Toro Groundsmaster 5900 Series - Traction Pedal Position Sensor

TractionPedalPositionSensor
1
2
g288612
Figure266
1.Tractionpedal2.Tractionpedalpositionsensor
Thetractionpedalpositionsensorisconnectedtothetractionpedalassembly
(Figure266).Thissensordeterminestheneutralbandforthetractionpedal,the
directionoftraveldesiredbytheoperatorandthetractionspeed.Thesensor
isasingleanalog,dualdigitalsignalelectronicdevice.Thesensorincludesa
potentiometer(variableresistor)thatprovidesananalogsignalforthemaster
controllertodeterminethedesiredgroundspeedbasedonhowfarthetraction
pedalisdepressedineitherdirection.Thetractionpedalpositionsensor
alsohousestwo(2)switchesthatareusedtodeterminetheneutralposition
(dead−band)andtheindicateddirectionoftravel(forwardorreverse).
Asthetractionpedalisdepressed,theappropriatepositionsensorswitch
closesandsendsadigitalsignaltothemastercontrollercontrollertodetermine
machinedirectionandtheinternalwiperofthepotentiometermovesandsends
theanalogsignaltothemastercontrollercontrollertodeterminemachine
speed.Thetractionpedalpositionsensormustbecalibratedwiththemaster
controllertodeterminetheneutralandfullspeedsetpointsforboththeforward
andreversedirections.
Aproperlyinstalledandcalibratedtractionpedalpositionsensoriscriticalto
accuratetractionresponseandpositionsensorlife.Usecarewheninstallingand
calibratingthetractionpedalpositionsensor.
Testing
1.Inspecttractionpedalassemblyforloose,damagedorworncomponents
(seeTractionPedal(page7–37)).
2.Calibratethetractionpedalpositionsensorandtestmachineoperation(see
TractionPedalPositionSensorCalibration(page6–51)).
3.Ifthetractionpedalpositionsensorcontinuestoperformpoorly,checkthe
wireharness(seeAppendixA(pageA–1)).
4.Replacepositionsensorifnecessary(seeTractionPedal(page7–37)).
Groundsmaster
®
5900&5910
Page6–123
ElectricalSystem:ComponentTesting
16227SLRevB