Temperature Sender
The temperature sender is located near the alternator
onthe water flange attached to theengine cylinder head
(Fig. 44). There is a gray wire attached to the terminal
of the sender.
OIL TEMP
TEMP SENDER RESISTANCE
460 ohms (approximate)
140 ohms (approximate)
54 to 78 ohms
100
oF (38oC)
160oF (71oC)
200
oF (93oC)
The resistance of the temperature sender reduces as
the engine coolant temperature increases. The chang-
ing resistance of the temperature sender signals the
console temperature gauge to indicate engine coolant
temperature during machine operation.
221
oF (105oC)
50 ohms (approximate)
5.
Install sender to the water flange.
A. Clean threads of water flange and sender thor-
oughly. Apply thread sealant to the threads of the
sender.
Temperature Sender Test
1.
Park machine on a level surface, lower cutting
B. Screw sender into the water flange. Torquesend-
er from 16 to 20 ft--lb (21.7 to 27.1 N--m).
decks, stop engine, apply parking brake and remove
key from ignition switch. Open hood to gain access to
engine.
C. Connect gray wire to sender. Apply skin--over
grease (Toro Part No. 505--47) to sender terminal.
CAUTION
6.
Fill engine cooling system.
Make sure engine is cool before removing the
temperature sender from engine.
1
2.
temperature sender from water flange.
Lower coolant level in the engine and remove the
3.
Put sender in a container of oil with a thermometer
and slowly heat the oil (Fig. 45).
CAUTION
2
Handle the hot oil with extreme care to prevent
personal injury or fire.
Figure 44
NOTE: Prior to taking resistance readings with a digital
multi meter,short themeter testleadstogether.Theme-
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
fromfromthemeasured valueofthecomponent youare
testing.
1.
Temperature sender
2.
Alternator
4.
(ohms setting) as the temperature increases. Replace
sender if specifications are not met.
Check resistance of the sender with a multimeter
Figure 45
Groundsmaster 4500--D/4700--D
Page 5 -- 31
Electrical System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 30857, Toro Groundsmaster 30858, Toro Groundsmaster 4500 D, Toro Groundsmaster 4700 D |
| Download File |
|
| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
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| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
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