Toro Groundsmaster 5900 Series Service Manual page 352

Testing (continued)
Electrical System: Component Testing
2
g288535
1. Contactor
2. Main posts
4. Using jumper wires, apply 12 VDC directly across the contactor coil posts
(Figure 230). The contactor should click. With the contactor coil energized,
resistance across the contactor main posts should be less than 1 ohm.
5. Remove voltage from contactor coil posts. The contactor should click. With
the contactor coil not energized, resistance across the contactor main posts
should be infinite ohms.
6. With voltage removed from all contactor posts, measure resistance across
the contactor coil posts. Resistance of the coil should be approximately
18.6 ohms.
7. With voltage removed from all contactor posts, measure resistance across
the contactor main posts. Resistance should be infinite ohms.
8. If testing determines that contactor is faulty, replace contactor.
9. After testing, connect harness electrical connectors to contactor. Secure
main post connectors with flange nuts and tighten nuts from 12 to 17 N·m (9
to 13 ft−lb).
10. Turn the battery−disconnect switch to the ON position before returning the
machine to service.
1
3
Figure 230
3. Coil posts
Page 6–90
2
Groundsmaster ® 5900 & 5910
16227SL Rev B