3.8.20 Four-wheel drive
3.8.20.1 Four-wheel drive
The four-wheel drive (4WD) has three positions: ON, AUTO and OFF. The 4WD
can be engaged while driving.
Position Description
ON The 4WD is always engaged.
AUTO The 4WD engages:
• When starting to drive.
• When using the power shuttle.
• When the lift/stop/lower switch is in the lower position OR
• If the tractor equipped with radar: when the rear wheels slip more then 8% in a speed of 0.3
km/h or more.
The 4WD disengages:
• When pressing the clutch pedal.
• If the tractor equipped with radar: when the wheel slip is less than 6%. The disengagement
delay is 3 seconds.
OFF 4WD is disengaged except:
• When pressing both brake pedals or the brake pedal of the reverse drive system.
• When engaging the parking brake.
• When starting to drive or using the power shuttle. Driving start automatics must be activated
(activated as default). The automatics disengage the 4WD after a defined delay after starting
to drive or using the power shuttle. You can define the disengagement delay in the driving
start automatics user settings.
When the 4WD is engaged, the indicator light on the instrument panel is
lit.
If the indicator light on the instrument panel flashes in the automatic position,
there is an error and the 4WD engages. The reason for the error may be one of
the following:
• The speed sensors are not calibrated.
• A switch fault has occurred (the service code is displayed).
3. Operation
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