Question about Kubota HST operation: Kubota Review  -- Kubota Tractors Discussion Forum and Review Question about Kubota HST operation: Kubota Review -- Kubota Tractors Discussion Forum

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 07-10-2003, 19:58 Post: 59295
8NFord



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 Question about Kubota HST operation

On the BX Series, does it hurt the tranny at all to ride around at less than full pedal on the transmission speed control. I mean is it like"slipping the clutch" when you are less than full pedal? This would not be good.
Thanks,
JD






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 07-10-2003, 21:00 Post: 59302
DK35vince



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 Question about Kubota HST operation

No,
Run the peddle where ever your power and speed are working best.






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 07-10-2003, 21:07 Post: 59303
Billy

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 Question about Kubota HST operation

wolbert is absolutely right. You can inch along if you want or go full peddle, it's up to you.






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 07-10-2003, 21:23 Post: 59305
jeff r



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 Question about Kubota HST operation

Geee......isnt Hydro fun you gear guys???






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 07-10-2003, 22:42 Post: 59311
DRankin



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 Question about Kubota HST operation

Well..... being a gear guy, with my BX I have a tendency to just push the pedal to the floor and adjust my ground speed with the hand throttle.

It's a little quieter that way.






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 07-11-2003, 04:48 Post: 59320
TomG

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 Question about Kubota HST operation

Most HST's are variable displacement hydraulic pumps that drive hydraulic motors (there are variations on the idea). The range section of a HST is usually a conventional sliding gear design.

The speed pedal controls the volume of oil pumped. Less oil turns the motor slower, which means slower ground speeds. Slow pedal positions also are the equivalent of lower gears since the engine has to turn over more revs for the tractor to cover a given distance. When an engine lugs, the speed pedal may be reduced rather than increased like a gas engine accelerator, which is the equivalent of gearing it down.

There are no slipping or partially engaged parts to wear when operating low seed pedal and 'inching along' is what HST's are good at.






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 07-11-2003, 06:56 Post: 59325
Art White



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 Question about Kubota HST operation

Something that should be addressed is putting a high load on the the tractor at a low rpm. This is definitly a no-no! It wil cause damage to the hydro unit from oil starvation or cavatation depending on how you want to call it. This type action on a gear drive might also cause the engine to lug and an increase in the throttle and it goes away.






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 07-11-2003, 08:45 Post: 59335
DRankin



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 Question about Kubota HST operation

That is good info Art, thanks.
I usually run about 1/2 + throttle in low anyway. Hard to go much faster with rough ground and small wheels.

Kubota really needs to put a tach on this model.






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 07-13-2003, 22:39 Post: 59448
jeff r



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 Question about Kubota HST operation

For you guys that have a 3 range gear box on your HST it is possible to lug the engine by using low range #2 when your really need Low range #1. I know low range #1 is slower than slow , but it has the power you need when the going get tough and range 2 doesn't have the power to do the job. Going into a pile of dirt with the front loader IS NOT A JOB FOR RANGE #2!!! For some of you this won't make sense because you don't have a 3 range gear box, but for the guys that do it is REAL GOOD information. I hardly ever use Range 3 other than travel on the road at high speed on my B-2150.






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 07-14-2003, 06:08 Post: 59452
TomG

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 Question about Kubota HST operation

Good points from Art and Jeff. Gear heads like myself can lug the engine and not do it any favours. People with HST can mess up both the engine and HST by lugging the engine. Well, I guess gear heads might not be doing clutches any favours using gears that are too high and rpm's that are too low.

I have four ranges and like Jeff I use 4th only when roading the tractor. Fourth range even in first gear at pro rpm is way too fast for any work I do other than getting down the highway. Gear do impose greater discipline than HST's because I can't infinitely vary ground speed in any range and I know better than to cut rpm in order to slow down. MY TX tes me I'm in the wrong gear before the engine lugs 'cause I'm going too fast.






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Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

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8NFord 1 | Art White 2 | Billy 1 | DK35vince 1 | DRankin 3 | jeff r 3 | Murf 1 | TomG 2 |




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