Mack CSM 2010 - Engine Speed Control

114OPERATION
EngineSpeedControl
EngineSpeedControlOperation
Thevehiclemanagementandcontrol(V-MAC)IVsystemalsoallowstheoperatortoset
andmaintainincreasedenginespeeds.Thesystemprovidestwodifferentspeedcontrol
functions:ElectronicHandThrottlecontrolandPTOcontrol.electronichandthrottle(EHT)
controlsenginespeedwhenPTOisnotengaged.
Bothsystemsallowtwomodesofcontrol:
1SingleSpeedControl(SSC)increasestheengineRPMtoaspeedpreprogrammedintothe
systemmemory.ThismodeisintendedforoperationofthePTOatmaximumefciency.
2VariableSpeedControl(VSC)allowsthedrivertosetanyengineRPMwithinthe
preprogrammedlowandhighlimitssetinthesystemmemory.Thismodeisprimarily
intendedforgeneralPTOapplicationsandenginewarm-up.
Note:Brakeconditionsarecongurable,
butthestandardsettingisparkbrakeonand
servicebrakeofftoengage.
SingleSpeedControl(SSC)
Tousesinglespeedcontrolfunctions,thefollowingconditionsmustbemet:
1Forpowertakeoff(PTO)operation,thePTOmustbeengaged.Forelectronichand
throttle(EHT)operation,theservicebrakemustbeOFF.
2Theclutchmustbeengaged(notpressed).
ToactivateSSC,movetheSpeedControlswitchtotheONposition,thenpressandrelease
theSETswitch.Theenginespeed(RPM)willjumptothepreprogrammedspeed.SSCcan
alsobeprogrammedforAutoSetmode.Whenenabled,simplymovetheSpeedControl
switchtotheONpositionandengagethePTOoractivateacustomer-denedswitch(usually
settingtheparkbrake).Enginespeedwillgotothepreprogrammedspeed.