Contactors - Toro Groundsmaster 5900 Series Service Manual

Contactors

Testing
Groundsmaster ® 5900 & 5910
16227SL Rev B
g288534
1. 12 volt battery
2. 24 Volt cooling fan contactor
A contactor is used on all Groundsmaster 5900 and 5910 machines to provide
current to the 24 volt cooling fans. The contactor is attached to the rear power
center in the right rear corner of the engine compartment
contactor is energized by the master controller when the key switch is in the
START or RUN position.
An additional contactor is used on all Groundsmaster 5910 machines to provide
current to the cab mounted electrical components. The contactor is attached to
the rear power center in the right rear corner of the engine compartment
229). The contactor is energized when the key switch is in the START or RUN
position.
1. Make sure key switch is OFF. Remove key from key switch.
2. Turn battery−disconnect switch to the OFF position.
3. Record wire connector locations on contactor being tested for assembly
purposes. Disconnect all harness electrical connectors from contactor.
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) that is due to the internal resistance of the
meter and test leads. Subtract this value from the measured value of the
component you are testing.
2
4.5 to 5.6 N·m
(40 to 50 in-lb)
1
Figure 229
3. Cab component contactor
Page 6–89
3
(Figure 229). The
Electrical System: Component Testing
(Figure