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  1. #1

    Join Date
    May 2004
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    38
    Location
    Carnation, WA
    Tractor
    Kubota L4330 HST 4WD

    Default PTO Hydaulic pump for HI-flow attachments

    Does anyone know if there are PTO driven hydraulic pumps that will support hi-flow attachments? I've seen a number of skid-steer front attachments (flail mowers, etc) but they all require more flow than my 8.5 GPM kubota has to offer.
    Any info or experiences you've had in this area would be appreciated. Thanks.

  2. #2
    Epic Contributor Soundguy's Avatar
    Join Date
    Mar 2002
    Posts
    49,136
    Location
    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 Hydaulic pump for HI-flow attachments

    Search places like surplus center.. etc.. I'm guessing if you look hard enough you can find a high flow rate hydro pump. Perhaps even call a hyds shop.. just feel around to see what is out there..

    Soundguy

  3. #3
    Silver Member
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    Jul 2003
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    230

    Default Re: PTO Hydaulic pump for HI-flow attachments


  4. #4
    Super Member Highbeam's Avatar
    Join Date
    Feb 2005
    Posts
    5,039
    Location
    South Puget Sound, WA
    Tractor
    Kioti CK30HST

    Default Re: PTO Hydaulic pump for HI-flow attachments

    Those skid steers need high flow and high pressure. The skid steer has a high horsepower engine to produce this flow. Like 80-100 HP. A 30 HP tractor will never be able to fully utilize a high or even moderate powered skid steer implement.

  5. #5

    Join Date
    May 2004
    Posts
    38
    Location
    Carnation, WA
    Tractor
    Kubota L4330 HST 4WD

    Default Re: PTO Hydaulic pump for HI-flow attachments

    Well I guess that's what I really needed to know. I'll check around and see if I can find a table/formula for HP vs. flowxPSI... I'm an EE, fluid dynamics was for CE's. Thanks.

  6. #6

    Join Date
    May 2004
    Posts
    38
    Location
    Carnation, WA
    Tractor
    Kubota L4330 HST 4WD

    Default Re: PTO Hydaulic pump for HI-flow attachments

    Thanks. Yes that's about what I was thinking of. Looks like the pump is ~75% efficient. A 32 HP PTO cranks out 21 gpm at 2000 psi = 24 HP. (gpm*PSI/1714 = Fluid HP)
    I'm thinking it's best to stick with rear PTO attachments. Thanks all.

  7. #7
    Gold Member
    Join Date
    Jun 2003
    Posts
    305
    Location
    SE Pa (Chester County)
    Tractor
    John Deere 4300, John Deere 3010 w/48 loader

    Default Re: PTO Hydaulic pump for HI-flow attachments

    Patk,

    Surplus Center has a pretty good on line calculator.

  8. #8
    Epic Contributor Soundguy's Avatar
    Join Date
    Mar 2002
    Posts
    49,136
    Location
    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 Hydaulic pump for HI-flow attachments

    </font><font color="blue" class="small">( I'm an EE, fluid dynamics was for CE's. Thanks. )</font>

    Don't forget ME's.

    Soundguy

  9. #9
    Super Member Highbeam's Avatar
    Join Date
    Feb 2005
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    5,039
    Location
    South Puget Sound, WA
    Tractor
    Kioti CK30HST

    Default Re: PTO Hydaulic pump for HI-flow attachments

    "see if I can find a table/formula for HP vs. flowxPSI... I'm an EE, fluid dynamics was for CE's"

    I'm a CE and would throw this kind of thing to an ME. Sounds like between the three of us we about have it covered.

  10. #10
    Silver Member
    Join Date
    Jul 2003
    Posts
    230

    Default Re: PTO Hydaulic pump for HI-flow attachments

    Why do you need high flow? Standard flow is common for medium to smaller skid steers. Those attachements only require about 10 - 20 gpm's to operate.

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