Toro Greensmaster eTriFlex 3360 Service Manual page 202

Testing the Contactors (continued)
Electrical System: Testing the Electrical Components
Note: Prior to taking small resistance readings with a digital multimeter, short
the meter test leads together. The meter will display a small resistance value
(usually 0.5 ohms or less). This resistance is due to the internal resistance of
the meter and test leads. Subtract this value from the measured value for
the tested component.
5. Apply 48 VDC directly across the contactor coil terminals. The contactor
should should produce an audible "click". With the contactor coil energized,
resistance across the contactor main terminals should be less than 1 ohm.
6. Remove the voltage from the contactor coil terminals. The contactor should
produce an audible "click". With the contactor coil not energized, resistance
across the contactor main terminals should be infinite ohms.
7. Measure the resistance across the contactor coil terminals. Resistance of
the coil should be approximately 195 ohms.
8. If testing determines that the contactor is faulty, replace the contactor.
9. If the contactor tests correctly and a circuit problem still exists, check the wire
harnesses; refer to
10. After testing, connect the harness electrical connectors to the contactor.
Secure the main terminal connectors with flange nuts and tighten the nuts
from 4.5 to 5.6 N·m (40 to 50 in-lb). Secure the coil terminal connectors with
keps nuts and tighten the nuts from 1.5 to 1.7 N·m (13 to 15 in-lb). Apply
battery terminal protector Toro Part No. 107-0392 or a light layer of grease to
the contactor terminals and cable connectors to reduce corrosion.
11. On model 04580 machines, connect the battery negative (-) cable at the
12V system battery. Connect the 48V battery disconnect before returning
the machine to service.
Appendix A (page A–1).
Page 5–98 Greensmaster® eTriFlex 3360 and 3370
19239SL Rev B