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JD A/B vs. JD 70/720/730

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Tony

07-18-2001 12:34:34




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I currently have a Farmall H and a 2N Ford and have just been bitten by the 2 cylinder bug. I have been researching JDs and have decided that I would like to get one that I can fix up. Problem is, I dont know what model to get. My question is; does anyone have any insight or opinions as to which model they would buy if they had to decide? If I buy a 70/720/730 model it would be diesel because the theory of operation of the diesel intrigues me. Obviously, I already know that there is a huge difference in price, power, age, modernness, etc between the number and letter series. I would just like to know from JD lovers which models they prefer.

By the way, does the diesel engine muffle the exhaust note?


Thanks,

Tony

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AJZ

07-20-2001 12:44:55




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 Re: JD A/B vs. JD 70/720/730 in reply to Tony, 07-18-2001 12:34:34  
We currently own an unstyled B (hate the thing), an unstyled A ( if you want a tractor to listen to stick a straight pipe on just the sound will draw a crowd),and a JD 70 the 70 is my favorite it doesnt have a muffled sound like you get with a 720 or 730 but it is an early model so its not a diesel (came out in 54 mine is 53) and no powersteering ( also came out in 54). If you want a diesel go with a big one like the R or 80.

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Duben

07-19-2001 20:51:17




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 Re: JD A/B vs. JD 70/720/730 in reply to Tony, 07-18-2001 12:34:34  
I have a G, 620 and 730 diesel. If I didn't have to do any work with it (except tractor pulling), the G is my favorite - it just looks and sounds the best of any tractor period - my opinion. If I were to work the tractor all day, the 730 is my choice. However, for small jobs or lighter jobs I use the 620 gas. If I could only keep one of them it would be the 730 diesel.

I love them all!



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Dave 2N

07-19-2001 18:38:47




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 Re: JD A/B vs. JD 70/720/730 in reply to Tony, 07-18-2001 12:34:34  
Tony-
My $.02 again.....
I dropped my Ford 2N at a show today (will take the 70 tomorrow) and there were a lot of tractors already there. But one stood out: a late model A that someone had done a great job with. It reinforced what I've always felt; that a late JD styled A is still the toughest looking JD and most typifies John Deere two cylinder tractors. My opinion again.....others will think differently, I'm sure.

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G Taylor

07-20-2001 16:25:41




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 Re: Re: JD A/B vs. JD 70/720/730 in reply to Dave 2N, 07-19-2001 18:38:47  
As fine as a late "A" is, the evolution into the 60 with live power everything is vastly superior in every respect.



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Dave 2N

07-19-2001 09:59:39




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 Re: JD A/B vs. JD 70/720/730 in reply to Tony, 07-18-2001 12:34:34  
Tony- The solution to your quandry is very simple; just buy one of each! Seriously, go to a show, look and listen and go with whatever floats your boat. I had a 1950 B that I sold a few years ago (kick me!) and now have a 1954 70 that was a real project to bring back but I like it. I personally like the styled letter series and the 40/50/60/70 series best but that's my preference. Look them over and make your choice. Are you going to use (work) it, work and play with it or just play with it and show it? It's up to you but you won't go wrong with any of them.

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Ron

07-19-2001 09:56:40




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 Re: JD A/B vs. JD 70/720/730 in reply to Tony, 07-18-2001 12:34:34  
Could you explain a bit more what you mean and want to know with regard to your question "Does the diesel engine muffle the exhaust note?"

Thanks



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Tony

07-19-2001 11:15:00




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 Re: Re: JD A/B vs. JD 70/720/730 in reply to Ron, 07-19-2001 09:56:40  
I have heard that the exhaust note is a bit muted sounding on the diesel models compared to the gas versions. For instance, I have heard that the exhaust on the gas models is more of a "pop" and the diesel models are a "thump".

Is that true?

I recently heard a model R diesel. The mass of the huge engine at idle had the whole tractor shaking and the sheetmetal vibrating significantly. Sounded more like a threshing machine than a tractor. I am assuming that the smaller motored models dont shake so much. Standing next to the thing, I was wondering how the paint managed to stay on the tractor for all these years.

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ron again

07-19-2001 14:59:59




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 Re: Re: Re: JD A/B vs. JD 70/720/730 in reply to Tony, 07-19-2001 11:15:00  
I ran several Rs as a young man. The exhaust is different on the diesel than on a gas expecially when it is running or idling with no load. But under a normal load they sound nearly the same as a gas JD. The shaking when engine is running but not pulling a load is normal for all JD 2 cyl diesels and I've never heard of one being hurt by that. They don't normally sit like that for very long anyway. They are mostly pulling their normal loads and when doing that there is no shaking felt.

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Richard

07-18-2001 15:44:56




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 Re: JD A/B vs. JD 70/720/730 in reply to Tony, 07-18-2001 12:34:34  
After reading your question, I see that you have done some research into the old Deere's. If you are just collecting, the older letter, and better yet the unstyled tractors attract interest. Although the numbered models have made it to collections, a far greater are still at work due to the more modern features they offer. One thing I like about the older numbered models is their lower rpm running engines. They have that tone which I believe earned the two cylinder Deere's the name Poppin Johny. The diesel does have a note of power that many value. A model D has a distinct tone and the Dubuque tractors have one all their own. To really decide, attend a show where most models are present. You will understand where I'm coming from.

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Bill

07-19-2001 07:23:11




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 Re: Re: JD A/B vs. JD 70/720/730 in reply to Richard, 07-18-2001 15:44:56  
Around where I live a good lookin G just about steals the show.Weather a styled or unstyled,a G looks good and sounds better than any other two cylinder exept for the D.And stock,a good running G will perform well also.Just my thoughts and good luck with whatever you decide.



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G Taylor

07-18-2001 12:49:35




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 Re: JD A/B vs. JD 70/720/730 in reply to Tony, 07-18-2001 12:34:34  
While the lettered series are fine old tractors they were intended for drawbar loads then & parade duty now. To have a three point hitch, live pto/hydraulics & power steering go with a numbered tractor with options.



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