Toro Groundsmaster 5900 Series Service Manual page 367

Hydraulic Solenoid Valves
Testing
Groundsmaster ® 5900 & 5910
16227SL Rev B
There are numerous coil actuated hydraulic solenoid valve on the Groundsmaster
hydraulic manifolds. When the coils are energized, hydraulic valve shift occurs to
control hydraulic flow.
Note: A faulty solenoid coil or solenoid circuit wiring problem will not be identified
by the Info Center Display. The Info Center Display can be used to verify that
output current from the appropriate TEC is available for the solenoid coil but
the Display will not verify that the solenoid coil and circuit wiring is functioning
correctly (see InfoCenter Display (page
Testing solenoid coils can be done without removing the coil or hydraulic valve
as follows:
1. Locate the solenoid valve coil to be tested and disconnect the wire harness
electrical connector from the coil.
Note: Prior to taking small resistance readings with a digital multimeter, short
the meter test leads together. The meter may 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 value from the measured
value of the component you are testing.
1
g288589
1. Steering/Lift manifold
2. Solenoid valve S8
3. Solenoid valve S1
4. Solenoid valve S3
5. Solenoid valve S2
6. Solenoid valve S4
6–9)).
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2
Figure 248
7. Solenoid valve S7
8. Solenoid valve S6
9. Solenoid valve S9
10. Solenoid valve S5
11. Solenoid valve S10
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Electrical System: Component Testing