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John Deere Tractors Discussion Forum
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Re: Two cylinder tractor size

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Author  [Modern View]

04-15-2014 19:32:06

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Sorry dude but you are mathematically challenged.
The green dash 820 listed in the Nebraska tests.Had less power but was slightly better on fuel than the black dash 820/830/840.
4.21 US gallons per hour making 72.82 pulley HP and 67.15 drawbar HP. 5898lbs drawbar pull
You can't find a decent 80/820/830 around here for less than $10,000 each.

A good old classic 4455 which will pull the pants off a pair of jacklegged 830's hitched together. On less fuel b.t.w.

Test Date: April 1, 1989 - May 1, 1979

Type: Diesel Powershift 4WD

PTO power (max): 146.86 hp [109.5 kW]

PTO fuel use (max): 8.1 gal/hour [30.7 l/hour]

PTO power (rated engine speed): 141.60 hp [105.6 kW]

PTO fuel use (engine speed): 8.4 gal/hour [31.8 l/hour]

Drawbar power (max): 122.53 hp [91.4 kW]

Drawbar fuel use (max): 8.4 gal/hour [31.8 l/hour]

Drawbar pull (max): 17,446 lbs [7913 kg]

Max pull gear: 3

Test report: PDF file

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04-15-2014 20:17:52

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 Re: Two cylinder tractor size in reply to buickanddeere, 04-15-2014 19:32:06  
I have to agree with Buick. I have an 830 and a JD 6230 4-WD (75 pto hp) for my 80 acre hobby farm. I can pull a 4-16 plow with the 6230 in any condition, but the 830 can't always pull it in very dry or wet conditions because of traction. But the 830 does use a lot less fuel to do the same work. The 830 used to be my plow tractor but now I just use it to plow a few acres on a nice day. Hard to go back to sitting out in the weather when you have a cab tractor with air. Get a 4450 or 4455 with a cab and forget the 2-cylinder if your doing 200 acres. Al

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04-15-2014 19:58:02

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 Re: Two cylinder tractor size in reply to buickanddeere, 04-15-2014 19:32:06  
Buick, do you have access to the Nebraska test for the R Jd? Thanks

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04-15-2014 19:54:05

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 Re: Two cylinder tractor size in reply to buickanddeere, 04-15-2014 19:32:06  
Buick, remember that tandem 830's would more than double the traction, fuel efficiency, & pounds of pull than one 830. This is a well known fact, & true of any tandem hitched tractor. I doubt it would pull 17,000 pounds but in a 100 acre challenge it would come up close, if not ahead, due to traction. I have watched single, double, & triple hitched 830's in the field. I've watched a 7520 with a 830 pusher on it in the field. Also, I was talking about a 2 wheel drive naturally aspirated 100 hp tractor, because the original post was on 2 cyls, because I compared it to a 4020, & because I'm not aware of any front-assist ones you can buy in usable condition for 10,000$. If hp is superior to cubic inches please explain to me why we don't have 400ci in a semi with 500hp, (durability aside)? We have 1200ci instead, with 450hp. One could indeed gear the truck to do the work and at the same rate but it's not practical. And please show me this $10,000 front wheel assist 55 series 6000hr tractor you've found LOL

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04-15-2014 20:10:18

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 Re: Two cylinder tractor size in reply to Gtx1967, 04-15-2014 19:54:05  
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I don't where you are going to find two 80/820/830 for under $12,000-$15,000 each. Then the time and money to hack them up into a tandem hitch . You are well into paying for a 4455M4WD by that point. The 4455 has diff lock, sound guard body , high flow hydrualics, 1000rpm pto, three point hitch and air conditioning. Add those to your 830 tandem hitch for less than the price of a 4455.
Care to guess that the price difference would be on a tandem 830 hitch at an auction vs a 4455M4WD at your retirement?
The M4WD was used as a comparison as it's driving on two axles like the jackleg tandem 830 hitch. You were watching a strain gauge and mph indicator? Or watching the tractors from the side of the field? I'll take science over a seat of the pants dyno.
Where pray tell did 400cu" and 500HP come from ??? The 4455 has a 466 cu" engine making less than 150 net Hp.
The 450HP engine with 1200 cu" you like Is being pushed 119% harder than the 466 making 147pto Hp.

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04-15-2014 21:02:46

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 Re: Two cylinder tractor size in reply to buickanddeere, 04-15-2014 20:10:18  
The M&W dyno shows only the engines output, not the whole machines ability to perform useful work. When you stand & watch the 830 pull the same load in the same field at the same rate as the 4020, I don't care what the dyno says cuz it doesn't matter. You have to put it to the ground & burn the same fuel. Perhaps we should remove your turbo & find a N.A. 6 cyl Diesel that can do the work of an 830 on the same fuel, apples to apples. It don't exist, at least not a Deere .

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04-15-2014 20:53:53

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 Re: Two cylinder tractor size in reply to buickanddeere, 04-15-2014 20:10:18  
The 400ci @ 500 hp is running all over Tarnation, mostly at classic car shows & drag strips. V-8 gas/ethanol. The 1200ci @ 400 hp is in reference to a semi truck engine, which I was also with the 500hp 400ci v-8 gas. Making a point that hp is not always the same, torque matters. And on your note about which is being pushed, using your 830's & your 4455, they have over 900ci, your 4455 has only 466. The output is the same.

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04-15-2014 20:47:04

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 Re: Two cylinder tractor size in reply to buickanddeere, 04-15-2014 20:10:18  
To Buick, and you, please go back & read my tandem hitch post. I said to tandem two R's, which you can buy several a day for 3-5,000. NOT two 830's. I also said in comparison to a 2wd ,100hp tractor. It's a fact that the 2 R's combined can only burn just over 4 gph at rated load. I don't know what a 4230 would burn, or a 4020, loaded to 100hp, but I'd bet it's more than 8 or 9 gph. And nobody can tell me that a tandem R with duals all around has less traction than even buicks 4455 front-
assist. Again I said a 2wd single 100hp tractor.

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