Zetor CRYSTAL Series, Operator'S Manual

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Front drive axle control
Driving with engaged front axle drive
Use front drive axle when rear wheels slip to increase the tractor´s traction. It is not
recommended to drive with engaged front axle drive on the roads or hard surfaces (driving with
engaged front axle drive causes increased wear of front tyres).
Permanent engagement of front drive axle is admitted if there is an agricultural machine or tools mounted to
the tractor from the front. This condition is listed in instructions manual of an applicable machine. The
maximum permitted speed of these sets is 15 km.h
-1
.
Manual Front drive axle control
C15N069
Engagement of front drive axle in manual mode is done by pressing a button which returns to its initial
position after release. The disengagement of front drive axle is done by repeated pressing of the button. The
engagement of front drive axle is signalized by a lit symbol on the switch and a symbol on the display of the
dashboard.
Automatic disconnection of front drive axle
When exceeding travel speed of 20 km/h, the drive of front drive axle is automatically disconnected.
Automatic disconnection of the drive is signalized by blinking of control in a switch. After switching off of the
blinking control, front drive axle is automatically disconnected.
With the drop of travel speed under 20 km/h, front drive axle can be connected by a repeated depression of
a button.
With speeds higher than 20 km/h, the drive of front drive axle can be connected by repeated depression of
a blinking button.Front axle drive is engaged permanently by a long pressing of a button (app. 3s) for the
whole period of tractor drive (without disengagement of automatics). Front axle drive remains engaged also
when overcoming travel speed of 20 km/h. By putting the tractor at standstill, front axle drive is disengaged
automatically.
The switch from manual to automatic mode can be done after the disengagement of manual mode.
Front drive axle control button is placed on the panel on
the right rear mudguard.
By pressing the upper part of the button, the function
manual mode is engaged - front drive axle control.
By pressing the lower part of the button (auto symbol) the
function automatic mode - front drive axle control is
engaged.
With the tractor at stand-off (tractor braked, engine
stopped, the key of switchbox disengaged) front drive axle
drive is off.
After restart of the engine, front drive axle returns to the
mode it was before turning the engine off.
C15N070
DRIVING OPERATION
78