Toro Groundmaster Series - PTO Clutch; Testing the PTO Clutch

PTOClutch
g306981
Figure99
1.PTOclutch
2.Wireharnessconnector
3.Accessslot(3each)
AnelectricclutchisusedtoengagethePTO.Theelectricclutchismountedon
theenginecrankshaftandengageswhencurrentisappliedtotheclutchcoil.
Theclutchalsoincorporatesamagneticbraketostopclutchrotationwhenthe
clutchisde-energized.ForPTOclutchadjustmentinformation,refertoAdjusting
thePTOClutch(page7–4).
TestingthePTOClutch
1.Parkthemachineonalevelsurface,lowerthecuttingunit(orattachment),
engagetheparkingbrake,setthekeyswitchtotheOFFpositionandremove
thekeyfromthekeyswitch.
2.Unplugtheclutchelectricalconnectorfromthemachinewireharness.
Checktheharnessconnectorsfordamageorcorrosionandcleanorrepair
ifnecessary.
Note:Priortotakingsmallresistancereadingswithadigitalmultimeter,short
themetertestleadstogether.Themeterwilldisplayasmallresistancevalue
(usually0.5ohmsorless).Thisresistanceisduetotheinternalresistanceof
themeterandtestleads.Subtractthisvaluefromthemeasuredvalueofthe
componentyouaretestingtoobtainanaccuratereading.
3.Useamultimeter(ohmssetting),checktheclutchcoilresistanceacrossthe
twoclutchconnectorterminals.Thecoilresistanceshouldbeapproximately
2.2ohmswhentestedat20°C(68°F).Checkthatthereisnocontinuity
betweeneitheroftheclutchterminalsandtheclutchframe.
4.Apply12VDCtotheterminalsofthePTOelectricclutch.Thecoilshould
energizeandtheclutchshouldengage.
ElectricalSystem:TestingtheElectricalComponents
Page6–48
Groundsmaster
®
3200,3300and3310
19240SLRevA