McCONNEL MULTIDRIVEM380‐4&M420‐4
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Mode selection
To select a mode use the yellow buttons to scroll up and down to select from one of the
following modes:
Road mode. In the Road mode position the electronics are deactivated for safety
and the rear axle will be locked hydraulically. Before switching to this position, allow the
rear wheels to straighten up in Two Wheel Steer. After a few miles on the road the wheels
may tend to "creep". If this happens slow down to less than 5 mph, switch back to Two
wheel Steer (which will quickly straighten the rear wheels) and then switch back to Road
mode again. The steering system should not be operated at speeds above 12 mph. If this
speed is exceeded the system will automatically straighten the rear wheels and will shut
down into road mode.
Two wheel steer/auto. In Two Wheel Steer mode the rear axle position is
monitored continually and fine adjustments will be made by the system to ensure the
wheels keep straight. You may switch to this position at any time in the field and the rear
wheels will straighten up automatically once the front wheels pass through the “Mode
activation window” (see next section below). When this mode is selected you can also use
the 4ws toggle (red) button to change between 2 and 4 wheel steer modes. If headland
mode is active it will automatically switch between 2 and 4 wheel steer mode when the
sprayer is switched on/off
Four wheel steer. In Four Wheel Steer mode the rear wheels will always follow the
front ones and will give the tightest turning circle. You may switch to and from this position
at any time in the field and the rear wheels will re-align automatically when the front
wheels pass through the “Mode activation window” (see next section below).
Delay mode. In delay mode the rear wheels will only start to move when the front
wheels have passed an angle of approximately 8 degrees. This is useful when spraying as
it allows a degree of deviation from the straight ahead position with the front wheels
without the rear wheels moving. This is better than four wheel steer as you travel down the
field as it keeps the boom more stable. For headland turns the rear steering comes in once
you have started the turn and the slight delay also makes for more accurate wheel tracking
as you turn.
Crab steer. Crab steer may sometimes be useful when maneuvering in buildings
and in tight corners in fields. The rear wheels turn in the same direction as the front ones
allowing the machine to move sideways.
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