SkyTrak 3606 Service Manual User Manual
Page 394
Section 10
10-76
Model 3606 • Origin 10/99
10.8.18 Steer Select Valve
The steer select valve (Fig. 10– 95), is secured to the
steer select manifold and frame with four capscrews and
O-rings near the hydraulic fluid reservoir.
It contains two solenoids that direct hydraulic fluid
through hoses and ultimately help operate the steering.
The valve is a direct dual-solenoid operated, spool-type
directional control valve. The steer select valve controls
the start, stop and direction of hydraulic fluid flow to the
steering cylinders mounted on each axle.The valve con-
sists of a housing (2, Fig. 10– 96), two solenoids (3), a
control spool (4), and two return springs (5).
In the de-energized state, the spool (4) is held by the
return springs (5) in the center position. The spool is
shifted through the action of the two wet-pin type
solenoids (3).
The force of an acting solenoid works against the push
pin (6) on the end of the spool (4). The spool is shifted
from its normal position to the end position for selected
flow. The selected flow pattern is covered in Section 9
Hydraulic System.
Figure 10– 95. Steer select valve location and mounting.
Figure 10– 96. Steer select valve detail.
When the solenoid is de-energized, the control spool (4,
Fig. 10– 96) is returned to its normal condition by the cen-
tering springs (5).
Check the steer select valve solenoids for proper opera-
tion and check the wiring for continuity or shorts. When
energized/de-energized, the solenoid should move and/
or an audible “click” should be heard; check for the pres-
ence of voltage with a voltmeter. Replace a defective or
faulty steer select valve with a new unit. Refer to Section
10.9 Electrical System Troubleshooting.
MS1740
Steer Select
Solenoid Valve
Capscrew
Capscrew
Hydraulic Hose
1. O-rings
2. Housing
3. Solenoids (2)
4. Control Spool
5. Return Springs
6. Push Pin
7. Manual Override
8. Solenoid-operated Valve
MS2060