TCM E820 Wheel Loader Service Manual SEW-617AE - PDF DOWNLOAD

No．SEW−617AE

●丁℃肌好 手三三二￣二三三ニニニ∴￣二ニニ

WHE亡LLOADER ●

匡⑳逗⑳ ●

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TOYOUMRANKICQLJD

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FOREWORD

● TCMoffersawidevarietyofwheelloaderswhichhavebeenenthusiasticallywelcomedbyusersall

overtheworld．TCMModelE820hasalsobeenpopular，butwehavenewlymodifiedapartofi construCtion・Tbgetthemostoftheloader，itisrequiredthatyoubecomefamiliarwithitsfeatures， COnStruCtion，OPeratlngandmaintenanceprocedures・

ThisServiceManualexplainsthestruCtureOftheaboveloaderforservicepersonnelandshopworkers Wehopeitwillbeyourreferenceguideduringserviclngjobs・

ThedescrlPtlOnSandspecificationsdescribedinthismanualaresubjecttochangewithoutnotice・

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TOYOUMTnNK［CO，LTD．

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CONTENTS 0．SPECIFICAT］ONS 0．10UTERVIEWS 0．2 SPECIFICArIONS

1．ENGINEANDRELATEDCOMPONENTS 1．1ENGINE 1．2 LUBRICATINGSYSTEM 1．3 COOLINGSYSTEM 1．4 FUELSYSTEM 1．5INTAKEANDEXHAUSTSYSTEM 1．6 ELECTRICALSYSTEM 1．7 ENGINECONTROLUNIT

2．POWERTRAIN 2．1DRIVEUNIT

2．2 TORQUECONVERTER 2．3 TRANSMISSION 2．3．1CLUTCHSHAFT 2．3．2 POWERFLOW

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2．3．3 TRANSMISSIONCONTROLVAINE 2．3．4 TRANSMISSIONCONTROL

2．4 0ILCIRCULArIONROUTE 2．5 PROPELLERSHAFTS

2．6 DRIVEAXLES（FRONTANDREAR） 2．6．1DRIVEAXLE 2．6．2 DIFFERENTIAL

2．7 WHEELASSEMBLy 2．7．1TIRE

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2．7．2 WHEEL

3．BRAKESYSTEM 3．1SERVICEBRAKE 3．1．1GENERALDESCRIPTION（BRAKELINE） 3．1．2 BRAKEVALVE 3．1．3 DISKBRAKE

3．1．4 BRAKEOILTANK

3．2 PARKmGBRAKE 3．2．1GENERALDESCRIPTION（BRAKELINE）

3・2・2 STOPVALVE（mRKINGBRAKEWE） 3．2．3 SPRINGCHAMBER 3．2．4 DISKBRAKE

4．STEERJNGSYSTEM 4．1GENERALDESCRIPTION 4．2 0ILCIRCULATIONROUTES 43 STEERINGWHEELUNIT 4．4 STEERINGVALVE（ORBITROL）

4．5 PRIORITYVALVE 4．6 STEERINGCYLINDER

5．FRAMEANDCOCKPLT 5．1FRAME

5．2 CENTERHINGEPIN

6．HYDRAUL］CSYSTEM

6・10ILCIRCULATIONROUTES（HYDRAULICCIRCUITDIAGRAM） 6．l．1MAINHYDRAULICCIRCUIT 6．l．2 RETURNFIIJER 6．2 PUMP 6．2．1MAINPUMP

6・2・2 CHARGINGPUMP（BRAKEPUMP）

6．3 CONTROLVAIJVE 6．3．1GENERALDESCRIPTION 6．3．2 0PERATION 6．3．3 RELIEFVALVE

6．4 VALVECONTROLS 6．5 0mTANK

7．LOADHANDLINGSYSTEM 7．1BOOM，BELLCRANKANDBUCKET 7．1．1GENERALDESCRIPTION 7．1．2 BUCKET

7．l．3 BUCKETLEVELER 7．2 CYLINDERS 7．2．1BOOMCYLINDER 7．2．2 BUCKETCYLINDER

8．ELECTRICSYSTEM 8．1LIGHTINGEQUIPMENT 8．2 METERSANDSWITCHES 8．2．1MONITORLAMPS（CLUSTERGAUGEUNIT） 8．2．2 LIGHTINGSWITCH 8．2．3 TURNSIGNALSWITCH

