Toro Reelmaster 3100-D - High Temperature Shutdown Switch Testing

HighTemperatureShutdownSwitch
g342503
Figure132
1.Temp.shutdownswitch3.Lowoilpress.switch
2.Alternator
Thehightemperatureshutdownswitch(Figure132)isattachedtothewater
pumphousingontheengineandhasablue/whitewireattachedtoit.This
switchisnormallyopenandcloseswhenenginecoolanttemperaturereaches
approximately110°C(230°F).Theclosedswitchprovidesaninputtothe
StandardControlModule(SCM).
ThisinputcausestheSCMhightemperatureshutdownLEDtoilluminateand
thecuttingdecktoshutdown.Thehightemperatureshutdownswitchand
circuitwiringshouldbetestedasaSCMinputbeforeperformingthefollowing
testingprocedure.
Testing
1.Parkthemachineonalevelsurface,lowerthecuttingdeck,shutoffthe
engine,settheparkingbrake,andremovethekeyfromthekeyswitch.
2.Unlatchthehoodandraiseit.
DANGER
Iftheradiatororengineishot,pressurizedhotcoolantcanescape
andcauseburns.
Donotopentheradiatorcapordraintheradiatorwhenthecoolant
ishot.Ensurethattheengineiscoolbeforeremovingthehigh
temperatureshutdownswitchfromtheengine.
3.Lowerthecoolantlevelintheengine.
4.Removethewireharnessconnectorfromthehightemperatureshutdown
switch,andremovetheswitchfromtheengine.
Reelmaster
®
3100-D/3105-D
Page6–31
ElectricalSystem:ComponentTesting
20252SLRevA