Toro Groundmaster Series - Parking Brake Switch

ParkingBrakeSwitch
g306071
Figure90
POSITIONCLOSED
CIRCUITS
ENGAGED(brake
leverup)
1+3
DISENGAGED
(brakelever
down)
1+2
Theparkingbrakeswitchislocatedunderthebrakelevercoverontheleftside
ofthebrakelever.Asetofnormallyclosedcontactsintheswitchareopened
whentheparkingbrakeisdisengaged(brakeleverdown).Onlytwo(2)ofthe
switchterminalsareusedintheparkingbrakeswitchcircuit.
TheTDMdisplay/controllermonitorsthepositionoftheparkingbrakeswitch.
Theparkingbrakeswitchispartofthemachinesafetyinterlocksystem.Using
theparkingbrakeswitchposition(openorclosed)andavarietyofotherinputs,
theTDMdisplay/controllermanagesavarietyofmachinefunctions.
TestingtheParkingBrakeSwitch
TheparkingbrakeswitchanditscircuitwiringcanbetestedusingtheTDM
display/controllermaininformationscreens(brakeicon);refertoUsingthe
TDMDisplay/ControllerScreensforTroubleshooting(page3–12).Iftesting
determinesthattheswitchandcircuitwiringarenotfunctioningcorrectly,
proceedwiththefollowingtestprocedure:
1.Parkthemachineonalevelsurface,lowerthecuttingunit(orattachment),
engagetheparkingbrake,setthekeyswitchtotheOFFpositionandremove
thekeyfromthekeyswitch.
2.Removethe4panelfastenersandremovetheparkingbrakelevercover
fromthemachine.
3.Disconnectthemachinewireharnessfromtheswitch.Checktheswitch
andtheharnessconnectorfordamageorcorrosionandcleanorrepair
ifnecessary.
4.Useamultimeter(ohmssetting)todeterminewhethercontinuityexists
betweenthevariousterminalsforeachswitchposition.
ElectricalSystem:TestingtheElectricalComponents
Page6–32
Groundsmaster
®
3200,3300and3310
19240SLRevA