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HST Engine braking

bczoom

Super Moderator
Staff member
GOLD Site Supporter
OK, I saw this on another forum where we discuss the Kubota RTV (which has a HST transmission)

The poster is looking for a description on how HST engine braking works. I've got the concept down but having difficulty putting into words that make sense.

Here's the post. Can anyone provide me/us a good description?

It was asked, does the engine do the braking on the RTV coming to a stop. Or is it really the hydro-transmission. I know we all call it a engine brake. But, really, what will be the right answer to tell 'em folks who ask.

I explained to them how the " Jake" brake, or engine brake works on our Peterbuilts. Or compression release engine brakes. They still look at me with doubt. And the statement then comes in to the effect of, " ok, well how does it work on the hydro-transmisson. " Confused [*-)]

The questions has been asked from several local folks, and then, read it on another site .......
 

sleeper

Member
bczoom,

I don't know about the RTV but for tractors the Hydro does the braking not the engine. I say this because my wheel horse garden tractor is a hydro and the engine runs at a consistent 3400 RPM, but when I go down hills the machine remains at a constant speed....it won't pick up speed while going down hill unless I manipulate the hydro lever. My Kubota BX22 acts the same way. Soooo I would be led to believe that the braking is in the Hydro system not the engine. Now, as to how all of that works...I haven't got a clue.....sorry.

Jeff
 
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