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  1. #1
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    Default 1-1/2 8 spline pto shaft? Anyone heard of this?

    Got the new tires on the 1981 taishan 25 and took it for a good run around the dirt roads here and it was great. Now time to hook up a mower and realized that the pto shaft is 1.5" diameter 8 spline. I did a quicl search and found nothing on this size or adapters. Anyone have input on this?

  2. #2
    Super Member smstonypoint's Avatar
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    Default Re: 1-1/2 8 spline pto shaft? Anyone heard of this?



  3. #3
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    Default Re: 1-1/2 8 spline pto shaft? Anyone heard of this?

    Are you talking about the pto shaft coming out of the tractor or the pto shaft on the mower?

  4. #4
    Super Star Member LD1's Avatar
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    Default Re: 1-1/2 8 spline pto shaft? Anyone heard of this?

    Yea, just what is 8-spline?

    The mower stub coming out of the mower gearbox? The pto shaft itself that connects mower to tractor? Or tractor stub shaft?
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  5. #5
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    Default Re: 1-1/2 8 spline pto shaft? Anyone heard of this?

    Quote Originally Posted by LD1 View Post
    Yea, just what is 8-spline?

    The mower stub coming out of the mower gearbox? The pto shaft itself that connects mower to tractor? Or tractor stub shaft?
    Sorry, its the shaft coming out of the tractor. Spline to Spline it is 1.5"
    Attached Thumbnails Attached Thumbnails 1-1/2 8 spline pto shaft? Anyone heard of this?-20170824_071732-jpg  

  6. #6
    Elite Member Bob Rooks's Avatar
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    Default Re: 1-1/2 8 spline pto shaft? Anyone heard of this?

    I'm thinking it could be metric. Everything here is 1-3/8" six spline for 540/720 r/m and 1-3/4" twenty spline for 1,000 r/m. You MAY be able to find an adapter. Check automotive universal joint applications.
    There is also a 1-1/8" six spline. Are you measuring the outside or inside of the splines?
    Yuchai 306R dozer, Mustang 2040 skid steer, Mitsubishi MS035 Mini-Ex with four buckets and a rake, Trimble machine control GCR-2SM laser receivers.

  7. #7
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    Default Re: 1-1/2 8 spline pto shaft? Anyone heard of this?

    Its the outside of the splines. I only found this which i may have to cut and weld

  8. #8
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    Default Re: 1-1/2 8 spline pto shaft? Anyone heard of this?


  9. #9
    Super Star Member LD1's Avatar
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    Default Re: 1-1/2 8 spline pto shaft? Anyone heard of this?

    Quote Originally Posted by Bob Rooks View Post
    I'm thinking it could be metric. Everything here is 1-3/8" six spline for 540/720 r/m and 1-3/4" twenty spline for 1,000 r/m. You MAY be able to find an adapter. Check automotive universal joint applications.
    There is also a 1-1/8" six spline. Are you measuring the outside or inside of the splines?
    1/3/8 21 spline is another standard 1000 rpm pto.

    Not sure at what HP (or if that is even the reason some MFG change) they jump to the larger 1-3/4" 1000rpm
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  10. #10
    Elite Member Bob Rooks's Avatar
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    Default Re: 1-1/2 8 spline pto shaft? Anyone heard of this?

    Quote Originally Posted by LD1 View Post
    1/3/8 21 spline is another standard 1000 rpm pto.
    Not sure at what HP (or if that is even the reason some MFG change) they jump to the larger 1-3/4" 1000rpm
    I think it's 60 HP, if I remember correctly. 21 spline is kinda odd.
    Yuchai 306R dozer, Mustang 2040 skid steer, Mitsubishi MS035 Mini-Ex with four buckets and a rake, Trimble machine control GCR-2SM laser receivers.

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