CASE CONSTRUCTION 621G Stage IV User manual

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621G
721G
Wheel Loader
SERVICE MANUAL
621G
721G
Stage IV
Wheel Loader
Part number 51428211
English
November 2017
© 2017 CNH Industrial Italia S.p.A. All Rights Reserved.
Part number 51428211
SERVICE MANUAL

SERVICEMANUAL
621GWHEELLOADERXR-EH,NEWCABTIER4BMULTIP .,621GWHEEL
LOADERXR-EH,NEWCABTIER4B,621GWHEELLOADERXT-EH,NEWCAB
TIER4B,621GWHEELLOADERZBAR-EH,NEWCABTIER4BMULTIP .,621G
WHEELLOADERZBAR-EH,NEWCABTIER4B,721GWHEELLOADERXR
EH,NewCabTIER4B,721GWHEELLOADERXR-EH,NEWCABTIER4B
MULTIP .,721GWHEELLOADERXTEH,NewCabTIER4B,721GWHEEL
LOADERZBAREH,NewCabTIER4B,721GWHEELLOADERZBAR-EH,
NEWCABTIER4BMULTIP .
51428211_EN18/12/2017EN

LinkProduct/Engine
ProductMarketProductEngine
621GWHEELLOADERZBAR-EH,
NEWCABTIER4BEuropeF4HFE613W*B003
621GWHEELLOADERZBAR-EH,
NEWCABTIER4BMULTIP.EuropeF4HFE613W*B003
621GWHEELLOADERXT-EH,
NEWCABTIER4BEuropeF4HFE613W*B003
621GWHEELLOADERXR-EH,
NEWCABTIER4BEuropeF4HFE613W*B003
621GWHEELLOADERXR-EH,
NEWCABTIER4BMULTIP.EuropeF4HFE613W*B003
721GWHEELLOADERZBAREH,
NewCabTIER4BEuropeF4HFE613T*B002
721GWHEELLOADERZBAR-EH,
NEWCABTIER4BMULTIP.EuropeF4HFE613T*B002
721GWHEELLOADERXTEH,
NewCabTIER4BEuropeF4HFE613T*B002
721GWHEELLOADERXREH,
NewCabTIER4BEuropeF4HFE613T*B002
721GWHEELLOADERXR-EH,
NEWCABTIER4BMULTIP.EuropeF4HFE613T*B002
51428211_EN18/12/2017

Contents
INTRODUCTION
Engine.......................................................................................10
[10.001]Engineandcrankcase.............................................................10.1
[10.202]Aircleanersandlines..............................................................10.2
[10.500]SelectiveCatalyticReduction(SCR)exhausttreatment...........................10.3
[10.400]Enginecoolingsystem.............................................................10.4
[10.414]Fananddrive......................................................................10.5
[10.310]Aftercooler..........................................................................10.6
[10.304]Enginelubricationsystem..........................................................10.7
Transmission..............................................................................21
[21.113]Powershifttransmission............................................................21.1
[21.135]Powershifttransmissionexternalcontrols..........................................21.2
[21.105]Powershifttransmissionhydrauliccomponents....................................21.3
[21.155]Powershifttransmissioninternalcomponents......................................21.4
[21.109]Transmissioncoolerandlines......................................................21.5
[21.700]Torqueconverter...................................................................21.6
[21.182]Differential..........................................................................21.7
Four-WheelDrive(4WD)system..................................................23
[23.314]Driveshaft..........................................................................23.1
Frontaxlesystem.......................................................................25
[25.100]Poweredfrontaxle.................................................................25.1
[25.102]Frontbevelgearsetanddifferential...............................................25.2
[25.108]Finaldrivehub,steeringknuckles,andshafts.....................................25.3
Rearaxlesystem........................................................................27
[27.100]Poweredrearaxle..................................................................27.1
[27.106]Rearbevelgearsetanddifferential................................................27.2
51428211_EN18/12/2017

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[27.120]Planetaryandnaldrives..........................................................27.3
Brakesandcontrols....................................................................33
[33.202]Hydraulicservicebrakes...........................................................33.1
[33.110]Parkingbrakeorparkinglock......................................................33.2
Hydraulicsystems.......................................................................35
[35.000]Hydraulicsystems..................................................................35.1
[35.300]Reservoir,cooler,andlters........................................................35.2
[35.106]Variabledisplacementpump.......................................................35.3
[35.359]Maincontrolvalve..................................................................35.4
[35.357]Pilotsystem........................................................................35.5
[35.204]Remotecontrolvalves.............................................................35.6
[35.752]Hydraulicfandrivecoolingsystem.................................................35.7
[35.820]Hydraulicdrivencoolingfans......................................................35.8
[35.355]Hydraulichandcontrol.............................................................35.9
[35.701]Frontloaderarmhydraulicsystem...............................................35.10
[35.723]Frontloaderbuckethydraulicsystem............................................35.11
[35.734]Toolquickcouplerhydraulicsystem.............................................35.12
Framesandballasting.................................................................39
[39.100]Frame..............................................................................39.1
Steering.....................................................................................41
[41.101]Steeringcontrol....................................................................41.1
[41.200]Hydrauliccontrolcomponents......................................................41.2
[41.216]Cylinders...........................................................................41.3
[41.910]Auxiliarysteering...................................................................41.4
Wheels......................................................................................44
[44.511]Frontwheels........................................................................44.1
[44.520]Rearwheels........................................................................44.2
Cabclimatecontrol.....................................................................50
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[50.200]Airconditioning.....................................................................50.1
Electricalsystems.......................................................................55
[55.000]Electricalsystem...................................................................55.1
[55.100]Harnessesandconnectors.........................................................55.2
[55.015]Enginecontrolsystem..............................................................55.3
[55.201]Enginestartingsystem.............................................................55.4
[55.301]Alternator...........................................................................55.5
[55.302]Battery..............................................................................55.6
[55.988]SelectiveCatalyticReduction(SCR)electricalsystem............................55.7
[55.989]ExhaustGasRecirculation(EGR)electricalsystem...............................55.8
[55.640]Electronicmodules.................................................................55.9
[55.024]Transmissioncontrolsystem.....................................................55.10
[55.020]Transmissionspeedsensors.....................................................55.11
[55.022]Transmissiontemperaturesensors..............................................55.12
[55.028]Transmissionuidsensors.......................................................55.13
[55.512]Cabcontrols......................................................................55.14
[55.415]Loaderarmandbucketcontrolsystem..........................................55.15
[55.530]Camera...........................................................................55.16
[55.DTC]FAULTCODES..................................................................55.17
Frontloaderandbucket...............................................................82
[82.100]Arm.................................................................................82.1
[82.300]Bucket..............................................................................82.2
Platform,cab,bodywork,anddecals.............................................90
[90.150]Cab.................................................................................90.1
51428211_EN18/12/2017

51428211_EN18/12/2017

INTRODUCTION
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1

Contents
INTRODUCTION
Safetyrules.....................................................................................3
Personalsafety.................................................................................4
Basicinstructions-Importantnoticeregardingequipmentservicing.........................13
Basicinstructions-Howtousethemaintenancestandardandprecautions.................14
Basicinstructions-Precautionfordisassemblyandassembly...............................16
Basicinstructions-Electricalequipmentprecautions........................................18
Consumables.................................................................................19
Consumables-BiodieselFuel................................................................21
Hydrauliccontamination......................................................................22
Productidentication-Machineorientation..................................................23
Productidentication..........................................................................24
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