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9PRODUCTNEWSConExpo2014SHOWCASESMAJORKOMATSUTIER4BUILDOUTCConExpo2014wasasignificanteventforKomatsuwhichunveiledTier4versionsofninepiecesofequipment.IneverycasetheTier4machinesprovidebetterperformanceandproductivitywhileusinglessfuelthanpreviousmodels.ColumbusConnectionwillprovideanoverviewofeachofthesenewmachinesovertheupcomingissues.PC228USLC-10HydraulicExcavatorThenewDash-10versionofthetight-tailswingPC228excavatorisspecificallydesignedtoworkinconfinedareassuchasroadbridgeandurbanapplications.Theroundedcabdesignedallowsthecabtorotatewithinthesameswingradiusasthecounterweightand2865poundsofadditionalcounterweightincreasesthemachinesliftcapacityoverthefrontandside.TheTier4Interimengineincreaseshorsepowerby6.7percentoverpreviousmodelswhileloweringfuelconsumptionbyabout4percent.Theengineprovides158nethpthankstoanadvancedelectroniccontrolsystemthatmanagesairflowratefuelinjectioncom-bustionparametersandaftertreatmentfunctions.Thehydraulicsystemhasalsobeenimprovedtoincreaseefficiencyanddecreasehydrauliclossincreasingcyclespeedandproductivityatthejobsite.Komatsudesignedtheexcavatorforeasyserviceandalongreliablelife.Groundlevelaccesstokeyservicepointsmakesroutinemaintenancequickandeasyandlongreplacementintervalsforoilsandfiltersreducetimeandcostspentonmaintenance.AdditionallyKomatsuusesDT-typeelectroniccon-nectorstosealagainstdirtandmoisture.HydrauliccylindersareprotectedbymetalguardringsandO-ringsealsratherthanconventionaltapersealshelppreventleaksonhydraulichoses.D155AX-8CrawlerDozerThe354-hpD155isequippedwithanautomaticgearshifttransmissionandlock-uptorqueconverterthatcutsfuelconsumptionwhileimprovingpow-ertrainefficiency.Thelock-uptorqueconverterauto-maticallytransfersenginepowerdirectlytothetrans-TheTier4Interimengineincreaseshorsepowerby6.7percentoverpreviousmodelswhileloweringfuelconsumption