Mack CSM 2010 - On Slippery Road Surfaces

108OPERATION
OnSlipperyRoadSurfaces
Aswithmanyaspectsofoperatingaheavy-dutyvehicle,specialcareshouldbetakenwhen
usingtheMACKPowerLeash™EngineBrakeonslipperyroadsurfaces.Thepotentialfor
unpredictablelossofvehicletractionisaseriousconcern;insomesituationstheengine
shouldnotbeusedatall.
Asalways,approachuntesteddrivingconditionswithcaution.AvoiduseoftheMACK
PowerLeash™EngineBrakeinthesesituationsuntilyouhavegainedsomeexperience
undernormaldrivingconditions.
Asarule,makesurethatthevehicleisdemonstratinggoodtractabilitywiththeenginebrake
offbeforecheckingfortractabilitywiththeenginebrakeenabled.Then,providedtrafc
conditionsaresafefor"testing"tractability,switchtheMACKPowerLeash™EngineBrake
totheLOWposition.Ifthevehicleshowsanysignsoflossofcontrol(ABSactivationor
vehicleswerving,forexample),immediatelyswitchtheenginebrakebacktotheOFF
position.
C0032891
OnlyifthevehicledemonstratesgoodcontrolintheLOWposition(again,onlyinsafe
drivingconditions)shouldyoutestintheHIGHposition,ifdesired.ReturntotheLOW
positionandproceedwithcautionifthereisanysignoflossvehiclecontrol.
Note:Alwaysmonitorvehicletractabilityinslipperyroadconditions,andmakeadjustments
toenginebrakeswitchpositionandvehiclespeedasnecessary.AlwaystesttheLOWpower
positionsettingbeforemovingtotheHIGHposition.
CAUTION
DonotenabletheMACKPowerLeash™
EngineBrakeduringbobtailoperations,or
whenoperatingonslipperyroadswithan
emptyorlightlyloadedtrailer.