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  1. #11
    Platinum Member
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    Apr 2012
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    743
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    pa
    Tractor
    kubota 7040sud

    Default Re: how much power does hst use vs gear

    i know an auto tranny in a car say a turbo 400 takes 50-60 horse power to turn so maybe 10-15 hp on a hst tractor

  2. #12
    Platinum Member
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    Oct 2010
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    578
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    WI
    Tractor
    '13 Yanmar Lx4100

    Default Re: how much power does hst use vs gear

    After having a geared tractor and a FEL I dont think i'll ever go back to that once I got on an HST, I dont even use the brakes anymore.

  3. #13
    Super Member radioman's Avatar
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    May 2008
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    5,697
    Location
    Ontario, NY
    Tractor
    Kubota BX24

    Default Re: how much power does hst use vs gear

    well-- I would like to believe that a HST is more efficient then geared. With HST, the power being used to run pump is constant - so its easier to figure out your fuel use. Of course with a geared or HST tractor if you are pushing or pulling hard the fuel use goes up - but on HST the reliefs starts to kick in at max so its constant level of poweer being robbed - of not more on a geared tractor. Just my opinion- I could be wrong though..

  4. #14
    Super Member Gary Fowler's Avatar
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    Jun 2008
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    8,428
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    Bismarck Arkansas
    Tractor
    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: how much power does hst use vs gear

    I have both geared and HST tractors. The small kubota B26 with backhoe will run out of traction before it runs out of power. I think the world average is about 2 HP lost vs same tractor with gear drive. I think someone already stated that if you are doing loader work and lots of forward reverse action, and HST is the best but it you are mowing straight line in a large pasture or using tillage equipment all day long a gear drive might be more suited. The one thing I like the gear drive over the HST is that I don't have to have a foot on the GO pedal all the time and that leaves both feet free to do braking and clutching. A few HST tractors will have a clutch also and maybe one will have the brakes on the left and HST pedal on the right but most have brakes on the same side as the HST pedal so it in nearly impossible to use the breaks for steering, that is assuming the tractor has steering brakes. Some only have one brake pedal which for me would be an automatic pass by on buying a tractor but some folks don't need them. To me a steering brake on a tractor is like a concealed weapon, its not very useful until you really need it.
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

  5. #15
    Super Member Gary Fowler's Avatar
    Join Date
    Jun 2008
    Posts
    8,428
    Location
    Bismarck Arkansas
    Tractor
    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: how much power does hst use vs gear

    Quote Originally Posted by case245 View Post
    i know an auto tranny in a car say a turbo 400 takes 50-60 horse power to turn so maybe 10-15 hp on a hst tractor
    I think this is an old wives tale from the young fools drag racing days where everyone thought a standard was the only way to go. The old turbo 400s lost as bit of power in the clutches but not nearly that much and it wasn't so much that it took that 50-60HP to turn the tranny, just lost a bit on the low end due to slippage. Todays transmissions are much more efficient.
    When it comes to power loss, everything(including gear drive) looses it due to friction loss. That is what keeps the proverbial perpetual motion machine from working. The fewer gears or other apparatus that the power moves thru before getting to the final drive the less friction losses there is.
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

  6. #16
    Platinum Member
    Join Date
    Oct 2010
    Posts
    779
    Location
    Northern, NJ
    Tractor
    Kubota L45

    Default Re: how much power does hst use vs gear

    We can use "kubota Math" to try to extract:

    L45 is basically an L39 w/ a HST+.

    I have owned both. I like both. The GST and HST each have their advantages and I won't get into it. Here are some stats:

    L39:
    39 HP
    GST
    30.5 HP PTO

    L45:
    45 HP (Gross Power)
    42.5 HP (Net Power)
    HST+
    32 HP PTO

    With that math...

    The L39 has 6 less HP but only 1.5 less HP at the PTO. What's the deal with "gross" vs "net" SAE ratings on the L45? Somewhere the HST+ is using some HP...

    ac

  7. #17
    Platinum Member Buckgnarly's Avatar
    Join Date
    May 2012
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    529
    Location
    West topsham VT
    Tractor
    Kioti DS3510

    Default Re: how much power does hst use vs gear

    Quote Originally Posted by Gary Fowler View Post
    I have both geared and HST tractors. The small kubota B26 with backhoe will run out of traction before it runs out of power. I think the world average is about 2 HP lost vs same tractor with gear drive. I think someone already stated that if you are doing loader work and lots of forward reverse action, and HST is the best but it you are mowing straight line in a large pasture or using tillage equipment all day long a gear drive might be more suited. The one thing I like the gear drive over the HST is that I don't have to have a foot on the GO pedal all the time and that leaves both feet free to do braking and clutching. A few HST tractors will have a clutch also and maybe one will have the brakes on the left and HST pedal on the right but most have brakes on the same side as the HST pedal so it in nearly impossible to use the breaks for steering, that is assuming the tractor has steering brakes. Some only have one brake pedal which for me would be an automatic pass by on buying a tractor but some folks don't need them. To me a steering brake on a tractor is like a concealed weapon, its not very useful until you really need it.
    That is a really good point I never thought about. Is the pedal for HST usually on the same side as the brakes?
    My gear Kioti has cutting brakes and I never thought I would use them until this Winter....pushing snow with the FEL I discovered the GREAT steering you get from them. The front wheels are useless on the ice, but the brakes work awesome for steering!

  8. #18
    Elite Member nybirdman's Avatar
    Join Date
    Feb 2009
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    2,643
    Location
    north of upstate ny
    Tractor
    Kubota L4240 HSTC,L3000DT

    Default Re: how much power does hst use vs gear

    I pulled a 2/12 bottom plow for 4 years with a L3130 HST 4WD kubota with no problem.Used 4WD most of the time,this is in the rock strewn North-east.Ten acres per year.R1 tires,31.5 HP.

  9. #19
    Super Member Gary Fowler's Avatar
    Join Date
    Jun 2008
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    8,428
    Location
    Bismarck Arkansas
    Tractor
    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: how much power does hst use vs gear

    Quote Originally Posted by Buckgnarly View Post
    That is a really good point I never thought about. Is the pedal for HST usually on the same side as the brakes?
    My gear Kioti has cutting brakes and I never thought I would use them until this Winter....pushing snow with the FEL I discovered the GREAT steering you get from them. The front wheels are useless on the ice, but the brakes work awesome for steering!
    I use the steering brakes to keep the tractor going my direction when back dragging or going forward but just using the heel of the bucket to smooth out muddy ruts with the FEL. Without using the brakes, it tends to drift to the high side which has more drag. It is difficult with the kubota as the brakes are on the same side as the HST pedal just as most tractors are. SOMEONE jump in here with a model where the brakes are on the left side as I know there are a few that are that way.
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

  10. #20
    Silver Member mowin's Avatar
    Join Date
    Sep 2012
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    115
    Location
    upstate ny
    Tractor
    JD 3320

    Default Re: how much power does hst use vs gear

    Quote Originally Posted by Gary Fowler View Post
    I use the steering brakes to keep the tractor going my direction when back dragging or going forward but just using the heel of the bucket to smooth out muddy ruts with the FEL. Without using the brakes, it tends to drift to the high side which has more drag. It is difficult with the kubota as the brakes are on the same side as the HST pedal just as most tractors are. SOMEONE jump in here with a model where the brakes are on the left side as I know there are a few that are that way.
    My JD 3320 has the go peddels on the right and the brakes on the left. I use them when back dragging also. only way to keep a straight line..

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