horsch LEEB 12 TD, Operating Instructions Manual, Page: 50 / 181

Vehicle variant Active steering of
both axles (option)
Optionally, an automatic Ackerman steering for
active steering of both axles is available.
2
1
1 Active steering axle
2 Steering cylinder
Field mode
Both axles are actively steered hydraulically.
The machine can follow the tractor nearly exactly
in the track. Turn the hydraulic switch to ON for
this purpose.
With activated Ackerman steering:
¾
0 - 10 km/h: Automatic Ackerman
steering active (full
steering angle)
¾
10 - 15 km/h: Automatic Ackerman
steering active (limited
steering angle)
¾
Above 15 km/h: Automatic Ackerman
steering switches off
automatically!
NOTE
The angle is detected via a gyroscope. No
additional component needs to be connected.
Road mode
•
Front axle: Is locked in the centre position.
Turn the hydraulic switch to OFF .
•
Rear axle:
¾
Under 25 km/h: The axle is in the follow-
up mode
¾
Above 25 km/h: The axle is disabled
automatically to ensure
increased driving stability
and safety.
DANGER
Danger of accident caused by the machine
tipping over!
Activate the Ackerman steering by selecting
road travel on the terminal for road and transport
travel. In addition, the hydraulics lockout switch
must be switched off.
CAUTION
Risk of accident from the machine topping over
at excessive speeds in curves e.g. at the head-
land. Corner only with appropriate speed.
Mechanical release fixture for hydraulic
steering
In case of problems with the steering there is
a locking block with three valves on the rear
steering axle. These valves can be operated
manually by turning the hexagon socket screws.
If the steering of the rear axle has to be locked,
e.g. during manoeuvring work, the centre
valve must be screwed in. After the repair is
completed, the valve must be reset to its original
state.
Steering release fixture
46 47