Mack CSM 2010 - Page 115

OPERATION107
SwitchtheMACKPowerLeash™EngineBraketotheHIGHposition,andnowitis
possibletodescendthesamegradeinsixthgeartomaintainasteady56kph(35mph)at
2,000enginerpm.
CAUTION
Themaximumallowableenginespeed
islistedontheWarninglabelonthesun
visor.DoNOTexceedthemaximum
allowableenginespeed.
C0032890
Inanygearselectionhigherthansixthgear(inthisexample),itwouldbenecessary
tooccasionallyapplytheservicebrakestomaintainasafevehiclespeedandtoavoid
overspeedingtheengine.
DANGER
Aswithanyvehicle,regularandexcessive
applicationoftheservicebrakesduringa
downhilldescentcanleadtoabrakelining
overheatcondition,resultinginavery
dangerouslossofservicebrakeretarding
capability.
Note:Thepreviousguresapplyonlytothishypotheticalexample.Specicvehiclecontrol
speedsandenginespeedsforagivendescentaredependentupontheactualvehicleand
enginecongurations,thegrossweightofthevehicle,andthepercentgradeoftheroad.