8．3 ELECTRICCIRCUITDIAGRAM

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0．SPECIFICAT［ONS 0．10UTERVIEWS Unit：mm（in）

● Fig．0．10uterViews −1一

0・2SPECIFICAT10NS（WithoptionaJawningcanopy） 1｝uckModels

E＄20 Front−endarticulatedloaderwithdieselenglne

恥pe

BucketCapaclty，

BreakoutForce，

StruCk heaped

0．8m3（1．Oy3） 0・9m3（1．2y3）

boomcylinder bucketcylinder

4100kg（90001bs）

4700kg（104001bs）

SAERatedOperatlngLoad，fu11turn

1440kg（31701bs）

RaisingTime，fu11load

5．4s

LowerlngTime

3．5s 1．Os

U 亡 （弓

∈

L 丘

fwdlst fwd2nd fwd3rd revIst

；■ qJ

8・Okm／h（5・Omph） 14・Okm／h（8・7mph） 34・Okmノh（21．1mph） 13・Okm／h（8．1mph）

Max．TractionForce

4650kg（103001bs）

Gradeability，fwdlst

30degrees

Min・TurnlngRadius，OutermOStPartOfloader

OverallLength，

OverallWidth，

4460mm（175．6in）

bucket on ground in carry position

5035mm（198．2in）

loaderbody

1910mm（75．2in） 1950mm（76．8in）

3800mm（149．6in）

5020mm（197．6in）

bucket

∽ ∈ ○ ●宗

Overal Height，tOPOfcanopy

2790mm（109．8in）

steering wheel knob

亡

4040mm（159．1in）

OutermOStPartOfbucket CenterOfoutermostwheel

2185mm（86．Oin）

萱 ．

∈l

4060mm（159．8in）

OverallOperatlngHeight，bucketfu11yraised Wheelbase Tread

2200mm（86．6in）

frontwheel

1470mm（57．9in） 1470mm（57．9in）

rearwheel

−2−

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E＄20 FrontOverhang，1nCarryPOSition

1885mm（74．2in）

RearOverhang

935mm（36．8in）

46degrees

Rear Overhang Angle Min．GroundClearance，reardifftrentialcase

950mm（37．4in）

loweredge 3165mm（124．6in）

∽ 已 ∈〉 ●

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2460mm（96．9in） 扇 亡 凹

． 白

950mm（3．4in）

Reach，at450dischargeangle BucketRoll−backAngle，incarryposition

50degrees

BucketDumplngAngle，bucketfu11yraised

50degrees

DigglngDepth，buckettiltedforwardlOO

220mm（臥7in）

Towing Pin Height

630mm（24．8in）

・− ．．∈ ．汐 qJ WeightofLoader（W・aWning）

4720kg（104081bs）

き

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1，ENGJNEANDRELATEDCOMPONENTS l．1ENGINE l・GeneralDescription TheenglnemOuntedonthisloaderisa4−CyCle，Water−COOled，OVerhead−Valve，in−1inedieselenglne

Withverticalvortexchamber． Theenglneismountedattherearoftheloaderanditspoweristransmittedthroughtheflywheeland lnPutPlateintothetorqueconverter．

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Fig・1・1EnglneandRelatedComponents −4−

V3300DieselEngine 4−CyCle，Water−COOled，OVerhead−Valve，in−1inediesel

englneWithverticalvortexchamber Numberofcylinders−borexstroke

4−98mm（3．86in．）xllOmm（4．33in．）

Total displacement

3．318ゼ（202．5cu．in）

Compression ratio

22．6

Engineperformance

Ratedspeed Ratedoutput Maximumtorque

2150 rpm

Full−loadmin．consumptlOnratio

175g／psh（at1600rpm）

56ps（56．8HP）（41・2kW）

21kg−m（152ft−1bs）（atapprox・1400rpm）

Dry weight

about260kg（5731bs）

Dimensions（OVeralllengthxoverall Widthxoverallheight）

800mmx558mmx745mm（31．5inx22．Oinx29．3in）

Firing order

1−3−4−2

Rotational direction

Clockwisewhenviewedfromcoolingfan

Starting aid

Glow plug

Stopping system

Key switch type

Unloadedmax．speed （Whenseparatelymeasured）

Unloadedmin．speed （Whenseparatelymeasured）

Allowabletiltingangle

lessthan2350rpm

800±35rpm 300infourdirectionswhenviewedfromflywheel

Maintenancedata

Vaheopenlngandclosingtlmlng

Open

Closed

Intakevalve 140beforeTDC 360afterBDC Exhaustvalve 450beforeBDC Valve clearance

170a氏erTDC

Intakevalve（COld）：0．23−0．27mm（0．009−0．011in．） Exhaustvalve（COld）：0．23−0．27mm（0．009−0．011in．）

