Toro Groundsmaster 360 Service Manual page 328

Testing the Hydraulic Solenoid Valve Coils
Electrical System: Testing the Electrical Components
coil (Figure 234). Refer to
Testing of the coils can be done with the coil installed on the hydraulic valve.
Note: Before you disconnect the solenoid valve coils, test the solenoids and
their circuit wiring as TEC outputs with the InfoCenter display; refer to
InfoCenter Display for Troubleshooting (page
that the solenoid coils and circuit wiring are functioning correctly, then no more
testing is necessary.
1. Park the machine on a level surface, lower the cutting deck, shut off the
engine, set the parking brake, and remove the key from the key switch.
2. Raise and support the operator seat to get access to the control manifolds
and solenoid coils.
3. Locate the hydraulic solenoid valve coil that is to be tested
Disconnect the wire harness connector from the coil.
4. Identify the height and diameter of the coil that you are testing.
Note: Before taking the small resistance readings with a digital multimeter,
short the multimeter test leads together. The multimeter displays a small
resistance value (usually 0.5 ohms or less). This resistance is because of the
internal resistance of the multimeter and test leads. Subtract this value from
the measured value of the component that you are testing.
Note: The solenoid coil resistance should be measured with solenoid at
approximately 20°C (68°F). Resistance may be slightly different than listed
at different temperatures. Typically, a damaged solenoid coil will either be
shorted (very low or no resistance) or open (infinite resistance).
5. Use a multimeter (ohms setting), measure the resistance between the 2
connector terminals on the solenoid coil. The resistance for the solenoid coils
is identified in the Solenoid Valve Coil Specifications Table (page
Solenoid Valve Coil Specifications Table
Solenoid Valve Coil
Deck lift manifold S2 35.8 mm (1.41 inches)
Deck lift manifold S1 46.7 mm (1.84 inches)
Steering selector 46.7 mm (1.84 inches)
manifold
6. If the solenoid coil resistance is incorrect, replace the solenoid coil; refer to
Hydraulic Solenoid Valve Coils (page
7. After testing the coils, connect the wire harness electrical connector to the
solenoid valve coil.
8. Lower and secure the operator seat.
Solenoid Valve Coil Specifications Table (page
5–30). If the InfoCenter verifies
Diameter
36.3 mm (1.43 inches)
49.9 mm (1.96 inches)
49.9 mm (1.96 inches)
5–106).
Page 5–92
(Figure
5–92).
Height Resistance
8.8 ohms
7.1 ohms
7.1 ohms
Groundsmaster 360
16225SL Rev C
5–92).
Using the
233).