TCM 890-3 Wheel Loader Service Manual SEW-690BE - PDF DOWNLOAD

No．SEW・690BE

．＿

T⊂：M⑧

雷圧搾靴雷励姐蝿姐藍 VVHEEL LOADER Ⅰヨヨ【コ＿3

TOYIリー臥H■lC0．，LTD．

FOREWORD

TCMiso脆ringawidevarietyofwheelloaderswhichhavebeenenthusiastical1ywelcomedbyusersa OVertheworld．

Mode1890−3articulatedwheelloaderisthelatestproductdevelopedbyTCM experience．

syearsofresearch

Tbgetthebestperformancefromyournewloader，itisrequiredtobeco血efamiliarwithitsfeatu

COnStruCtion，OPeratlngandmaintenanCePrOCedures． ThisServiceManualexplainsthestructureofthe890−3forservicepersonnelandshopworkers． nedescriptionsandspeci玉cationsdescribedinthismanualaresu叫ecttochangewithoutnotice．

TABLEOFCONTENTS 1．SPEC］F］CAT10NS 1．10UTERVIEWS 1．2SPECIFICÅnONS

2．ENGINEANDALuEDCOMPONENTS 2．1ENGINE 2．2LUBRICATINGSYSTEM 2．3 COOLINOSYSTEM 2．4FUELSYSTEM 2．5INrrAKEANDEXHAUSTSYSTEM 2．6ELECrRICALSYSTEM 2．7ENGINECONTROLUNIT

3．POWERTRA］N 3．1TORQUECONVERTER 3．1．1TORQUECONVERTER…．．． 3．1．2CHARGINGPUMP

3．2TRANSMISS10N 3．2．1TRANSMISSION 3．2．2TRANSMISSIONⅥu〃E 3．2．3 TRANSFER 3．2，4TRANSMISS10NCONTROL

3．3TRANSMISSIONOILCIRCULAr10NROUTES 3．4PROPELLERSHAFr

3．5DRIVEAXLES（FRONTANDREAR） 3．5．1DRIVEAXLE 3．5．2DIFFERENTIAL 3．5．3FINALREDUCT10NGEARANDBRAKEUNIT 3．6W■HEELASSEMBLY 3．6．1TIRE 3．6．2W｝IEEL

4．BRAKESYSTEM 4．1SEⅣⅥCEBRAXE 4．1．1BRARELINE

4．1．2BRAXヱ1旗止〃E 4．1．3 SPLITCYLlNDER．．．．．．．．． 4．1．4SLACKADJUSTER………………‥．．．．．……．…．．．…．．．．．．．．．．……

4．1．5DISKBRAKE

4．2PARKINGBRAKE、ANDEMERGENCYBRAKE 4．2．1BRAXELINE 4．2．2SPRINGBRAKE 4．2．3nlRKINGBRAKE

5．STEEFl］NGSYSTEM 5．1GENERALDESCRIPT10N 5．20ILCIRCULArIONROUTES 5．3STEERINGWllEEL 5．4STEERINGVA⊥Vモ

5．5 CONTROLLINKAGE 5．6STEERINGPUMP 5．7STEERINGCYLINDER……………．

5．8EMERGENCYSTEERINGUNIT（OPT10N） 5．8．101LCIRCULAr10NROUTES 5．8．2EMERGENCYPUMP 5．8．3DIVERTERVALVE

6．FRAMEANDCOCKP］T 6．1FRAME 6．2 COCKPIT

………………………………．117 7．HYE）RAUL］CSYSTEM．．．．．．．．．．．．．．．

7．101LCIRCUI−ATIONROUTES

118

7．2PUMP

120

7．2．1MAINPUMP

121

7．2．2POC＆BRAKEPUMP…．…．…．．……．．……．．…．．

123

7．3Ⅵu．VE

124

7．3．1MAINVA⊥VE．…．…．…．．．………………．………．．．．……．．…………．

124

7．3．2Ⅰ〉ILOTVÅl〃E

127

7．4VAl〃ECONTROIノS

128

7．4．1SYSTEMOPERATION

128

7．4．2 STOPVALVE

…………………‥130

8．LOADHANDLING SYSTEM 8．1BOOMS，BELLCRANKANDBUCKET 8．1．1GENERALDESCRIPT70N 8．1．2BUCKET

8．1．3BUCKETLEVELER，BOOMKICK−OUTANDGSS 8．2CYLINDERS 8．2．1BOOMCYLINDER 8．2．2BUCKETCYLINDER

9．ELECTR］CSYSTEM 9．1LIGHTINGEQUIPMENT 9．2METERSANDMON7TORLAMPS 9．3ELECrRICCIRCUITDIAGRAM

1．SPECIF］CAT10NS 1．10UTERVIEWS Unit：mm

＼

＼

＼ ＼

＼ ＼

＼

＼

＼

＼

＼＼

＼

＼

＼ ＼ ＼

げ

ヽ

」。−i。。」 椚g．1．10uteTViews

一1−

1．2．SPEC］FICAT］ONS ・TCM890−3

MaebineModel：

e，front−end，articulatedloader Per伽mance： e4withs

Buckettype： Bucketcapacity

aceed 6．Om3 5．1m】

StruCk

Breakoutfbrce（SAE）

41，500k 34，350k 10，800k

ucketc 00m C

Operatingload（fu11tum）： Raisingtime（loaded）：

LDWerlngtime： Bucketdumptime： navelspeed：

；1st

6．5km／h

7．3km几

2nd ll．5kmn1

2nd 12．5km仙

3rd

20．Obn爪

3rd

21．Obn几

4th

30．Obn爪

4th

32．ObIl爪

35，750k

Maximumtractionforce：

Gradeability： Minimumtumingradius

；1st

300gradeataspeedof2．2kmAl（1st，fwdgear）

artofloader，Ste attheoutemost lat the outermost ar【ofbucket atthecenterofoutermostwheel

8，230mm

8，930mm 7650 mm

Dimensions： Overa山1ength

bucketon

Ound，tOOthend

underunloadedstateintravelin

OSture，tOOthend

Overauwidth （Chassis）： bucket

Overa山heigbt

ucketon

Ound，tO Ofcab）：

11，180mm 10，970mm 3，700mm 4，050mm 4，080mm

6，985mm

ucketraised

4，100mm 2，750mm 3，790mm 4，000mm 3，080mm 3，210mm 4，080mm

Wheelbase： 取ead（丘on析ear）：

OSture，tOOthend）： Frontoverhang（intravelin （bucketon Ound，tOOthend ReafOVe止ang： Hoodheight（topofhandrail）：

I．oaderbodyheight（topofcab）：

490 mm

GroundclearanCe（Centerhingepin）：

Buckethingepinheight：

5，030mm

Dumpheight（450tiltedforward，tOOthend）：

3，330mm 2，025mm

Reach（450tiltedforward，tOOthend）：

Bucketroll−backangle（underunloadedstateintravelingposture）： Bucketdumpangle（bucketraised）： 490 mm

Diggingdepth（100tiltedfbrward，tOOthend）：

1，390mm

Tbwingpinheight：

ー2−

Weight： 45，100k

Weightofmachine： Weightdistribution： runder unloaded state undero

丘ontaxle

rearade

24，600k 41，800k

20，500k 13，970k

RElOTAO4dieselen

clewatercooled，V−10，dire

eranda負ercooler

with山rbochar

12V200Ah，2

Battery： Radiator

Plate五n＆血be ue converter

rdraulic oil

Stacked貢n

Aircleaner：

ater丘1ter

Porousandse

Mu組er：

Powertrain Tbrqueconverter Model：

690−38

3−element，One−Stage，Single−phasetype

取pe：

TransmisslOn Model： ■吋pe：

m4450W Electroma

efulト

OWerShif［，

fullmodulation

Reductiongearanddifferential TCM690−35

Model：

Ring＆pinion，2−Stagereductiontype

r丹pe：

Finalreductiongear TCM690−30

Model：

Planetarygeartype

1サpe：

Axles and wheels Drivingmethod：

Frontandrearwheeldrive

Frame−f玩d餌unmthgtype mmion，血u幻視ting吋pe

Frontaxle： Rearaxle：

35／65−33−24PR，し4

Tires（frontandrear）：

28．00x33WTB−282−32FrL

Rim（frontandrear）：

Brakesystem Servicebrake： Model：

Frontandrearwheelindependentbraking，fu11y−hydraulicwetdiskbrakes 2 lines

Numberof凸uidlhes：

Parkingbrake： Model：

Fron（axleinputshこIftbrakinぎ、！担廻垣担

Usedcommonlywithparkingbrake

Emergencybrake： Steering system TYpe： SteerlngCylinder：

Framearticulatedtype 2double−aCtlngplStOnS

ー3−

badbandlingsystem unkage： Type4（rockbucketwithspaceedge）

Bucketedge：

Hydraulic system Pilotb ,eration

Tシpe：

Boomcylinder： Bucketcylinder： Main pump

1double−aCtingpiston KFP5180−80AYJSP

Model： ■吋pe：

Steering pump KfP5180−80AX

Model：

Gear type

勺 pe：

POC＆brakepump KFP2233−14ADCS

Model：

Gear type

取pe：

Main valve KVSL−500−2

2−SPOOIslidingtypewithpilotoperationcontrol Pilotvdve Model：

MPPC−MD

2．spooIslidingtype

一4一

2．ENGINEANDALuEDCOMPONENTS 2．1ENG州E l．GeneralDescription Theenginemountedonthisloaderisa4−CyCle，Water−COOled，V−10direct叫ectiontypedieselengine・ ThepoweroftheengineistranSmittedfromtheflywheelthroughthedriveringtothetorqueconverter・

Fig．2．1EngineandAl1iedComponents

−5−

Name：

RElOTAO4dieselengme

Type：

4−CyCle，Water−COOled，VlO，directiTdectiontypewith

turbochargerandaftercooler Numberofcylinders−borexstroke：

lO−135mmx132mm

Tbtaldisplacement：

18．894ゼ

Compressionratio：

16．0

Engine performance Ratedspeed：

2，000rpm

Ratedoutput：

420 PS

Maximumtorque：

Dryweight：

190kg−m（atapprox．1，550rpm） 165grPSh（atapprox．1，550rpm） 180gPSh（atapprox．2，000rpm） aboutl，710kg

Dimensions

（OVeralllengthxoverallwidthxoveral1height）：1，995

Full−loadmin．fuelconsumptionratio： （atratedoutput）：

mmⅩ1，100mmxl，560mm

Firingorder：

lR−1L−5R−5L−2R−2L−3R−3L−4R−4L

Rotationaldirection：

Clockwisewhenviewedfromcooling払n

Ribbontypewithairheater Keyswitchtype 2，400IpmOrbelow Unloadedmax・Speed（whenseparatelyeaSured）： Startingaid： StopplngSyStem：

800±10甲m Unloadedmin．speed（whenseparatelymeasured）： 300infourdirectionswhenviewedfrom凸ywheel Allowabletiltingangle： Maintenance data

V山veopenlngandclosingtlmlng

Open

Closed

Intakevalve 140beforeTDC 440a負erI∋DC Exhaustvalve 520beforeBDC 200af（erTDC ValveclearanCe：

Intakevdve（COld）：0．3−0・4mm Exhaustvalve（COld）：0．5−0・6mm

叫ectiontiming： 叫ectionstartpressure：

200beforeTDC 230k釘Cm2

Compressionpressure：

aboutうokg／m2（at200rpm）

−6−

2．OuterViewofEngine l．TURBOCHARGE

15．WÅTERDRAINCOCK

27．CARHEÅⅠ℃RAIRINLET

2．EXHAUSTMANIFOLD

28．0ILLEVELGAUGE

（FORWARNINGLAMⅣ

16．TACHOMETER CONNECTINGPORT CTACHOMETERDRIVE）

FORAlRCLEANER）

17．FI二YlⅣHEEL

31．CYLINDERHEADCOVER

3．DUSTINDICArOR

29．OJLFILLER 30．AIRHEÅrER

（ROCKERCOVER）

4．FUELFILTER 5．FUELSTRJuNER

18．ⅦRPUMP（FOR

ENGINEPROPER）

32．1NJECTIONNOZZLE

6．MUFFLER 7．ENGINESTOPMOTOR

19．ⅥばrERPUMP（FOR

33．THERMOSTATHOUSING

8．FSSMOTOR 9．FANBEIJADJUSTING

20．BREATHER 21．GENERATOR 22．FEEDPUMP 23．INJECTIONPUMP 24．AFTERCOOLER 25．THERMO SENDERUNIT （FORENGINEWER TEMPERATURE GAUGE） 26．GENERATOR ADJUSTING BOLT

皿RCOOLER）

BOIJ lO．R互NBEIJ

ll．COOLINGFAN 12．0ILflmRPIPING OPENING 13．OILIJEVELSWITCH （NOTUSED） 14．0ILR互N

1 2

3 4 5 6

34．ⅦRDRAINCOCK

35．BREATHERHOSE 36．0ILPRESSURESWITCH

（FORHOURMETER） 37．0ILPRESSURESWITCH

（FORWARNINGLAMヤfOR ENGINEOILPRESSURE） 38．PRESSURESENDER CONNECTING PORT 39．CARHEATERAIROUTLET 40．STARl℃RMOTOR 41．FLⅣHEELHOUSING

7 8 9 1011

12 13

14 15

Fig．2．2 0uterViewofEngine（1々）

ー7−

Note：Forthepartsnameinthispage，refbrtotheprecedingpage・

20 21

17

18

19

椚g・2・3 0uterViewofEngine（2々）

一8−

22

23

3．En由neMollnting

neengineismountedontherearframethroughbracketswithmountingrubbers．

Note：臣−ぢ＝：：：：：コ9．Okg−m

匿＞往＝コ13．Okg−m

駐＞ぢ＝：コ22．8kg−m 5．PLATE

1．ENGINE 2．MOUmNGBRACKET

3．MOUNTINGRUBBER 4．MOUNnNGRUBBER

9．MOUmNGBRACK王TP．EFr）

10．HOSE ll．OmFILTER

6．PLATE

7．LOCKPLATE 8．MOUmNGBRACKヱT鱒IGHT）

Fig．2．4 MountingofEngine

ー9−

2．2 LUBR］CAT】NG SYSTEM

Lnbrication：

Forced lubrication

hlbricatingoilpump：

Gearedpump，directlycoupledtogeartrain

Filtration：

Full一色owpape一別ter，dualtype

Cooling： Oilpressureregulation： Lubricatingoilcapacity：

Water−COOled且attubetype

Regulator valve H：45ゼ，L：38ゼ

neenglnePartSarelubricatedbyfbrcedcirculationmethodbytheoilpump・ Theengineoilispickedupbytheoilpumpfromtheoilpanandsentthroughtheoilcooler，theoilfilter，and themainoilgal1erytotheenglnePartS・ Theoil別terisattachedtotheloaderbodyside（SeeFig．2．4．）

lNJECT］ONPUMP

FAN PULLEY ROCKER

SHA打 l

CYuNDER HEAD

G∈NER八丁OR

DRlVE PISTON

I

CAMSHAFT

WERPUMP （FORAFTER C00しER）

WATER PUMP （FORENG削∈

PROPER） ●

Fig．2・5 EngineLubricatingSystem

一10−

2．3 COOuNGSYSTEM

Coo血g：

Forcedcirculationbywater

Cooling蝕l：

Plate，PuShertype，1，060mmdia．，6blades，belt−driven

Ⅵねterpump：

Centrifugaltype，directlycoupledtogeartrain

Ⅵねtertemperatureregulator：

Name，けpe：

Thermostat，4pcs．

Openingtemperature−fu11−OPeningtemperature：76．50c−900c（2pcs．），820c−950c（2pcs・） Radiators 由一englne：

fortorqueconverter： forhydraulicoil： myweight： Coolingwatercapacity：

Plate銭n＆山betypePF2−7

Multiplatetype，PTO−LS（incorporatedintolowertank） Stacked伽＆tubetype，SFl−2

518 kg

163R（452forengine，88Rforradiator，20Afor Subtank，10ゼ鮎rothers）

Fig．2．6 EngineCoolingSystem

−11−

Thecoolingsystemisdividedintothatfortheengmeproperandthatfbrtheaf（ercooler，bothbeingawater− COOledforcedcirculationtypebymeanSOfthewaterpump．Theradiatorhasatorqueconver【eroilcoolerand

hydraulicoilcoolerbuiltinorattached．

（1）CoolingsystemRlrengineproper ThecoolingwaterlSPickedupfromtheradiatorbythewaterpumpfortheenglneprOperandissentintothe oilcoolertocooltheoil．Thewaterleavlngtheoilcoolerissenttothecylinderblockwaterjackettocoolthe cylinders・A鮎rcoolingtheoutsideofeachcylinder，thecoolingwatermovesuptothecylinderheadtocool

thevalves，paSSlngthroughthethermostat，andflowsbackintotheradiator・Whenthecoolingwater

temperatureislowenoughtokeepthethermostatclosed，thecoolingwaterrecirculatesthroughthebypasspipe

directlyintothewaterpumpwithoutflowingintotheradiator． （2）Coolingsystemforaftercooler ThecoolingwaterpickedupfromtheradiatorbythewaterpサmPfortheaftercooler幻owsthroughtheaf（er coolertocooltheintakeairandretumsbackintotheradiator． Note：Forthedetai1softheaftercooler，See

2．51NTAKEANDEXHAUSTSYSTEM．

一12−

2．4 FUELSYSTEM

Irdectionpump：

BoschP呼匹

叫ectionnozde：

Enclosedporous，long−Stemtype

lrtiectiontimlngadjustor： Fuel鈷edpump：

Centrifugalautomatictimer Piston type

fuel丘1ter：

Pape一別terty匹Withove瓜owvalve

Govemor：

Centrifugal（mechanical），al1−SPeedcontrol（RSV−S）

Fueltankcapacity：

650ゼ

Thefeedpumpdrawsfuel丘omthefueltankthroughthefuelstrainerandsendsitthroughthefuelmte theiTdectionpump，ffomwhichthefuelisdistributedtothein5ectionnozzle，thusbeinginjectedintothe COmbustionchamber．

1．FUELFImR 2．FUELTANK 3．FUELSTRAlNER 4．INJECTIONNOZZLE 5．FEEDPUMP

← FEEDLINE

6．INJECTIONPUMP

◆一−−0VERfLOWLINE

Fig．2．7 EngineFuelSystemSchematicDiagram

一13−

2．51NTAKEAND EXHAUSTSYSTEM

Aircleaner：

Drypaperfiltertype鰐GB16）（commonlyusedforstrutPreCleaner）

Mu］氾er：

Porousandseparatorplate

Turbocharger Turbocharging： mivhg： hbrication：

Exhaust−gaSturbocharging Exhaust−gaSdriven ForcedcirculationbyenglneOil

1．GemeralDescription

Theintakesystemoftheenglneisdesignedsothattheopenairisdrawnthroughtheaircleanerand COmPreSSedbytheturbochargerbeforebeingsentintotheintakemanifo1d．Theexhaustsystemisdesignedso thattheexhaustgasfromtheexhaustmanifo1dissentintotheturbochargertodriveit，anddischargedthrough 也emu組erhto也eatmosphere．．

▲

BecarefulnottotouchthemufnerandexhallStmanihldsincetheyarehotwhetltheenglneis

running伽rawhileaf（eritisshutof畿Otherwiseyoumightburnyourhand．

2．nlrbocharger

ItispossibletoattainhighenglneOutPutbysendinghighlycompressedairintothecylindersontheintake

StrOketoincreaseairsupply，thusincreaslngthequantityoffueltobein3ected・Toachievethispurpose，t loaderisequlppedwithaneXhaust−gaS−driventurbocharger．Theturbocharger sexhaustgasinletisconnected totheexhaustmanifo1d．Theexhaustgasrotatestheturbinewheelatahighspeed，beforebeingroutedthrough theexhaustgasoutletintothemufner．Therefore，theimpeller，mOuntedontheoppositeendofthesameshaft

astheturbine，alsorotatesatahighspeedtocompresstheairdrawnthroughtheaircleanerandsendittothe intakemanifbld．

3．A允ereooler

netemperatureOftheaircompressedbytheturbochargerincreasesasitspressureincreases・Asth

temperatureincreases，theproportionofincreaseinairdensitydropstoreducetheefficiencyofthe turbochargerortocauseknockiqg．Tbpreventthis，theloaderisequlPPedwithanaf（ercoolerbetweenthe turbochargerandin1etmanifo1d，tOreducetheintakeairtemperature・

Theaf（ercoolerisawater−COOledtypewhichhasanexclusivecoolingcircuitindependentoftheengine COOlingwaterchcuit．

ー14−

4．AirCleaner

TheaircleanerisusedincombinationwiththestrutprecleanertOe伍cientlyremovedust，aSWell

