Points: 10508 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian Jasper co. Ia Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2011 at 3:31pm
I'd have to look to be sure, but I think they changed for series 3. Check the parts book.
"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Lonn View Drop Down
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Joined: 16 Sep 2009
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Points: 29817 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lonn Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2011 at 3:34pm
There is no Series III D21. I know there was a change but I'm not sure if it was at the start of the Series II or later. 
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Brian Jasper co. Ia View Drop Down
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Joined: 11 Sep 2009
Location: Prairie City Ia
Points: 10508 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian Jasper co. Ia Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2011 at 3:35pm
My bad, I was thinking D17...
"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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injpumpEd View Drop Down
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Joined: 13 Sep 2009
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Points: 5149 		Post Options Post Options   Thanks (0) Thanks(0)   Quote injpumpEd Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2011 at 3:48pm
look in agco parts books online. 
210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Lonn View Drop Down
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Location: Назарово,Russia
Points: 29817 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lonn Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2011 at 3:50pm
Now I have to look at the different D17's on my place. No Series III or IV but I think I remember telling Dad when I first brought my 58 home that his 61 looked wider in the finals. I forgot all about that. I'll have to take a look at my uncle's Series III too.
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DrAllis View Drop Down
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Points: 22307 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2011 at 7:05pm
Effective D21 sn 3596 the bull gears became 3 1/4 inches wide....prior gears were 2 3/4 inches wide. Looks to me like later on in 1967 the improvement (which was needed) was put into production.
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