Toro ProLine H800 - Page 234

TestingtheOilPressureSwitch(continued)
1.Parkthemachineonalevelsurface,lowerthecuttingdeck,setthekey
switchtotheOFFpositionandremovethekeyfromthekeyswitch.
2.Locatetheengineoilpressureswitchontheengineanddisconnectthe
wireharnessconnectorfromtheswitch.Checktheswitchandtheharness
connectorfordamageorcorrosionandcleanorrepairasnecessary.
3.Connectamultimeter(ohmssetting)tocheckthecontinuityoftheswitch:
A.Withtheengineoff,theoilpressureswitchshouldbeclosedsothere
shouldbecontinuitybetweentheswitchterminalandthemetalswitch
body.
B.Withtheenginerunning,theoilpressureswitchshouldbeopensothere
shouldnotbecontinuitybetweentheswitchterminalandthemetalswitch
body.
4.Replacetheswitchiftestingdeterminesthattheswitchisdamaged.
5.Iftheswitchtestscorrectlyandacircuitproblemstillexists,checkthe
machinewireharness;refertoAppendixA(pageA–1).
6.Aftertesting,connecttheenginewireharnesstotheswitchbeforereturning
themachinetoservice.
ElectricalSystem:TestingtheElectricalComponents
Page6–34
ProLineH800
19241SLRevB