Substantia11yprolongtheservicelifeoftheaircleaner・ThedustremovedbythestrutPreCleaneri automatical1ydischargedthroughthe可ectorbuutintheexhaustsystemafterthemufner・

1．BODY 2．ELEMENT 3．ELEMENT 4．NUT 5．NUT 6．COVER

Flg．2．8 AirCleaner

OperationofstrutpreCleaner

Theairwhichhasenteredthroughthescreenhoodissuckedintothestruttubewheredustisseparatedby

Centrifugalforce・Theairfree丘omdustisthensenttotheaircleaner・Thedustremovedbythestruttubeis

SentthroughthescavenglngplPeandhoseintotheejectorinthetailpipe，fromwhichitisautomatical1y dischargedalongwiththeengmeexhaust・

DUSTY AIR

CLEAN AIR FROM MUFFLER

Flg．2．9 0perationofStrutPrecleaner

ー15−

2．6 ELECTRICALSYSTEM

BatteTy Model：

SD−14006

Capacity，VOltage：

200Ah，12V

Quantity： WbightperpleCe：

2pcs・

58kg

Starter motor

Type：

Reduction，Wettype

Ⅵ）1tage，Output：

24V；6．OkW

Startingmethod：

Pinion shift type

Generator

lype： Ⅵ）1tage，Output：

mivingmethod： Automaticchargingregulator Type：

A．C．semiconductorrectification，OPentype 24V；70A

Beltdriving Semiconductorregulator（builtingenerator）

Note：Fortheelectriccircuitdiagramoftheenglne，refbrto

T9・4ELECTRICCIRCUITDIAGRAM

・

A BANDER！！Useduecautionwhenhandlingthebatterymit・ 1． Nonre．Nosparks．Neversmokeoruse茄reornaked鮎menearthebatteryut）itsince且ammable gasisalwaysreleasedfromthebattery．Thereisdangerofexplosion・

2． Thebatteryelectrolyteisdilutesulfuricacid．ItwiIIcausepainfu1andseriousburnSifitget theskin．1tcancauseblindnessifitgetsintoeyes．Ifelectrolytegetsintoyoueyes，nuShyoureyes

OutWithwaterandgettoadocton

−16−

2．7 ENG］NECONTROLUN）T l．AcceleratorPedal

TheenglneSPeediscontrolledbyoperatingtheacceleratorpedal．Whentheacceleratorpedalispressed， 叫ectionpumpcontrolleverisactuatedthroughtheacceleratorrodandbeucranksothatanenglneSPe

Suitedtotheworkingconditionisobtained． neacceleratorpedalisprovidedwithapotentiometerwhichdetectspedaldepressionangleandsendsitto

theÅrC（AutomaticTransmissionContro11er）．

0（GND）

Note：Potentiometerspecification： Tbtalresistance：5kE2

1bltage：5V Relationshipbetweenpedaloperatingangleandpotentiometeroutputvoltage： 00−0．70V；170−2．85V 1．PEDAL

6．RETURNSPRING

11．HANGERPL打Ⅰ

2．BOIJ（STOI，PER）

3．BEARINGPIN

7．BEARING 8．UBOIJ

12．BRACKET 13．SENSORBOX

4．PUSHROD 5．BELLOWS

9．ARM lO．LEVER

E

（POTENT10MErER）

Fig．2．10 AcceleratorPedal

ー17−

2．EngineStopMotor Theenglneisstoppedbyoperatingthestarterswitch・Bytumingthestarterswitchtothe一†STOP【position， the叫ectionpumpISOPeratedbytheenglneStOPmOtOr，thusbringingtheengmetoastop・

3．FSS（FuelS且VingSystem）SⅥritdl PlacingtheFSSswitchintheONpositionwilloperatethe叫ectionさumpthroughtheFSSmotortoredu theenglnetOrqueCharacteristicsorputtheloaderineconomyoperationmode・ 1meFSSswitchislocatedontheinstrumentpanelinfrontoftheoperator sseat・

10

1．ENGINESTOPMOTOR 2．TORQUECUTMOTOR （FSSMOTOR）

3．BRACKET

4．BRACKET

8．ROD

5．BRACKET

9．ROD

6．WIRESUPPORT

lO．INJECTIONPUMP

7．LEVERASSEMBI＿Y

Flg．2．11EngineStopMotorandFSSMotor

一18−

3．POWERTRAIN

Thepowertrainconsistsofthetorqueconverter，tranSmission，丘ontandrearaxles，tires，andpropellershaf whichlinkthem． Thepowerfromtheenglneistransmittedfromthetorqueconverterthroughapropellershafttothe

transmission，fromwhichitisthendistributedthroughpropellershaf【stothefrontandrearaxles．Thep transmittedtoeachaxleisfurthersentthroughthewheeltothetiresothattheloaderrunS・

Theschematicdiagramofthepowertrainoftheloaderisshownbelow．

（巨＝⇒）

：PROPELLERSHAFT

Fig．3．1SchematicDiagramofPowerTrain ー19一

3．1TORQUECONVERTER

Tbrqueconveder Model：

690−38（8FN−1750−3）

坤pe＝

3−element，Single−Stage，Single−Phasetype

Pressuresetting： Charging pump

4・0−5・6k釘Cm2

Model：

TP20350−300A

Type：

Geartype，dual 239■ゼ血in（at2，000rpm，3k釘mり

Discharge（丘ont）：

207A／min（at2，000rpm，30kgkm2）

（rear）：

3．1．1TORQUECONVERTER

netorqueconver（erconsistsprlmarilyoftheconverterwheelassembly，pumpdrive，Chargingpumpand

housing． Theconverterwheelassemblyiscomposedofanimpe11erandaturbinewhichareopposedtoeachother，a

StatOrbetweenthem，andaconverterhousingfu11yfi11edwithoil．Thepumpdrivedrivesthepumpsby

Ofthepumpdrivegearfittedtotheimpeuerhub・

Thetorqueconverterisinstal1edontheengineflywheelhouslng，withthetorqueconverterdriverlng （COuPlinggear）boltedtotheengineflywheel，thusallowingthetranSmissionofthepowerfromtheengineto thetorqueconverter．

（ENGtNE）

Note：旺＞ぢ＝コ5．1kg−m 匡＞ぢ＝コ8．2kg−m

紹＝ゝTkeadedarea：LOCTITE262

Flg．3．2 ConnectionofEnginetoTorqueConverter

−20一

‑3

11 12 4

（Pipingport）

1．toTRANSMISSION（DRAIN） 2．toTRANSMISSION（BREATHERPIPE） 3．CONVEmROILINLET（fromTTiANSMISSION） 4．CONVEmROILOUTLET（toOILCOOLER）

灘

（Checkport）

11．CONVERTEROUTPRESSURECHECKPORT；PTl／8（PLUG） ∨始W100kingfromA

12．CONVEmROUTTEMPERATURECHECKPO町PTl／4 （PLUG）

Dryweight：about208kg

13．CONVERTEROUTTEMPERATURECHECKPORT

（forCONVEmROILTEMPER〟rUREGAUGE） Fig．3．3 0utsideViewsofTbrqueConverter

PerearethepartnamesofthecrosssectionalviewsofthetorqueconvertergiveninFig・3・4） 1．COVERWllEEL 2．TURBINEWHEEL

10．ORIFICE（1．0Ⅱlmdia．） 18．PUMPDRIVEGEAR ll．ORIFICE（1．Ommdia・） 19・SPRING

3．DRIVERING

6．STATORHUB

12．DRIVENGEAR （FORMAINAND STEERINGPUMPS） 13．DRIVESHAFr 14．SEALCARRIER

7．SmrOR

15．］NPUTFLANGE

8．IMI〉ELLER

16．TURBINESHAFr

9．CONVEmRHOUSING

17．ST二ATORCARRIER

（COUPLINGGEAR） 4．IMPELLERHUB 5．INPUTGUIDE

−21−

20．PISTON（OUTLETVA⊥VE） 21．DRIVENGEAR（FORPOC＆

BRAKEPUMP） 22．SPLINEDHUB 23．DRIVENGEAR

（FORCHARGINGPUMP） 24．SPLINEDHUB

conveneroi10Uttet

POC＆brakepumpsido

CharglngPumPSide

Note：駐＞ぢ＝＝才4■3kg−m

匿＞ぢ＝コ5・6kg−m

匡＞ぢ＝コ7・7kg−m

匿＝−ぢ＝コ9・7kg−m

匠＞ぢ：：：：コ18．5kg−m Note：Forthepartnamesinthesesketches，re飴rtotheprecedingpage．

Flg．3．4 CrossSectionalViewsofTbrqueConverter

ー22一

Powertransmission

nepowerfromtheenglneistransmittedfromtheflywheelthroughthedrivenngto：thetorqueconverter COVerWheel→impeller→turbine→turbineshaft→tranSmission・

Oil flow

Thetorqueconverteroperatingoil，SentfromthetransmissioncontroIvalve，flowsthroughtheoilpas

thestatorcarrierintotheconverterwheelassembly．

AstheenglnerunS，theimpellerrotates・Theoi川owsalongthebladesoftheimpellertowardtheperiphe ofthelmpellerandgetsintotheturbine・Thisoilflowhitstheturbinebladestotumtheturbine，thusrotat

theturbineshaft．Thereactionforceobtainedbytheoilflow，Whose幻owdirectionhasbeenforcedtochang

byhittingtheturbineblades，becomestheoutputtorqueoftheturbineshaft・Thestatorrectifiestheoilc

fromtheturbineinacertaindirectionandletsitflowintothelmpellertoincreasethetorque．

Partoftheoilintheconverterwheelassemblyflowsthroughtheoilpassageinthestatorcarrierintotheo COOler．Anoutletvalveisinstalledatthetorqueconverteroiloutlettoregulatetheoilpressureinsidethe COnVerteThoushg．

Fig．3．5 0ilFlowinTorqueConverter

−23−

3．1．2 CHARGJNG PUMP

nechargingpumpisiittedattherearsideoftheconverterhouslng，anddrivenbythepumpdriveofthe

torqueconverter．Therefbre，aStheenglnerunS，thechargingpumprotatestodrawthehydraulicoilfromthe

transmissionsumptankthroughthestrainer． Thechargingpumpisadoublepumptype，Withthefrontpumpservingasthelubricatingoilpumptofted

Oiltothetransmission，andtherearpumpworkingasthechargingpumptosendoil，PaSSingthroughth filter，lntOthetranSmissionvalve．

9 8 7 6 5 4 3 2 1

Weight：about23・2kg

19 Section CC

替 Section BB

Section AA

1．COVER

8．DRIVENGEAR

15．ISOLATIONPLATE

2．−▼0−▼−RING

9．REARBODY

16．BACK−UPRING

3．DRIVENGEAR

lO．0ILSEAL

17．．−▼0，▼−RING

4．FRONTBODY

ll．STEELRING

18．RINGREmNER

5．PRESSUREPLATE

12．FRONTDRIVEGEAR

19．PLUG

6．DOWELPIN

13．SPLINECOUPL】NG

7．BEARINGPI。ÅIIE

14．REARDRIVEGEAR

Fig．3．

CbargingPump

一24−

3．2TRANSMISS］ON

Model：

KTM4450W

Type： Redudiongear： Speeds：

Electromagneticfu11power−Shif（，Planetarygeartype（fu11modulation）

Combinationofspurandhelicalgears 4知d／rev

Clutch

Type： Operation： Pressuresetting：

Wetmultipleplatetype Hydraulic 20kがm2

3．2．1TRANSMISSJON

¶letranSmissionchangesthespeedanddirectionofthepowersentfromthetorqueconverter・ Thetransmissionofthisloaderisanelectromagneticfu11power−ShiftplanetarygeartypeWhichhasfour SPeedsbothinforwardandreverse．Itisamicroprocessor−COntrOlledfu11yautomatictype（fu11modulation）・

す司

匠＝−ぢ＝＝コ14．4kg−m

Note：

匿＞ E＝コ22．8kg−m

（REARFRAME）

1．TRANSMISSION 2．TRUNNION 3．CUSHION 4．SHIM，t＝0．5mm

5．DOWELPIN 6．PIN 7．CUSHION 8．BRACKET 9．WASHER

Flg．3．7 SchematicI．ayoutofTransmission

ー25一

W軸ht：1，400kg

Pl Modulationprcssurc

．．．・・′−．一

OilpressuremcasurlngPOints：

P3 Prcssurc rcducing valvc pressurc P5 Pilotprcssurcrcducingvalvcprcssurc Section CC

P6 Mainreliefpressure P8 Torque converter relief prcssurc P9 Lubricating oil valve pressure PlO Accumulatorpressurc Pll PriorltypreSSure

View100kin9fromZ

匝 Viewlooking†romY

9．SPEEDSENSORPORT

21．fromCHARGINGPUMP

lO．0ILFILLERPORT

22．丘omFI皿R

3．TRANSMISSIONVALVE

5．COUPLING 6．COUPLING 7．PILOTOILFILTER

ll．OILDRAINPORT

23・fromTORQUECONVERTER（BREATHERPIPING）

4．LUBRICArINGOILBYPASSVALVE

8・（EMERGENCYPUMP）

12．SUCTIONPORT

24．toTORQUECONVERTER

1．TRANSMISSION 2．TRANSFER

25・tOTORQUECONVERTER（DRAINPIPING）

Fig．3．8 0uterViewsofTlansmission −26−

10．INPUTSHAFr

ll・SUNGEAR（32T） 12．PLANETARYGEAR （29T）

13．REVERSECLUTCH

14・RINGGEAR（112T） 15・RINGGEAR（90T） 16・SUNGEAR（45T） 17．FORWARDCLUTCH

18・RINGGEAR（95T） 19．PLANETARYGEAR （ニ5■り

20．PLANETARYGEAR （25T）

21．4THCLUTCH

22・SUNGEAR（45T） 23・RINGGEAR（117T） 24．2NDCLUTCH

ぴ・HUB（90T） 26．3RDCLUTCH

27・RINGGEAR（95T） 28．PLANETARYGEAR （21T）

29・SUNGEAR（53T） 30．1STCLUTCH

31・RINGGEAR（95T）

32．PLANETARYGEAR （21T）

33・SUNGEAR（53T） 34．OUTPUTSHAFr 35，CARRIER 36．CARRIER 37．CARRIER 38．CARRIER

Flg．3．9 SectionalViewofTransmission

ー27−

1．GeneralDeseription

Thetransmissionassemblyconsistsoftheplanetarygear typetranSmission（4speedsfwd／rev），tranSferandtransmission

Speed Clutch Speed Clutch range engaged range engaged

Valve．

Thetransmissionchangesthepowerfromtheinputshaftby

fl

COmbiningtheforward，reVerSe，1st，2nd，3rdand4thclutches F2

properly，tOSendittotheoutputshaftinvariousspeedranges （1stto4thinforwardandreverse）・

Fwd，1st Rl

Fwd，2nd

Rev，1st

R2

Rev，2nd

F3

Fwd，3rd R3

Rev，3rd

F4

fwd，4th R4

Rev，4th

2．OperationofClutch （1）WhenclⅦtChisengaged ① whentheclutchisengaged，theoilsentfromthe

transmissionvalveflowsthroughtheoilpassageinthe transmissiontoreachthebackofthepiston（2），thus movlngthepistonintothedirectionindicatedbythe alTOW．

② Themovementofthepistonaggregatesthedisks（4）and plates（5）intoonepiecesothattheringgear（6），engaged Withthedisks（4），WOn trotate・

Flg．3．10 ClutchEngaged

（2）Whenclutchisdisengaged

① whentheclutchisdisengaged，theoilsentfromthe 8

5

4 3

transmissionvalveiscutoffandthepressureoftheoil actingonthebackofthepiston（2）drops・ ② Thepistonisretur71edbythereturnSPring（3）intothe directionindicatedbythearrow，tOunlockthedisks（4） andplates（5），thuslettingtheringgear（6）toidlesothat thepowerfromtheenglneisinterrupted・

Fig．3．11ClutchDisengaged

−28−

3．PowerFlow （1）Power伽win伽rward瓜田トSpeedgear

罰g．3．12 PowerFlowinForwardFirst−SPeed

Whenthetransmissioncontrolisplacedintheforwardfirst−SPeedposition，theforwardclutch（17）an firstclutch（30）areconnected．Thepowerfromthetorqueconvertertotheinputshaf（（10）isthustransmitted totheoutputshaft（34）．

neforwardclutch（17）isactuatedbyoilpressureappliedtoitsclutchpiston，tOlocktheringgear（18） TTLe貢TStClutch（30）isalsoactuatedbyoilpressureappliedonitsclutchpistontolocktheringgear（31）・ ① Thepower丘omthetorquecopverteristransmittedtotheinputshaft（10），fromwhichthepoweristhen deliveredthroughthesungear（16）tothe／planetarygear（19）・

② withtheringgear（18）lockedbytheforwardclutch，therotationoftheplanetarygear（19）turnsthe Carrier（36）insidetheringgear（18）． ③ Therotationofthecarrier（36）issentthroughtheringgear（23）tothe飴汀ier（37），fromwhichitisfurther distributedthroughtheringgear（27）tothesungear（33）・ ④ sincetheringgear（31）islockedbythefirstclutch（30），therotationofthesungear（33）istranSmitted throughtheplanetarygear（32）andcarrier（38）totheoutputshaf【（34）・

−29−

（2）Powernowin駄IrWardse印nd−Speedgear

Flg．3．13 PowerFlowinForwardSecohd−Speed

Whenthetransmissioncontrolisplacedintheforwardsecond−SPeedposition，theforwardclutch（17） thesecondclutch（24）areconnected．Thepowerfromthetorqueconvertertotheinputshaft（10）istranS totheoutputsba魚（34）．

Theforwardclutch（17）isactuatedbyoilpressureappliedtoitsclutchpiston，tOlocktheringgear（18）・ Thesecondclutch（24）isalsoactuatedbyoilpressureappliedonitsclutchpistontoaggregatetheringgea （23）andthehub（25）・

① nepowerfromthetorqueconverteristranSmittedtotheinputshaft（10），fromwhichthepoweristhen qeliveredthroughthesungear（16）totheplanetirygear（19）・

② ☆iththeringgear（18）lockedbytheforwardclutch，therotationoftheplanetarygear（19）ttlmSth Carrier（36）insidetheringgear（18）・

③ Therotationofthecarrier（36）issenttotheringgear（23）・Sincetheringgear（23）andthehub（25）are lockedtlPbytheclutch（24），therotationofthehub（25）issenttotheoutputshaf（（34）・

−30−

（3）Powerflowinbrwardthird−SPeedgear

［

［

「

「r

［

Flg・3・14 PowerFlowinForwardThird−SpeedGear

Whenthetransmissioncontrolisplacedintheforwardthird−SPeedposition，theforwardclutch（17）and thirdclutch（26）areconnected・Thepowerfromthetorqueconvertertotheinputshaft（10）istransmittedtothe OutputShaf（（34）．

nefbrwardclutchandthethirdclutchareactuatedbyoilpressureappliedtotheirclutchpistons，tOlock therhggears（18，27）．

① ThepowerfromthetorqueconverteristranSmittedtotheinputshaft（10），fromwhichthepoweris deliveredthroughthesungear（16）totheplanetarygear（19）．

② withtheringgear（27）lockedbytheforwardclutch（26），therotationoftheplanetarygear（19）tumsthe Carrier（36）insidetheringgear（18）．

③ Therotationofthecarrier（36）issentthmghtheplanetarygear（20）totheringgear（23）・Sincethering gear（23）issplinedtothecarrier（37），therotationofthering（23）issentthroughtheplanetarygear（28） †0血esungear（29）弧dtbeoutputsh通（34）．

−31−

（4）Powerflowin伽rwardburth−Speedgear

Fig．3．15 PowerFlowinForwardFourth−SPeedGear

Whenthetransmissioncontrolisplacedintheforwardfburth−Speedposition，thefbrwardclutch（17）andthe fburthclutch（21）areconnected・Thepower丘omthetorqueconvertertotheinputshaf（（10）istransmittedto theoutputshaft（34）・

Theforwardclutchandthefourthclutchareactuatedbyoilpressureappliedtotheirclutchpistons，tOlock therhggears（18，23）・

① Thepowerfromthetorqueconverteristransmittedtotheinputshaft（10），fromwhichitisdeli throughthesungear（16）totheplanetarygear（19）・ ② withtheringgear（18）lockedbytheforwardclutch（17），therotationoftheplanetarygear（19）tumsthe Carrier（36）insidetheringgear（18）・

③ sincetheringgear（23）islockedbytheclutch（21），therotationofthecarrier（36）issentthroug planetarygear（20）tothesungear（22）whichintumrotatestheoutputshaft（34）・

ー32−

（句 Power伽winn已YerSe瓜柑t−Speedgear

川 11 12 13

14 15

38 31

32 33 34

Fig．3．16PowerFlowinReversdFirst−SPeedGear

WhenthetranSm章SSioncontrolisplacedinthereverse点rst−SPeedposition，thereverseclutch（13）andthe 蝕stclutch（30）areconnected．Thepower駐omthetorquecoTIVertertOtheinputshaf（（10）istransmittedtothe OutputShaf【（34）．