Injection timing

12O−140beforeTDC

Injectionstartpressure

140kg／cm2（1990psi）

Compressionpressure

29−33kg／cm2（410−470psi）（at350rpm）

ー5一

2．OuterViews

1．THERMOSTATCOVER 2．WERTEMPERArURESENSOR 3．OILDIPSTICK 4．OILPRESSURESWITCH 5．ALrERNATOR 4

6．0ILPAN 7．EXHAUSTMANIFOLD 8．STARTERMOTOR

5

9．FLYWHEELHOUSING

10．NOZZLEHOLDER ll．INLETMANIFOLD 12．FUELFILTER 13．0ILFILTER 14．DRAINPLUG 15．ENGINESTOPSOLENOID 16．SPEEDCONTROLLEVER 17．ENGINESTOPLEVER 18．INJECTIONPUMP 19．FEEDPUMP 20．COOLINGFAN

Fig・1・2 V3300DieselEnglne −6−

3．EngineMounting TheenglneisconnectedtothedriveunitandsupportedtotherearframeatpolntSOntherightandleft Sides，Withmountlngrubbersatbothsidesofthecylinderbody・

Note：B＞ E：：＝コ10kg−m（72ft−1bs） 控＞ぢ＝コ8・5kg−m（61h−1bs）

1．ENGINE

5．JOINT

9．JOINT

2．BRACKET

6．PACKING

lO．PLUG

3．CUSHIONRUBBE

7．PIPEJOINT

4．（REARFRAME）

8．HOSE

Fig．1．3 MountlngOfEnglne −7−

1．2 LUBRICATINGSYSTEM Lubrication

Forced circulation

Lubricating pump

Trochoid pump

Filtration

Full−flowtype，（w／manualpump）

Cooling

Water−COOlingtype

Oilpressurea叫uster

PistonsprlngtyPe

LubricatlngOilcapaclty

（HI）13e（3・4gal）（LO）9e（2．4gal）

TheenglnePartSarelubricatedbyforcedcirculationmethodbytheoilpump・TheenglneOilispi upfromtheoilpanbytheoilpumpanddeliveredthroughtheoilfiltertoeachsectionforlubrication．

15 14

1．OmFILTER 2．OmSTRAINER 3．RELIEFVALVE 4．OmPAN 5．0ILPUMP 6．CRANKSHAFT 7．PISTON 8．IDLEGEAR 9．GOVERNOR lO．CAMSHAFT ll．OILSWITCH 12．TAPPET 13．PUSHROD 14．ROCKERARM 15．ROCKERARMSHAFT 16．ROCKERARMBRACKET 17．VALVE

Fig・1・4 EnglneLubricatlngSystemSchematicDiagram −8−

1．3 COOLINGSYSTEM Watercooling，V−belttype

Cooling Cooling伽n

Dischargetype，430mm（16・9in）dia・6−bladed

Type Driving

V−beltdrive

Water Pump

V−beltdriven，Centrifugaltype

VVaterthermostat 「吋pe

Wax type

OpenlngtemPerature

76．50C（1700F）

Full−OPenlngtemPerature

900C（1940F）

Radiator

forenglne

Corrugatedfin（louver）＆tube

for torque converter

Water−COOledmultipleplate

Cap opening pressure

O．9kg／cmユ（12．8psi）

Dry weight Coolingwatercapaclty

14．4kg（31．71bs） 14．7ゼ（3．9gal）

● −i！■ ●￣ ￣

￣●■

Fig．1．5 EnglneCoolingSystem −9−

1．GeneralDescription

TheenglneCOOlingsystem・isofwater−COOledforced−CirculationtypeuslngaWaterPumP・

CoolingwaterpressurizedbythewaterpumpcirculatesandcooIseachcomponentoftheenglne・ Whenthecoolingwatertemperaturerisesenoughtoopenthethermostat，thecoolingwaterflowsintothe radiatorwhereitstemperatureislowered，beforereturnlngtOtheenglnetOCOOleachcomponentofthe englne・

