Hydraulic Valve Solenoids - Toro Groundsmaster 4100-D Service Manual

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.
Testing
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
resistance of the meter and test leads. Subtract this val-
ue from from the measured value of the component you
are testing.
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.
3. Remove 12VDC source from the solenoid. Listen for
solenoid to switch off.
RIGHT
FRONT
4
1. LH wing deck solenoid
2. 2WD/4WD manifold solenoid
Electrical System
4. Measure resistance between the two connector ter-
minals. The resistance for the solenoid coil should be
approximately 7.2 ohms.
5. Reconnect electrical connector to the solenoid.
3
Figure 28
3. RH wing deck solenoid
Page 5 − 18
1
Figure 27
1. Manifold (LH deck shown)
2. Valve solenoid
2
1
4. Center deck solenoid
Groundsmaster 4100−D
2