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  1. #1
    Elite Member
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    2003 NH TN70A

    Default Draft Control on Kubota GrandL series

    Draft Control on kubota GrandL series

    I was looking at the GrandL series catalog today. I noticed that all of the GrandL series, from L3130 to the top of the line L5030 all have draft control as an option. Now, I am curious as to why draft control is an option on all the GrandL series? I thought draft control was used for ground engaging implements like a 2 bottom plow. Can a 32 HP tractor pull a ground engaging implement like a bottom plow? I thought bottom plows took a lot of power. Is 32 HP enough power???
    Bob

  2. #2
    Super Member texasjohn's Avatar
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    Kubota 5030HSTC

    Default Re: Draft Control on Kubota GrandL series

    Well, it depends... try this site for details.

  3. #3
    Veteran Member
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    Ford 4000; Ford 2000(both 3cyl.);JD40; 2004 Kubota L4300; 2006 Kubota B7610; new 2007 Kubota MX5000

    Default Re: Draft Control on Kubota GrandL series

    Yes, 32HP is enough, Doc Bob, but a few other factors have to be right as well. The weight has to be there and so do R1 tires and good gearing.

    As I recall the old JD40 with a 100 cu. in. 2 cylinder gas engine of around 25HP was rated at 2-14s. It didn't pull 'em very fast though. The small Fords would handle a 2-bottom plow as well. My 3 cylinder Ford 2000 does a fair job with 2 bottoms. It's biggest problem is lack of weight on the rear tires and a low gear that's a bit fast....its 35HP is plenty, however. I think with good gearing and filled rears, an 8N or 2N would do OK as well. Keep in mind, these are all 2WD tractors.

    A Grand L, regardless of HP, has the weight (especially with the rear tires filled) and the gearing. Should be able to handle 2 bottoms with ease. I'd expect the L4330s and above to be capable of 3 bottoms. 15HP per bottom is a conservative rule of thumb...if everthing else is right. A B3030 wouldn't be a good choice, however.
    Bob

  4. #4
    Elite Member
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    Default Re: Draft Control on Kubota GrandL series

    </font><font color="blue" class="small">( Well, it depends... try this site for details. )</font>

    Nice chart. I am struggling with understanding it and applying it. Any help???
    Bob

  5. #5
    Elite Member
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    Default Re: Draft Control on Kubota GrandL series

    I tried a sample calculation.

    Moldboard
    4.5 mph x 2.1 x 800 / 375=20.16 HP for PTO.

    So, one bottom plow would take 20 PTO HP?
    Bob

    PS Why is sandy soil 2.1 and form soil 1.5? I woulld have thought it would have been the other way around?

  6. #6
    Gold Member
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    Central Lower Michigan
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    Kubota L3430

    Default Re: Draft Control on Kubota GrandL series

    I have a kubota L3430 and a King Kutter Two Bottom 14" Plow. I can pull it no problem in low range, four wheel drive at about 3 - 4 mph.

    ksmmoto

  7. #7
    Elite Member
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    Default Re: Draft Control on Kubota GrandL series

    </font><font color="blue" class="small">( I have a kubota L3430 and a King Kutter Two Bottom 14" Plow. I can pull it no problem in low range, four wheel drive at about 3 - 4 mph.

    ksmmoto )</font>

    Nice to hear from someone who is actaully using it! Do you have draft control?
    Bob

  8. #8
    Gold Member
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    Central Lower Michigan
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    Kubota L3430

    Default Re: Draft Control on Kubota GrandL series

    No, I don't have draft control. I haven't plowed a very large area yet, so I'm not sure if it is really needed.

    In fact, I believe having HST will help with the plowing as I can letup slightly if the plow hits a hard spot and the tractor will keep pulling strong.

    I know most people will say that gear is best for field work and they may well be right for large fields. But I may only do three acres at the most at one time.

    ksmmoto

  9. #9
    Elite Member
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    Default Re: Draft Control on Kubota GrandL series

    </font><font color="blue" class="small">( I have a kubota L3430 and a King Kutter Two Bottom 14" Plow. I can pull it no problem in low range, four wheel drive at about 3 - 4 mph.

    ksmmoto )</font>

    What kind of soil? Virgin? Sand? Clay?
    Bob

  10. #10
    Veteran Member Oleozz's Avatar
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    Pa.
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    International 1066 with Year Round Cab, Kioti DK 45S with Cab, 451 Loader

    Default Re: Draft Control on Kubota GrandL series

    I have been pulling a 2 bt plow with a 45 hp tractor and it has to work but I am plowing ground that hasn't been turned over in 25 years and the sod is thick and heavy. I think soil conditions mean a lot and also how you have the plow set up. My tractor has draft control as a standard feature and that's one of the reasons I bought it.

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