ThethermOSenderunitinstalledinthethermostathouslngmOnitorsthecoolingwatertemperatureand

thetemperatureisindicatedbywayofthe englneWatertemPeraturegauge‖oftheclustermetero dashboard‥

Fig・1・6 EnglneCoolingUnit

−10−

2．Radiator

2

3

Radiatorcapoperationpressure O・9kg／cm2（12・8psi）

A．fromRESERVOIRTANK

1．RADIATORCAP

B．COOLINGWERINLET

2．COREASSEMBLY

C．COOLINGWjmROUTLET

3．OILCOOLERASSEMBLY

D．0ILCOOLERINLET

4．DRAINCOCK

E．OILCOOLEROUTLET

Fig．1．7 Radiator

−11−

1．4FuetSystem Injection pump

Bosch type

Injection nozzle

Throttle type

Fuelftedpump

Mechanicalpumpdrivenbycamshaft（diaphragmtype）

Fuelfilter

Full−flowtype

Governor

Governlng

Centrifugal，all−SpeedcontroI

Lubrication

Forcedcirculationtype

Fueltankcapaclty

75ゼ（19．8gal）

1．GeneralDescription

Theftedpumpdrawsfuelfromthefueltankandforcesitunderpressurethroughthefuelnlterinto lnJeCtionpump．Thefuelisthendistributedunderpressuretothein）eCtionnozzleandinjectedintothe combustionchamber．

Feed line 一●− − − Returnline

l．FUELTANK

4．FEEDPUMP

7．INJECTIONPIPE

2．FUELFILTER

5．INJECTIONPUMP

8．INJECTIONNOZZLE

3．PRIMINGPUMP

6．AIRBLEEDINGCOCK

9．OVERFLOWPIPE

Fig・1・8 EnglneFuelSystemSchematicDiagram −12−

Procedurehrbleedingairfromthefuelline ①Turnthebleedingcockoftheinjectionpumpcounterclockwise．Drawfuelwiththeprimingpum andstarttheenglne．

②Bleedairforaboutoneminutewiththeenginerunning．Afterthat，raCetheenginelOtimesormore．

③shutofftheengineandclosethebleedingcock． 2．Fuell払nk

Thefueltankisweldedtotheinsideoftherearframe，Withitsfuelhoses（SuCtionandreturn

COnneCtedtotheenglne．

ThefueltankisequlPPedwithafuellevelsenderunitlinkedtothefuelmeteronthedashboard．

2 3

二こ∴ ／ ／

愈 ∴J

〃1U

・■．J≠・一叶い

ドレ 一 lD

へ帖ト

Y！レト：﹂≠

′

′′ァニ＼

4

ク／′＿′／

′ノ ／′

ノー：レ

■弓＝⁚早．＼

：⁚日鼻／

＋

●

十ラ

8

9

10

′リ

1．SENDERUNIT

5．CAP

9．DRAINPLUG

2．FUELHOSE，SUCTION

6．CYLINDER

lO．STRAINER

3．FUELHOSE，RETURN

7．KEY

4．（REARFRAME）

8．DRAINPLUG

Fig．1．9 EngineFuelSystem −13−

1．51NTAKEANDEXHAUSTSYSTEM Aircleaner

Cyclonepapertype（6 ）

Mumer

Porous separators

1．GeneralDescription Theintakesystemoftheenglneisdesignedsothattheoutsideopenairisdrawnthroughtheintake

hoseandfilteredbythe aircleanerbeforebeingsuckedintotheinletmanifold・Theaircleaneri equlPPedwithadustindicatortoinformtheoperatorwhentheaircleanerelementshouldbecleaned・ Theexhaustsystemisdesignedsothattheexhaustgasfromtheexhaustmanifoldisdischargedthrough

themufflerwherethepressureandtemperatureoftheexhaustgasareloweredintotheatmosphere・

▲BecarefulnottotouchthemumerorexhaTStmaniR）1dsincetheyarehotwhentheengi runnlngandfbrawhileafteritisshutofr；OtherwISe，yOumightburnyourhand・

−14一

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2 1

1．MUFFLER 2．RUBBERMOUNT 3．EXHAUSTTUBE 4．AIRINTAKEHOSE 5．AIRCLEANER 6．AIRCLEANERHOSE

Detailsofmufflermount

Note：B＞14＝ゝJointofthemufflerandexhausttube：Exhaustseal（EquivalenttoCHcement No．600madebyIshikawaGasket）

