McCONNEL MULTIDRIVEM380‐4&M420‐4
41
Steering Modes
The rear wheel steer system on the Multidrive is controlled electronically. Signals from
sensors mounted on both axles are continually monitored by the electronic control box and
a varying signal is sent from the control to an electro-hydraulic proportional valve which, in
turn, directs oil to the steering ram on the rear axle to ensure the rear wheels are always
kept in the correct position. The rear wheel position is also continually monitored when in
two wheel steer and crab modes, again, to ensure that the wheels do not "creep" and to
keep them in the correct position.
Safety precautions
1. Always ensure the rear wheel area is clear before activating the four wheel steer
system.
2. Always switch to the road mode position for speeds above 12 m.p.h. (20 kph)
3. Do not switch modes when travelling at speed.
4. Danger of trapping, on no account allow any
person to be placed between the wheels and chassis
while the engine is running, always remove the
ignition key and isolate the battery before accessing
the area.
Rear steering activation
The rear steering system is controlled by buttons on the joystick. Options are selected
from a menu on the main display. To bring up or switch off the Steering menu on the
display press the left hand (black) button on the underside of the joystick. If the steering is
currently in road mode the red button will also bring up or switch off the menu.
If no buttons are pressed the pop-up menu will disappear after 5 seconds. The centre
joystick icon indicates which buttons are available. They will only work if the appropriate
steering mode has been selected.
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