Hydro Static Transmissions ??

[Mark Page]

Do all HST's work the same way? Does the engine speed change as you press the pedal. Or does it work like a geared machine where you set the throttle and go from there.
It would seem necessary for the engine to be able to keep up with transmission's demands or it would feeel real doggy.
My JD rider works from a constant engine speed, as you depresss the pedal it goes forward with no change in engine speed.

 

[TripleR]

The Kubota HST+ has an "auto throttle" you can set to increase engine speed as you press on the HST pedal, I don't know if other manufacturers have this or not.

http://www.messicks.com/Articles/KubotaHSTplus.aspx

 

[k0ua]

I am pretty sure the e-hydro John Deere also works that way too, but my L3400HST does not vary the engine speed. You must set the hand throttle (there is no foot throttle) to the expected load. While you can dog around at 1000 rpm (usefull when hooking up 3pt) when you are working you will want to be above 1500 for most jobs. The only annoyance is when you stop then the engine is still turning pretty fast and you have to chop the throttle by hand. With the grand L machines this is all automatic. and it will also adjust the swashplate to in essence give lower "gearing" when the load on the system changes. But with the simpler machines like mine is is all about you.

James K0UA

 

[k0ua]

Everything you wanted to know about HST+ but were afraid to ask

[ame=http://www.youtube.com/watch?v=hzO_-LCd838]Kubota HST-Plus Transmission - YouTube[/ame]

James K0UA

 

[jenkinsph]

The auto throttle is an option available for most Deere machines with ehydro. I find it to be a good option and use it all the time on my 4520.

 

[GPintheMitten]

Do all HST's work the same way? Does the engine speed change as you press the pedal. Or does it work like a geared machine where you set the throttle and go from there.
It would seem necessary for the engine to be able to keep up with transmission's demands or it would feeel real doggy.
My JD rider works from a constant engine speed, as you depresss the pedal it goes forward with no change in engine speed.

The "standard" HST works as you describe. You adjust the engine speed separately from the ground speed. That's one of the benefits to HST. You can go as slow as you want and keep the engine rpm's up as necessary to get the power to the pto.

 

[32 chev]

My MF 1531 will work either way

 

[George2615]

My Mahindra has a manual hand lever to set engine RPM (no foot throttle). Speed is then variable using the HST pedal.

 

[massy1635]

My Massey 1635 works both ways.

 

[Brimstone10x]

Im thinking Mark dosent know what a swash plate is , if he did he would already know how a hydro works.