Thereverseclutch（13）isactuatedbyoilpressureappliedtoitsclutchpistons，tOlockthecarrier（35）．The 蝕stelutch（30）isactuatedbyoilpressureappliedonitsclutchpistontolocktheringgear（31）・ ① Thepower丘omthetorqueconverteristranSmittedtotheinputshaf（（10），ffomwhichitisdelivered throughthesungear（11）totheplanetarygear（12）． ② sincethecarrier（35）islockedbythereverseclutch（13），therotationoftheplanetarygear（12）tumsthe ringgear（15）．Theringgearrotatesinthedirectionoppositetothatoftheinputshaf（・ ③ Therotationoftheringgear（15）istranSmittedtothecarrier（36）．Sincetheringgear（31）islockedby the点rstclutch（30），therotationofthesungear（33）issentthroughtheplanetarygear（32）andthecarrier （35）totheoutputshafl（34）．

−33−

3．2．2TRANSMISS10NVAU／E

1 2

3

6

4

丁 8 9 川 1112 13 日

1．PILOTPRESSUREREDUCING

VALVEPRESSURECH王CKPORT

2．LOWERVALVE 3．UPPERVALVE 4．MA【NRELIEFVALVE 5．PILOTOmFILTER 6．CONVERTERRELIEF PRESSURECHECKPORT 7．TRANSMISSIONLUBRICATION OtLPRESSURECIiECKPORT 8．MAINRELIEFPRESSURE

CH王CKPORT 9．PRIORITYPRESSURECH王CK PORT lO．PRESSUREREDUCINGVALVE PRESSURECHECKPORT ll．MODULATIONPRESSURE CHECK PORT 12．ACCUMULATORPRESSURE CHECK PORT

13．TTLAJISMISSIONSOLENOID VALVE（Fig．3・ZO）

14．EMERGENCYMANUAL SPOOL 15．CONNECTOR

Flg．3．17 0uterViewsofTtanSmissionV山ve

−34一

1．PISTON 2．TORQUECONVERTER RELIEF VALVE

Sectional扇ewAA（Upperva相可

3．MAINRELIEf■VALVE

4．PILOTPRESSURE

REDUCINGVA⊥VE

5．QUICKRETURNVALVE 6．MODULÅrINGVALVE 7．PRIORITYⅥ1m 8．ⅤÅLVEヨODY

9．1SrrLSPEEDSPOOL lO．2ND−SPEEDSPOOL ll．ACCUMULArOR（FOR

2NDSPEED） 12．PILOTFI皿R

13．FORWARDSPOOL 14．PILOTPRESSURE

REDUCINGVA⊥VE

15．LUBRICÅrIONOIL

M 16．REVERSESPOOL SectionalviewCC（MainreJjefvarve）

Fig．3．18 SectionalViewsofnansmissionⅥ止ve（1／2）

ー35−

17．4TH−SPEEDSPOOL 18．3RD−SPEEDSPOOL

10

9

11

Flg．3．19 SectionalViewofTransmissionValve（2n）

Theoildelivered丘・OmthetorqueconverterchargingpumpflowsthroughtheportAofthemainreliefvalv

intothepriorityvalve，Wheretheoilflowisdividedintothreesub−nOWS＝Onefortheclutchpistons，One pilotpressurereducingvalve，andoneforthemainreliefvalve・Thepilotpressurereducingvalvecircuit Pri0rityovertheothercircuits・

Theoilwhichhas幻owedintothepilotpressurereducingvalveworksasthepilotoilpressuretooperateth forwardandreverseandspeed−ChangespooIs，makingltSWaylntOeaChspoolthroughtheorificeto航11the SpOOl・

Anotheroi用owisdirectedtothemodulatingvalveandthequickretumvalve．Thesevalvesinteractswith

eachothertoactontheforward，reVerSe，1st，2nd，3rd，and4thspooIstohelpincreasetheclutchlock− PreSSureSmOOthly，thusal1eviatlngShockduringshifting・

Theaccumulatorvalveshortensthetime缶1tduringshiftingfrom2ndtoIst，bycontrollingtheclutchoi 凸owforsecondspeed．

ThelubricatmgoilvalvecontroIsthelubricatingoilpressureflowinsidethetransmission・

ー36一

ThetranSmissionsolenoidvalvesareinstal1edonthetransmissioncasealongwiththetransmissionvalve． Whentheshiftleverisoperated，therespectivesolenoidvalvesareactivatedtomovethespooIsinsidethe transmissionvalve． 15

SectionAA

Relationship between SOlenoidYal▼e5andcl11tCh F R Fl ○

2 3 4 ○

f2 ○

○

f3 ○ 16．FIRST−SPEEDSOLENOIDVALVE

f4 ○

17．SECOND−SPEEDSOLENOIDVA⊥VE

N

18．THIRD−SPEEDSOLENOIDVALVE

○ ○

Rl

○ ○

20．FORWARDSOLENOIDVÅLVE

R2

○

21．REVERSESOLENOIDVA⊥VE

R3

○

R4

○

19．FOUm−SPEEDSOLENOIDVALVE

22．VALVEヨODY

Flg．3．20 取anSmissionSolenoidV山ves

ー37−

○ ○ ○

1．MainRelierValve

C山tch

Themainreliefvalvesuppliesanecessary VOlumeofoiltotheclutchduringgearshifting， Whileroutingthe oildirectly to thetorque COnVerterOtherthanduringshif【ing．

Operation

① Theoilfromthepumpflowsthroughtheoil 餌terintotheportAofthemainreliefvalve （1）・

② Theoilcontinuestoflowintothepriority Valveuntilthespecifiedoilpressureis reached．

Fig．3．22 MainReliefl血1venotinOperation ③ whenthespecifiedoilpressureisreached，

theoilwhichhaspassedthroughtheorifice Ofthereliefvalve（1）pushesthepoppet（2）， thusmovingthereliefvalve（1）tothe directionindicatedbythearrowtorelieve excessoiltothetorqueconvertersothatthe Oilpressureiskeptatthespecifiedvalue・

Note：Specifiedpressure：30kgkm2

Fig．3．23 MainReliefl血1veinOperation 一38−

2．PilotPres5ureRedueimgVilYe ThepilotpressurereducingvalvecontroIsthepressureofoilforoperatingspeed−ChangespooIs・

Operation

① neoilfromthechargingpumpflows，PaSttheoil別ter，intotheportAofthepilotpressurereducin Valve（1）． ② neoi柑owsthroughportAandportB，PaSttheor漬ceofthespeed−Changespool（2），intoportC・

Fig．3．24 PilotPressureReducingV山veNotOperating

③ AsthepressureoftheoilintheportCincreases，thepressureoftheoilwhichflowedfromtheori茄ce．Ta▼

Ofthepilotpressurereducingvalve（1）toportDalsoincreases．Thepilotpressurereducingvalve（1）

movesintothedirectionindicatedbythearrow，tOblockupportsAandB，thuskeeplngthepressur

theoilatportC．

椚g．3．25 PilotPressureReducingV山veinOperation

ー39−

3．TransmissionSolenoidValves

TransmissionsolenoidvalvesareinstauedonthetranSmissionvalve，Oneforeachspeed−Changespool・

Whentheshiftleverisoperatedattheoperator，scompartment，thesolenoidvalvesareactuatedtooperate forwardorreversespoolandthecoITeSPOndingspeed−Changespool・

Operation （1）Solenoid▼alYe

OFF−

neoil丘omaspeed−Changespool（2）flowsintoportAbuttheportAisblockedupbythesolenoidv （1）sothatneithertheforwardorreversespooloranyspeed−ChangeSpOOl（2）isnotoperated・

椚g．3．2 （2）SolenoidYalve

ON

① whentheshiftleverisoperated，aSOlenoidvalve（1）israised・

② Theoilfromthefbrwardorreversespooloraspeed−Changespool（2）entersportAandflowsthroughthe solenoidvalve，paStPOrtB，tOthedraincircuit・Therefore，theoilpressureatportAdropstoactua

forwardorreversespoolorthespeed−Changespool（2）・

2

1

椚g．3．27

一40−

4．PdorityValve

nepri0rityvalvecontroIstheminimumpressureofoilforthepilotpressurereducingvalve．Italsodirects Oilprefbrentiallytothepilotpressurereducingvalve． Operation

① neoilfromthechargingpumpflowsintotheportAofthepri0rityvalve（1）andtheportBofthepilot pressurereducingvalve（2）．

Flg・3・28 Pri0rityV山veNotOperating

② TheoilwhichhasenteredportAflowsthroughtheorificeI7a−TofthepriorityvalvetoportD，mOVingthe priorityvalve（1）intothedirectionindicatedbytheaITOW，withtheforceofthespring（3）andtheoi pressureovercomingtheforceofthespring（4）． Forthisreason，pOrtAisconnectedtoportCtoallowoiltoflowtothemodulatingvalve．

Fig．3．29 Pri0rityV山veinOperation

ー41−

5．ModulatingValYeandQuickRe血mValYe 亜

PreVenttheoccurrenceofpeaktorqueinthepower line．Thisreducesoperatorfhtigueduringoperation， durabilityofthepowerlimeaswell・

20

providesbetterdrivingcomfbrt，andincreasethe

C

30

transmissiontoal1eviateshockduringshiftingandto

富里署2コ拐 ￠ L d 一 6

nemodulatingvalveandquickreturnValvecombine toincreasetheclutchlock−uPpreSSureOfthe

10

0．5

Hour

椚g．3．30

Operation （1）Immediatelyaftershifting（Fig．330，pOintA）

① Theoilfromthechargingpump幻owsthroughthepri0rityvalve（1），paStPOrtAandthemodulatingvalve （2），intotheportBofthequickreturnvalve（3）・

② Theoil，then，PaSSeSthroughtheorince一一a一一ofthequickretumvalve（3）toaclutchpiston・Astheoil passestheori鮎e一▼a一一，thereoccursapressuredifferentialacrossportBandportC，SOthatthequickret

Valveisshif（edtotherighttoletoiltoflowtotheclutch（5）・ ③ nemovementofthequickreturnvalve

（3）totherightopensthedrainportDtoletpressurizedoilatthe

backofthepiston（4）to80WtOthedraincircuit・

Flg．3．31ImmediatelyAf（erShifting

ー42−

（2）Clutchoilpressureincreasing（Fig・3・30，POintB） ① Astheclutchpistonpressureincreases，theoilpressureatportCalsoincreasestoretumthequickretum Valve（3）totheleft，thusclosingthedrainportD．

② Theoil丘omthechargingpumpflowsthroughportCtotheclutchpiston，Whileflowingthroughor漬c TTbTT，PaStthequickreturnValve（3），intoportE・

③ TheoilatportEactsonthemodulatingvalvepistontomovethepiston（4）totherightagainsttheforceof 也espring（6）． ④ Atthesametime，preSSurizedoilflowsthroughtheorificeintothepoppet（7）ofthemodulatingvalve（2），

tomovethemodulatingvalve（2）intothedirectionindicatedbythearrow，thusallowingoiltoflowfrom POrtAtoportG・

Fig．3．32 ClutchOilPressureIncreaslng

ー43−

（3）Clutchoilpressureincreased（Fig．3．30，POintC）

neoilwhichhaseTlteredportEcontinuestopressthepiston（4）uptoitsstrokeendsothattheincreasein Clutchoilpressurestops・Thepressureatthistimemeansthepressuresettingofthemodulatingvalvq・ PortsFandGareblockedupbythepiston（4）・

Fig．3．33 ClutchOilPressureIncreased

ー44−

．PreぉⅦreReducingValve nepressurereducingvalveislocatedinthecircuitofthequickreturnvalveandthesecond−SPeedspool，t

reducetheoilpressureappliedtothesecond−Speedclutch，thusprovidingprotectionforthesecpnd−SPeed Clutcb． nemaximumoilpressurefortheentirecircuitiscontTO11edbythemainreliefpressure・

Operation

① neoilfromthequickretumvalve enterportA，PaStPOrtB，tOthe SeCOnd−Speedspool（2）・

Fig．3．34 PressureReducingV山veNotOperating

② whenthesecond−SPeedclutchcircuitis丘11edwithoilenoughfbrtheoilpressuretheretoincrease，theo flowsthroughportB，PaStOri且ce． a

，intoportC，tOpuShthepoppet（3）・

③ Thepressurereducingspool（1）ismovedbythepoppet（3）intothedirectionindicatedbythearrow againstthespring（4）．ThisblockupportsAandBtocutofftheoilflow・Atthistime，theoilpressurei 17k釘Cm2． B

−45−

7．AecumulatorVal▼e

neaccumulatorvalveal1eviatesthedropinthesecond−Speedclutchoilpressureduringshiftingfrom2ndto

Ist，byslowlyremovingtheoilfromthesecond−SPeedclutchpistontoprovidesmoothgearshifting鱒Om2n Istspeed・

Operation （1）Whengearsaresbi鮎dintosecomdspeed ① whengearsareshiftedintosecondspeed，theoilfromthepumpflowsthroughthepressurereducingvalve intotheportAofthesecond−Speedspool（5）・

② nemovementofthesecond−SPeedspooIconnectsthecircuit丘omportAtoportBtoletoiltoflowt portC． ③ TheoilatportCflows，PaSSingthroughthecheckvalve（2）andorifice

a

，tOPOrtD・

fromPRESSUREREDUCINGVALVE

F王g．3．36 GearsbeingShiftedintoSecond

④ AsthepressureofoilatportDincreases，theaccumulatorvalve（3）ispushedintothedirectionindica by血ea汀OW．（Fig．3．37）

Atthesametime，Oilissenttotheclutchpistontoengagethesecondclutch（4）tocompleteshif（ing・

−46−

Flg．3．37 GearsCompletelyShif（edintoSecond （2）WhengearSareShifted打omsecondinto重rst ① Theoilfromtheclutchpistonofthesecondclutch（4）flowsthroughportDtoactonthecheckvalve（2）・ ② TheoilatportDflowsthroughorifice▼一a▼一tothedraincircuit，thusal1eviatingshockduringshifting・

Fig．3．38 WhenShif［edfrom2ndintoIst

−47−

乱 丁brqueConverterRelierValYe

ThisvalvecontroIsthepressureofoilcomlngintothetorqueconverter，anddrainsexcessoilwhenthe SPeCi丘edoilpressureisexceeded・

② whentheoilpressureatportAexceedsthespecinedvalue，theoilflowingintoportBthroughtheorifice

一一a▼一ofthetorqueconverterreliefvalve（2）shiftsthetorqueconverterreliefvalve（2）intothedirection indicatedbythearrow．TheoilatportA幻owsthroughportCtothetransmissionforlubrication discharged・

Fig．3．40 TbrqueConverterReliefV山veinOperation

一48一

，．Eme喝enCyManualSpooIs IfanySOlenoidvalvefhilstooperatenomal1yduetoaproblemintheelectriccomponentsorwlrlngOfthe tranSmissioncontroIsystem，itispossibletooperatethetranSmissioncomtroIvalvemechanical1ywiththis

SPOOl．ThedirectionalspooIsandspeedcontroIspooIsarerespectivelyprovidedwithemergencymanual SPOOIssothattheloadercanbemovedtoanOuトOf−trafBcareaforservIClng，ifaJlySOlenoidvalvefails・ Note：Ihecareshouldbeexercisedwhenusingtheemergencymanualspool．

Operation

（1）Emergencymanualspoolinnormal

2

3

position

Whenthesolenoidvalveoperatesnormal1y， thespool（3）iskeptatthisposition．Theoil

ffomthedirectionalandspeed−ChangespooIs （1）enterportA，butitisblockedupbythe SOlenoidvalve（2）．

PRESSURE REDUClNG VALVE

椚83．41

（2）CllltCh

2

OFF●

Whenthe、emergenCymanualspool（3）is

PuShed aboutlO mminto the direction indicatedbythe arrow，theoilatportAis PreVented，irrespectiveoftheoperationofthe SOlenbidvalve（2），from幻owingtoportB，SO thattheclutchisdisengaged・

REDUC暮NGVALVE 椚g．3．42

（3）Clutcbt ON

Whentheemergencymanualspool（3）is Pulled upaboutlOmmintothe direction indicatedbythearrow，theoilatportAis drainedtoportB，irrespectiveoftheoperation Ofthesolenoidvalve（2），thusputtingthe Clutchinengagement． REDUC］NGVALVE

椚g．3．43

ー49一

3

10．LnbdcatingOilBypa5SValYe

Whiletheloaderistravelinginfburthgear，thetransmissiongearsrotateathighspeedssothattheresistance

OfthetranSmissionlubricatingoiltostirringmcreases・Forthisreason，Whentheloaderisplacedin8）ur（hgear， thelubricatingoilotherthannecessaryisbypassedintothetransmissioncasetoreduceoutputloss・

Operation （1）F川rthcl雨Chdisengaged ① whenthefourthclutchisdisengaged， nopressurizedoilactingontheport 一▼a一一ofthespool（1）sothatthespoolis

keptbythesprlnginthedirection indicatedbythearrow． ② Theoilfromthegearpumpisblocked upbythespool（1），SOthattheoilis directed to the transmission for lubrication．

椚g．3．44

（2）Fourthclntchinengagement

① whenoilflowsintothefour（hclutch，

pressurized oil flows through the fourth−SPeedspool（2）totheport． a Ofthespool（1）．

② As the portlTa一†is fil！ed with PreSSurizedoil，thespool（1）moves

intothedirectionindicated bythe arrow，againstthespringforce・

③ Theoilfromthegearpumpisrouted totranSmissionfbrlubricationand the drainport 廿 ・

椚g．3．45

ー50−

u．OperationorT柑nSmissionVal▼einForwardlst ① neshifLleverisplacedintheforwardlst−Speedposition，thesolenoidvalves（1，2）areactivated． ② neoil丘omthepumP（7）usuallytakesthreeroutes，butflowsmainlytotheclutchcircuitduringshifEing・

③ Thkingoneofthethreeroutes，theoilflowsfromthemainreliefvalve（3）throughthetorqueconverter， pasttheconverteroutletvalve（4）andtheoilcooler（5），tOtheinletportsofthelubricatingpump（6）and thetorqueconverterchargingpump（7）・ ④ Theoildirectedtothepilotpressurereducingvalve（9）passestheor道ceofeachspeed−Changespoolto thesolenoidvalve．However，Sincethesolenoidvalves（1，2）oftheforwardspool（10）andthe重rst−Speed

spool（11）areinactivation，theoilpassingtheorificeisdirectedtothedraincircuit・Thiscausesa pressurediffbrentialbetweenportAandportB，Whichovercomestheforceofthesprings（12，13）toall

theoiltoflowtotheclutchport． ⑤ Anotherflowpassesthepriorityvalve（14）andthequickreturnValve（15），throughori銭ce

a

，PaStthe

forwardorreversespool（10）andthespeed−Changespool（11），tOthefbrwardclutch（14）andthe丘指t− Speedclutc血（15）．

⑥ Duringtheearlyphaseofoil皿owingtotheclutchmit，thepassageofoilthrough0rifice一甘一causesa

PreSSuredi飴rentialbetweenportCandportDtoshiftthequickretumvalve（15）totheright，thusfbrci theoilatthebackofthepiston（16）tothedraincircuitE． ⑦ whentheforwardand丘rst−SPeedclutchesaremledwithoil，thepressuredi脆rentialbetweenportsCand

Ddisappearssothatthevalveisretumedtothelef【duetothedifferenceinsectionalarea，thusclosingt draincircuitE．Atthistime，theclutchesare鎚1edwithoil，butthespecifiedpressureisnotyetcreated・

⑧ TheoilatthebackofportDflowsthrough0rificelTb toreachtherearpartofthepiston（16），thusforcing ittotheright．Theclutchoilpressureisthusgradual1yincreased．Whenthepiston（16）reachesitsst end，thespecifiedclutchoilpressureisreachedtoengagetheclutchunitcompletely・

−51−

Flg・3・460perationofTranSmissionVilveinForwardlst

−52−

12．PilotOilFilter

OUT

IN

◆

◆

SectionaIⅥewAA

L E

3．CASE

Fig．3．47 PilotOilFilter

ー53−

3．2．3TRANSFER

Thetransferisinstalledontheoutputsideofthe transmissionandboltedtothetransmissioncase．

1．TRANSMISS10NOUTPUTSHAFT 2．TRANSFERINPUTGEAR（46T） 3．TRANSFERIDLERGEAR（39T）

4．IDLERGEAR 5．OUTPUTSHAFr 6．REARCOUPLING 7．STRAINER 8．OUTPUTGEAR（41T）

9．FRONTCOUPLING

Powernow ① Thetransmissionoutputshaft（1）issplinedto thetranSferinputgear（2）．Poweristransmitted throughtheidlergear（3）totheoutputgear（4） andthentotheoutputshaft（5）・

