Toro Groundsmaster 7210 - Diode Assemblies

DiodeAssemblies
SeveralidenticaldiodesareusedontheGroundsmaster7210machines.The
maximumcurrentallowedthroughanyofthediodesis6A.Thediodeassemblies
canbeidentiedbyablackcolor,diodesymbol,andT oroPartNumberonthe
endofthediodeassemblybody(Figure161).
Adiodeassemblyisusedforcircuitprotectionfromthevoltagespikesthatoccur
whentheenginestartersolenoidisde-energized.Thisdiodeplugsintothe
enginewireharnessnearthefuelwaterseparator;refertotheEngineWire
HarnessDrawinginAppendixA—FoldoutDrawings.
AdiodeassemblyisusedtoprotecttheengineECUfromreversepolarityin
theEGRrelaycircuit.Thisdiodeplugsintotheenginewireharnessnearthe
YanmarengineECU;refertotheEngineWireHarnessDrawinginAppendix
A—FoldoutDrawings.
AdiodeassemblyisusedtoprotecttheengineECUfromreversepolarityin
thealternatorcircuit.Thisdiodeplugsintotheenginewireharnessnearthe
YanmarengineECU;refertotheEngineWireHarnessDrawinginAppendix
A—FoldoutDrawings.
AdiodeassemblyisusedtoprotectthePTOcircuitfromthevoltagespikesthat
occurwhenthePTOswitchisengaged.Thisdiodeplugsintothemachinewire
harnessbelowtheoperatorseat;refertothePlatformWireHarnessDrawingin
AppendixA—FoldoutDrawings.
Adiodeintheraise/lowercircuitisusedforcircuitlogic.Whentheliftswitchis
pressedtoraise,thisdiodeallowsbothliftmanifoldsolenoidstobeenergized.
Whentheliftswitchispressedtolower,thisdiodepreventsthesolenoidmarked
Bintheschematicfrombeingenergized.Thisdiodeplugsintothemachinewire
harnessbelowtheoperatorseat;refertothePlatformWireHarnessDrawingin
AppendixA—FoldoutDrawings.
Intheoptionalrearliftkit,4diodesareusedforcircuitlogic.
Intheoptionaldebrisblowerkit,adiodeisusedtopreventvoltagespikeswhen
thehydraulicsolenoidvalveinthekitisde-energized.
TestingtheDiodeAssembly
g034714
Figure161
1.Endofthediodebody
3.Maleterminal
2.Diodeassembly4.Femaleterminal
ThediodeshowninFigure161canbetestedbyusingadigitalmultimeter(diode
testorohmssetting);refertoDiodeTestT able(page5–38).
Groundsmaster7210
Page5–37
ElectricalSystem:TestingtheElectricalComponents
16222SLRevC