Toro Groundsmaster 3500 30807, Руководство по обслуживанию

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Groundsmaster 3500 Page 6 − 30 Electrical System
Hydraulic Cartridge Solenoid Valve Coils
The hydraulic system on the Groundsmaster 3500 uses
a solenoid valve coil to actuate a cartridge valve on the
hydraulic manifold (Fig. 39). When the solenoid valve
coil is energized, spool shift in the valve will direct hy-
draulic flow to the cutting decks.
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 Hydraulic
Cartridge Valve Coil in the Service and Repairs section
of this chapter.
1. Manifold assembly 2. Solenoid valve coil
Figure 39
1
2