② Thepowerdeliveredtotheoutputshaftis dividedintotwonows：Oneissent

throughthe

frontpropellershaf（tothe丘ontaxle・

③ Theotherpowernowpassesthroughtherear PrOPellershafttotherearaxle・

椚g．3．4＄ Ⅵms鎚r

−54−

3．2．4TRANSMISSJONCONTROL

l．GtmeralDescription ThetransmissioncontroIsystemisanelectrictype．Operationofthechangelever（transmissipncontroI SWitch）sendsasignaltooperateacombinationoftransmissionvalves（SOlenoidvalves）tocontrolthedirection Ofnowtotheclutchilnit，thuscontrollingtravelingspeed．Speedrangesarechangedwiththeauto transmissioncontro11er（ÅrC）sothatsomerangescanbeautomatical1ychanged・ neelectriccontroIsystemconsistsofachangelever，ArCunit，down−Shif【switch（DSS），Clutchcut−0ff

selectorswitch，andsensors．ThetransmissioncontrolunitisprovidedwithaDSS（downーShif［）mechanismand transmissioncut−0ffmechanism．1tisalsopossibletooperatethetranSmissionmanual1y，iftheÅrCfhils． Note：Forrnanualtransmissionc6ntrol，re飴rto一▼（3）MeasurestobetakenwhenATCfails一▼onpage59．

（診N（Ye‖ow）

（Whi吋3

（W仙e）2

（W柚e）1

（B暮ack／Red）R

（Red）COM

Dovdopmontofcontactpoinls

椚g．3．49 Changebver

ー55−

◎

Notes： B＞Potentiometer：installedonacceleratorpedal（SeeFig．2．10．） 医＞tOSPeedsensor

駐：＞Pressureswitch（触・tranSmissioncut−OfD OFFwhenparkingbrakeisinoperation，ONwhenreleased（SeeFig・4・12・） 匠＞Proximityswitch（払rinching） OutputtransistortumsONwhenleftbrakepedalispressed・（SeeFig・4・3・） 駐＞

ONduringnormaloperation（lnchingisavailable），OFFforstar（ingongrades（Noinchin available．）

Fig．3．50 ElectricCircuitDiagramfornansmissionControl

−56−

Notesl：Instal1edontransmission（transfer）．（See Fig．3．8．）

2：Gapagainstmatingpart：1essthan1・7mm

Fig．3．51SpeedSensor

（1）DSS（down−Sh拍switch）mechanism

TheDSSmechanismmakesdiggingeasy．Whenthe DSSswitchispressedduringdigglngOPeration，gearS areautomaticallyshiftedintothelstgearposition， allowlngmOreefBcientandspeedierloadingoperation． The DSS mechanism consists ofthe down−Shift

Switchincorporatedintotheboomleverknob，andthe ATCunit．

Fig．3．52 Down−ShiftSwitch

Operation

Whenthedown−Shif【switchispressedduringdiggingoperation，withthechangeleverin2ndgearforward

thetransmissionisautomatica11yshif（edintothelstgearpositionbyoperationoftheATCunit，allowlngmO

horsepowerconcentratedontheloadingoperation． Whenthechangeleverisshiftedintoreverseaf（erscooplngaload，thetranSmissionisretumedinto2nd

gearbyoperationoftheATCunittoquickenreversetravel．

Inshort，Withthechangeleverin2ndgearfbrward，itispossiblefbrtheoperatortochangethebreak−Out fbrceandtravelingspeedsimplybycontrollingtheboomlever（down−Shiftswitch）duringdiggingoperation．

ー57−

（2）取ansmissioncut−Ofrmecbani5m

netransmissioncut−Offmechanismisusedintwoways：withtheparking（emergency）brakeandwiththe inchingmechanism・ a．Workingwithparking（emergency）brake

Apressureswitch（transmissioncut−0ffswitch）isinstal1edontheportB（Springbrakeport）oftheparking brakevdve．

Whentheparkingbrakeisapplied，thepressureswitchistumedOFF・ThetraTISmissionvalve，s RSOLarenotactivatedbyoperationofthetransmissioncutrelay・Therefore，aSlongastheparkin （emergency）brakeisinapplication，thetranSmissionstaysneutral，SOthattheloaderwon tstarteve changeleverisoperated．Crhispreventstheloaderfromstartingwiththeparkingbrakeapplied・）

b．Workingwithinchingmechanism Aproximityswitch（inchingswitch）isinstalledontheleftbrakepedal1inkandwiredtothetransmissio relay．Whenthebrakepedalsarepressed，theproximitySWitchoperatestoputthetranSmissioninneutralb OPerationofthetransmissioncutrelay（inchingmechanism）・

Theoperatorcanselectbetweennon−inchingandinchingofthebrakepedalsbyuslngtheclutchcu Selectorswitch（inchingselectorswitch）intheoperator scompar（ment・ ・Non−inchimg（伽rstartingupongrades）

Whentheinchingselectorswitchistumedtothenon−inchingmode，neithertherightorthelef【brakeped deliversinchingfunction・Depressionofthebrakepedaldoesnotputthetransmissioninneutral，butslow loaderdownbyenginebraking・

Whenscooplngearthandsandorrocks，yOuCanOPeratethebrakepedalsbyyourleftfoottofinetunethe travelingspeed，keepingyourrightfbotontheacceleratorpedal・ Itisalsopossibletosmoothlystartupongradeswiththeinchingselectorswitchinthenon−inchingmode・

・Inching（nomaloperation） Withtheinchingselectorswitchintheinchingmode，theleftbrakepedalworksasaninchingpeda althoughtherightbrakepedaldoesnothaveinchingfunction・Whentheleftbrakepedalispressed，

transmissionisputinneutral・ThisallowstheoperatortoquickentheboomralSlngSPeedbydepress acceleratorpedal，withthebrakepedalpressed・

一58−

（3）Measuretobet且kenwhenÅrC飴ilstooperate（manualtransmission） 旺theArCfhilstooperatenormallyforanyreason，theloaderwon ttravelbecauseyouannotcontrolthe

tranSmissionproperly．lnsuchacase，uSethewireharnessformanualoperationinsidethevalvecoptrolboxt ChangethetranSmissioncontrolunitintothemanualmode．

WiththetranSmissioncontrolunitinthemanualmode，yOuCantraVeltheloaderatthesamegearasthe Changelever．DSS飴atureisalsoavailable・

Note：Fortheelectricalcircuitdiagramfbrmanualoperation，reftrtoFig・3・50・

Procedure伽rputtingtransmissioncontrolunitinmanualmode ① TumthestarterswitchOFFtoshutofftheengine．Tumtheloader ② Removethecoverfromtherightsideofthevalvecontrolbox．

selectricalsystemOFE

③ Removetheconnector丘omthecorLneCtOr2（CN2）oftheArCmit，andinsertitintothecotmector（A）of

themanualoperationwireharness． Note：Donottouchthecormectorl（CNl）andconnector3（CN3）oftheÅTCunit． ④ ThetranSmissioncontrolunitisnowinthemanualmode． ⑤ げyouwanttoretumthetransmissioncontrolmitintotheautomaticmode，retumtheconnectorsintotheir Originalpositions，uSlngthesequenceoppositetotheabove．

Fig・3・53ManualSpeedChange

ー59−

2．AutomatieTransmissionController（ATC） （1）Generaldescription

Theautomatictransmissioncontroller（ATC）automatical1ycontroIsthetransmissionaccorqingtoth travelingspeedoftheloaderandtheamOuntOfacceleratorpedaleffbrt・ TheÅTCdeliversthefo山0wingfbatures： ① Theloaderalwaysstartsin2ndgear．Thetransmissionautomatical1yshiftsintoIstgearwhentheDSSis operatedorthechangeleverisshif【edintoIst・

② neDSSisreleasedbythefbllowingoperation（fromlstto2nd）・ ・Whenthechangeleverisshiftedintoforward，neutralorreverse・ ・Whenthechangelever，sspeedrangeischanged・ ・Whentheparkingbrakeisapplied・

③ rIbmakeitpossibletouseenginebrakingwhengoingdownhill，thetransmissionwon

tupshift

amountofacceleratorpedaleffbrtisW4tol／40fthetotalpedaltravel・

④ whenthechangeleverismovedtoalowergearduringtraveling，thetransmissionalwaysshiftsd alongthespecifiedshiftingpattern・ForexamPle，eVenifthechangeleverisshifted丘・Om4thtoIstduring fasttraveling，gearSWOn，tdownshif（untilthetravelingspeedreachesthepointatwhichgearsneed Changed・ThisftatureprotectsthetranSmissionclutches・

⑤Itofftrskitk−downfunctionwhichquickenstheshift−downOfgearswhengoinguphi11・（Seegearshift PattemChart・）

a．ChangeleverpositionsandgearShiftingpatterns（bothfwd／rev）

Leverposition

Shif（ingpattems

DSSoperation

1st

Fixed to Ist

Inoperative

2nd

Fixed to 2nd

Fixed to Ist

3rd

Antomaticshiftingbetween2ndand3rd

4th

Automaticshif（ingbetw占en2ndand4th

FixedtoIstwhentraveling belowlOkm／b．

Thechangeleverpositionshouldbeselectedaccordingtoworkconditions・

b．RelationshipbetweenacceleratorpedalefhrtandshiftingpatternS（bothfwd／rev）

4 3

4

4

′／ ／

2

4

1

4

／ ′／

4 0

／

亡0−竜一吋POdLO一望￠一〇〇Od−〇一uコ0∈＜

10 Travelingspeed（km／h）

ー60−

C．Gearsb的ingpoints

Thegearshiftingpointsarefhctoryaqiustedasfollows．Ⅵ血esin（）representinputfrequenciesfromth Speedsensor・

Dmshi余ing

Upsbi錯ng

1st→2nd 2nd→3rd 3rd−●4th 4th−■3rd 3rd一→2nd 2nd一→1st

Duringtraveling

（ ）

10．5

17．2

14．2

（117）

（191）

（158）

15．7

Duringkickdown

（ ） （ ）

（ ）

（174）

7．5

3．3

（84）

（37）

9．0

4．8

（100）

（54）

Unit：kmnl．V山uesin（）areexpressedinHz． （2）OuterviewsofATCunitandinternalcircuitdiagratn

SPAREFUSE（5A）

Fig．3．54．ArCUnit

ー61−

（ATCBOARD）

ごニニ＝コE‡≡三三∃ く ￣

（コ

∑二ニコO

r

ー⊥∠＿＿−

r￣￣丁「

∠＿＿＿＿」

c,

′￣ヽI ′−、 ノ し． しノ r r￣￣￣「

l

⊂二：ニニ：＝ニコ

」＿

⊂−＿＿−−」 「−一一

（〕こコ

‥￣

「￣￣ ￣￣￣￣￣「 l一一−■−■￣ ￣￣1

〔

く∽￠Sコ﹈

打巨コニ至ヱ‡‡］一 ￣￣￣￣￣ 1コrJ￣

￣ ￣−￣￣￣￣￣￣￣￣￣

l

！cN3； 」＿＿＿＿＿＿＿−＿＿」

⑳ T￣￣T

ll

CN2 」＿＿＿＿

」＿J」＿． J

＿＿＿＿＿＿＿」

E ：CNl し−＿＿

ONTERNALCIRCUITDIAGRAM）

24V （CNl−3）

1StSOL

SPEEDSENSOR （CN2−13） SENSORGROUNDING

（CN2−14）

2ND SOL

（CN2−12）

（CN2−15）

POTENTlOMETER POWERSUPPLY

3RD SOL （CN2−16）

（CN3−6）

POTENT］OMETERFOR AMOUNT OF ACCELERA‑ TORPEDALEFFORT

4TH SOL （CN2−17）

（CN3−7）

POTENT］OMETER GROUNDING（CN3−8）

GND（CNl−2） 1STSW汀CH（CN2・5）

2NDSWITCH（CN2−6） 3RDSWITCH（CN2−7） 4THSWtTCH（CN2・8）

FWDSWITCH（CN3−3） REVSWtTCH（CN3−4）

DSS （CN2−4）

（CN2−1）

PARKING

（CN2−9）

￣￣（CN2二3）

Fig・3・55ATCBoardandSchematicDiagramforlntemalCircuit

−62−

（3）In5peCtiom

a．Inspectinginput（血dngATCoperation）

① hispossibletoinspeCtinputwhiletheÅrCisoperating，bycheckingtheほD￠−digitnumbers）andthree SWitchesinsidetheÅTC．

② opentheinspectionwindow．

③ Forthelocationsoftheswitchesandpar（S，Seetheschematicdiagramfortheinternalcircuitandtheprin OnthePWB． SWlisusuallyusedforchangingchannels；SW2forincreaslngSettings；SW3fbrdecreaslngSettings・ ④ nehstdigitontheu三Drepresentsthechannelnu中ber・ ⑤InIhetablegivenbelow，一一△▼一signifiesablank， ＊二 anynumber・Thevaluesinthe 一●

columncanbe

ChangedwithSW2andSW3． Description

Operation

Numbers on LED

Star（erswitchON T71enumber■ 200 1representsMode）890 scontroIprogram・

0△200

nenumberoftimestheprogranhasbeenchanged．

△＊＊＊＊

SWlON

1＊＊＊＊

SWlON

Notused

△0037

SWlON

20117

SWlON

●加d→1st，Sh的hgpoint鮎que爪印 ●2nd→3rd，ShiftingpoiIltfrequency

△0084

SWlON

●3rd→2nd，Shi餌喝pOht丘eqⅥenCy

30191

SWlON

●3rd→4th，Shiftingpointfrequency

△0158

SWlON

●4th→3rd，Shi餌喝pOint丘equency

4 0054

SWlON

△0100

SWlON

50174i

SWlON

●2nd→1st，kick−downShif（ingpoint丘equency ●3rd→2nd，kick−downShif（ingpointfrequency ●4th→3rd，kick−downshiftingpoint丘equency

△△011

SWlON

NotⅥSed

6＊＊＊＊

SWlON

NotllSed

△＊＊＊＊

SWlON

7＊＊＊＊

SWlON

hlPutfrequencyfromspeedsensor（Hz） AmountofacceleratorpedaldepressionQ）Otentiometer）0−4

△＊＊＊＊

SWlON

Notused

8＊＊＊＊

SW1 ON

18陣】＊l剰ト→0＝Ch叩gelvrspedangsrealopn 0＝ParkingbaeON，DSF 1＝Challgeleverinlst 2＝Changeleverin2nd 3＝Cllangeleverin3rd

】

4＝Cll叫geleverin41h 0＝Cha喝eleverinne雨ral

1＝Changeleverinforward

2＝Changeleverinreverse

△＊＊＊＊

SWlON

9＊＊＊＊

SWlON

△＊＊＊＊；

SWlON

1＝ParkingbrakeOFF，DSSOFF 2＝ParkingbrakeON，DSSON 3＝ParkingbrakeOFF，DSSON Outputs匹edmnge：0−4

bitiaJsettingofacceleratorpedaldepression：L IJlitiaJsetlingofacceleratorpedaJdepression：H

［△△△1

SWlON

Notused

△0011｛ ］0010！

SWlON SWlON

Frequencyperlb孔血onspeedseれSOr Trav占1iIlgSPeedatwhichDSSbeginstooperate如

△△△△△

SW1 ON

Notused

Retllm

0△2pO

SWlON

Thenumber−1200−1representsMode）890 scontroIprogram．

−63−

b．Inspectingoutput（ATCnotinoperation） ① HoldingSWldepressed，turnthestarterswitchtoONforinspectingoutputwiththeÅrCnotinoperation・ ② whentheATChasbeenputintheoutputcheckmode，theÅTCwon tretumtotheoperationmpdeunles thestarterswitchisoncetumedOFF・ATCoutputchecksmustbedonewiththeenglneShutofL ③ Forothers，thesameasthoseontheprecedingpageholdstrue・ NumbersollLED

Operation

0△200

StarterswitchON SW1 ON

Description

Sameastha10npreCedingpage 7＊＊＊＊

SwlON

△＊＊＊＊

SWlON

Notused

8＊＊＊＊

SWlON

△＊＊＊＊

SW1 ON

Sameasthatonprecedingpage Outputcheck

SW20N SW2 0N SW2 0N SW2 0N SW2 0N SW2 0N SW2 0N SWZ ON SW2 ON

Amountofacceleratorpedaldepressionbotenliometer）0−255

△0000＝nOOutput △0001＝1stONP．EDlamp sPD7comeson） △0002＝2ndON（LEDlamp sPD6comeson） △0003＝3rdON（LEDlamp sPD5comeson） △0004＝4thON（LEDlamp sPD4comeson） △0100＝nOtuSed △0200＝nOtuSed（LEDlamp sPD13comeson） △0300＝nOtt）Sed（LEDlamp sPD12comeson） △0400＝nOtuSed（LEDlamp sPDllcomeson） △0500＝nOtuSed（LEDlamp sPD2comeson）

SWlON

Sameasthatonprecedingpage

c．Notesamdcautionstobetakenwheninspecting

① shiftingpointscanbechanged，butlimitsmustbeprovidedwithineachspeedrange・Whereveran

shiftingpointischanged，al1theshiftingpointsmustbecheckedandtheLEDmustbeonceretumedto 0△200 1tostorethechangeintomemory・

Calculationexample：

1kmnliscalculatedasll．1Hz．ForexanPle，Whenyouchangethesettingl17Hz（10・5km几）to128Hz， gearswillshiftatll・5kmh・ ② Donotchangethedipswitch（DIPl）ontheboard；Otherwisethecontrollerunitmight

③ YoucanchecktheoutputspeedrangebyobservingtheLEDlamPOntheboard，Seetheoutputinspect ChartPD4−7．

（4）Others a．Initialsettingofacceleratorpedaldepression（potentiometer）

① ＝01dingtheDSSswitch，ttLrnthestarterswitchtoONtoputtheÅTCunitintheinitialsettingmode二 Presstheacceleratorpedalseveraltimes・TumthestarterswitchtoOFFtoendtheinitialsettingmode・ ② lfinitialsettingisnotcarriedoutproperly，thetranSmissionwon tkickdownOruPShiftproperly・ b．Cautions

・ThefusefortheboardmustbeacapacityOf5A・ ・Rememberthatapplicationof24Vtoaconnecterterminalotherthanthepowersupplywilldamage ArC．

一64−

3．3TRANSMISS］ONOILC］RCUL打r10N ROUTES l．GモneralDescdption

Oilisdrawnbythedoublepumps丘omthetransmissioncasethroughthestrainer・Theoildischarged

thelubricatingoilpumpISuSedforlubricationofthetransmission・Theoildischargedfromthechargingpump

flowsthroughtheoil別tertothetranSmissionvalve，fromwhichitisdistributedtothetorqueconverterandt transmissionclutches． 28

29

38

Fig．3．56 0ilCirculationRoutes

−65−

32

31

34

23．3RD−SPEEDSPOOL

乙 STRA∬VER

11．QUICKRETURNVALVE 12．TORQUECONVERTE

3．mRICATINGOILPUMP

13．TORQUECONVERTERRELIEFVA⊥VE 25．1ST−SPEEDSPOOL

4．TORQUECONVERTER

14．TORQUECONVERTEROUTLET VALVE 15．OmCOOLER 16．LUBRICATINGOmVALVE 17．TRJWSMISSIONLUBRICATION 18．LUBRICATINGOLLBYPASSVAm 19．PRESSUREREDUCINGVALVE 20．REVERSESPOOL

26．EMERGENCY MANUAL SPOOL 27．SOLENOIDVALVE 28．REVERSECLUTCH 29．FORWARDCLUTCH

9．PR10RmVAm

21．FORWARDSI〉00L

33．ACCUMULATOR

lO．MODULATINGVALVE

22．4TH−SPEEDSPOOL

34．1ST−SPEEDCLUTCH

1．TWSMISSIONCASE

CHARGING PUMP 5．OmFILTER 6．TRANSMISSIONMAN

REL正FVALVE 7．PILOTFILTER 8．PILOTPRESSURE REDUCrNGVALVE

Flg．3．57 HydraulicOilCircuitDiagram ー66−

24．2ND−SPEEDSPOOL

30．4TH−SPEEDCLUTCH 31．3RD−SPEEDCLUTCH 32．2ND−SPEEDCLUTCH

2．OilFilter

TheoilBlterislocatedinthedischargelineofthechargingpump．Theoilflowsthroughthe別terelement fromoutsideintoinside，andthe餌teredoilisdeliveredtothetranSmissionvalve．

