Kioti CK25 Owner's Manual page 135

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.
Keep in mind, also, that the more you press on the travel pedal, the higher the "gear ratio" and less pull you will have. In
other words, pressing the travel pedal fully forward is like having a geared tractor in its highest gear which may not be
suitable for strong pulling, but would be good for trans-porting across a long distance, or easy mowing in a large field.
You will probably find that for most tasks you do with your KIOTI CK25/30/35, 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
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APPENDIX -3