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  1. #1
    Veteran Member
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    Nov 2002
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    1,278
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    West Sunbury ,Pa.
    Tractor
    L3130 hst

    Default PTO RPM??

    As I understand it , most pto implements a made to be driven @540 rpm (given engine speed) Why do some tractors come with a dual rpm rating ? (540and 1000 ) What sort of implement is run at the higher rating ? Is my newbieness showing [img]/forums/images/graemlins/smile.gif[/img] John

  2. #2
    Platinum Member
    Join Date
    Jul 2000
    Posts
    951
    Location
    Sierra Foothills, Northern California
    Tractor
    Kubota B7300; JD LX233

    Default Re: PTO RPM??

    On my tractor the RPM is different depending on which PTO you are using. The rear PTO runs at 540 RPM and the middle PTO runs at the faster speed (never used the middle PTO, but one of these days I'll get a belly finish mower and that runs at the faster speed).

    Hey, I show newbie type lack of knowlege all the time. And I've had my tractor for six years now [img]/forums/images/graemlins/grin.gif[/img].

  3. #3
    New Member
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    Sep 2005
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    Default Re: PTO RPM??

    I myself am in the pre-newbie egg stage myself, but I can point you at an interesting thread that discusses this issue at some length.

    Adding a 2-speed PTO

  4. #4
    Gold Member
    Join Date
    Dec 2001
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    364
    Location
    Woodford, VA
    Tractor
    NH TC33DA HST

    Default Re: PTO RPM??

    My ol' Pappy used to say "There's no such thing as a dumb question if you don't know the answer." [img]/forums/images/graemlins/smirk.gif[/img] That's what makes this site so great -- you can ask those questions and get straight answers (most of the time). [img]/forums/images/graemlins/grin.gif[/img]

    Chris is correct. Most 3-point hitch implements that are PTO powered are designed to operate best at 540 RPM PTO speed, while belly-mount mowers are usually designed to operate best at 1000 RPM.


  5. #5
    Veteran Member
    Join Date
    Nov 2002
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    1,278
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    West Sunbury ,Pa.
    Tractor
    L3130 hst

    Default Re: PTO RPM??

    Thanks for the response ! So basically , if I'm only intend to run a brush hog (not a finish mower ) a pto that runs at 540 rpm is all I'll need ? the 1000 rpm is for things like rear mounted finish mowers , Right ? Please say YES . This tractor stuff is making me nuts [img]/forums/images/graemlins/smile.gif[/img] I did over 20 years in the AF working on aircraft . So naturally I thought .. "tractors .... they can't all that hard to figure out [img]/forums/images/graemlins/smile.gif[/img] "
    Heck, I'm still trying to figure my best choice for a new tractor . I'm pretty much set on a Kioti Dk 35 . But the Century also gets my attention . It seems the more I research the dumber I get [img]/forums/images/graemlins/smile.gif[/img] John McCloskey

  6. #6
    Super Member Inspector507's Avatar
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    Mar 2002
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    5,845
    Location
    Central Ohio

    Default Re: PTO RPM??

    Most of the RFM's I'm familair with run at 540 Max.

  7. #7
    New Member
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    Sep 2005
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    Default Re: PTO RPM??

    Hi,

    When I was shopping last year I asked the kubota guy about the two speed rear PTOs I saw on some model...he said that in Japan or elsewhere they must have some implements that run at higher speed [on the back] than we do.

    This is a separate issue from the Mid-PTO, which runs at more than 540 rpm [forget the speed at the moment].

    Most, if not all, of the rear mounted implements you will find in this country are designed to run at 540 PTO rpm for rated speed of the implement. At least that is my understanding, but it is a big country! [img]/forums/images/graemlins/smile.gif[/img]

    The PTO will turn at 540 RPM at only one engine speed, since as mentioned in a previous post, there is a gear connection between the engine and the rear PTO output shaft.

    In the case of my B2910 this is something like 2,600 engine RPM. In the case of the smaller bx units, it is something like 3,200 RPM. Same thing holds true for other colors.

    I think this may have all been said up above...hummm....so why am I saying it again here??? Got me... [img]/forums/images/graemlins/blush.gif[/img]

  8. #8
    Old Timer Soundguy's Avatar
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    Mar 2002
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    Central florida
    Tractor
    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: PTO RPM??

    The rear pto standard is 540 rpm... Some tractors have a 2 or 3 speed pto.. for instance my yanmar 1700 has 540.. 760.. and 1040

    I've heard the the other settings are for specific items like a yanmar tiller that might need a higher speed, etc.

    Thinking about ti too, pto speed will be a product of engine speed and vary as such ( on a geared tractor ).. so if you wanted a lower engine rpm.. but still needed 540 pto.. like for a seeder.. something with low power requirements.. you could set the pto for your second speed.. but run less rpm on the tach.. and ground speed and still make it only 540 on the rear... follow?

    Soundguy

  9. #9
    Veteran Member
    Join Date
    Nov 2002
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    1,278
    Location
    West Sunbury ,Pa.
    Tractor
    L3130 hst

    Default Re: PTO RPM??

    Got it. Thanks ,John

  10. #10
    Elite Member rockyridgefarm's Avatar
    Join Date
    Mar 2002
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    4,461
    Location
    Road 4310
    Tractor
    Deere 4310 HST MFWD

    Default Re: PTO RPM??

    Rear PTO = 540 rpm (ALL rear attachments)
    Mid PTO = 2000 rpm (belly mower, etc)
    Rear 1000 rpm = yanmar tillers

    run a rear mower at 1000rpm and amazing things can happen [img]/forums/images/graemlins/ooo.gif[/img]

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