INSTRUMENTSANDCONTROLS49
49.mDRIVEControlPanel57.LoadLightSwitch
58.DifferentalLockoutSwitch67.SpeedControlSwitch
59.ParkingBrakeValve
68.WiperSwitch
60.OptionalSwitch*69.OptionalSwitch*
61.TrailerAirSupplyValve70.OptionalSwitch*
62.OptionalSwitch*71.LatchSwitch
63.SuspensionHeightSwitch72.PowerMirrorSwitch
64.OptionalSwitch*73.OptionalSwitch*
65.OptionalSwitch*74.OptionalSwitch*
66.DrivingLightsSwitch75.AUX/USBPort
*Theswitchesshowninparenthesesarelistedintheirlikelypositiononthepanel;
however,theymaybeatotherswitchlocationsdependingonthecustomer’s
requirements.See
“FunctionofOptionalSwitches”,page58foradescriptionofthe
optionalswitches,listedinalphabeticalorder.
1.ManifoldPressureGauge(IfEquipped)–Measuresthechargeairboost
pressureintheintakemanifold.
2.EngineOilPressureGauge–Indicatesengineoilpressure.Thenormal
operatingoilpressureforaMACKMPengine(atgovernedspeed)isbetween275.8
and620.5kPa(40and90psi).Atidlingspeed,theoilpressureshouldbebetween
275.8and413.9kPa(40and60psi).
3.EngineCoolantTemperatureGauge(SCR)–Indicatesthetemperatureofthe
enginecoolant.ThenormaloperatingtemperatureforMACKenginesisbetween
77°Cand107°C(170°Fand225°F).Thedriverwillreceiveawarningifcoolant
temperaturereaches106°C(223°F)andengineshutdownwilloccurat108°C
(227°F)iftheenginecoolanttemperatureshutdownoptionisenabled.