Hour Meter; Srv Valve Solenoid - Toro 30821 Service Manual

Hour Meter

1. Connect the positive (+) terminal of a 12 VDC source
to the positive terminal of the hour meter.
2. Connect the negative (- ) terminal of the voltage
source to the other terminal of the hour meter.
3. The hour meter should move 1/10 of an hour in six
minutes.
4. Disconnect the voltage source from the hour meter.

SRV Valve Solenoid

The hydraulic system on the Groundsmaster 3500- D
uses a solenoid valve coil on the hydraulic manifold (Fig.
12). When the solenoid valve coil is energized, spool
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
1. Make sure engine is off. Disconnect wire harness
electrical connector from the solenoid valve coil.
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 the measured value of the component you are test-
ing.
2. Measure resistance between the two connector ter-
minals on the solenoid coil. The resistance should be
approximately 7.2 ohms.
3. Reconnect electrical connector to the solenoid.
4. If solenoid coil needs replacement, see PTO Sole-
noid Valve Coil in the Service and Repairs section of this
chapter.
Groundsmaster 3500- D
1
1. Manifold assembly
2. Solenoid valve
1. Manifold assembly
Page 5 - 11
Hobbs
QUARTZ
1
0 0 0 0 1
10
HOURS
+
BACK
Figure 10
3
Figure 11
3. Coil connector
2
1
Figure 12
2. Solenoid valve coil
Electrical System (Rev. G)
2