Steering Circuits: 4Wd Machines - Toro Groundsmaster 360 Service Manual

Steering Circuit: 4WD Machines (Fig. 14)
The gear pump, steering control valve and steering cyl-
inders used on 4WD machines are the same as the hy-
draulic components used on 2WD machines. The
steering circuit on 4WD machines, therefore, operates
basically the same as the steering circuit on 2WD ma-
chines. Refer to Steering Circuit: 2WD Machines in this
section for information on steering system operation.
4WD machines include the feature of allowing the oper-
ator to choose between 2 or 4 wheel steering. The steer-
ing selector switch on the control panel is used to control
the hydraulic steering system for this feature.
2 Wheel Steering (Fig. 14)
When the front of the steering selector switch is de-
pressed with the wheels directed straight ahead, steer-
ing will only be active on the front wheels. This position
is recommended for transporting the machine. The
switch indicator light will be illuminated when the ma-
chine is in 2 wheel steering operation.
Groundsmaster 360
In this switch position, the steering control manifold so-
lenoid valve is not energized. Flow from the steering
control valve in either steering direction is directed only
to the front steering cylinder. The rear steering cylinder
remains in the centered, straight ahead position.
4 Wheel Steering (Fig. 14)
When the rear of the steering selector switch is de-
pressed with the wheels directed straight ahead, 4
wheel steering will be active. The switch indicator light
will not be illuminated when 4 wheel steering is active.
In this switch position, the steering control manifold so-
lenoid valve is energized. Flow from the steering control
valve in either steering direction is directed to both the
front and rear steering cylinders.
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