跨＞Tightenthedoublenutsothattheboltendandnutendareflush・ Fig．1．10IntakeandExhaustSystem −15−

2．Aircleaner

1．BODY

4．VACUATORVALVE

2．ELEMENT

5．INDICATOR

3．COVER

Fig．1．11AirCleaner

−16−

1．6 ELECTRICALSYSTEM Battery Voltage and capacity

12V，52Ah（5−hourrate）

Quantity

2

Weight（PerCaSe）

17．1kg（37．71bs）

Starter motor 「吋pe

Engagemagnettype

Ⅵ）1tageandoutput

24V3．2kW

AlternatOr

Type Voltage and output Drivlng

AC type 24V，0．72kW（30A） V−beltdrive

Automatic charging regulator

Type

Thyristor type

Coldstartaid

Quickglowplug

Stopping device

Keyswitchtype

1．Battery

Twobatteriesareinstalledinsidethehoodattherightsideoftherearframe． Wheninspectionofthebatteryunitisneeded，Openthehood・

▲DANGER！Used。eCa。ti。nWhenhandlingthebatte，y。nit．

1・Nofire・Nosparks・Neversmokeorusefireornakedflamenearthebatteryunitsinc flammablegasisalwaysreleasedfromthebattery・

2・Thebatteryelectrolyteisdilutesulfuricacid・Itwi11causepainfu1andseriousburnsifitget Ontheskin．Itcancauseblindnessifitgetsintoeyes．Ifelectrolytegetsintoyoureyes，nuSh youreyesoutwithacoplOuSamOuntOfwaterandgettoadoctonIfelectrolytegetsonto yourskin，flushoffwithacoplOuSamOuntOfwaterandgetmedicalhelp・

ー17−

2．ElectricCircuit Fortheelectriccircuitdiagramoftheenglne，reftrto‖Fig・8・5ElectricCircuitDiagram・

（1）Generaldescription

①Theenginecoldstartaidisaglowplug．Ifacoldenginewon・tstart，holdthestarterswitchtotheON POSitiontopreheattheenglne・Then，turnthestarterswitchtoSTARTtocranktheenglne・

②Theengineshut−Offdeviceisafuelcut−0fftype．TurningthestarterswitchtoOFFwillshutoffthe engine・（EngineKeyShut−0ffDevice） Formoreinformationontheenginekeyshut−0ffdevice，referto

1．7ENGINECONTROLUNIT．H

（2）Starterswitch Thestarterswitchhas3positions：ON，OFFandSTART・

▲EngineNeut？1戸tart

tJnlessthetransmlSSlOnCOntrOIswitch（shif（1ever）isinneutral，theenginewon■tstart．（Ref

‖2．3．4TRANSMISSIONCONTROL．一一） ThispreventstheloaderfrommovlnguneXPeCtedlywhenthestarterswitchisturnedon．

TERMINAL

TART

POSITION OFF ON START

（Rearside）

（Frontside）

Fig．l．12 StarterSwitch

−18−

B BR ACC Rl R2 C ○ ○ ○

1．7 ENGJNECONTROLUNIT l．AcceleratorPedal TheenglneSPeediscontrolledbyoperatlngtheacceleratorpedal． Whentheacceleratorpedalispressed，thegovernorcontrolleveroftheenglneisactuatedthroughthe COntrOIcablesothatanenglneSPeedmostsuitedtotheworkingconditionisobtained． Inaddition，themax．rpmcanbeselectedbythemild／powermodeselectionsystem（MPS）．

● ● Note：B＞紹＝ゝThreadedpart：LOCTITE＃262 1．CABLE

7．BRACKET

13．KNOB

2．BRACKET

8．STOPPERBOI＿J

14．LEVER

3．（ENGINE）

9．ROD

15．ROD

4．PEDALCOVER

lO．BALLLINK

16．STOPPERBOIX

5．PEDAL

ll．SPRING

17．STOPPERLINK

6．PIN

12．BELLCRANK

18．SPRING

Fig．1．13 AcceleratorPedal −19−

2・Mild／PowerModeSelectionSystem（MPS）

Themild／powermodeselectionsystemisamechanismwheretheenginemax．rpm（athighor

SPeed）canbeselectedbyoperatingthelever・Bymovingtheselectleverattherightsideofthecockpit

