Toro Sand Pro 3040 - Diode Assemblies

DiodeAssemblies
g354337
Figure86
1.Startersolenoid
3.MainwireharnessdiodeD2
5.Optionalrearremotehydraulicswire
harnessdiodeD1
2.MainwireharnessdiodeD1
4.Optionalrearremotehydraulicskit
relay
Twodiodesplugintothemainwireharnessbelowtherightsideframerailnear
thestartersolenoid.Thesediodes(D1andD2)providelogicfortheinterlock
system.Onediodeplugsintotheoptionalrearremotehydraulicskitwireharness
undertheleftrearwheelshroudneartherearremotehydraulicskitrelay.This
diode(D1)providescircuitprotectionformtherearremotehydraulicssolenoid
valvecoil.Thediodescanbeidentiedbytheirblackcoloranddiodesymbol
ontheendofthediodebody.Themaximumcurrentallowedthroughanyof
thediodesis6amps.
TestingtheDiodeAssemblies
1.Parkthemachineonalevelsurface,loweranyattachments,engagethe
parkingbrake,setthekeyswitchtotheOFFpositionandremovethekey
fromtheswitch.
2.Locateandremovethediodefromthewireharness.Checkthediodeand
thediodeholderfordamageorcorrosionandcleanorrepairifnecessary.
3.Useamultimetertocheckforvoltagedropacrossthediodeterminals(diode
testsetting).Contactthemultimeterred(+)leadtodiodeterminalAandthe
black(−)leadtodiodeterminalB.Areadingoflessthan0.7voltsshouldbe
displayedonthemultimeter.
OR
Usethetableprovidedandamultimeter(ohmssetting)tomeasurethe
resistanceacrossthediodeterminals.
SandPro
®
3040and5040
Page6–21
ElectricalSystem:TestingtheElectricalComponents
20251SLRevA