Service manual

Section 10
10-74
Model 3606 • Origin 10/99
Figure 10– 88. The steer select switch has three positions.
Steering select indicators on the right side of the opera-
tors display panel illuminate per the switch selected
mode, and the steering select solenoids are energized or
de-energized accordingly to provide the type of steering
selected. The switch allows four-wheel steering (the rear
wheels turn opposite the front wheels), two-wheel steer-
ing (the front wheels only), or crab steering (the rear
wheels turn in the same direction as the front wheels).
b. Steering modes and conditions:
• Four-wheel steer mode: (Fig. 10– 89) With the steering
select switch in the forward most position, the following
conditions must be met:
1. Four-wheel steer mode light (only) must be
illuminated on the operators display panel
(Fig. 10– 86).
Figure 10– 89. Four wheel steering.
2. Front wheels must steer in the direction that the
steering wheel is turned.
3. Rear wheels must steer in the opposite direction from
which the steering wheel is turned.
• Two-wheel steer mode: (Fig. 10– 90) With the steering
select switch in the centered position, the following condi-
tions must be met:
Figure 10– 90. Two wheel steering.
1. Front-wheel steer mode light (only) must be
illuminated on the operators display panel
(Fig. 10– 86).
2. Front wheels must steer in the direction that the
steering wheel is turned.
3. Rear wheels must remain in a fixed forward position
and not move.
• Crab-steer mode: (Fig. 10– 91) With the steering select
switch in the rear most position, the following conditions
must be met:
Figure 10– 91. Crab steering.
1. Crab-steer mode light (only) must be illuminated on
the operators display panel (Fig. 10– 86).
2. Front wheels must steer in the direction that the
steering wheel is turned.
3. Rear wheels must steer in the direction that the
steering wheel is turned.
FRONT
WHEEL
OS0640
FOUR
WHEEL
STEERING
STEERING
CRAB
STEERING
OS0280
OS0290
OS0310