Vertically，therodextendingfromthelevermovesthestopperlinktowhichthestopperboltisfitted，tO

Changeoverthemi1dandpowermodes．

＼0／1

1．KNOB 2．LEVER 3∴ROD

4．STOPPERBOIJ

与三−、 Note：B＞A4justthehigh−idlerpmto1900rpminthemildmode． a：aPPrOX．44mm（1．73in）

Fig・1．14 Mild／PowerModeSelectionSystem −20−

5．STOPPERLINK 6．BELLCRANK

3．EngineKeyShut・OfrSystem Adieselenglnedoesnothaveanyelectriclgnltiondevicelikethegasolineenglne，SOitcannotusually beshutoffsimplybyturningthemainswitch（StarterSWitch）0ff． Forthisreason，thewheelloaderhasanenginekeyshut−0ffdeviceuslngaSOlenoid．

WhenthestarterswitchisturnedtotheOFFposition，theenglneStOPSOlenoidoperatestocutoffthe fueltotheinJeCtionnozzle，thusshuttlngOfftheenglne．

●

1．ENGINESTOPSOLENOID 2．SPEEDCONTROLLEVER 3．GOVERNOR 4．ENGINESTOPLEVER 5．INJECTIONPUMP 6．FEEDPUMP

Fig．1．15 EngineKeyShut−0ffDevice

−21−

2．POWERTRALN Thepowertrainconsistsofthedriveunit（torqueconverterandtransmission），PrOPellershafts，front

andrearaxles，andtires． Powerfromtheenglneistransmittedtothedriveunitwhereitisreducedinspeedanddistributed throughthepropellershaftstothefrontandrearaxles．Thepowertransmittedtoeachaxleisfurthersent

throughthewheeltothetiresothattheloadermoves． TheschematicdiagramofthepowertransmissionoftheloaderisglVenbelow．

≡二≡

＝＝≡−≡＝−−一三＝こ二

C D：PROPELLERSHAFT

Fig．2．1PowerTrain −22−

2．1DRIVE UNIT Torqueconverter Name

TCM617−25（EXEDYlO．5

）

Type

3−element，トstage，Slngle−Phasetype

Oilcooler

Water−COOled，multi−Platetypel）

Pressuresettlng，referencevalue

2．8kg／cm2（40psi）

CharglngPumP Name

KPlO15三）

Type Drivemethod

Gear type Gear type

Discharge（atloading）

38．O e／min（2100rpm，20kg／cm2（380psi））

Transmission Name

TCM617−25

Type Speeds

Fullpower−Shift，COnStant−meShtype

3fwd／1rev

Clutch［transmission］

Type

Wetmulti−disctype

Operation

Hydraulic

Pressure setting

17．0−20．Okg／cm2（240−280psi）

Oil capacity

11ゼ（2．9gal）

Weight［driveunit］

275kg（6061bs）

Notes：1）Theoilcoolerisinstalledintheradiatorlowertank．Foritsspecificationsandconstruc referto一一1．3COOLINGSYSTEM． 2）Forthespecificationsofthechargingpump，referto‖6・2PUMP一■

Generaldescription Thedriveunitconsistsofacombinationofatorqueconverterandatransmission，formlngaCOmPaCt One−PleCebody，WiththeconverterhouslngCOnneCtedtothetransmissioncase・

Powerfromtheenglneistransmittedthroughtheflywheelandtorqueconvertertothetransmission・ Theenglneandthedriveunitareconnectedtoeachotherbylinkingtheenglneflywheeltothe COnVerter

sfrontcoverwithadrytypelnPutPlate・

−23−

●

Note：B＞6S：：：：：：：コ20．7kg−m（150氏」bs），正＝ゝthreadedarea‥LOCTITE＃262 臣＞ぢ：＝コ22・8kg−m（165糾bs）

B＞ E：：：＝］5．1kg−m（36．9f［−1bs），正＝ゝthreadedarea‥LOCTITE＃262 陸＞忙＝：恥Enginepilotbushing：Grease

