Operator's Manual

CheckingtheInterlock
Switches
ServiceInterval:Beforeeachuseordaily
Thepurposeoftheinterlockswitchesistopreventthe
enginefromcrankingorstartingunlessthetraction
pedalisintheNEUTRALposition,theEnable/Disable
switchisintheDISABLEposition,andtheLower
Mow/RaisecontrolisintheNEUTRALposition.In
addition,theengineshouldshutoffwhenyoupress
thetractionpedalwithnooneintheseatorifthe
parkingbrakeisengaged.
CAUTION
Ifsafetyinterlockswitchesaredisconnected
ordamaged,themachinecouldoperate
unexpectedly,causingpersonalinjury.
•Donottamperwiththeinterlockswitches.
•Checktheoperationoftheinterlock
switchesdailyandreplaceanydamaged
switchesbeforeoperatingthemachine.
VerifyingtheInterlockSwitch
Function
1.Parkthemachineonalevelsurface,lowerthe
cuttingunits,engagetheparkingbrake,and
shutofftheengine.
2.Removethecoverfromthecontrolpanel.
3.Locatethewireharnessandloop-back
connector(Figure36).
g020260
Figure36
1.Loop-backconnector
4.Carefullyunplugtheloop-backconnectorfrom
theharnessconnector.
5.ConnecttheDiagnosticACEdisplayconnector
totheharnessconnector(Figure37).
Note:Ensurethatthecorrectoverlaydecalis
positionedontheDiagnosticACEdisplay.
g004140
Figure37
1.DiagnosticACE
6.TurnthekeyswitchtotheONposition,butdo
notstartthemachine.
Note:Theredtextontheoverlaydecalrefers
toinputswitchesandthegreentextrefersto
outputs.
7.The“inputsdisplayed”LED,onthelowerright
columnoftheDiagnosticACE,shouldbe
illuminated.Ifthe“outputsdisplayed”LED
isilluminated,pressthetogglebutton,on
DiagnosticACE,tochangeLEDto“inputs
displayed.”
TheDiagnosticACEilluminatestheLED
associatedwitheachoftheinputswhenthat
inputswitchisclosed.
8.Individually,changeeachoftheswitchesfrom
opentoclosed(i.e.,sitontheseat,engage
thetractionpedal,etc.),andnotethatthe
appropriateLEDontheDiagnosticACEblinks
onandoffwhenthecorrespondingswitchis
closed.Repeatthisforallswitchesthatyoucan
changebyhand.
9.Ifaswitchisclosedandtheappropriate
LEDdoesnotturnon,checkallwiringand
connectionstotheswitchand/orcheckthe
switcheswithanohmmeterormultimeter.
Replaceanymalfunctioningswitchesandrepair
anymalfunctioningwiring.
Note:TheDiagnosticACEalsohastheability
todetectwhichoutputsolenoidsorrelaysare
turnedon.Thisisaquickwaytodetermineifa
machinemalfunctioniselectricalorhydraulic.
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