Whenthe鎚terelementbecomesclogged，thebypassvalveoperateStObypassoiltotheoutletportsi

withoutpassingthroughthemterelement．

Bypassvalveoperatingpressure：3・5±0・28kg／cm2

BYPASSVME

Sectional view BB

ELECTRICINDICATOR （NOTUSED）

Sectiona】扇ewAA

椚g．3．5＄ OilFilter

−67−

3．4 PROPELLERSHAFT

Cross joint

取pe：

SpacingbetweenflaJlgeSXWeight rrbrqueconverter−tranSmission：

455孟mx47kg

7lansmission一缶ontaxle：

l，671芸mx137kg

Ttansmission−rearaXle：

489±2mmx49kg

Thepropellershaf（SarelocatedbetweenthetorqueconverterandthetranSmission，betweenthetranSm andthefrontaxle，andbetweenthetransmissionandtherearaxle．

Attheffontaxlesidearetwopropellershaftsconnectedinseries，Withtheffont−Sidepropellershaft connectedthroughapillowblocktothefrontframetopreventvibrationduringarticulating・

Thepropellershaftsabsorbthechangeindriveangleandthechangeinlengthwhentheloadertravels， ensurlngSmOOth丑owofpowerfromthetransmissiontotheaxles・

Notes：B＞ぢ＝コMountingbolt：13．4−15．9kg−m 医＞ぢ＝コMountingbolt：21・0−22・5kg−m

14＝ゝThreadedarea：LOCrITE262 超⊃ゝ

匡＞（芯＝コMountingbolt：18・6kg−m 1．PROPELLERSHAFr

4．TORQUECONVERTER

7．PROPELLERSHAFr

2．WSMISSION 3．PROPELLERSHAFT

5．FRONTAXLE 6．COVER

8．REARAXLE

Flg．3．59 SchematicLayoutofPropellerShaft

ー68−

3．5DR］VEAXLES（FRONTANDREAR）

Ddvhg： Frontaxle：

4−Wheeldrive

Reara幻e：

Tmmion，餌山一幻oa血gtype

Frame−fixed，fu11−nOatingtype

Reductiongearanddifftrential Model：

TCM690−35

1サpe：

Ring＆Piniontype，2−Stagereduction

Di蝕rentialgearbox：

Ba再oshape

Di飴rentialgearS：

Straightbevelgears Limited slip type

Difftrentiallimiter：

Finalreductiongear： Model： 吋pe：

Oilcapacity：

TCM690−30

Planetary gear 180P eachforfrontandrear

Ⅵ屯ight

Axles： Dif托rential：

Hubandbrake： Axleshaftberpiece）： PlanetaryCarrier（perpiece）：

3，574kg（丘ont），3，414kg（rear） 653kg（丘ont），665kg（rear）

731kgeach 68．5kg 175 kg

3．5．1DR］VEAXLE

Thedriveaxleconsistsofthedi脆rential，aXlehousing，aXlesha往，貢nalreductiongearandawettypeb unit．Theinputshaftofthefrontaxleisprovidedwithaparkingbrake（drytype）・ ThepowerfromthetranSmissionistransmittedthroughthepropellershaf（StOthefrontandreardriveaxle

Thepoweristhensentthroughtothedifferentialwhereitisdividedintotherightandleftaxleshaftsand distributedtothe貢nalreductiongearandwheelhuboneachshaftend，thusdrivingthewheel・ Note：Forth畠brakeunitandslacka可uster，refbrto 4．BRAKESYSTEM．

一69−

Axlemount

The丘ontaxleisdkectlyboltedtothefrontframe．Therearaxleisatrunnion−SuPpOrtedtypewh

boltedtotherearframewithtwoaxlesuppor【satthefrontandrearpartsoftherearaxle・ nerearaxlepivotsupanddownaroundthecenterlineofthediffbrentialwhenthewheelsmoveupand down．

Comparedtotheconventionalcradle−SuPPOrtedmount，thetrumiontypefeatureslessdisplacementoft loaderbodywhentheaxlesmoveupanddown・ltissuitableforuseinalargevehiclewhichhasdriver compar（mentatarelativelyhighplaceandissuqecttolateralrollingfromtheground・

Notes‥ 駐＞ぢ＝＝コ374kg−m

椚g．3． O AxleMount

ー70−

12＜司

∨始W100ki喝什omB

Notes：駐＞ぢ＝コ、9kg−m

匿＝＞ぢ＝コ亜kg−m

駐＞紹＝ゝBus旭g血ersu血ce：Grease 匡＞Af（ergreasing，instal1plug・郎plyLOCrITE5720nthreadedareaofplug．

1．AXLESUPPORT（REAR）

5．1 0叩−RING

9．BUSHING

2．COVER

6．BUSHING

lO．mNER

3．THRUSTPL＃IE

7．DUSTSEAL

ll．LDUSTSEAL

4．THRUSTWASHE

8．AXLESUPPORT（FRONT）12．PLUG

Fig．3．61AxleSupport −71−

5 6 7

Notes：

16 17

匿＞ぢ＝コ15kg−m

圧＞ぢ＝コ9kg−m

B＞ぢ＝＝コPlanetcarrierfittingbolts（2fbreachside）：23kg−m

匠＞ぢ＝コ46kg−m

匠＞ぢ＝：コ78kg−m

駐＞紹＝ゝTheadedarea：LOCrITE262 駐＝−Parkingbrakeadjustingprocedure Referto▼一4．2．3PARKINGBRAKE．

1．DIFFERENTIAL

7．W■HEEL

13．AXLESHAFr

2．打」RⅢNGBRAKE

8．CAI）

14．AXLEHOUSING

3．BRAKECARRIER

9．THRUSTPLATE

15．SPRINGBRAKE

4．PLATE

lO．SUNGEAR

16．SLACKADJUSTER

5．PLAmGEAR 6．SHAFT

ll．PLAN7TrCARRIER

17．BRAKETUBE 18．CLEVIS

12．HUB＆BRAKE Fig．3．62 FrontAxle

一72一

fC＝ゝ∴伽eaa去dareaofplug： LOCTIm72

3 4 5

8 910

13 14

11

12

Noles：駐＞ぢ：：＝コ9kg−m

匿＝＞ぢ＝コ15kg−m

B＞（忘＝コPlanetcarrier伽ingbolts（2foreachside）：23kg−m

駐＝−ぢ＝コ46kg−m

臣＝−ぢ＝コ78kg−m

B＞14＝ゝnreadedarea：LOCrlTE262 1．DIFFERENTIAL

6．CAP

2．AXLESUPPORT 3．PLANETGEAR

7．THRUSTPLArE

4．SHAFr

9．PLAmCARRIER

5．W■HEEL

lO．HUB＆BRAKE

8．SUNGEAR

椚g．3． 3 RearAxle

ー73−

11．AXLESHAFT 12．AXLEHOUSING 13．SLACKADJUSTER 14．BRAKETUBE

匠＞910111213

I4＝ゝPlug：LOCTITE572 正＝ゝnreadedareaofbolt：LOCTITE262 Notes：匠＝＞ぢ＝コ5kg−m

匡＞ぢ：：＝コ9kg−m

匪＞ぢ＝＝コ23kg−m

臣−ぢ：：：：コ15kg−m

匠＞在＝コ47kg−m

匠＞正⊃ゝBrakehousinginnersurfhce：NOKLUBAI・60（befbreassembling） 匡＞Donotapplygreaseon 一0

−ring・Applygearoilonslidingsurface・

匝＝−lnstal1platesonbrakehousing，aligningtheirtoothmissingareawiththatofthedrainpart・ 匝＞

① Assemblespindle，internalgearhub，andretainerandtemporari1ytightenwheelhubhold boltstolOkg−mOftorque・ ② RemoveboltsandretainerandmeasurethegapYwithadepthgauge・

③ selectappropriateshimstomakethegaptomeasureY：3：讐諾・Assembletheshimsand retainerandtightentheboltssecurely・ 1．BRAKEHOUSING

8．SEALREmNER

15．BRAKEDISK

2．WHEELHUB

9．FI−OArlNGSEAL

16．BRAKEPISTON

3．RINGGEAR

lO．GUIDEPIN

17．DRING

4．INTERNALGEARHUB

ll．SPRING

18．ENDPI一ÅrE

5．Wl‡EELHUBHOLDBOIJ

12．PLÅrE

19．SPINDLE

6．mNER 7．SHIM

13．DRAINPLUG

20．BLEEDER

14．FLÅrE

Fig・3・64 SectionalViewofHubandBrake −74−

3．5．2 D］FFERENTIAL

nedi蝕rentialofthisloaderisalimitedslipdi飽rentialwithadi蝕rentialactionlimitingdevice，andis integralwiththereductiongear・ ¶1ePOWer丘omthepropellershaftpassesthroughthedriveplnlOntOtheringgeartothedi脆rentialcase，

fromwhichitdividesintotherightandlef‖hroughthesidegearstotheaxleshafts・Thespeedreductionofthe powerisaccomplishedbetweenthedrivepln10nandtheringgear・

Operationofdi馳rentia15

（1）ConYemtionaldif鮎rential lngeneral，Wheelloadersusethesametypeofdifferential，Ortheconventionaldifferential，aSgeneral paSSengerCarS・

① whiletheloadertravelsstraightahead，theringgear，di脆rentialcaseandsidegearsrotatetogetheras unit，Withthepiniongearsinsidethedi脆rentialgearcasenotrotating・Thepowerofthesamespeedis thentransmittedfromtherightandlef（Sidegearsthroughtheaxleshaftstothewheels・ ② whentheloadermakesatum，therightandleftwheelsrotateatdi蝕rentspeeds，thepiniongearsinside

thedi蝕rentialgearcaserotatearoundtheirownaxesaccordingtothedi脆renceinspeedbetweent rightandlef【sidegears・

Duringtravelingstraightahead

Whenmakingaturn

1．PINIONGEAR 2．SIDEGEAR 3．AXLESHAFr 4．DIFFERENTIAL CASE 5．SPⅡ）ER 6．DRlVEPINION 7．mNGGEAR

Fig．3．65 0perationofDifftrential （2）Limitedslipdi脆rential（L．S・D）

Whee1loadersof（enneedtoworkonabadgroundconditionlikeonsandorinaswampyplace・Onsucha

badgroundcondition，aloaderwiththeconventionaldi脆rentialcanskid，rnakingitimpossibletodeliveri

performance・lnaddition，thetireswi11alsowearoutprematurely・Tbpreventthisfromhappenlng，themod 890−3loadercomesequlPPedwithalimitedslipdi脆rential・Thelimitedslipdifferentialhasclutchdisks

betweeneachsidegearandthedifftrentialgearcase，tOlimitthedi蝕rentialoperationsothattherightandl

tiresrotateatthesamespeedduetothefrictionalresistanceoftheseclutchdisks・

−75一

紹＝ゝTheadedareaofbolt： LOCTITE262 Notes：

駐＞ぢ＝コ′7kg−m

駐＞ぢ：：＝：〕16・2kg−m

駐＞ぢ＝コ46kg−m

匡＞ぢ＝コ78kg−m

駐＞ぢ：＝＝】115kg−m 匝＝＞Pinionbearingpreload：1・0−1・5kg−m（SPaCeradjustment） 駐＞Sidebearingpreload：1．0−1・5kg−m（adjustment）

医＞Ringgearbacklash：0．46−0．66mm（adjustment） 1．FLANGEDHALF

8．SHIM

15．SIDEGEAR

2．OUTERDISK

9．0ILSEALmNER

3．ImRDISK

lO．FLANGE

16．PLAINHALF 17．ADJUSTINGNUT

4．ADJUSTINGNUTLOCK 5．CAP

ll．THRUSTWASliER 12．SPIDER

18．DIFFERENTIALCARRIER 19．DRIVEPINION

6．RINGGEAR 7．SPACER

13．NEEDLEROLLER 14．PINIONGEAR

20．BEARINGSUPPORT

Fig．3．66 FrontDifferential

ー76一

21．BRAKEDISK

亘⊂ゝThreadedareaofbolt： LOCTITE262 Notes：

臣＞ E＝：コ46kg−m

匡＞ぢ＝コ7kg−m 匡＞ぢ＝コ78kg−m

駐＞紹＝ゝ115kg−m

匠＝−Pinionbearingpreload：1．0−1．5kg−m（SpaCeradjustment） 匡＞Sidebearingpreload：1．0−1．5kg−m（adjustment）

匿＝−Ringgearbacklash：0．46−0．66mm（adjustment） 1．FLANGEDHALF

8．SHIM

15．SIDEGEAR

2．OUTERDISK

9．0ILSEALmNER

16．PLAlNHALF

3．INNモRDISK

lO．FLANGE ll．THRUSTWASHE

17．ADJUSTINGNUT

4．ADJUSTINGNUTLOCK

18．DIFFERENTIALCARRIER

5．CAP

12．SPIDER

19．DRIVEPINION

6．RINGGEAR

13．NEEDLEROLLER

20．AXLE＆BEARING

7．SPACER

14．PINIONGEAR

SUPPORT

Fig．3．67 RearDi飴rential

−77−

3．5．3 F］NALREDUCT］ONGEARANDBRAKEUN］T

ne鮎alreductiongearisaplanetarygeartypeandprovides鮎alspeedreductionofthepowerfromt englneinthetransmissionline・

ThepoweristranSmittedasfo1lows：

Thesungearsplinedtotheaxleshaftrotatesthethreeplanetgearsinsidetheringgear，therebytranSmitting therotationoftheplanetgearsthroughtheplanetcarriertothewheelhub・

nebrakemitisawetdisktypeandinstal1edoneachwheelhubtoserveasaservicebrake・Thebrakeu consistsofaslacka蜘Ster，diskbrake，andpiping・Foritsoperation，referto一 4・BRAKESYSTEM・

←powe川ow

SectionalⅥewAA

2

4. AXLE SHAFT

1．RINGGEAR（FIXED） 2．SUNGEAR

5．PLANちTCARRIER

3．PLANちTGEAR

6．WTIEELHUB

Fig．3． ＄ Powerflow

ー78t

5 6

7

7．WliEEL 8．SPINDLE 9．DISKBRAKE

9

3．6WHEELASSEMBLY

Tire： Wheel：

35／65−33−24PR山beless（L−4） 28．00Ⅹ33WTB

Ⅵねightberpidce）

980 kg 394 kg

Tire： Rim： lnflationpressure：

3．5−4．Okg座m2

3．6．1TIRE

ThestandardmodelisprovidedwithtypeL−4tireswhichfeatureexcellentresistancetodamageandwear・ Selectappropriatetires丘omavarietyoftiresavailable，aCCOrdingtotheapplicationandpurposeofwork・

netir占sizeisexpressedininches．Thestrengthoftiresareexpressedinplyrating（PR）：forexample，

PRmeansastrengthcorrespondingtothatof24piecesofcottoncords．（PRdoesnotnecessarilystandforthe numberofcordpliesinthetire・）

35 ／ 65 一 トご

33 − 24P 巨

汀readPatto叫

椚83． ，Tire

−79一

3．6．2 WHEEL

newheelconsistsofarimandadiskwhichisboltedtothewheelhub．

Thetireisinstalledontherim，andbothworkasonepleCe．Wheninstauingatireonarim，itisespeCial1 impor（anttOuSearimsuitabletothetire．Useofaninappropriaterimmayresultinashortliftofthetirean

intheworstcasemightcauseaseriousaccident．

Therimsizeisalsoexpressedininches．The貢rstnumberstandsfortherimwidthandthenextonet diameter．

（忘＝コWheelbolt‥∬kg−m

1

2

3

5

4

Sectional扇ewAOB

1．RIM

5．SIDERING

8．LOCKRING

2．AUXILIARYRING

6．HEAVY−DUTYDRlVER

9．，▼0▼▼−RING

3．DISK 4．BEADSEATBA．ND

POCKET

lO．WンゞrERVM−VE

7．HEAVrDUTYDRIVERKEY 椚g．3．70 Wheel

ー80一

ll．HEX．NUT

4．BRAKESYSTEM SenJicebrake やpe：

Frontandrearwheelindependentbraking，Wetdiskhydraulictype

Numberoffluidlines：

2

Brakevalve：

Singlebrakevalve

Diskbrake：

4−Wheelwetmulti−platediskbrake Geartype，KFP2233−14ADCS

Brakepump： Supplytank：

2．4ゼ

Pressuresetting：

Accumulator（9．7B） 65k帥m2

Sa飴けdevic8

Usedasemergencybraking

Accumulator：

Parkingbrakeandemergencybrake Type：

Frontaxleinputbraking，diskbrakewithsprlngCylinder

Note：nLerearPumPOfthetwo−throwpump（POC＆brakepump）isusedasthebrakepump・Forthedetai Ofthepump，refertol17・HYDRAULICSYSTEM・．

▲

PrecautionsbefbrerepairingbrakehydrauIiclines

ThebrakelinesandthepilotvalvecontroIlineofthisloaderareaCtuatedbythepressurizedoiIproduced

intheaccumulaton Befbre畠ervIClngthetubing華，StOPtheenglneandpressthebrakepeda120to40t toreleasethepressurefromtheaccumulatonItIsdangeroustoremovetubingswithoutreleaslngthe pressure．HighpressureOiImightspoutout，CauSingseriouspersonaliqjury・

ー81−

4．1SERV［CEBRAKE 4．1．1BRAKELINE

l．GtneralDescription neservicebrakeisa4−Wheelwettypediskbrake，fuuy−hydraulic（fu11−POWerbrake）type・

Thebrakelineisseparatedintotwolines（frontandrear）afterthesplitcylinder・旺oneofthebrakelinesis damaged，theloadercanbebrakedthroughtheotherline・ neservicebrakesystemconsistsofthebrakepump，reliefvalve，aCCumulator，brakevalve，SPlitcylinder， Slackadjuster，diskbrakeandtubing・

Fig．4．1BrakeSystem

ー82−

Warningsystem ThebrakesystemlSprOVidedwithabuzzerandawamlnglampaswamingdevices．

① whentheoilpressureintheaccumulatordropsbelowthespeci丘edvalue，thepressureswitchisactuated SOthatthe

brakeoilpressure

wam1nglamPCOmeSOnandthebuzzersounds．

② whentheoillevelinthebrakeoilreservoirdropsbelowthespeci丘edlevel，the

brakeoillevel一▼waming

lamp00meSOn．

げoneofthebrakelinesbreaksfbranyreaSOnOrhasoilleakage，CauSingdi蝕rentialpressurebetweenthe

affbctedlineandtheothernomalline，thepressurediffbrentialswitchofthesplitcylinderisactuatedso thatthe brakeoillevel

wamlnglampcomeson．

Note：Thiscircuitdiagramincludestheparkingbrakecircuit． Fig・4・2 BrakeHydraulicCircuitDiagram

一83−

②：tOnlRⅢNGBRAKEⅥ址〃E andPILOTVALVE

（FRONT）

Note：Spec漬cationsandinstal1ationpositionsofsensorsandswitches Position

Application

Desigれation

Specifi飴tions

A S10p】ampswitch

Stoplamp

bFF：Whenpushedin

B Proximityswilch

Forinchil唱

ON：Whentheo呵ectiscloseenoughtothesensor

Levelswitch（buiItin C

brakeoilreseⅣOir）

D PressuTeSWitch

ーーBrakeoillevel−▼

OFF：Whenlevelisbelowstandardlevel

Warnlnglamp

Operatingpressure（0甲）：55±7k釘Cm之

Brakeoilpressure−

Wamng】ampandbuzzer Resetpressure（ON）：40±5k釘Cmユ

Presstlredifferentialswitch ■ Brakeoillevel− wanl11喝 OFF：Whendi脆柁ntialpressureismorethaれ E

＠ui）tinsplitcylinder）

1amp

15±3k釘mZ

Fig．4．3 ServiceBrakeLine −84−

Operation （1）AccumuIatorAccumulatingPressure

① Theoilpickedup丘omtheoiltank（hydraulicoiltank）bythebrakepumpissentintothe．aqcumul throughthe別terandthecheckvalve．Theoildischargedfromthebrakepumpisalsosuppliedtoboththe parkingbrakelineandthepilotvalve（勾Ofthehydraulicsystem・

② Theoilintheaccumulatorissenttothebrakevalveandblockedbythespool，becausethebrakevalv

notinoperation．

③ whentheoilpressureinthebrakeline（Oilpressureinaccumulator）exceedsthespecifiedpressure，the

reliefvalveisactuatedtoallowtheoildischargedfromthepumpretumtotheoiltankthroughtherelief vdve．

④ whentheoilintheaccumulatorisconsumedbybrakingandtheoilpressuredropsbelowthespeci鮎d

level，thereliefvalveisretumedtotheoriginalstatesothattheoildischarged丘omthepumplSSentinto

tbeaccumulatoragaln．

（FRONTI

Flg．4．4 AccumulatorAccumulatingPressure

一85−

（2）取帽keinOperation

① Asthebrakepedalispressed，thebrakevalvespoolmovesthroughthelinkandthepressurizedoil theaccumulatorishydraulical1ycontrolledbefbredischargedtothesplitcylinder・ ② nesplitcylinderisoperatedbythepressurizedoilfromthebrakevalvetosendthebrakeoiltothe

brakeforbraking．

③ whenthebrakepedalisreleased，thebrakevalvespoolretumstothenon−Operatedpositionandt pressurizedoilactuatingthesplitcylinderflowsthroughthebrakevalvebacktotheoiltank・

