Hour Meter
1.
to the positive terminal of the hour meter.
Connect the positive (+) terminal ofa12 VDC source
Hobbs
2.
source to the other terminal of the hour meter.
Connect the negative (--) terminal of the voltage
QUARTZ
1
10
0
0 0 0 1
HOURS
3.
The hour meter should move 1/10 of an hour in six
minutes.
+
4.
Disconnect the voltage source from the hour meter.
BACK
Figure 8
Solenoid Valve Coil
The hydraulic system on the Groundsmaster 3505--D
usesasolenoidvalvecoilonthehydraulic manifold(Fig.
3. Reconnect wire harness connector to the solenoid
coil.
9).
draulic flow is directed to the cutting decks.
When the solenoid valve coil (R1) is energized, hy-
4.
noid ValveCoil inthe Service and Repairs section ofthis
chapter.
If solenoid coil needs replacement, see PTO Sole-
The standard control module provides current to the so-
lenoid valve coil based on the position of several inputs.
ALEDonthestandardcontrolmodulewillbeilluminated
when the solenoid valve coil is energized.
2
Testing
NOTE: Thesolenoid does nothavetoberemovedfrom
the cartridge valve for testing.
1.
plug wire harness electrical connector from solenoid
valve coil.
Make sure ignition switch is in the OFF position. Un-
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
fromfromthemeasured valueofthecomponent youare
testing.
1
Figure 9
2.
2.
connector terminals. Resistance of the solenoid coil
should be approximately 7.5 ohms.
Measure resistance between the two solenoid coil
1.
Manifold assembly
Solenoid valve coil
Groundsmaster 3505--D
Page 5 -- 11
Electrical System
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