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  1. #1
    Silver Member
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    Default How to Determine PTO RPM\'s ?

    Hello All !

    I have a B2150 and an Allied/Buhler snowthrower. It's designed to run at 540 RPM's. But How do I know when I hit that RPM speed on the rear PTO ?

    What RPM's should the tractor engine be turning to hit this PTO speed ?

    Thanks. Tim

  2. #2
    Super Member ronjhall's Avatar
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    SE Michigan, TX when its cold in MI.
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    Default Re: How to Determine PTO RPM\'s ?

    I am not fimilar with a B2150.
    Does tractor have a Tachometer? If it does, there should be a line around 2000 to 2800 rpms that indicates PTO 540 RPM's.

  3. #3
    Platinum Member tomnky's Avatar
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    Berea,Kentucky
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    Kubota BX2200

    Default Re: How to Determine PTO RPM\'s ?

    Yes it has a mark on the tachometer for 540 Ron. [img]/forums/images/graemlins/grin.gif[/img]

  4. #4
    Silver Member
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    Default Re: How to Determine PTO RPM\'s ?

    Hmmmm....

    Well don't I feel stupid !

    When I get home today, I'll have to take a closer look.

    Never noticed, but then again, never really looked !

    Thanks !

    Tim

  5. #5
    Silver Member caylor's Avatar
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    Upshur County, Texas
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    Kubota L3130 w/513 FEL Quick Attach, Kubota RTV900

    Default Re: How to Determine PTO RPM\'s ?

    Remember, the only stupid question is the question not asked. Or as my old man used to say, "There are no stupid questions, but there are a **** of alot of stupid answers." [img]/forums/images/graemlins/tongue.gif[/img]

  6. #6
    Elite Member SkyPup's Avatar
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    North Central, Florida
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    Kubota L-39 GST TLB, Kubota L3130GST, Massey 1030 HST, Kubota ZD-21 ProDecK, Two Euro VW TDIs

    Default Re: How to Determine PTO RPM\'s ?

    Well here is a good answer -> our kubota L-3130 has a live PTO rpm tachometer specifically monitoring the PTO rpms from 0-540 rpms in real-time, not some spot on the engine RPM tachometer where the PTO should be running at 540rpms.

  7. #7
    Epic Contributor Soundguy's Avatar
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    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: How to Determine PTO RPM\'s ?

    There may just be a line.. or it could say 540 or 538.. or could have a graphic of a small gear spinning.

    Soundguy

  8. #8
    Silver Member
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    Default Re: How to Determine PTO RPM\'s ?

    When I got home last night, I went over to the orange beast and looked at the dash.

    YUP ! Sure enough, there "IS" a line at about 2500 RPM that says "PTO 540". I've had the tractor for almost 7 years and never really paid attention.

    Thanks again....

    Tim

  9. #9
    Silver Member
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    Default Re: How to Determine PTO RPM\'s ?

    Now... as a follow up question.

    Can I run the engine at a "Higher" RPM and exceed the PTO RPM's of 540 without damaging my snowthrower?

    I was running it at about 2800-3000 since it would throw the snow farther at the higher speed.

    I really don't "think" it would hurt it, but would like some input from more educated operators.

    Thanks, Tim


  10. #10
    Super Member Bob_Skurka's Avatar
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    Default Re: How to Determine PTO RPM\'s ?


    <font color="blue">
    Can I run the engine at a "Higher" RPM and exceed the PTO RPM's of 540 without damaging my snowthrower?

    I was running it at about 2800-3000 since it would throw the snow farther at the higher speed.
    </font>


    TimP, you've had the tractor for 7 years, and you've been running the snowblower at 2800rpm, which is something over the 540 PTO rpm all this time. I think you answered your own question.

    But consider the gearing. It takes 2500 engine RPM to get the PTO to run at 540, so there is ROUGHLY a 5 to 1 gear down. Running at 3000 engine RPM is going to put the PTO RPM at roughly 600? I suspect there is enough safetly factor engineered into the gear box of the snowblower to handle that.


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