④ Thesplitcylinderretumstothenon−OPeratedstateandthebrakeoilactuatingthediskbrakereturnstot SPlitcylinder，thusreleaslngthebrake・

← Whenbrakeisactuated ◆一− Whenbrakeisreleased

（FRONT）

Fig．4．5 BrakeinOperation

ー86−

2．Filter

By−PaSSValveoperatingpressure：

3．5±0．28k釘m2

1．HEAD 2．SEAL 3．HOUSING

4・ELECTRICINDICATOR（notused） 5．BY−相応SVA⊥VE

6．ELEMENT

SectionalviewA−A

椚g．4． Filter

一87−

3．Accumulalor

AIusenitr。g。。（N沖rnllingtheaccumulaton NeYertlSeeXplosiYegaSeSSllCha50Ⅹygen・

Fi山ingpressureofnitrogen（N）：35±1kg／m2

1．ACCUMUI一ÅrOR

2．JOINT 3．BODY 4．CHECKVÅLVE

▼ ＿んJ

5．SPRING

Flg．4．7 Accumulator

一路一

4．1．2 BRAKEVAu／E

nebrakevalve，aCtuatedbyoperatingthebrakepedal，COntrOIsthepressurizedoilfromtheaccumulator

andfbedstheoiltothesplitcylinder．

Note：駐＞ぢ＝コト1．5kg−m

14＝ゝnreadedarea：LOCTITE262

匿＞ぢ＝：コ3−3．5kg−m 医＞ぢ＝コ4−5kg−m l．PUSHROD

8．mNER

15．SPRING

2．DUSTCOVER

9．SPRING

16．SPRING

3．INPUTSPOOL

lO．SPRING

4．STOPPER

ll．SPRINGSEAT

17．PLUNGER 18．REACr10NCHAMBER

5．0ILSEAL 6．COVER

12．BODY

19．AlRBLEEDINGSCREW

13．SPOOL

20．ORIfICE

7．CASE

14．SPRINGSEAT

21．ORIFICE

Fig．4．＄ BrakeV山ve

−89一

4．1．3 SPLJTCYuNDER

Thesplitcylinderisactuatedbythepressurizedoilfromthebrakevalveandfbedsthebrakeoiltothedisk brakeforbraking． Thesplitcylinderhastwosetsofpi＄tOnS（frontandrear）tocomposedoublebrakelines・

㌃

二

1 2 3 4 5 6 7 8 9

Note；匠＞ぢ＝コ 4−5kg−m 匿＝−Pressuredifftrentialswitchworkingpressure OFF：Thepressuredi蝕rencebetweenbrakecylinderportsismorethan15±3kg／cm2（ON：

nomal）

1．BODY 2．PISTON

6．STEELBALL 7．VALVESPRING

11．AlRBLEEDINGSCREW 12．COVER

3．CUP 4．−†0†▼−RING

8．SPRING 9．SPRING

13．PISTON 14．SPRING

5．VALVESEAT

lO．SWITCH Flg．4．9 SplitCylinder

一90一

4．1．4 SLACKADJUSTER

neslackadjusterislocatedbetweenthebrakevalveandthebrakecylinder（diskbrake）tokeepproperthe ClearanCebetweenthebrakedisksandthebrakeplates，Whichincreasesasthefrictionmaterialsgetwom．

Sectional扇ewA−A

Note： 駐＞ぢ＝コ4．5−6．Okg−m 駐＞ぢ＝コ3．5−4．5kg−m 1．BODY

4．SPRING

7．MBODY

2．AIRBREAmER 3．CYLINDER

5．SPRING 6．PISTON

8．CHECKVALVE 9．PLATE

Flg．4・10 SlackAdjuster

ー91−

4．1．5 D】SKBRAKE nediskbrakeisawetmulti−Platedisktypeandlocatedinthefrontandreardriveaxles，reSPeCtively・ Forthecon丘gurationofthediskbrake，referto

3・5DRIVEAXLE・

Operation

① whenthebrakepedalispressed，thebrakeoilpressureactsonthebackofthebrakepiston・Thebr pistonshif【sandlocksupthebrakediskswiththebrakeplates・

TheinsidediameterOfthebrakedisksissplinedtothewheelhub，Whiletheoutsidediameterofthebrake

platesissplinedtothebrakehousing・Locking−uPOfthebrakediskswiththebrakeplatesstop rotating，thusbrakingtheloader・ ② whenthebrakepedalisreleased，thebrakeoilpressureactingthebrakepistonisreleased・Thebrake

pistonisretumedtoitsoriginalpositionbythereturnsprlngSOthataclearanceisprovidedbetweenthe brakedisksandbrakeplates，tOreleasethebrake・

持藻籍封Brakeoil

1．BRAKEPISTON 2．WHEELHUB 3．BRAKEHOUSING 4．BRAKEDISK 5．BRAKEPしゞⅠ℃

6．RETURNSPRING

Fig．4．11DiskBrakeOperation

ー92一

4．2 PARKJNG BRAKEANDEMERGENCYBRAKE 4．2．1BRAKELINE

Theparki71gbrakeisaspringbrakewhichusesamechanicaldrytypediskbrake，andislocatedinthefront di蝕rential．

Theparkingbrakesystemconsistsofthestopvalve（parkingbrakevalve），SPringbrakeandparkingbrake， andisactuatedbyoperatingtheparkingbrakeknobintheoperatorcompartment・

TheparkingbrakesystemisalsousedasanemergenCybrakewhentheservicebrakefailstooperate improper（abnormaloilpressuredrop）・（Safttydevice）

ATheemergencybrakeautotnaticallyoperateswhenthebrakeoilpressuredropsabnormally．1f theloaderisstoppedbytheemergencybrakeoperating，lowerthebucketonthegroundandcheckthe loaden Domotoperatetheloaderbe伽reser▼1ClngiL

Theparkingbrakecannotbereleasedwhenthebrakeoilpressureislow．A氏ertheoilpressureincre morethan45kg／Cm2（thewamingbuzzerstopssounding），preSStheparkingbrakeknobandreleasethebrake・

Note：Specificationsandinstal1ationpositionofswitch Position Designation F

Pressureswitch

Specifications

Application

Transmissioncutoffand Operationpressure（ON）：25±5kさ咋m2 Wamlnglampforparkingbrake Resetpressure（OFF）：Morethan15kgkm2

Fig．4．12 ParkingBrakeLine −93−

Note：Fortheconfigurationofthestopvalve（theparkingbrakevalve），reftrtol Fig・7・12StopⅥ1ve・

Operation （1）Par最ngB帽binRelea5e ① whentheparkingbrakeknobispushedin，the pressurizedoilfromtheaccumulatorflowsthrough theparkingbrakevalve（1）intothespringbrake（2）・

② Thespringofthespringbrake（2）iscompressedto fbrceouttherodtoreleasetheparkingbrake（3）・

Fig．4．13

（2）ParkingBrakeinOperation ① whentheparkingbrakeknobispulledout，the PreSSurizedoilfromtheaccumulatorisblockedoff intheparkingbrakevalve（1）・Thepressurizedoil

COmPreSSingthespringofthespringbrake（2） returnsthroughthevalve（1）totheoiltank・ ② nespringofthespringbrake（2）isrestoredtopull therodtoactuatetheparkingbrake（3）・ （3）EtnergencyBrakeinOperation Whentheoilpressureintheservicebrakeline（the

accumulator）dropsabnormal1yduetoabrokenbrake line，theoilpressurecompressingthesprlngOfthesprlng brakedrops，tOO．Therefore，thesprlnglSreStOredto actuatetheparkingbrake・

椚g．4．14 ー94−

4．2．2 SPR州G BRAKE Astrongspnngisinstal1edinthespringbrake・Thebrakeismechanical1yactuatedbyspringforce．

nespringbrakerodiscomectedtotheparkingbrakeleverthroughtheclevissothattheparkipgbrakeis COntrOlledbychangingthepassagesofpressurizedoilsuppliedtothespringbrake．Thepressureoilissupplied throughtheparkingbrakevalve． Note：Fortheinstallationofthespringbrake，referto

Fig・3・62FrontAxle・．T

駐＞15

▲ Thestr。。gSpringisusedinthisbrakeunit． Therod（7）mustbepuIledoutandsecuredwithajig be伽代loosening仙ecapscrew（15）． ∨始Wl∞kingfromZ

Note： B＞（忘＝コ1−1．8kg−m

紹＝ゝnreadedarea：Sealingcompound

匿＞ぢ：：：コ4−5kg−m

B＞紹＝ゝCircumfbrence：Sealingcom占0undKE45B（RTBrubberbyShinetsu馳gakuKogyo）

1．COVERA】）JUSTER

6．SPRING

11．STOPPER

2．DUSTCOVER

7．ROD

12．PISTONCUP

3．BOOTRETNNER

8．SPRINGSEÅT

13．PISTON

4．CYuNDERASSEMBLY

9．PUSHROD

14．SPRINGBRAKEBODY

5．SPRINGSUPPORT

lO．T▼C▼▼−RING

15．CAPSCREW

Fig．4．15 SpringBrake

ー95−

4．2．3 PARK］NGBRAKE Theparkingbrakeisamechanicaldrytypediskbrake・ ThebrakediskisinstalledonthebrakeflaJlge（rotatingarea）ofthefrontdi蝕rentialandthebrakecaliperis SeCuredtothebrakecarrier（unrotationalarea）onthedi脆rentialcarrier・（Fortheinstal1ation，Seel Fig・3・62 FrontAxle： ）

neslackaquster（Caliperlever）oftheparkingbrakeisconnectedtothespringbrakerod・Whenthecali

leveroftheparkingbrakeisoperatedbythespringbrake，theshaftisrotatedtooperatethepistonsothatthe Parkingbrakeisapplied・

Note：駐＞ぢ＝＝コ19kg−m

1．CALIPER 2．PADASSEMBLY 3．PISTONSEAL 4．PISTON 5．THRUSTBEARING 6．JOURNALBEARING 7．POWERSCREWSHAFT 8．CAP 9．SLACKADJUSTER lO．ADJUSTMENTSCREW

←Z

∨始W100king†romZ

Fig．4．16 ParkingBrake

−96一

ParはngB柑keA咄ustmentProcedllre （1）In5tallingplate ① checkthatthebrakecarrierandtheplateareatrightanglestoeachotherandthattherightanqlef【plates 訂eparallel．

琴三∃Plate蝕ngbolt‥78kg−m ②lnserttheparkingbrakeintotheplateandcheckthatthebrakeslidessmoothly・ （2）Brakedisk

Checktoseethatthedisksurhceisclean．1fitisdir【y，Cleanit． P）SpringbrakerodIength

Screwtheclevisintothecylinderrodofthespringbrakeanda句ustthedistanCebetweenthespringb fittedsurfhceandthecenteroftheclevishole，tO96Tnm．

Note：Whenthecylinderrodhasthemaximumstrokebysupplyingtheoilpressuretothespringbrake，a thedistanCetO144mm． （4）Aqjustingslackaqjuster ①Installtheparkingbrakewiththespringbrake，tOthebrakecarrierplates． ② supplythebrakeoilpressuretothespringbraketoreleasethebrake．Whilethespringbrakeisreleased，

COnneCtthecaliperlevertothespringbrakecleviswithapin．

Fig．4．17 AdjustingParkingBrake

ー97一

③ Tumtheadjustmentscrew（A）oftheslackadjusterclockwise．Crhescrewclickstolockwhenitistumed approx．600．） Tumtheadjustmentscrewuntilitftelshardandbackoffcounterclockwisebyahalftum・

Thetotalclearancebetweenthediskandpadshouldbeapprox・1mm・

（5）PadContact Anewpadmaynotcontactwellwith、thedisk・Applytheemergencybrakingwiththeparkingbrakese

timeswhilerunningthevehicleatlOto20kmAl・ Af（erthat，adjusttheslackadjusterintheprocedure（4）mentionedaboveandadjusttheclearancebet thepadandthedisktoapprox・1mm・

ー98−

5．STEER］NGSYSTEM 1シpe：

Mechanism： Framear（iculatingangle：

Frame articulating Follow−uPlinktype 370torightandleft

SteerlngWheelreductiongear：

Ba山nuttype

Oilpressuresetting：

210k釘m2

Oilflowsetting：

200飢血in

Steerlngpump Model：

KFP5180−80AX

Type： Discharge（loaded）：

lもndemgearpumptype Front：156A血Iin，Rear：156Ahnin 匹ngine：2，000rpm，dischargepressure：210kgkm2）

Weight：

about42・5kg

SteerlngCylinder Type：

Double−aCtingpiston

Q ty：

2

Cyl・innerdia・ⅩrOdouterdia・XStrOke：

120mmx65mmx600mm

Ⅵ屯ight（perpiece）：

about84kg

EmeIgenCySteeringdevice：

Grounddrivenhydraulic（OPtion）

Note：nerearpumpOfthemainpumpisalsousedasasteerlngPumP・Fordetai1s，refbrto一▼7・2PUMPS・一一

5．1GENERALDESCRIPT10N Thesteeringsystemisa丘・amearticulatingtypewhich

steerstheloaderbyoperatingthesteerlngCylinders

between the front and rear frames．The steerlng mechanismisafo1low−uplinktyPeaCtuatingthesteering Valvespoolwiththelinkage・ ThesteerlngSyStemCOnSistsofthesteerlnggear， steerlngValve，SteerlngCylinders，Steerlngpump，and hydraulicplplng・

Fig・5・1Fo1low−uPLinkSteeringSystem

一99−

Note：Theabovesketchdoesnotillustratethepiping Flg．5．2 SteeringSystem

−100一

5．2 01LCJRCULAT10N ROUTES

Theoildrawn丘omtheoiltankbythesteenngpumpISSentunderpressuretothesteenngvalve．Theoil

dischargedfromtherearpumpofthemainpumpunitalsoflowstothesteeringvalve，afterminglingwiththe OilflowfromthesteerlngPumPOnitsway．

1mesteeringvalveregulatesthepressureand凸owrateofthepressurizedoilforsteenngtheloader，While

Sendingexcessoiltothemaincircuit，becausetheloaderhastheprioritysysteminwhichthesteeringoilcircuit takespri0rityoverthemaincircuit・

Whenthesteenngwheelistumed，thesteenngvalvelSPutinactuationtosentthepressurizedoilfromthe pumptothesteenngcylinders，therebysteerlngtheloader・Oilretumingfromthesteenngcylindersflows

throughthesteeringvalvebacktotheoiltank．

STEERlNG CYUND sTEERINGWEEL

BA

toMAINVALVE

sTEERINGVALVE

■■∈」−−

「−一

l ＿．

MAINPUMP 岬UNLOADINGVALVE）

0ルTANK

Fig. 5.3 Hydraulic Circuit Diagram −101一

5．3 STEER［NGWHEEL Thesteenngwheelunitconsistsofthesteenngwheel，SteenngShaft，SteenngCOlumn，andsteerlnggear・ Thesteeringwheelunitisati1tabletypewhichisadjustablein丘vestepswithinafu11160・

Thesteeringgearisabal1nuttype・Thebal1nuttypeisalsocal1edastherecirculatingballtype，Which

ftatureslightsteeringoperation・Thebal1nuttypesteeringgearhassteelbal1sinsertedbetweenthescre

andtheballnut．Therotationofthescrewshaftisconvertedintotheaxialmovementoftheballnutbythe rollingcontactofthesteelbal1s・

Operation

① whenthesteeringwheelistumed，thescrewshaf（Ofthesteeringgearisrotatedthroughthesteeringsha

② Theballnut，inmeshwiththescrewshaft，isalsoinmeshwiththebevelgearofthesector、Shaft

outerrack．Therefbre，Whenthescrewshaftistumed，theballnutmovesintheaxialdirectionwithout rotating．

③ Theaxialmovementofthebal1nutisconvertedintotherotationalmovementofthesectorshaftbym Oftheouterrack．

④ Therotationalmovementofthesectorshaftistransrnittedfromthepitmanamthroughthelinkage SteerlngValve．

ー102一

2

Note：駐＞ぢ＝＝コ3．83kg−m 匿＞仁＝＝袖Slidingpar（：Grease 1．STEERINGW11EEL

7．STEERINGGEAR

13．SPACER

2．（rURNSIGNAl．SWITCH）

8．HORNSWrrCH

14．HEADCOVER

3．（CHANGELEVER）

9．STEERINGCOLUMN

15．STEERINGCOLUMNSUPPORT

4．BEARING 5．COVER 6．STEERINGSHAFT

lO．TImLESTEERING

16．RUBBER

COLUMN STOPPER

17．STEERINGCOLUMNSUPPORT 18．SPRING

ll．LINK 12．PIN

Fig．5．4 SteeringWheelUnit

一103−

SectionalvleWAA

匡＞ぢ＝：コ3，5−5．4kg−m

Note‥ 駐＞ぢ：：：＝＝コ2−3kg−m

駐＞ぢ＝コ20−24kg−m 匠＞印Slidingpart：Grease

1．DUSTCOVE

13．BUSHING 14．ADJUSTINGSCREW

7．SCREWSHAFT 8．BEARING 9．PITMANARM

2．0ILSEAL 3．REARCOVER 4．SHIM

lO．0ILSEAL

5．GEARBOX 6．BALLNUT

ll．BUSHING 12．SECTORSHAFT

15．ADJUSTINGSCREWSHIM 16．SIDECOVER

Flg．5．5 SteeringGear

−104−

5．4 STEERJNGVAu／E

Model：

m400

Type：

ControIvalvewithpressurecompensation

Maximumcontrolflow：

200ゼ／min

Mainreliefpressure： Portreliefpressure：

210k釘m2 230k釘m2

（PortsAandB）

about50kg

Ⅵ屯ight：

PORTREuEFVAい／E

（Spool或rok可

A：CYLINDERPORT B：CYLINDERPORT PUMPPORT

CARRY・OVER PORT ￠omaincircuit）

（Circu托diagram）

T：TんⅣKfORT

椚g．5． Steeringlね1ve

一105−

ThesteerlngValveisacontroIvalvewithapressurecompensationmechanism・Regardlessofload pressure（Steeringcylinderpressure），thisvalvedeliversoiltothesteeringcylindersataflowratecorrespondi tothedisplacementofthesteenngspool・

Withthecarry−OVerPOrt，thesteerlngValvesendsexcessoilnotusedforthesteerlngCircuit，tOthem ClrCult．

ThesteerlngValveconsistspr皿arnyOfthevalvehouslng・SteerlngSPOOl，Carry−OVerplunger，main valve，andpor［reliefvalve・ThemainreliefvalveregulatesthehydraulicoilpressureforthesteerlngCircult， relievlngSOmeOfthepressurizedoiltotheoiltankwhenthehydraulicoilpressureexceedsthepresetvalue・ neportreliefvalve，insta11edoneachsteerlngCylinderport，PrOteCtSthecircuitstothesteenngcylind OVerloading．

2

3

4

SectionalviewXX

1．VALVEHOUSING

6．SPRING

10．STEERINGSPOOL

2．MAINRELIEFVAm

7．CAPSCREW

3．SPRING

8．SPRING

ll．PLUG 12．SEAL

4．CARRY−OVERPLUNGER

9．POPPET

13．WIPER

5．CAP

（LOADCHECKVAm）

14・SLEEVE

Flg．5．7SectionalViewofSteeringV山ve（RefertoFig・5・6）

一106−

5．5 CONTROLuNKAGE ThesteerlngCOntrOllinkageisconnectedfromthepitmanamfittedtothesteerlnggearSeCtOrShaft， throughtherodandlinkage，tOthesteeringvalvespool・

Thecontrollinkageissupportedonthepivot，Whichisinstal1edonthe丘ontframe・ThesteerlngValYeis mountedontherearframe，andthesteerlnggearOnthe凸00rboardofthecockpit，bothmovlngaSdoestherear 丘ame．

necontrollinkagenotonlyactuatesthesteerlngValveaccordingtothemovementofthesteerlngWheel， butfeedsthearticulationoftheframebacktothesteerlngValvewhentheloaderistumed．

胃

田 ／ 7 に：：：：：＝≡≡コ㌃−−−−−−8

∨始W100kingfromA

rl■●￣

■■、￣−￣￣￣￣●￣￣￣￣￣

−−−こニニニ＝二二丁十j

N。te：駐＞紹＝ゝThreadedarea：LOCrlTE

1．STEERINGVALVE

6．BRACKET

2．STEERINGGEAR

7．BEARING

StOPpertOO−5mmatframeside

3．STOPPER

8．LINK

4．ROD

9．PIVOT

（Careshouldbeexercisednottohit

5．PIN

匿＞Adjusttheclearanceofarticulating

StrOnglyagainstframe−Sidear（iculat− hgstoppers．） Fig．5．8 ControILinkage

−107−

5．6 STEER）NG PUMP Thesteenngpumpusestandemgearpumps・Theoilfromthefrontpumpandtheoilfromtherear

minglewitheachotherintooneflowinsidethecenterplateandisdischargedthroughoneport・Thisdischarg portisprovidedwithacheckvalvetopreventthebackflowofoilinanemergency・

ThesteerlngPumPislocatedontheconverterhousinganddrivenbythepumpdriveofthetorqueconverter・ Forthisreason，thesteerlngPumPrOtateSaStheenglneStartSrunnlng，Pickingupoilfromtheoiltanktose to the steering valve.

