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Hydraulic Valve Solenoids
The hydraulic valve solenoids are located below the
seat and on the hydraulic manifold block.
Note: Prior to taking small resistance readings with a
digital multimeter, short the test leads together. The me-
ter will display a small resistance value (usually 0.5
ohms or less). This resistance is due to the internal re-
sistance of the meter and test leads. Subtract this value
from from the measured value of the component you are
testing.
1. Make sure engine is off. Disconnect solenoid valve
electrical connector.
2
1
2. Apply 12VDC source directly to the solenoid. Listen
Figure 11
for solenoid to switch on. Remove voltage source.
1. Electrical connector 2. Solenoid
3. Measure resistance between the two connector ter-
minals. The resistance should be approximately 7.2
ohms.
Hour Meter
1. Remove electrical connections from meter.
2. Connect the positive (+) terminal of a 12 VDC
source to the positive terminal of the hour meter.
3. Connect the negative (–) terminal of the voltage
source to the other terminal of the hour meter.
4. The hour meter should move a 1/10 of an hour in six
minutes.
5. Disconnect the voltage source from the hour meter.
Figure 12
6. Reconnect electrical connections to meter. Make
sure to observe polarity.
Electrical System
Page 6 – 12
Rev. A
Groundsmaster 3000/3000–D