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  1. #21
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    Kubota BX2360

    Default Re: Telescoping PTO Shaft: Which end to tractor?

    Quote Originally Posted by Gordon Gould View Post
    Since they are marked logic says there is a reason. I wonder what it is.
    The logic for the marking may be to stop people asking which end connects to the tractor.

    Bruce

  2. #22
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    New Holland TT75

    Default Re: Telescoping PTO Shaft: Which end to tractor?

    [QUOTE=Kioti Tom;3288727]The King Kutter manual for their Standard Rotary Cutters in the section on cutting the PTO shafts.
    Pull apart PTO shaft and attach outer section to tractor PTO output shaft. NOTE: Be sure to pull on PTO shaft section to ensure yoke has locked into place.
    So here they say the outer half goes on the Tractor PTO.
    Quote Originally Posted by Kioti Tom View Post
    I think it depends on how the equipment MFR says it goes on their equipment.
    Tom
    I think you're right Tom - the manufacturer could be key to this I think. I also checked two other attachments in my local area, one had the inner shaft to the tractor, the other had the clearly marked 'tractor end' pointing to the slasher !

  3. #23
    Elite Member Gordon Gould's Avatar
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    Default Re: Telescoping PTO Shaft: Which end to tractor?

    Quote Originally Posted by bcp View Post
    The logic for the marking may be to stop people asking which end connects to the tractor.

    Bruce
    Maybe you are right. But looking at this thread it didn't work
    "If you're not making any mistakes then you're not doing anything"

    L3010DT, Farmi JL290 Winch, ATI Grapple, BearCat 5" Chipper, 6' Rear Blade,
    7' Sickle Bar, 5' Land Plane Grading Scraper, Dresser TD7G Dozer

  4. #24
    Elite Member oosik's Avatar
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    Kubota M6040

    Default Re: Telescoping PTO Shaft: Which end to tractor?

    I just checked with the LaMagdelena rep and he said as long as the yolks on both ends of the pto are the same then it makes no diff which end goes to the tractor or implement. That's good because I have three implements using pto and two are one way and, of course, the third is the other way.

  5. #25
    Veteran Member Lou66's Avatar
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    Default Re: Telescoping PTO Shaft: Which end to tractor?

    I was wondering why all of my equipment that the pto shafts female end was to the tractor end,, Well today I figured it out.. and imagine this if you will.. I was hooking up my cutter to the tractor and I pulled the pto drive apart so I could grease the male end,, when I went to put it back together,, my right hand was on the universe joint and the left hand was on the shaft of the female end,, if it would have been the other way around and I don’t mean my hands,, then I would have grease all over my hand/glove,, the good black graphite kind,, you don’t wash off you wear off,, I knew it was just a matter of time.. Lou
    "Life is good if beer is cold"

  6. #26
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    Default Re: Telescoping PTO Shaft: Which end to tractor?

    OK, I've spoken with the manufacturer of the Slasher - Southern Cross AG Machinery. Amidst a whole lot of industrial noise in the background, the guy was able to loudly confirm that:
    (a) it doesn't really matter which end
    (b) that he always puts the female end to the tractor for his own tractors
    (c) SXM slashers are released from the factory with the female end to the tractor
    (d) he's seen both ways and believes it's personal preference!

    Amazing the variety of responses to this. Mitch

  7. #27
    Gold Member
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    Tractors16-600hp Farm & Earthmoving Equip, Trucks etc.

    Default Re: Telescoping PTO Shaft: Which end to tractor?

    Another interesting thread - Sounds to me like the manufacturer's response is big on speculation rather than sound reasoning.

    Primarily the outer/female end is fitted to the tractor PTO due to torque transfer & the potential torsional force/shear loading - although it may not make a great deal of difference on a small tractor of say 35hp or less, or where there's a poorly adjusted slip clutch, or maybe a really sympathetic operator........ but up the ante to change the potential torque loadings of a tractor @ c.80hp+ combined with a siezed (or no) slip clutch & an operator who shock loads the PTO engagement or worse still the sudden siezure of a PTO uni joint & you're entering a whole new world of pain/drama close the operator station with the narrow end more likely to fail & fling around in the event of any failure (if the outer is at the implement end)..............

    There's also the question of harmonics/balance, with vibration & resonance being more readily introduced (contributing to premature shaft/uni wear & potential failure) if the outer/female larger shaft is not at the tractor PTO driven end.....consider this in relation to the lesser quality PTO shafts (with potentially inferior castings, thinner tube walls, poor welds, hot extrusions rather than hydroformed, non-serviceable uni's ...etc) now fitted on many cheaper implements.

    As one of the previous posters has said, the larger end always goes on the drive and the smaller end then goes on the driven end....true of virually every simple industrial/commercial drive shaft application.

    Unfortunately & for various reasons PTO shafts can/do fail, (& having witnessed the "results" on individuals of a few PTO failures over the years) personally I wouldn't advocate introducing any likelyhood of contributing to a premature failure by an incorrect PTO shaft installation.
    Last edited by MBTRAC; 04-30-2013 at 11:44 PM.

  8. #28
    Elite Member Gordon Gould's Avatar
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    Default Re: Telescoping PTO Shaft: Which end to tractor?

    Thank you MBTRAC
    "If you're not making any mistakes then you're not doing anything"

    L3010DT, Farmi JL290 Winch, ATI Grapple, BearCat 5" Chipper, 6' Rear Blade,
    7' Sickle Bar, 5' Land Plane Grading Scraper, Dresser TD7G Dozer

  9. #29
    Elite Member gwdixon's Avatar
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    Default Re: Telescoping PTO Shaft: Which end to tractor?

    Quote Originally Posted by Gordon Gould View Post
    Thank you MBTRAC
    Don't listen to him. He lives on the underside of the world. Everything is backwards down there.

  10. #30
    Super Star Member LD1's Avatar
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    Kubota MX5100

    Default Re: Telescoping PTO Shaft: Which end to tractor?

    Interesting thread. I have never thought about it before but then again, none of my PTO shafts can be switched as none of my implements have 1-3/8" 6-spline shafts.

    But I have yet to hear a valid (IMO) reason as to why the female goes on the tractor side. IMO, I dont think it would matter much.

    The one person mentioned about his tiller that "if" the shafts separated, and the male end were on the tractor, it would be all beat up. Well, what about a rotary cutter??? I am confident that I can disengage and stop my tractor PTO LONG before the inertia of the bushhog stops its half???????

    Perhaps the female end goes on the tractor side cause most of us refer to our tractors as "old girl" or something???
    ".........there is only one way to find out."
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