Note：ForthelayoutfbrthesteerlngPumP，refbrtoFig・7・4

Suction side

Discharge side

Flg．5．9 SteeringPump

一108−

7 6

8 4 16

5

4 3 2

11

12 13

1

17

10

9

SectionalviewBB

Sectiona】病母wAA

Note：駐＞Insertintofront−Sidegearplate（2）alone．

1．MOUNTINGFLANGE

8．COVER

15．0ILSEAL

2．GEARPLATE 3．DRIVENGEAR

9．▼▼OM−RING

lO．R￡A月DRIVEGEAR

16．CONNECTORCOVER 17．CONNECrORCOVER

4．PRESSUREPLÅrE

ll．SPuNECOUPLING

18．PLÅⅠちSEAL

5．CENTERPLATE

12．DOWEL

19．BACK−UP

6．DRIVENGEAR 7．GEARPLATE

13．FRONTDRIVEGEAR 14．SPECIALWASHER

20．ISOLATIONPLATE 21．SmBILIZER

Fig．5．10 SectionalViewsofSteeringPump

一109一

14 15

5．7STEER］NGCYLJNDER

TⅣOSteeringcylindersofdoubleactingtypearemountedonthisloader．Theircylindertubesaremounted Ontherearframeandthepistonrodsonthefront仕ame，reSPeCtively・

WhenonesteerlngCylinderisextendedbypressurizedoilfromthesteerlngValve，theothersteerlngCylinder iscontracted，SOthattheloadertumstothesideatwhichthecylindercontracts・

旺＞2 3 4 5 6 7

1012111213＜司

8 9

14く司

15 トーーーーーーーーーーーーーー ＼／〝＼／ ！ l ＼ 糎

u

Debi10＝nside

…二二￣＝＝二二三：≡ Note：B＞ぢ＝コ108kg−m

14⊃ゝThreadedarea：THREEBOND1901

駐＝＞ぢ：：＝コ300kg−m

B＞ぢ＝コ5・8kg−m（aftertightening，Stake2pointswithapunch・） 1．WIPERRING

6．BACK−UPRING

11．SEALRINGASSEMBLY

2．CYLINDERHEAD

7．▼▼0−▼−RING

12．SLIDERING

3．−▼0▼▼−RING

8．PISTONROD

13．N℃TANDSHIM

4．BUSHING

9．CYLINDERTUBE lO．PISTON

14．SETSCREW 15．STEELBALL

5．▼▼U−▼一RING

Flg．5．11SteeringCylinder ー110−

5．8EMERGENCYSTEER］NGUNIT（OPT［ON）

L

5．8．10］LCIRCULAnON ROUTES

STEERINGCYuNDER

sT∈∈RING

WHEEL

，

PB

PI

toMA］NVALVE

STEERINGVALVE

■■l−−

MAJNPUMP EMERGENCY PUMP

0ルTANK

Note：B＞Pressureswitch（forEMERGENCYSTEER］NGwaminglamP）tumsonatatmospheric preSSure・

Fig．5・12 HydraulicCircuitDiagram

−111−

5．8．2 EMERGENCYPUMP

Theemergencypumpservesasahydraulicpowersourceforthesteerlngunitandisdrivenbytherotational

powerofthetires・ThispunPuSeSagearPumpWhichrotatesintwodirectionsaccordingto・th9traV directionoftheloader．

neemergencypumpisBttedtothetransmissionandisdrivenbypowerfromthetirestopickupoilfrom theoiltanktosendittothedivertervalve．

Note：Forthe蝕tingseatfortheemergencypump，refbrtoFig・3・8・

Rotatesintwodirectjons． ．ナーt

Fig．5．13 EmergencyPump

−112−

5．8．3 DIVERTERVALVE

nedivertervalveworkswiththeemergencypumptocontroltheselectionofthepump

ssuctionporta

dischargeportaswe11astheunloadingoperationofthepump・

TheoildischargedffomtheemergencypumplSuSual1yretumedfromthedivertervalvetotheoiltank

（emergencypumpinunloadedcondition）・ IfthesteerlngPumpStOPSOperatingfbranyreaSOn，SuChaswhentheenglneStalls，thediverterpi

pressure（P）dropstozeroandtheoildischarged丘omemergencypumpnowsthroughthedivertervalve steerlngValve，thusmakingitpossibletosteertheloader・

RELIEFVALVE

PM PM

Reliefvalvepressuresetting： 175k釘qn2

Fig．5．14 Diver（erV山ve

ー113−

6．FRAMEANDCOCKP］T 6．1FRAME Theframeisasteel−Plateweldedtypeanddividedintotwoparts：frontandrearframeS・Thecockpitand OperatOr，sseataremountedontherearframe・

▲ Donottrytomo嘩theROPS（Roll−OVerprOteCtionstructure），ifmounted，witチOutp

permission＆omthemanufhcturer・IftheROPSshouldgetdamagedordebrmedduetoturu1ngOV collision，itisadvisabletoreplaceitwithanewoneIbecauseadamagedordebrmedROPShasalow 5truCturalstrength．

Note：ぢ＝コ，Steelcabmountingbolt：17・1kg−m ぢ：＝コBalanceweightmountingbolt：154kg−m 椚g． ．1Frame

−114−

neloaderisaframe−articulatedtype：thefrontframeisjoinedtotherearframeWithtwohingepins，arOun

Whichtheloaderpivotsfbrsteenng．

▲ whentheloaderissteered，theareanearthecenterhingepinsbecomessonarrOWthaty。umi

getcaughtbetweentheh．ontandrear駄●ameS．Bebretryingtoservicetheloader；makesuretosetth

Sa鎚tylink．Priortomoving（traveling）theloader；makesurethesa鮎tylinkisreplacedtotherear什ame． （Upperhingepimsection）

Note： 旺＞14＝ゝOuterri喝： Ⅰ一OCTITE

匿＞〆＝＝袖Imersu血ce： Grease 駐＞ぢ＝：コ22・8kg−m

1．UPPERHINGEPIN 2．CAP 3．SHIM，t＝0．4mm

4．BEARING 5．CAP 6．DUSTSEAL 7．BUSHING

（hwer血ingepinsection） Note： 駐＞紹＝ゝOuterring： ■￣■

LOCTITE

匡モ笹⇒22・8kg−m 駐＞ぢ＝コ154kg−m 1．LOWERHINGEPIN 2．−−0−−−RING

3．BUSHING 4．CAP 5．SHIM，t＝0．4mm

6．BEARING 7．CAア

8．DUSTSEAL 9．BUSHING lO．SHIM，t＝0．4mm

ll．WASIiER

Fig．6．2 CenterHingePin

ー115−

6．2 COCK門T necockpitismountedontherearframeby4−POintrubbermountfloatingmethodwhichreducesvibration andnoisewhichwillbetransmittedtotheoperatorinthecockpit・

Note：匠＝−ぢ＝コ22・8kg−m

1．COCKPIT

4．UPPERSEÅTBASE

2．RUBBERMOUNT

5．UNDERSEÅTBASE

3．SEÅr

Fig．6．3 DisassembledViewofCockpit

−116−

7．HYDRAUuCSYSTEM Thehydraulicsystemusesthemainpumpasitspowersourceanddirectstheflowsofoilwiththemain ValveaccordingtotheworkyouwanttOdo． Thehydraulicsystemofthisloaderisapilotoperationcontroltypewhichconsistsofacombinationofa pilotvalveandamainvalve，tOlessentheforceneededtooperatethevalvecontroIs・ nehydraulicsystemconsistsprlmari1yofpumps，Valves，ValvecontroIs，OiltankandhydraulicpIPlng・

Flg・7・1HydraulicSystem −117−

7．10］LCIRCUUIT10N ROUTES

Thehydrauliccircuitoftheloaderconsistsofthemainhydrauliccircuit，Pilothydrauliccircuit，andsteerlng hydrauliccircuit・Forthesteeringhydrauliccircuit，referto1．5・STEERINGSYSTEM・一▼

1．MainHydralllicCircuit

nemainpumppicksupoilfromtheoiltankanddirectsitunderpressureintothemainⅤalve・Exces

pressurizedoilnotusedfbrthesteerlngCircuitisreturnedfromthesteerlngValvetothemainvalve・Whent

mainvalveisinneutral，thepressurizedoilflowsthroughthevalve，backintotheoiltank・Whent valveisplacedinanOperatingposition，thepressurizedoilissenttoeithertheboomcylindersorthebucket

cylindertooperateit・Theoilforcedoutofthecylinderretumsintothemainvalveandthen加wsint tank．

Unloadingsystem

Themainpump（frontpump）usesanunloading SyStem．WhenthemaincircuitneedsalargeamOuntOf low−PreSSureOil，theoildischargedfromthemainpump

andthesteerlngpumplSuSed．1fthemaincircuit requlreSaSmallamountofhigh−PreSSureOil，themain pump（frontpump）stopsdischargingoil，puttingthe

mainpumpinunloadingoperation・

Fig．7．2 UnloadingSystem

2．PilotHydraulicCircuit Inthepilothydrauliccircuit，thepressurizedoilfromtheaccumulatorofthebrakeoilcircuitflowsthrough

thestopvalveintothepilotvalve・WhenthepilotvalveisplacedinanOPeratingpositionwiththel

handlinglever，thepressurizedoilissenttothemainvalvepilotporttoshiftthemainvalvespool・Theoil dischargedfromtheoppositeendofthevalvespoolflowsthroughthepilotvalve，backintotheoiltank・ 3．OilCoolerCircuit

ThehydraulicoilpickedupbythePOC＆brakepump丘omtheoiltankissentfromthefrontpumptothe oilcoolerwhereitiscooled，beforereturnlnglntOtheoiltank・Theoilcoolerisintegralwiththeradiator・

Theoilswhichretumedfromthemainhydrauliccircuitandtheoilcoolercircuitminglewitheachotherinto OTleflow，Whichflowsthroughtheretum丘1terandbackintotheoiltank・

一118−

−−−−−−…−−−…−−−−−…−−−−−−−…−−−M− −…−……−−

＿

ACCUMUL＾TOR

EMERGENCYSTEER（NG一 （OPT旧NI

PARKINGBRAKE

Ⅵ軋〟E

Fig. 7.3 Hydraulic Circuit Diagram

ー119一

7．2 PUMPS Mainpump Model：

KFP5180−80AY・SP

坤pe：

Thdemgearpumpswithunloadingvalve 156Ah71inforfrontpumpand156Bhninfbrrearpump

Discharge（loaded）：

（engine：2，000rpm，dischargepressure：175kgkm2）

about60．6kg

Ⅵねight：

POC＆brakepump Model：

KFP2233−14ADCS

1ype：

nndemgearpumps

Discharge（loaded）：

68Ahninforfrontpump，29A／minfbrrearpump （engine：2，000rpm，frontpumpdischargepressure： 5kgkm2，rearPumpdischargepressure：65kg／cm2）

Thisloaderusesfourpumps：themainpump，SteerlngPump，POC＆brakepumpandchargingpump．

areinstal1edontheconverterhousingandaredrivenbythepumpdriveofthetoqueconverter・Therefore，t

rotateastheenglnerunS．

Note：ForthespecificationsandtheconstruCtionofthesteerlngPumP，reftrto▼▼5・STEERINGSYSTEM：

Forthechargingpump，refbrto

3．1TORQUECONVERTER．一一

Fig・7・4 SchematicI・ayOutOfPumpsonConverterHousing

ー120−

7．2．1MA川PUMP

Themainpumpusesthefrontpumpofthetandemgearpumps，withtherearpumpusedasthesteerlng pump・TheoildischargedfromtherearpumpISSenttOthesteerlngValve・

Themainpumpdrawshydraulicoilfromtheoiltankandsendsitunderpressuretothemainvalve・When theoilpressureinthemainhydrauliccircuit（pumpdischargeside）exceedsthespecified、preSSure，the unloadingvalve（SHvalve）ofthemainpumpoperatestoretumtheoildischargedfromthemainpumptot suctionside，thusunloadingthemainpumptomakebetteruseoftheenglnepOWer・

Suction side 、−・→

（Rotationaldirection）

Unloadingpressure：175kg／Cm2

Fig．7．5 MainPump

ー121−

16

8

6 5

4 3

2 1

1413

12 11

10 9

7

15

18

SectionalviewBB

（2）

Sectional扇ewAA

Note：B＞Instal1isolationplatewithchamfbredpartfhcingtowardthebottomofhole・ 巨＞Insert8stabilizersoTlfrontpumpatgearplatesidealone．

1．MOUNTINGFLANGE 2．PLATESEAL

8．COVER 9．0ILSEAL

15．REARDRIVEGEAR 16．CONNECTORCOVER

3．DRIVENGEAR

lO．SPECIALWASHER

17．−−OM−RING

4．GEARPL〟rE

ll．FRONTDRIVEGEAR

18．BACK−UI〉

5．PRESSUREPLATE

12．DOWEL

19．ISOLATIONPLATE

6．CENTERPLATE

13．▼▼0−▼−RING

20．STABILIZER

7．DRIVENGEAR

14．SPLINECOUPLING

21．SHVA⊥VE

Fig・7・6SectionalViewsofMainPump ー122−

7．2．2 POC＆BRAKEPUMP

ThePOC＆brakepumpassemblyconsistsoftandemgearpumps，withthe丘ontpumPuSedtocoolt hydraulicoilandtherearpumpusedasthePOC（pilotoperationcontrol）＆brakepump・

ThefrontpumpPicksuphydraulicoilfromtheoiltankandsendsitintotheoilcooler，fromwhichtheoilis

retumedintotheontank．ThePOC＆brakepumpdelivershydraulicoiltotheaccumulatorfbroperation brakesystemandpilotvalve（loadhandlingvalvecontroIs）・

16 17 （16）（17）

Soctiona川ewCC

SectionalviewBB

Sectional view AA

1．MOUNTINGFLANGE

7．PRESSUREPLATE

13．CONNECTORCOVER

2．PRESSUREPLATE

8．DRIVENGEAR

14．，▼0▼▼−RING

3．DRIVENGEAR

9．GEARPLATE

15．REARDRIVEGEAR

4．GEARPuゞrE

lO．COVER

16．PLゞrESEAL

5．CENTERPLATE

ll．0ILSEAL

17．BACK−UP

6．SPLINECOUPLING

12．FRONTDRIVEGEAR

18．SmBILIZER

Fig．7．7 POC＆BrakePump

−123−

7．3VAu／E

Mainvalve Model：

KVSL−500−2

取pe：

2−SPOOIslidingtype，Pilotoperationcontro1

Mainreliefpressuresetting： Portreliefpressuresetting

210k釘m2

Por【Al：

175k釘m2

PodBl：

235k釘00lZ

Por【Bz：

おOk釘CmZ

Ⅵねight：

about 93 kg

Pilot valve Model：

MPPC−MD

取pe：

2−SpOOIslidingtype

7．3．1MAINVAu／E

Themainvalveisastacked，2−SPOOIslidingtypeconSistingofthein1etsection，tWOSPOOIsections， SeCtion，andoutletsection．

Thevalvehasatandemoilpassagecircuitinwhichthebucketlinetakespriorityovertheboomcircuit，SO

thatonlywhenthebucketspooIsectionisneutral，thepressurizedoilisdeliveredtotheboomcircuit・The

bucketpriorltyCircuitallowstheoperatortooperateboththebucketandtheboomssimplybymanipulatingthe bucketleveralone，WiththeboomleverinRAISEorDOWN．

nemainⅤalveselectivelysendsthepressurizedoilfromthemainpumptothebucketcylinderorto

boomcylinders・Theoilpassagesinthemainvalveareselectedbypilotoperationcontroluslngtheoilpress fromthepilotvalve・Fordetai1s，reftrto 7・4VA⊥VモCONTROLS：†

ー124−

3

2

Note： 紅＞ぢ＝コ詔kg−m 駐＞ぢ＝コ65kg−m

1．1NLETSECT10N 2．SPOOLSECTION（BUCKET） 3．SPOOLSECT10N（BOOMS）

4．OUTLETSECT10N 5．SPACERSECT10N 6．MAlNRELIEFVALVE 7．PORTRELIEFVALVE

P Tl （Circu稚dia9ram）

8．ANTl−VOIDVALVE

椚g．7．＄ MainV山ve

ー125−

SpooISection （訊此ket）

（ち00m）

1．VALⅥEHOUSING

2．SPOOL 3．SPOOLEND

7．SOCKETHEADBOIJ

4．CAP 5．SPRING 6．SPRINGSEAT

8．−−0▼▼−RING

9．SPRING

Spacer Section

1．SPACER 2

2．POPPET（LOADCHECK

3 4

WE） 3．SPRING 4．PLUG

5

5．■▼0▼▼一RING

Flg・7・9 SectionalViewsofMainVAIve

ー126−

7．3．2 PILOTVALVE

nepilotvalveisastacked2−SPOOltypeconsistingoftwovalvebodyassembliesconstruCtedbytwotierod bolts．

Whentheloadhandlinglever（boomorbucketlever）isoperated，theplungerinthepilotvalveishiftedto

Switchovertheoilpassagesfbrthepressurizedoilandsendtheoiltothepilotportofthemainvalve，thus CauSlngthespooltoactuate・

払chpilotplungerisprovidedwithasolenoiddetentmechanism・Whentheboomplungerisshif（edt l▼raise一一orT−float▼▼positionorwhenthebucketplungerisshiftedtothe一▼rolトback†▼position，theplunger

automaticallyisheldinthatpositionduetothesolenoiddetentmechanism，SOthattheloadhandlinglever

WOn

treturntOneutralifthehandisremovedfromthelever．Iftheleverisinotherpositions，itwulretumto

neutralwhenthehandisremovedfromit．

（Code）

1：Po丘Bl−Sidecoil （bomsraise） 2：PorlB2−SidecoiI （budくetrOlトback）

3：Po「【Al−Sidocoil （boolれSdown）

ー（B00m）

（8ucket）

（B00m）

椚g．7．10 PilotⅥ1ve

ー127−

7．4VALNECONTROLS

ThevalvecontroIsystemadoptsapilotoperationcontrolmethod・Thelargertheloaderbecomes，thelar thehydraulicequlpmentisneeded・SincethevolumeofoilpasslngthroughthecontroIvalvebecomesasgrea asa飴whundredlitersperminute，1argespooIsarerequiredtoswitchoveroilpassages，andaccordinglya 伽rceisneededtooperateSuChlargespooIs・

rIbreducethefbrceneededtooperatethecontroIvalve，thisloaderusesthepilotoperationcontrolmet

lnthismethod，thepilotvalveiscombinedwiththemainvalvewhosespooIsareoperatedbytheoilpressure fromthepilotvalve，tOSwitchovertheoilpassagesinthemainvalve・

A′AsasabtydevicebrthevalvecontroIsystem，aStOpValveisprovide？・ThesT・pValvem pulIedoutwhentheloadhandlingworkisnotperbrmed・ThiskeepsthemalnValvelnneutralev theloadhandlingleverisunintentiona11yshiftedIthuspreventingtheloadingmeansfrommovlng accidentally．

A 弓Cauti。nStObetakenwhenrepairingpilothydraulicline Thepilotvalveisoperatedbyoilpressureaccumulatedintheacclltnulaton Whentryingtoservice

thepipingIShutofftheet）glneandpumpthebrakepeda120to40time5伽r・Ciblytorelievethepres fromtheaccumula10nIfthepipingisremovedwithout茄rstrelievingthepressure，ajetofhigh−preSSllr Oilwi11spllrtOutandmightcauseseriouspersonaliqjury・

7．4．1SYSTEMOPERÅT］ON

nespooIsectionsofthemainvalvehavepilotports（Pal，Pa2，Pbl，Pb2）attheirbothends，reSPeCti Thesepilotportsarecommunicatedwiththeirrespectivepilotvalvedischargeports（B2，Bl，A2，Al）・ Whentheloadhandlingleverisshif【ed，theoilpassagesinthepilotvalvearechanged，PreSSurizedoi throughtheselecteddischargeporttothepilotportofthemainvalve，thusmovingthespool・Theoilforce outoftheoppositepilotportduetotheshif（ingofthespool，flowstothepilotvalveandretumsbackintot Oiltank．

