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Testing a Solenoid Valve Coil
Greensmaster 3120
17230SL Rev C
The Greensmaster 3120 hydraulic manifold uses several solenoid actuated
cartridge valve for system control. When the solenoid coil is energized, hydraulic
cartridge valve shifts and changes the hydraulic circuit flow. Testing a solenoid
coil can be done with the coil installed on the hydraulic cartridge valve.
1.
Park the machine on a level surface and lower the cutting units. Make sure
the engine is off and the key switch is in the OFF position.
2. Disconnect the wire harness electrical connector from the solenoid coil that
is to be tested; refer to
3. Two (2) different size solenoid coils are used on the machine. Identify the coil
resistance specification by measuring the height and the diameter of the coil;
refer
toFigure 94
and the
assist in troubleshooting, identical solenoid coils can be exchanged. If the
problem follows the exchanged coil, a problem with the coil likely exists.
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.
4. Use a multimeter (ohms setting) and measure the resistance between the
solenoid valve coil terminals.
Note: Solenoid coil resistance should be measured with the solenoid at
approximately 20° C (68° F). Resistance may be slightly different than listed
at different temperatures. Typically, a failed solenoid coil will either be shorted
(very low or no resistance) or open (infinite resistance)
5. If the solenoid coil resistance is incorrect, replace the solenoid coil; refer to
the
Cartridge Valves (page
6. If the solenoid coil tests correctly and a circuit problem still exists, check the
wire harness; refer to
7. After testing the coils, connect the wire harness electrical connector to the
solenoid valve coil.
Figure
94.
Solenoid Valve Coil Specifications (page
4–102).
Appendix A (page
A–1).
Page 5–27
Electrical System: Testing the Electrical Components
5–26). To
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