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  1. #1
    New Member ajb4266's Avatar
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    Massey ferguson 1433v

    Default PTO rpm speed/tractor rpms

    I have a Massey 1433v which I will be running a firewood processor with. The processor requires a maximum 400 rpms at the pto. My tach only shows a setting for 540, if anyone has a system of measuring pto speed at various tractor rpms I would appreciate the help.



    Massey 1433v
    6' puma snowblower
    fransgard forestry winch
    japa 370 tr firewood processor

  2. #2
    Gold Member
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    TYM T353 HST / TX3500 Loader

    Default Re: PTO rpm speed/tractor rpms

    Quote Originally Posted by ajb4266 View Post
    I have a Massey 1433v which I will be running a firewood processor with. The processor requires a maximum 400 rpms at the pto. My tach only shows a setting for 540, if anyone has a system of measuring pto speed at various tractor rpms I would appreciate the help.



    Massey 1433v
    6' puma snowblower
    fransgard forestry winch
    japa 370 tr firewood processor
    OK - If it's rated at a max of 400 RPM's, I'd stick with 350.

    350 is 65% of 540, so If I figured it right - Your 540 RPM rated engine speed, times .65 ought to give you an operating engine speed for 350 RPM at the PTO...

    I never claimed to be a Math wizard though...

    Hope that helps -

    Lunk
    TYM T353 HST w/TX3500 Loader / Faver SCX526LT Grapple / Woods BB60X Rotary Mower / Bush Hog SBX65 Box-Blade

  3. #3
    Elite Member sandman2234's Avatar
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    JD2555 and a few Allis Chalmers

    Default Re: PTO rpm speed/tractor rpms

    Pto speed varies with the engine rpm, but I don't know what the minimum is for your tractor. Maybe Massey might be able to tell you what it is doing at each step in the engine rpm, or the speed at idle. 540 is just where most implements (that are 540 rated) preform the best. I usually bush hog at a lessor speed to prevent destroying something when I find unexpected items.
    David from jax
    A serious accident is one that money won't fix.

  4. #4
    Silver Member tatra805's Avatar
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    Iseki TL1900FD

    Default Re: PTO rpm speed/tractor rpms

    Go buy a cheap bicycle computer and program it for 26" wheels and km/h readout.

    Mount the magnet close to the axle casing on the pto shaft using a hose clamp and fix the sensor on the axle casing.

    You will read your pto rpm with 1 decimal. 540 being 54.0 km/h
    not accurate to the rpm but close enough.

    did this this week and it worked great taking out the mystery of my 4 speed pto speed selector.

    my 2 cents


    edit: if you have a comp as i have you will even find out how many calories you burnt, well in this case; how many calories you did not burn wearing flashy ladypants and riding a 2 wheeler.
    makes me feel better.
    _____________________________________________

    Iseki TL1900FD
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  5. #5
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    Mitsubishi MT3201D

    Default Re: PTO rpm speed/tractor rpms

    Quote Originally Posted by tatra805 View Post
    Go buy a cheap bicycle computer and program it for 26" wheels and km/h readout.

    Mount the magnet close to the axle casing on the pto shaft using a hose clamp and fix the sensor on the axle casing.

    You will read your pto rpm with 1 decimal. 540 being 54.0 km/h
    not accurate to the rpm but close enough.

    did this this week and it worked great taking out the mystery of my 4 speed pto speed selector.

    my 2 cents


    edit: if you have a comp as i have you will even find out how many calories you burnt, well in this case; how many calories you did not burn wearing flashy ladypants and riding a 2 wheeler.
    makes me feel better.
    Boy is that ironic! I have a Mitsubishi with a 4 speed PTO and did the same thing just two days ago. I even started a thread about it here:PTO RPM Indicator

  6. #6
    Super Star Member LD1's Avatar
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    Kubota l3400

    Default Re: PTO rpm speed/tractor rpms

    Quote Originally Posted by Lunk View Post
    OK - If it's rated at a max of 400 RPM's, I'd stick with 350.

    350 is 65% of 540, so If I figured it right - Your 540 RPM rated engine speed, times .65 ought to give you an operating engine speed for 350 RPM at the PTO...

    I never claimed to be a Math wizard though...

    Hope that helps -

    Lunk

    Best advice right here.

    The PTO and tractor RPM are directally proportional. Tell us what RPM you engine runs for 540 and we will be able to tell you how many rpm's to run the PTO at 350 or 400
    ".........there is only one way to find out."
    "Ok, hold my beer and watch this.........."


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  7. #7
    Super Star Member J_J's Avatar
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    Default Re: PTO rpm speed/tractor rpms

    I have one of those Stewart direct measuring indicators. You touch it to a rotating shaft, and it reads out the rpm. There is also a Photo readout device , that when aimed at a white spot, it will read out the rpm. There is also a magnetic sensor to read the pulses from a rotating magnet.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  8. #8
    Super Star Member J_J's Avatar
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    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: PTO rpm speed/tractor rpms

    Quote Originally Posted by LD1 View Post
    Best advice right here.

    The PTO and tractor RPM are directally proportional. Tell us what RPM you engine runs for 540 and we will be able to tell you how many rpm's to run the PTO at 350 or 400
    Does it work for two speed, PTO's?
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  9. #9
    Super Star Member LD1's Avatar
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    Kubota l3400

    Default Re: PTO rpm speed/tractor rpms

    Quote Originally Posted by J_J View Post
    Does it work for two speed, PTO's?
    Yes it works for two speed PTO's, as long as you have a baseline.
    You just need to know what the pto speed is and @ what rated RPM

    Example: PTO on Low speed 540@2300rpm*(Not actual numbers)
    PTO on High speed 1000@2300rpm*(All tractors are different)
    LOW speed
    540/2300=.235
    that tells us on low speed that the PTO is turning 23.5% of engine speed.
    You can either figure What tractor rpm it takes to get a given PTO speed or you can figure what the pto speed is @ a given tractor RPM.
    @2000rpm PTO speed would be 470 (2000 x .235)
    If you want say 400rpm PTO (400/.235)=1700rpm

    HIGH speed
    1000/2300=.435
    So @ 2000rpm tractor speed PTO would be (2000 x .435)= 870 PTO rpm
    If you wanted 750 pto rpm the tractor would need to run (750/.435)= 1725rpm

    All you need to know is what RPM the PTO is and @ what RPM it makes that speed and you can figure the RPM at any other point in the operating range.
    ".........there is only one way to find out."
    "Ok, hold my beer and watch this.........."


    Ford 5500 Backhoe
    Kubota L3400GST W/LA463 FEL
    2005 Dodge 3500 4x4 Diesel
    8N Rebuilt and restored
    Bushhog 306
    3 Homemade wood hauling trailers
    Dolmar 6400 84cc ported
    Sachs-Dolmar 120SI Ported
    (4) Sachs-Dolmar 116SI Ported
    Dolmar PS540
    Sachs-Dolmar 115i
    Sachs-Dolmar 117
    Sachs-Dolmar 112

  10. #10
    New Member ajb4266's Avatar
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    Massey ferguson 1433v

    Default Re: PTO rpm speed/tractor rpms

    thank you to all for the help.With some simple math I do believe that I can solve my problem.

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