Hydraulic Valve Solenoids
There are four hydraulic valve solenoids on the Ground-
smaster 4100−D (Fig. 28). Testing of these solenoids
can be done with the solenoid on the hydraulic valve.
4. Measure resistance between the two connector ter-
minals. The resistance for the solenoid coil should be
approximately 7.2 ohms.
Testing
5. Reconnect electrical connector to the solenoid.
NOTE: Prior to taking small resistance readings with a
digital multimeter, short the meter test leads together.
The meter will display a small resistance value (usually
0.5
ohms or less). This resistance is due to the internal
1
resistance of the meter and test leads. Subtract this val-
ue from from the measured value of the component you
are testing.
2
1.
Make sure engine is off. Disconnect hydraulic valve
solenoid electrical connector (Fig. 27).
2.
Apply 12VDC source directly to the solenoid. Listen
for solenoid to switch on.
Figure 27
3.
solenoid to switch off.
Remove 12VDC source from the solenoid. Listen for
1.
2.
Manifold (LH deck shown)
Valve solenoid
3
2
RIGHT
FRONT
1
4
Figure 28
1.
2.
LH wing deck solenoid
2WD/4WD manifold solenoid
3.
RH wing deck solenoid
4. Center deck solenoid
Electrical System
Page 5 − 18
Groundsmaster 4100−D
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