SkyTrak 6036 Service Manual - Manual (Page 272)

Hydraulic System
8.56 Model 6036 Legacy
Figure 8-24 Four-Wheel Steering Mode
b. Four-Wheel Steering
When the steer select switch (Fig. 8-24, 1) is in
the four-wheel steer (rear) position (2), the front
wheels (3) will steer in the direction the steering
wheel is turned and the rear wheels (4) will steer
in the opposite direction.
1. Four-Wheel Steering Left Turn (Fig. 8 -18)
With the steer select switch (Fig. 8-24, 1) in the four-
wheel steer (rear) position (2), one of the steer select
valve solenoids is energized. The power steering unit
control valve spool is shifted so that the system pressure
from the secondary function valve is applied to the intake
side of the power steering unit metering section.
A specific amount of hydraulic oil is exhausted from the
metering section and routed back to the power steering
control valve section, internal to the power steering unit,
where it is channeled to the left rod end of the front
steering cylinder.
Oil from the right rod end of the front steering cylinder
flows through the steer select valve to the left rod end of
the rear steering cylinder. Oil from the right rod end of the
rear steering cylinder flows through the steer select valve
and back to the power steering control valve, then to the
return filter in the reservoir.
2. Four-Wheel Steering Right Turn (Fig. 8-19)
With the steer select switch (Fig. 8-24, 1) in the four-
wheel steer (rear) position (2), one of the steer select
valve solenoids is energized. The power steering unit
control valve spool is shifted so that the system pressure
from the secondary function manifold is applied to the
intake side of the power steering unit metering section.
A specific amount of hydraulic oil is exhausted from the
metering section and routed back to the power steering
control valve, internal to the power steering unit, where it
is channeled through the steer select valve to the right rod
end of the rear steering cylinder.
Oil from the left rod end of the rear steering cylinder flows
through the steer select valve to the right rod end of the
front steering cylinder. Oil from the left rod end of the front
steering cylinder flows back to the power steering control
valve, then to the return filter in the reservoir.
MA7020
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MT3880