Testing(continued)
g288535
Figure230
1.Contactor3.Coilposts
2.Mainposts
4.Usingjumperwires,apply12VDCdirectlyacrossthecontactorcoilposts
(Figure230).Thecontactorshouldclick.Withthecontactorcoilenergized,
resistanceacrossthecontactormainpostsshouldbelessthan1ohm.
5.Removevoltagefromcontactorcoilposts.Thecontactorshouldclick.With
thecontactorcoilnotenergized,resistanceacrossthecontactormainposts
shouldbeinniteohms.
6.Withvoltageremovedfromallcontactorposts,measureresistanceacross
thecontactorcoilposts.Resistanceofthecoilshouldbeapproximately
18.6ohms.
7.Withvoltageremovedfromallcontactorposts,measureresistanceacross
thecontactormainposts.Resistanceshouldbeinniteohms.
8.Iftestingdeterminesthatcontactorisfaulty,replacecontactor.
9.Aftertesting,connectharnesselectricalconnectorstocontactor.Secure
mainpostconnectorswithangenutsandtightennutsfrom12to17N·m(9
to13ft−lb).
10.Turnthebattery−disconnectswitchtotheONpositionbeforereturningthe
machinetoservice.
ElectricalSystem:ComponentTesting
Page6–90
Groundsmaster
®
5900&5910
16227SLRevB
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