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 10
SRV Valve Solenoid
The hydraulic system on the Groundsmaster 3500--D
usesasolenoidvalvecoilonthehydraulic manifold(Fig.
2
12).
When the solenoid valve coil is energized, spool
1
shift in the valve will direct hydraulic flow to the cutting
decks.
Two versions of solenoid coils have been used on the
Groundsmaster 3500--D. Earlier coils had a short har-
ness with a two pin connector (Fig. 11). Later coils use
a use a connector incorporated into the coil body (Fig.
12).
Function and testing of the coils is the same.
Testing
3
1.
electrical connector from the solenoid valve coil.
Make sure engine is off. Disconnect wire harness
Figure 11
3.
1.
2.
Manifold assembly
Solenoid valve
Coil connector
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
fromthe measured value ofthecomponent you aretest-
ing.
2
2.
minals on the solenoid coil. The resistance should be
approximately 7.2 ohms.
Measure resistance between the two connector ter-
1
3.
Reconnect electrical connector to the solenoid.
4.
noid ValveCoil inthe Service and Repairs section ofthis
chapter.
If solenoid coil needs replacement, see PTO Sole-
Figure 12
1.
Manifold assembly
2.
Solenoid valve coil
Groundsmaster 3500--D
Page 5 -- 11
Electrical System (Rev. D)
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