Toro Groundsmaster 5900 Series - Page 367

HydraulicSolenoidValves
TherearenumerouscoilactuatedhydraulicsolenoidvalveontheGroundsmaster
hydraulicmanifolds.Whenthecoilsareenergized,hydraulicvalveshiftoccursto
controlhydraulicow.
Note:Afaultysolenoidcoilorsolenoidcircuitwiringproblemwillnotbeidentied
bytheInfoCenterDisplay.TheInfoCenterDisplaycanbeusedtoverifythat
outputcurrentfromtheappropriateTECisavailableforthesolenoidcoilbut
theDisplaywillnotverifythatthesolenoidcoilandcircuitwiringisfunctioning
correctly(seeInfoCenterDisplay(page6–9)).
Testing
Testingsolenoidcoilscanbedonewithoutremovingthecoilorhydraulicvalve
asfollows:
1.Locatethesolenoidvalvecoiltobetestedanddisconnectthewireharness
electricalconnectorfromthecoil.
Note:Priortotakingsmallresistancereadingswithadigitalmultimeter,short
themetertestleadstogether.Themetermaydisplayasmallresistance
value(usually0.5ohmsorless).Thisresistanceisduetotheinternal
resistanceofthemeterandtestleads.Subtractthisvaluefromthemeasured
valueofthecomponentyouaretesting.
3
4 5
1
2
6
7
8
9
10
11
g288589
Figure248
1.Steering/Liftmanifold7.SolenoidvalveS7
2.SolenoidvalveS88.SolenoidvalveS6
3.SolenoidvalveS19.SolenoidvalveS9
4.SolenoidvalveS310.SolenoidvalveS5
5.SolenoidvalveS211.SolenoidvalveS10
6.SolenoidvalveS4
Groundsmaster
®
5900&5910
Page6–105
ElectricalSystem:ComponentTesting
16227SLRevB