Different fan drives
Mechanical fan drive:
The mechanical fan is driven directly by the power take-off. Problem-free operation is also possible with tractors that have a low hydraulic capacity.
Convenient hydraulic fan drive:
The hydraulic fan drive facilitates convenient fan speed adjustment and thus ensures even longitudinal distribution, even in undulating terrain. The fan speed is set conveniently and independently from the engine speed, so that the revs always remain constant and run in the optimal range.