Toro Z Master 4000 Series - Page 105

ElectricPTOClutchInstallation(continued)
5.Lowertheunitandverifyproperfunction.
CoilResistanceMeasurementTest
IfthePTOclutchisnotengagingorissuspectasacauseofelectricalproblems,
usethefollowingelectricaltroubleshootingsteps.Theseprocedureswillhelp
determineiftheclutchhasfailedasaresultoforisthecauseofanelectrical
problem.
1.ParkthemachineonalevelsurfaceanddisengagethePTO.Stopthe
engine,waitforallmovingpartstostopandremovethekey.Engagethe
parkingbrake.
2.Disconnecttheclutchwireconnector.
3.Setthemulti-metertomeasureresistance(OHMssetting).
4.Connectthemeterleadwirestotheterminalsintheclutchconnector.
5.SeethePTOClutchElectricalSpecicationschart.
PTOClutchElectricalSpecicationChart
Resistance(OHMs)
AMPDraw
ContinuitytoGroundClutch
2.29±5%
5.24
OPEN
116–1947
1.84±5%
6.53
OPEN
116–1620
PTOClutchContinuitytoGroundCheckTest
1.ParkthemachineonalevelsurfaceanddisengagethePTO.Stopthe
engine,waitforallmovingpartstostopandremovethekey.Engagethe
parkingbrake.
2.Disconnecttheclutchwireconnector.
3.Setthemulti-metertomeasureresistance(OHMsetting).
4.Connectonemulti-meterleadtotheengine,chassisorbatteryground.
Connecttheothermulti-meterleadtoeachoftheclutchconnectorterminals.
5.Theclutchconnectorterminalsshouldneverhavecontinuitytogroundand
shouldbeOPENatalltimes.
6.IfcontinuityisfoundbetweenthePTOconnectorandground,thePTOclutch
andthePTOswitchmustbereplaced.
g336410
Figure88
4000SeriesZMASTER®ServiceManual
Page8–11
Electrical:ServiceandRepairs
3442-427RevA