Toro Groundsmaster 4500-D Series Service Manual page 337

Solenoid Coil Testing (continued)
Groundsmaster ® 4500-D/4700-D
19245SL Rev A
2
3
g276033
1. Solenoid coil
2. O−ring
3. Using a multimeter (ohms setting), measure resistance between the two (2)
connector terminals on the solenoid coil. Solenoid coil resistance should be
3.66 ohms.
Note: Solenoid coil resistance should be measured with solenoid at
approximately 20 ºC (68 ºF). 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).
4. If solenoid coil resistance is incorrect, replace coil:
A. Use a 12 point, 26 mm socket to loosen and remove the coil nut that
secures solenoid coil.
B. Slide solenoid coil and O−rings from valve stem. Clean all corrosion or
dirt from the valve.
C. Slide new coil with O−rings onto the solenoid stem.
D. Use a 12 point, 26 mm socket to install and torque coil nut to 5 N·m (44
in−lb) (do not over tighten).
5. After testing is completed, connect wire harness connector to the solenoid
coil.
1
2
Figure 217
3. Coil nut
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Electrical System: Component Testing