High Temperature Shutdown Switch
The high temperature shutdown switch is located on the
water pump housing (Fig. 29). The high temperature
5. Replace shutdown switch if specifications are not
met.
shutdown switch is normally open and closes when en-
gine coolant temperature reaches approximately 240oF
6.
the engine housing.
After testing is complete, install shutdown switch to
(115
oC). When excessive engine coolant temperature
causes the shutdown switch to close, the engine shuts
down. There is a blue/white wire attached to the shut-
down switch.
A. Clean threads of housing and switch thoroughly.
Apply thread sealant to the threads of the switch.
B. Thread switch into the housing. Torque switch
from 22 to 28 ft–lb (29.4 to 39.2 N–m).
The Standard Control Module (SCM) monitors the op-
eration of the high temperature shutdown switch. If ex-
cessive engine coolant temperature causes the high
temperature shutdown switch to close, the High Tem-
perature Shutdown LED on the SCM will be illuminated.
The switch and its circuit wiring should be tested using
the SCM before performing the following testing proce-
dure.
C. Reconnect harness wire to shutdown switch.
7.
8.
Fill engine cooling system.
Lower and secure hood.
Testing
1.
Park machine on a level surface, lower cutting deck
(or implement), stop engine, apply parking brake and re-
move key from ignition switch. Open hood to gain ac-
cess to engine.
1
CAUTION
Make sure engine is cool before removing the
high temperature shutdown switch from engine.
Do not open radiator cap or drain coolant if the
radiator or engine is hot. Pressurized, hot cool-
ant can escape and cause burns.
Figure 29
High temperature shutdown switch
1.
2.
Lower the coolant level in the engine and remove the
high temperature shutdown switch from the engine.
3.
thermometer and slowly heat the oil (Fig. 30).
Put the end of the switch in a container of oil with a
CAUTION
Handle the hot oil with extreme care to prevent
personal injury or fire.
Figure 30
4.
(ohms setting) as the oil temperature increases. The
Check resistance of the switch with a multimeter
high temperature shutdown switch is normally open and
should close from 234o to 244oF (112o to 118oC).
Groundsmaster 7200/7210
Page 5 – 23
Electrical System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 7200, Toro Groundsmaster 7210 |
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|
| 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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My mower is a TORO 7210.
Start fuse defection. Why ?