Toro 75305 - Electric PTO Clutch

Note:NOTE:TheenginewillnotcrankoverwhenthePTOswitchisinthe
ONposition.
ThePTOswitchprovidesbatteryvoltagefromtheignitionswitchtotheparking
brakeswitchandtheneutralswitchesaspartofthesafetyinterlocksystem.
PTOSwitchTesting
1.Removethecontrolpanelfromtherightconsole.
2.DisconnectthePTOswitchfromthewireharness.
3.WiththeswitchintheONposition(buttonpulledOUT).
4.Usingadigitalmulti-metersettotheOHMorContinuitysetting,verifythe
following:
•Pin2and5shouldhavecontinuity(closed)
•Pin1and4shouldhavecontinuity(closed)
•Pin1and7shouldNOThavecontinuity(open)
•Pin2and8shouldNOThavecontinuity(open)
g331212
Figure93
5.WiththeswitchintheOFFposition(buttonpushedIN)
•Pin1and7shouldhavecontinuity(closed)
•Pin2and8shouldhavecontinuity(closed)
•Pin1and4shouldNOThavecontinuity(open)
•Pin2and5shouldNOThavecontinuity(open)
ElectricPTOClutch
ThePTOclutchelectronicallycontrolstheengagementanddisengagement
ofthePTOpulley(deckbelt).
ThePTOclutchiscomposedofthreemajorcomponents:
•Coil
•Clutchplate
•Frictionplate
Theclutchplatealwaysturnswiththeengine(crankshaft).Theeldisacoilof
wireonanironcorewhichbecomesanelectromagnetwhenpowerisapplied.
Thefrictionplateistheonlypiecethatmovesverticallyonthecrankshaft.Itis
normallyspringloadedsothatitisnotincontactwiththeclutchplateandis
TitanServiceManual
Page8–9
Electrical:ServiceandRepairs
3438-774RevA