Note：WiththeenglneShutoff；itispossibletolowertheboomsbyoperatingtheboomcontrolleverifthere Oilpressureaccumulatedintheaccumulator・

Hydraulic control method nepilotoperationcontrolishydraulical1ycontrolled・

neoilpressureatthedischargeportofthepilotvalveincreasesinproportiontotheoperatingangleofthe loadhandlinglever．Thehigherthepilotvalveoilpressure，thegreaterthemainvalvespooIshifts・Therefore，

thespeedoftheloadhandlingmeansincreasesordecreasesproportionatelywiththeoperatingangleoftheload handlinglever．

ー128−

Note：B＞TherestrictionvalveisafunctionalpartoftheGSS．Fordetai1s，refertol▼8．1．3BUCK LEVELER，BOOMKICKOUTANDGSS．一

Fig．7．11HydraulicCircuitDiagramforV山veControIs Exampleofoperation：Boomleverin

MSE．

① whentheboomleverisplacedintheRAISEposition，theportsAlandBlofthepilotvalveare

COmmunicatedtoportsPandT ② TheprssurizedoilfromtheaccumulatornowsthroughthestopvalvetotheportPofthepilotvalve．

③ ThepressurizedoilflowsfromtheportPofthepilotvalve，paStPOrtAl，tOtheportPb20fthemainv

toshif【thespool．Thepressurizedoilisthendischargedthroughpor【B2toextendtheboomcylinders，

tbusralSlngthebooms． ④ Asthemainvalvespoolisshifted，theoildischargedthroughportPa2flowstotheportBlofthepilo Valve，PaStPOrtTbackintotheoiltank．

−129−

7．4．2 STOPVAu／E

nestopvalvecontroIsthedeliveryofpressurizedoiltothepilotvalve・

Whenthestopvalveknobispul1edout，theoilpassageleadingtothepilotvalveisblockeduptopreventthe

pressurizedoilfromflowingtothepilotvalve，OrPreVentingtheloadhandlingmeanSfromworking・Pushin inthestopvalveknobwillopentheoilpassagetoallowthepressurizedoiltoflowtothepilotvalve・ valvelSPrOvidedwiththedetentmechanismwhichholdsthespoolinposition・

〒〒≒ 口

口 」＿＿

＿＿」

1

1

1．SPOOL 2．WHOUSING 3．SEALPLÅTE

4．COLLAR 5．I▼0▼−−RING

6．CAP 7．PIN 8．DETENTSPRING 9．SLEEVE lO．DETENTBALL ll．WIPER 12．SEAL

Fig．7．12 Stoplゐ1ve

ー130−

8．LOADHANDuNGSYSTEM unkage： Bucket：

Z shape Type4withspaceedges

Bucketcapac吋

Heaped： Struck： Bucketleveler： Boomkickout： GSS：

6．Om3 5．1m3 Provided（non−COntaCttype） Provided（non−COntaCttype） Provided（non−COntaCttype）

Ⅵ屯ight

Boom： Bellcrank： Pushrod： Bucket：

2，960kg 955 kg 175 kg 4，930kg

Fig・8・1LoadHandlingSystem −131−

8．1BOOM，BELLCRANK，ANDBUCKET 8．1．1GENERALDESCRJPTION

Theloadhandlingsystemisoperatedbyhydrauliccylinderstoperformdigging，SCOOping，andtranspor loads．

nelinkageisaZ−Shapedtypewhichissimpleindesignanddeliversgreaterbucketraisingforcethanother multiplelinkagetypes・

Theloadhandlingsystemconsistsofbooms，bellcrank，puShrod・bucket，bucketcylinder，boomcyli andpinstomountthesecomponents・

Forefncientloadhandlingoperation，theloaderisequlpPedwiththebucketleveler，boomkickout，an

mechanism・Al1theconnectingpinsoftheloadingsystemareanoil一別1edfloatingtypewhichftaturesalo

lubricationintervalforimprovedserviceability．

8

7

6

1 2 3 4 5

1．PIN 2．RING 3．BUSHING 4．OILSEAL 5．FLANGE

6．BUSHING 7．SHIM 8．CAP 9．CAP

Notes：1・Bushingsmustbecoldfitusingdry iceat−60to−700cforaboutlhour． 2．Oilsealmustnotbedisassembled．

3．Af（erassembling，addpinoil・

4．Applygreaseoncapandbushing inner surface before installing them.

6＝：コCapfittingbolt：22・8kg−m

Fig．8．2 FloatingPin

Note：Cautionstobetakenwhenassemblingboom l． Bleedairoutoftheboomcylinders．

Afterinstal1ingeachboomcylinder，Putitupright（before伽ingaboom）andapplypressureonthero

sideandthetai1sidealtematelymorethan且vetimestobleedairoutofthecylinder・Theengmeshould beatlowidle．

2． Bucketstopperalignment

Adjustthebucketstoppersothatthebucketraisinganglebe500whentheloaderisinthetraveling

posture（hingepinheightat610mm）・ Extendthebucketcylindertoitsstrokeendandcontractitabout5mmbeforegaugeweldingthestopper・

ー132−

「￣「￣￣「、丁′1

SectionalviewAA

Sectiona（ViewCC

SectjonalviewB8

L、1」

L＿し＿l

Sectiona［viewDD

1．BUCKET

4．BUCKETCYLINDER

7．FRONTFRAME

2．PUSHROD

5．BOOM

8．BUCKETSTOPPER

3．BELLCRANK

6．BOOMCYLINDER Fig．＄．3 Boom，Bucket，andPushRod

ー133−

8．1．2 BUCKET

Type4bucketwithspaceedgesisstandard．Inadditiontothestandardtype，type3rockbucket，double−

edgedbucket，androckbucket（withspaceedges）arealsooptional1yavanable・Thebucketshouldbeselec

withduecare，COnSideringtheconditionofjobsites，thenatureofloadstobehandled，andtheop COndition．

Note： 紅＞ぢ：：：コ109kg−m

駐＝＞往＝コ300kg−m

1．SIDEEDGE 2．SPACEEDGE 3．BUCKETTOOTH 4．CUTTINGEDGE 5．SPACEEDGE 6．SPACEEDGE

4

5

7．Ⅵ唱ARPLATE

Fig．8．4 Type4Bucket（withspaceedges）

−134−

8．1．3BUCKETLEVELER，BOOMKICKOUllANDGSS l．BucketLe▼eler

WiththebucketcontrolleverputintheRoll−backpositionafterdumplngthebucket，thebucketleveler automatical1yretumsthecontrollevertoneutralwhenthebucketisputinthehorizontalposition，thusholding thebuckethorizontal． Operation（RefbrtoFigs・8・5and8・6・）

① whenthebucketistiltedforwardfromthehorizontalposition，thesensingsu血ceofthebucketleveler

proximityswitchissoclosetothelevelerthattheswitchisinON・Whenthebucketcontrolleveris

Shiftedintotheroll−backposition，theleverisheldatthatpositionbyoperationofthebucketleveler

SOlenoidofthepilotvalve．

② Asthebucketisrolledback，thebucketcylinderpistonextends．Whenthebucketbecomeslevel，

levelerbarleavestheproximityswitchsensingsurfhcetotumtheswitchOFF．

③ ThepilotvalveTsbucketlevelersolenoidisthusde−energizedsothatthebucketcontrolleverdisengages

itself丘omthedetenttoreturTltOneutral．Thebucketstopstiltingandstandsatthehorizontalposition． Note：Whenthebucketisro11edbackbeyondthehorizontalline，thebucketlevelerproximityswitchisOFFso thatthebucketleverroll−backdetentwon，twork．

（FRONTFRAME） ︵習 −−

BUCKETCYUNDER

1．LEVELERBAR 2．PROXIMITYSWITCH（fOR u三VELER）

3．WIREHARNESS 4．BRACKET

Flg．8．5 BucketLeveler

ー135−

（Hydrauliccircuitdiagram）

（別ectriccircuitdiagram）

Fig・＄・6HydraulicandElectricCircuitDiagramSforLevelerandGSS

−136−

乙 BoomXiekout

neboomkickoutstopsthebucketatapresetheight．Whentheboomsareraisedtoapresetheightwiththe boomcontrolleverin liftingofthebooms．

Raise，l theboomcontrolleverautomatical1yreturnstoneutral，thereby．stopplngthe

Ope帽tion（Re飴rtoFigs．8．7and8．6．） ① Aslongastheboomsarelowerthanapresetboomkickoutheight，thesensingsurfaceofthebo

kickoutproximityswitchissoclosetothelevelplatethattheswitchiskeptinON・Whentheboom controlleverisplacedintheraiseposition，itisheldatthatpositionbyoperationoftheboomkickout

SOlenoidofthepilotvalve・ ② Astheboomsareraisedtotheboomkickoutpresetheight，thelevelplateleavestheproximityswit

SenSlngSurfhcetotumtheswitchOFF． ③ Thepilotvalve▼sboomkickoutsolemidisde−energizedtodisengagetheboomleverfromthedetenttolet itretumtoneutral．Theboomsstopliftingandareheldatthepresetposition． Note：W血iletheboomsarehigherthantheboomkickoutheight，theboomkickoutproximityswitchisOFF，SO thattheboomcontrollever raisel positiondetentwon twork．

1．LEVELPLゞ托（FORGSS） 2．LEVELPしITE（FOR ⅢCKOUT）

（FORKICKOUT）

−

′

﹁ゝ ︶

（B∞M

3．BRACKET 4．PROXIMITYSWITCH （FORGSS） 5．PROXIMITYSWITCH

﹂

−

′〃〃′／／ し ∴∴Å

・／／ノ ／ ／

／

／／ ／／

／

／

十−」FRONTFRAME） l

レ

／／／／・′

し

／／

／／ ／／

′／／／ ／ノ

Note：neSwitchcouplershouldbe instal1edhorizontallytopreventthe

entryofwaterintothemechanism．

椚g．8．7BoomKickoutandGSS

ー137−

3．GSS（GrotlndStopSystem）

neGSSsystemautomatical1ystopstheboomsatapresetheight・Whentheboomsareloweredtoapres heightwiththeboomcontrolleverinthe

TfloatTTposition，theboomsautomatical1ystoplowering叩申thelever

retumstoneutral．ThelTsof【stopI−functional1eviatesshockcausedatthetimeoftheboomsstopplng・ Operation（RefertoFigs・8・7and8・6・）

① Aslongastheboomsarehigherthanapresetheight，thesensingsurfaceoftheGSSproximityswit closetothelevelplatethattheswitchiskeptinON・Whentheboomcontrolleverisplacedinthef

position，itisheldatthatpositionbyoperationofthepilotvalve幻oatdownSOlenoid・ ② Astheboomsareloweredtdthepresetheight，theproxlmityswitchsensingsurfhceleavesthelevelplate toturntheswitchOFF．

③ nepilotvalvefloatdownSOlenoidisde−energizedtodisengagetheboomcontrolleverfromthedetentto

letitretumtoneutral．Theboomsstoplowenngandareheldatthepresetposition・Atthistime， pressurizedoilatthepilotportPa20fthemainvalvepassesthroughtheorifice（1・6mmdia・）ofthe

restrictionvalvetobedrained，thusdecreaslngthepilotoilpressuregradually，SOthattheboomspo SlowlyreturnStOneutraltobringtheboomstoastopslowly（ softT stopfunction）・

MAINVALVどS Pa2pon

≠1．6皿

A ＿瑳LB

椚g．8．＄ RestrictionV山ve

ー138−

8．2 CYL］NDERS

Boom cylinder lシpe：

Double−aCtingpIStOn

Q け：

2

Cylinderinnerdia・ⅩrOdouterdia・ⅩStrOke：

230mmx130mmxl，110Ⅱ皿

Weightberpiece）：

532kg

Bucketcylinder ′吋pe：

Double−aCtingpIStOn

Q り■：

1

CylindeThnerdia．xrodouteTdia・ⅩStTOke：

Weight：

290mmx160mmx710mm 620 kg

8．2．1BOOM CYLINDER

netwoboomcylindersareadouble−aCtingpistontype・Theboomcylindersareextendedorretracted

rockingaroundtheconnectingplnatthecylindertailtoraiseorlowerthebooms，reSPeCtively・Theb Cylinderconsistsofacylindertube，Cylindercap，PIStOnrOd，Pistonandpackings・ 8．2．2 BUCKETCYuNDER

Thebucketcylinderisadouble−aCtingpistontype・AsthebucketcylinderisextendedorretTaCted，the

bucketisdumpedorrouedbackthroughthebellcTankandpushrodmechanism・Thebucketcylinderconsis Ofacylindertube，Cylindercap，pistonrod，Pistonandpackings・

ー139−

≧一日銘UShO ト S ． ∞ l

ロNl出U一己NO↑ S ︻ h ． ト l ON1年銘く 凹 ≧ r や l

寸l

ロZI銀山白− J S Ⅳ に ZOト S ︻ 一

Cl 口OdZO↑ S I h

〇l

11

国内⊃ト出国凸ZI J ト U N l

・−− ○ − ■

hくU．か じNl銘・−−○−−．∽

DNl出hn・出じく再．ト ロZI銘・−−○；．り

OZ︻出じ式日○銘．れ ロZl銘hn・出じく臼．寸

ロZl苫Sn西n白．M h−JU出lU．N

Jく山SトSn口．1

03−ロ⁚訂阜−乱︼呂阜g

せ∧幽

N≡20Ⅷ望苧苫−羞パリY∧虫

︵．∽1月︒dNづ竺眉︒羞晋1

等N賀50J⁚彗p登戸パ甘 宇叫芦や﹇

ぜ人鉦

び∧嵐

呈ぎ喜冬﹇＝ぜ∧邑⁝琶Z

宇茸01﹇＝ぜ∧幽

N寸N賀50J⁚宍≡ご岩P昌声パ甘宇叫芸・れ﹇廿 建∧也 宇叫羞Ml﹇

ー140−

Jく国S一国 ト S ロZ︻

椚g．S．，BoomCylinder

き日出USd O ト S ロN︻銘銘く凹 ≧ r

日Nl銘銘く凹 ≧ r

ロNl出じ怒NO↑ S l 一

ZO↑ S − 一 口○鍼NOトS ︻ 一

Jく凹S一日 ↑ S N． M． 寸． れ． や． ト． ∽． か． l〇． 11． tN． lM． l寸． lれ． l￠． l卜． に訓＝

むS喜ロ⁚訂阜邑−音声夕‖ ︺∧出

営コロNO再出銘芦⁚晋＝琶○︻罰ハuY∧幽

ぜ∧虻

宇叫岩下 宇印書卑寸什廿‖仏

︵・琶叫OdN弓8碧葛l擾l−遥且等N2150J⁚霞苫UP呂声パ山宇Y 叫芸﹇‖‖ぜ∧由

宇叫芸01∩

宇叫羞卜︻員∧鱒

−141−

国斡⊃ト出国口ZI J ト U

ロNl鍼・−■ ○ − −

勾くU

S⊃ 由 n 白

丸lJU 銘 l U

Jく凹S↑S n 白

ONl

口Nl銘一−■ ○ − −

ロNI出払n・出じ く 西

ロZ︻錮J− ○ ■ −

口Z︻銘hn・出 じ く m

ON︻出じ式日○ 出

1

Flg・8・10 BucketCylinder

9．ELECTR］CSYSTEM 9．1L［GHT］NG EQU］PMENT Name

SpeciBcation

Headlights

24V75／70W

2

Auxiliary head lights

24V70W

2

ClearanCelamps

24V5W

2

Tumsignallights（front）

24V25W

2

24V25／10W

2

Tumsignal1ights（rear）

24V25W

2

Back−uplamps

24V25W

2

Rear work lights

24V70W

2

Stoplamps

Remarks

Q け

（topofcab）

Front combination lamps

Rear combination lamps

Tail lamps

（FRONTFRAME） （GRILLSUPPORT）

1．HEADLIGHT 2．FRONTCOMBINATIONLAM肝

3．REARWORKLIGHT 4．REARCOMBINATIONLIMP 5．BACK−UPLAMP

Fig．9．1LightingEquipment

一142−

9．2 METERSANDMONITORLAMPS

1．FUELMETER 2．ENGINEWER

6．MONITORLAMP 7．FSSSWITCH

ll．HEADLIGHTSWrrCH 12．STARTERSWITCH

TEMPERÅrUREGAUGE 3・SPEEDOMETER

8・CLmCHCUrrlOFF

13・WIPERSWITCH（FRONT）

SELECTORSWITCH 9．TESTSWITCH lO，WORKLIGHTSWITCH

15．WINDSHIELDWASHE SWITCH

4．CONVERTEROIL TEMPERATURE GAUGE 5．HOURMETER

Fig．9．2InstrumentPanel

−143−

14．WIPERSWITCH（REAR）

恥ble9．1SpeciBcationsandLecationsofSensors

Application

Name

Fue11evelsenderunit Fuelgauge

Thermosenderunit

Enginewater temperature gauge

Specifications

bcation

Floatposition

E 1佗 F

Resistance畠

80 32 10

Resistance詑

80 29．5 10

ResistanCeS2

80 29．5 10

lnsideFueltank

Upper front part of engine

Conv飢鹿roil

Thermosenderunit

Right side of torque converter

temperature gauge

2．MonitorLamps（Warninglamps） Description

Name

園即GI腫OILPRESS

国い

Below specified pressure

GI腫ⅦR皿 Belowspecifiedlevel

園二心RCLEANER

Whenclogged

固′憬ⅢNGB岨

Whenparkingbrakeisapplied

固三BⅦ0ILPRESS

Below specified pressure

固ミBⅦ0ILLEⅦL

Brakeoi11evelisbelowspecifiedleveloroilleakagefrom

国書wo？KINGLIGHT

Whenlighting

固〒B爪RYCMGE

eitherof2brakelines．

Batterychargeisinsu躇cient

ー144−

1払ble9．2 SpecificationsandLecationsofSwitches（Sensors） Name

Applications

Speci丘cations

bcation

Oilpressureswitch Engineoilpressure Workingpressure：0．5±0．1kgkm2 Rightsideofenglne Crurnsonatatmosphericpressure） （Fig．2．2） Level sensor Dustindicator

Enginewaterlevel TumsOFFwhenwaterleveldrops belowspec脆edlevel・ Radiatorpuppertank

Aircleaner

TumsONwhenpressureexceeds Engineairintakepipe 635mmHzO・

TumsONwhenworkingpressure Pressure switch

Parkingbrake

is25±5k釘Cm2． TumsOFFwhenrestoration

（Fig．2．2）

Parking brake valve port B （Fig．4．12）

PreSSureismorethan15kgkm2．

nlmSOFFwhenworking Pressure switch

AccumulatorpIPlng Brakeoilpressur占

pTeSSureis55±7k離m2・

（Fig．4．3）

PreSSureis40±5kgkm2．

TumsOFFwhenoilleveldrops

Level switch

belowspecifiedlevel．

Built in brake oil reservoir （Fig．4．3）

Brakeoillevel Pressuredi飴ren−

tialswitch

TumsOFFwhenpressuredi脆ren− tialismorethan15±3kgkm2．

ー145−

Builtinsplitcylinder （Fig．4．9）

9．3 ELECTRICC］RCU［TD［AGRAM Note：1．Howtoreadcirc扇tdiagram

（1）Astandsforthecordnumber． （2）Bstandsforpowerconsumption（Current）． （3）Cstandsforcontactcapacity．

（4）Wireswithnodiameterindicatedhaveasectionalarea Ofl．25mm20rO．85mm2．

（5）Thecontactsofswitchesandsensorsrepresenta COnditioninwhichtheenglneisatrest，PreSSureO （atmosphericpressure），andoillevelnomal．

2．Starterswitcbterminalconmections

3．Transmissioncontrolterminalconnections

＼ B BR ACC Rl R2 C

F N R 1ST 2ND 3RD 4丁目 F SOL R SOL lST SOL

R

OFF ON

2ND SOL 3RD SOL 4TH SOL

ST

○ ○ ○ ○ ○ ○

4．Transmissioncontrolmanualoperation

HAND OPER＾T10N

▲

Befbretryingtoworkontheelectricsystem，besuretodisconnectthebatteryconnectors・W

disconnectingthebatteryconnectors，茄rstdisconnectthegroundside（−）terminalbefbrertmovingth Otherterminals．

ー146−

Oclo

Fig．9．4 ElectTicCircuitDiagram（1β）

一147−

◎lCC

∈〉＝

◎lCC

Fig．9．5 ElectricCircuitDiagram（2佗）

−148一

OGHO

No．SEW−690BE

lSSUED：March，1995

TOYO UllM■lCl．．uD． TRAD［NGOFFICE：

15・5，1＜home，Nishi・Shimbashj，MinatoJ（u，lbkyolO5，Japan

TELEX：J−23991TCMTOK AJlrightsreseⅣed

FAX：Japan3−35918152 M703001（ト115）

TCM TO▼lUll鵬H■ICl．，LTD．