John Deere 644H User Manual

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64411

En~ine 64411

Type JohnDeerePOWERTECHTM6081H;meetsEPATierIInon-roademissionsregulations
Cylinders 6
Displacement 496cu.in.(8.1L)
Ratedpower 180SAEnethp(134kW)@2,200rpm
Peakpower 221SAEnethp(165kW)@1,600rpm
Netpeaktorque 755lb.-ft.(1020Nm)@1,300rpm
Nettorquerise 75%
Netpowerbulge 23%
Fuelsystem high-pressurecommonrail
Fuelconsumption,typical 4.3to7.5gal./hr.(16.3to28.4Uh)
Fueltankcapacity 100gal.(379L)
Lubesystem full-flowspin-onfilterandintegralcooler
Aspiration turbocharged,chargeaircooled

Aircleaner dualelementdrytype;restrictionindicatorforservice
Fandrive hydraulicallydriven,fanaftofcoolers

Airflow rearward

Electricalsystem 24voltwith55-ampalternator
Batteries(two12volt) 950CCA;reservecapacity:200min.- standard/ 1,400CCA;reservecapacity:200min.- optional

Transmission

Type countershaft-typepowershift

Converter single-stage,single-phasetorqueconverter
Shiftcontrol electronicallymodulated,adaptive,loadandspeeddependent
Operatorinterface steeringcolumn-mountedtwist-gripshiftlever,quick-shiftbuttononhydrauliclever

Shiftmodes auto/manual,autoto1stor2nd,kickdownorkickup/down,threeclutchcutoffsettings
Travelspeeds* Forward Reverse

Gear1 4.6mph(7.4km/h) 4.9mph(7.9km/h)
Gear2 7.6mph(12.2km/h) 8.0mph(12.8km/h)
Gear3 14.7mph(23.6km/h) 15.5mph(24.9km/h)
Gear4 22.0mph(35.4km/h)

*Equippedwith23.5R25radialtires.

Axles/Brakes

Finaldrives heavy-dutyinboardplanetary
Differentials conventionalfrontandrear- standard;hydrauliclockingfront,conventionalrear- optional;duallockingfrontandrear-

optional;limitedslipfrontandrear- optional
Rearaxleoscillation,stoptostop 26degrees
Brakes(conformtoSAEJ1473,IS03450)

Servicebrakes hydraulicallyactuated,inboard,carriermounted,pressureoilcooled,selfadjusting,multidisc

Parkingbrake automaticallyspringapplied,hydraulicallyreleased,oilcooled,multidisc

lIydraulic System/Steerin~

Pump(loaderandsteering) variable-displacement,axialpistonpump;closed-center,pressure-compensatingsystem

Maximumflow 68gpm(257Urn)@1,000psi(6895kPa)and2,200rpm
Pressure Ioaderandsteeringrelief3,600psi(24850kPa)

Loadercontrols two-functionvalve;single-anddual-levercontrols;controlleverlockoutfeature;optionalthird-andfourth-functionvalvewith

auxiliarylever

Hydrauliccycletimes

Raise 6.2sec.
Dump 1.4sec.

Lower 3.0sec.(floatdown)/ 3.5sec.(powerdown)
Total 10.6sec.

Maximumliftcapacity with4.25-cu.yd.(3.3nr)stockpilingandgeneral-purposebucketwithbolt-oncuttingedge

Liftatgroundlevel 34,166lb.(15495kg)
Liftatmaximumheight 20,226lb.(9173kg)