Kioti CK25 Manual page 126

When in any range setting, slowly increase the pressure on the HST travel pedal to the desired level to avoid straining the engine
and drive train.
You will probably find that for most tasks you do with your KIOTI CK25/30, you will be operating in the Hi-Lo range of L and M as
these are most suitable for doing tasks. Any time that you are doing a task that causes your tractor to stop moving because the
tractor's relief valve has opened, you will need to shift the Hi-Lo range selector to a lower setting to obtain more pulling power (in
the case of ground engaging implement use, you may only need to raise the implement slightly to continue forward).
All of the above also apply to using the tractor in reverse; simply press down on the rear of the HST travel pedal to change direction.
Keep in mind that, with less pedal pressure, you will have more torque for pulling. Unlike a foot throttle, the HST travel pedal acts
more like a transmission, with more pressure equaling a higher, less powerful gear. Engine speed can also affect the tractor's
power. Operate only at the necessary speed for the task at hand.
One other tip to keep in mind: It is not necessary to operate the tractor at PTO speeds (540 RPM) for most tasks that do not involve
a PTO implement. Choose the speed that best fits the job without taxing the engine too much or wasting fuel running at too-high
speeds.
NOTE
APPENDIX 15-3