What Is HST?

Hydrostatic Transmission



Hydrostatic transmissions are relatively new and have been integrated into almost every new piece of farm equipment.  Automatic and manual transmissions still dominate the passenger vehicle manufacturers, but in the heavy duty equipment field, hydrostatic transmissions have taken storm.  HST drive trains are here to stay and for very good reasons.




How Does It Work?


HST Pedal

An HST does not rely on gears that determine speed or direction and therefore does not need a clutch.  The transmission is different in that it relies on fluid from a piston pump to be transferred through a series of tubes to the motor.  The energy produced is what powers the vehicle for different speed rates and direction.  Pushing the lever forward will result in a forward motion concurrent with the degree that the lever is pushed forward.  The same goes for the reverse function.  On Kubota tractors, the lever has been replaced with a fully functional pedal to make this operation even easier.






What Are The Benefits?



Hydrostatic transmissions are generally much easier to operate.  The elimination of the clutch pedal allows the operator to focus on the other movements of the machine.  The machine’s speed and power can be controlled by a lever instead of using brakes.  This is extremely important when a large machine is operating up or down an incline.  The HST also allows for more power to be immediately released making jobs more efficient for the operator.