Valtra Versu N Series, Operator'S Manual

Page: 149 / 518

ON The differential lock is engaged except in the following conditions:
• One or both brake pedals are pressed (the lock re-engages when the brake is released).
• The parking brake is engaged.
AUTO The differential lock engages in the following conditions:
• The wheels are in the middle position.
• The lifting/stop/lowering switch is in the lowering position.
The differential lock disengages in the following conditions:
• The wheels are turned more than 20% from the middle position.
• The lifting/stop/lowering switch is turned to the lifting position.
• One or both brake pedals are pressed.
When controlled by the radar, the differential lock engages when all of the following conditions are
met:
• The speed difference between the rear wheel speed sensor (optional) and the gearbox output
speed sensor is more than 7%.
• The driving speed is higher than 0.3 km/h.
• The radar speed and the gearbox output speed are less than 15 km/h.
• The wheels are in the middle position.
If the tractor is equipped with the steering angle sensor, the differential lock disengages in the
following conditions:
• The wheels are turned more than 20% from the middle position.
• The speed difference between the radar and the gearbox output speed sensor is less than
6%. The disengaging delay is 5 seconds.
• One or both brake pedals are pressed.
• The lifting/stop/lowering switch is turned to the lifting position.
• The clutch pedal is pressed.
OFF The differential lock is always disengaged.
When the differential lock is engaged, the indicator light is lit on the
instrument panel.
If the indicator light on the instrument panel flashes in the automatic position,
there is an error, and the differential lock disengages for safety reasons. The
reason for the error may be one of the following:
•
The speed sensors are not calibrated.
• The turning angle sensor is not calibrated (contact an authorised Valtra
workshop).
• There is a fault in the switch (the service code is displayed).
• There is a fault in the speed sensors (the service code is displayed).
3.8.18.2 Engaging and disengaging the differential lock
You can control the engagement of the differential lock with the differential lock
switch.
If a wheel starts to slip, engage the differential lock. If a wheel is slipping heavily,
reduce the engine speed before engaging the lock. If possible, disengage the
lock while driving on public roads.
NOTE: For optimum performance, engage the differential lock before a wheel
slips.
3. Operation
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