1．DRIVEUNIT

4．REARFRAME

2．BRACKET

5．PLATE

3．RUBBERMOUNT

6．INPUTPLATE

Fig．2．2 DriveUnitMount

ー24−

Clutchoilpressure

‥17−20kg／cm2（242−284psi）

Safetyvalvereliefpressure‥6・Okg／cm2（85psi）

SectionA−A

l．LUBRICArIONOILINLETPORT

ll．AIRBREATHER

21．SUCTIONTUBE

2．STOPVALVEDRANPORT

12．DRAINPLUG

22．STRAINER

3．LUBRICArIONOILOUTLETPORT

13．CONVERTERHOUSING

23．OILLEVELSIGHTGAUGE

4．CONVERTEROUTPRESSURECHECKPORT

14．TRANSMISSIONCASE

24．SPRmG

5．OILTEMPERArUREGAUGEFITTINGPORT

15．PUMPDRIVEGEAR

25．PLUNGER（SAFETYVAI一VE）

6．F2CLUTCHPRESSURECHECKPORT

16．CHARGINGPUMP

26．SHAFT

7．FICLUTCHPRESSURECHECKPORT

17．SPEEDCHANGESPOOL

27．GEAR

8．F3CLUTCHPRESSURECHECKPORT

18．PARluNGBRAKE

28．CAP

9．REVCLUTCHPRESSURECHECKPORT

19．CONTROLVAINE

lO．CONVERTERINPRESSURECHECKPORT

20．SOLENOIDVAINE

Note：臣祀＝ゝ

●

s。：

LOCTITEFMD−127

● ● ●

1．CHARGINGPUMP

16．DRAINPLUG

2．PUMPSLEEVE

17．TURBINESHAFrGEAR

3．GEAR

18．F3／REVERSESHAFTASSEMBLY

4．BEARINGSUPPORT

19．DISTRIBUTORCAP

5．OILBAFFLE

20．F2／FISHAFTASSEMBLY

6．IMPELLERHUBGEAR

2l．DISTRIBUTORCAP

7．OmSEAL

22．BRAKEDISK

8．TURBINESHAFT

23．IDLERSHAFr

9．CONVERTERWHEEL

24．0ILSEAL

10．CONVERTERHOUSING

25．BRAKECARRIER

ll．IDLERGEAR（59T）

26．IDLERGEAR（74T）

12．IDLERGEAR（30T）

27．OILSEAL

13．SENSOR

28．OUTPUTSHAFT

14．OILBAFFLE

29．FLANGE

15．OUTPUTSHAFTGEAR

30．TRANSMISSIONCASE

Note：B＞疋⊃ゝMatingsurfaceoftheconverterandthetransmissioncase：LOCTITEFMD−127 B＞Procedurefor叫ustingtheclearancebetweenthesensorandtheplate： Applythesensortotheplateandbackoffthesensor2／3turn．

紹＝ゝThreadedarea：LOCTITE＃572

臣＞紹＝ゝMatingsurfaceoftheconverterandthechargingpump：LOCTITEFMD−127 B＞ぢ＝：：コ10．3kg−m（74．4psi） 匪＞6：：：＝コ5．1±1．Okg−m（36．9±7．2糾bs）

匝＞紹＝ゝThreadedarea：LOCTITE＃262

匡＞ぢ＝コ55kg−m（397．5ft−1bs），紹＝ゝthreadedarea：LOCTITE＃262

Oilsealinstallation

心Oilsealouterdiameter（madeofmetal）：LOCTITE＃262 rqBetweenliptypeoilseallips‥greaSe

rqchamferedandslicingareasofcompanionflange：greaSe

16

Fig．2．4 DriveUnit（2） −26−

2．2 TORQUECONVERTER

Thetorqueconverterconsistsofaconverterwheelassembly，aPumpdrive，andaturbineshaf

COnVerterWheelassemblyconsistsofanimpellerandaturbinelocatedoppositeeachother，Withastator Wheelin−between，andhousedinthetorqueconvertercasefilledwithoil・

ThepumpdrivedrivesboththecharglngPumPandthemainpumpthroughthepumpdrivegear

installedontotheimpellerhub，

●

●

Note：B＞（芯＝コ6．2−7．4kg−m（44・8−53・5ft−1bs） 駐＞〆⊂⊃』Threadedarea：LOCTITE＃242

1．IMPELLER

4．TURBINE

7．WASHER

2．BALLBEARING

5．INPUTPLATE

8．BALLBEARING

3．FRONTCOVER

6．STATOR

9．COLLAR

Fig．2．5 ConverterWheelAssembly −27−

Powertransmission

Powerfromtheenglneistransmittedthroughtheflywheel，inputplate，frontcover，impeller，turb

