Toro Reelmaster 3100-D - High Temperature Warning Switch Testing

HighTemperatureWarningSwitch
g342502
Figure130
1.Temp.warningswitch
2.Rearlifttab
Thehightemperaturewarningswitch(Figure130)isattachedtothewaterpump
housingontheengineandhasagraywireattachedtoit.Thisswitchisnormally
openandcloseswhentheenginecoolanttemperaturereachesapproximately
105°C(220°F).Theclosedswitchcausesthehightemperaturewarninglighton
theconsoletoilluminateandalsoprovidesaninputtotheStandardControl
Module(SCM).
ThisinputcausestheSCMhightemperaturewarningLEDtoilluminateand
thecuttingunittoshutdown.Thehightemperaturewarningswitchandcircuit
wiringshouldbetestedasaSCMinputbeforeperformingthefollowingtesting
procedure.
Testing
1.Parkthemachineonalevelsurface,lowerthecuttingdeck,shutoffthe
engine,settheparkingbrake,andremovethekeyfromthekeyswitch.
2.Unlatchthehoodandraiseit.
DANGER
Iftheradiatororengineishot,pressurizedhotcoolantcanescape
andcauseburns.
Donotopentheradiatorcapordraintheradiatorwhenthecoolant
ishot.Ensurethattheengineiscoolbeforeremovingthehigh
temperaturewarningswitchfromtheengine.
3.Lowerthecoolantlevelintheengine.
4.Removethewireharnessconnectorfromthehightemperaturewarning
switch,andremovetheswitchfromtheengine.
Reelmaster
®
3100-D/3105-D
Page6–29
ElectricalSystem:ComponentTesting
20252SLRevA