Temperature Sender - Toro Multi Pro 5800 Service Manual

Temperature Sender

The temperature sender is located near the alternator
on the water flange attached to the engine cylinder head
(Fig. 41). There is a blue wire attached to the terminal of
the sender.
Testing
1. Lower coolant level in the engine and remove the
temperature sender from water flange.
2. Put sender in a container of oil with a thermometer
and slowly heat the oil (Fig. 42).
CAUTION
Handle the hot oil with extreme care to prevent
personal injury or fire.
NOTE: Prior to taking resistance readings with a digital
multimeter, short the meter test leads together. The me-
ter will display a small resistance value (usually 0.5
ohms or less). This resistance is due to the internal re-
sistance of the meter and test leads. Subtract this value
from from the measured value of the temperature send-
er you are testing.
3. Check resistance of the sender with a multimeter
(ohms setting) as the oil temperature increases. The
temperature sender is normally open and should close
o o
between 216 to 226 F (102
4. Allow oil to cool while observing temperature. The
temperature sender should open at approximately 208
o
F (98 C).
5. Replace sender if specifications are not met.
6. After testing, install temperature sender to the water
flange.
A. Clean threads of water flange and sender thor-
oughly. Apply thread sealant to the threads of the
sender.
B. Tighten sender into the water flange.
C. Reconnect blue wire to sender.
7. Fill engine cooling system.
Electrical System
o o
to 108 C).
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1. Temperature sender
o
1
Figure 41
Figure 42
Multi Pro 5800