Toro Groundsmaster 360 - Page 328

coil(Figure234).RefertoSolenoidValveCoilSpecicationsT able(page5–92).
Testingofthecoilscanbedonewiththecoilinstalledonthehydraulicvalve.
TestingtheHydraulicSolenoidValveCoils
Note:Beforeyoudisconnectthesolenoidvalvecoils,testthesolenoidsand
theircircuitwiringasTECoutputswiththeInfoCenterdisplay;refertoUsingthe
InfoCenterDisplayforTroubleshooting(page5–30).IftheInfoCenterveries
thatthesolenoidcoilsandcircuitwiringarefunctioningcorrectly,thennomore
testingisnecessary.
1.Parkthemachineonalevelsurface,lowerthecuttingdeck,shutoffthe
engine,settheparkingbrake,andremovethekeyfromthekeyswitch.
2.Raiseandsupporttheoperatorseattogetaccesstothecontrolmanifolds
andsolenoidcoils.
3.Locatethehydraulicsolenoidvalvecoilthatistobetested(Figure233).
Disconnectthewireharnessconnectorfromthecoil.
4.Identifytheheightanddiameterofthecoilthatyouaretesting.
Note:Beforetakingthesmallresistancereadingswithadigitalmultimeter,
shortthemultimetertestleadstogether.Themultimeterdisplaysasmall
resistancevalue(usually0.5ohmsorless).Thisresistanceisbecauseofthe
internalresistanceofthemultimeterandtestleads.Subtractthisvaluefrom
themeasuredvalueofthecomponentthatyouaretesting.
Note:Thesolenoidcoilresistanceshouldbemeasuredwithsolenoidat
approximately20°C(68°F).Resistancemaybeslightlydifferentthanlisted
atdifferenttemperatures.Typically,adamagedsolenoidcoilwilleitherbe
shorted(verylowornoresistance)oropen(inniteresistance).
5.Useamultimeter(ohmssetting),measuretheresistancebetweenthe2
connectorterminalsonthesolenoidcoil.Theresistanceforthesolenoidcoils
isidentiedintheSolenoidValveCoilSpecicationsTable(page5–92).
SolenoidValveCoilSpecicationsTable
SolenoidValveCoil
DiameterHeightResistance
DeckliftmanifoldS235.8mm(1.41inches)36.3mm(1.43inches)
8.8ohms
DeckliftmanifoldS146.7mm(1.84inches)49.9mm(1.96inches)
7.1ohms
Steeringselector
manifold
46.7mm(1.84inches)49.9mm(1.96inches)
7.1ohms
6.Ifthesolenoidcoilresistanceisincorrect,replacethesolenoidcoil;referto
HydraulicSolenoidValveCoils(page5–106).
7.Aftertestingthecoils,connectthewireharnesselectricalconnectortothe
solenoidvalvecoil.
8.Lowerandsecuretheoperatorseat.
ElectricalSystem:TestingtheElectricalComponents
Page5–92
Groundsmaster360
16225SLRevC