HP tradoff on Hydros: John Deere Review  -- John Deere Tractors Discussion Forum and Review HP tradoff on Hydros: John Deere Review -- John Deere Tractors Discussion Forum

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 12-12-2003, 20:21 Post: 70986
wildbill



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 HP tradoff on Hydros

Here I am again. I test drove a JD4310 eHydro today and realy liked it. I have narrowed down my new tractor to either a Kubota 3430 hydro or a JD 4310 eHydro. But, the HP spec on the Kubota is higher only slightly. Is it worth the extra money to go with a JD4410 for the extra HP or not. Anybody have experience with this issue?






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 12-12-2003, 20:26 Post: 70988
kwschumm



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I faced this question when shopping. The 4410 is a great machine but you pay dearly for the extra 3 hp, another $1500. Torque is where it's at and the 4410 has more torque than any of the other 10-series machines except (I think) the 4610. But I still found it hard to justify the extra $1500. So I went with the 4310 and have yet to wish for more power.






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 12-12-2003, 20:36 Post: 70990
wildbill



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I agree. I was shocked at the price differential between the two models for just 3 PH. I know the the JD uses a Yanmar engine which is very good and the Kubota uses their own. How do these compare torque wise?






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 12-12-2003, 20:56 Post: 70992
kwschumm



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It's kinda hard to compare torque figures because the Kubota brochure doesn't list them.

As far as JD goes, the 4310 has 73.10 foot-lbs and the 4410 has 81.0 foot-lbs both at 2600 rpm. I was wrong - the 4410 has more torque than any other 10-series tractor except the 4710. Still, for the extra $1500 you could buy more implements, always a good thing Smile






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 12-12-2003, 22:17 Post: 71000
Chief



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Kubota measures horsepower at a different rpm and does NOT advertise torque and for good reason.

Using the formula for torque: torque = horsepower x 5252/rpm

Kubota L3430 35.1 hp 35.1 x 5252/2700= 68.3 ft./lbs. torque.

John Deere is all over the map when it comes to publishing technical specifications. Ken has already posted the torque output posted on Stoneham's web site.

If you go by the above formula the 4310 torque figures out to 65 ft./lbs. torque. The John Deere owner's manual states 57.9 ft. lbs. torque.

Bear in mind that the L3430 and 4310 comparison is NOT a valid apples to apples comparison. The 4410 IS and carrys the bragging rights for torque if that means anything. Had I not gotten the VERY good price I paid on mine I surely would have purchased the 4310. I find it hard to justify the $1,500 price tag for 3 hp and about 9% more torque.

The fair and valid comparison for the 4310 is the L3130. In this comparison the 4310 leads in hp & torque.

Kubota uses the comparisons like the L3430 vs JD 4310 to present data in an advantageous light. If you move all the Grand L comparisons to the JD 4000 Ten Series down 1 tractor in size; the comparisons are most accurate and valid and tip in John Deere's favor. Both make a great tractor. Just remember to compare apples to apples.

This should make things clear as mud now? Right? Wink yeah right






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 12-12-2003, 22:26 Post: 71002
kwschumm



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I've never heard of Stoneham's web site. I got those numbers straight from the JD 10-series brochure.






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 12-12-2003, 22:55 Post: 71008
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 HP tradoff on Hydros

Ken, that was one of JD's famous misprints, about the 4410 having more torque than the 4510 and 4610.

Below is torque values at 1,700 RPMs

4510...92 lb-ft
4610...95 lb-ft
4710...108 lb-ft






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 12-12-2003, 22:59 Post: 71010
Chief



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test






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 12-12-2003, 23:04 Post: 71012
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http://www.stonehams.com/midcut.html






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 12-12-2003, 23:04 Post: 71013
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Billy, thanks for the correction. Where did you get those numbers? Is 1700 the correct rated rpm? The books all show 2600.






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Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

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Art White 3 | Billy 1 | Chief 12 | DennisCTB 1 | DRankin 3 | harvey 1 | kubotaguy 1 | kwschumm 5 | Peters 1 | TomG 2 | wildbill 2 |




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