turbineshaft，andtothetransmission．

Oilnowroute： ThetorqueconverteroildeliveredfromthetransmissioncontroIvalvepassesthroughtheoilpassagein thestatorsupportintotheconverterwheel． Astheenglneisstartedandtheimpellerrotates，theoilbetweenthevanesoftheimpelleristhrownout

bycentrifugalforce，flowlnglntOthevanesoftheturbine・Ithitsthevanesoftheturbineatananglewhi

inturnrOtatetheturbineshaft・Thereactiontorqueoftheoilproducedbytheoilflowhittingthevanesof theturbinebecomestheoutputtorqueoftheturbineshaft・ ThestatorcontroIstheoilflowleavlngthevanesoftheturbineinacertaindirection，directlngltinto theimpeller，thusincreaslngthetorque・

Partoftheoilinsidetheconverterwheelpassesthroughtheoilpassageinthestatorsupporttotheoil COOler・Asafetyvalveisinstalledatthetorqueconverteroilinletport，tOreleaseexcessoilintothe

COnVerterhouslng．

† toOILCOOLER

Fig・2・6 0ilFlowInsideTorqueConverter −28−

2．3 TRANSMISS］ON

Thetransmissionconvertsthespeedanddirectionofpowertransmittedfromthetorqueconverter・

Thetransmissionconsistsoftwoclutchshaf［assemblies，abackgear，anidlershaft，anOutPutS Parkingbrake，andacontroIvalve・ 2．3．1CLUTCHSHAFT

Theclutchshafthastwoclutchshaftassemblies：Oneforlstand2ndgearsinforwardandonefor3rd gearinfbrwardandreversegear・ Theclutchshaftassemblyhasclutchdisksforeachspeed，andturnSPOWertranSmissiononandoff・

1．SHAFT＆DRUM

7．PISTON

13．SEALRING

2．FRONTGEAR

8．SEALRING（OUTER）

14．PLUG

3．F2HUBGEAR

9．BLEEDERVALVE

15．SPRINGRETAINER

4．ENDPLATE

lO．SEALRING（INNER）

16．RETURNSPRING

5．DISK

11．BELLVILLESPRING

6．PLATE

12．FIHUB GEAR Fig．2．7 TypicalClutchShaftStructureforF2andFl −29−

●

15 16

Note：圧＞l⊂＝恥Slidingare？：greaSe （Pay？ttentlOntOtheinstallation directlOn・Seethedetaildrawings）

⊂竺フ 臣＞ DetaiIofareaA

臣＞旦ぬ‖ofare摘

1．SHAFT＆DRUM

7．PISTON

13．SEALRING

2．FRONTGEAR

8．SEALRING（OUTER）

14．PLUG

3．F3HUBGEAR

9．BLEEDERVALVE

15．SPRmGRETAm

4．ENDPLATE

lO．SEALRING（INNER）

16．RETURNSPRmG

5．DISK

ll．BELLEVILLESPRING

6．PLATE

12．REVERSEHUB GEAR Fig．2．8 TypicalClutchShaftStructureforF3andreverse

一30−

Operation TheclutchisoperatedbypressurizedoilfromthetransmissioncontroIvalve・Thepressurizedoilf

thecontroIvalveflows，PaSSlngthroughthedistributorcapandtheoilpassagesintheclutchshaft，t

backoftheclutchpistontomovetheclutchpiston・Theclutchpistonthenlocksuptheinnerando

Clutchdisks，thusengaglngtheclutchsha氏andclutchhubtogethertotransmitthepowertothe sha銃．

1 2

3 4

Pressurized oil 1．CLUTCHSHAFT 2．CLUTCHPISTON 3．OUTERCLUTCHDISK 4．INNERCLUTCHDISK 5．CLUTCHHUB

Fig．2．9 ClutchinEngagement

WithnopressurizedoildeliveredfromthecontroIvalve，theclutchpistoniskeptbackbythereturn SPrlng，unlockingtheinnerandouterclutchdiskstoallowtheclutchshaftandclutchhubtorotate independently，SOthatnopoweristransmittedtothedriveshaft・

1．CLUTCHSHAFT 2．CLUTCHPISTON 3．OUTERCLUTCHDISK 4．INNERCLUTCHDISK 5．GAP 6．RETURNSPRING 7．CLUTCHHUB

Fig．2．10 ClutchinDisengagement

−31−

2，3．2 POWER FLOW

l．Shiftleverinneutral WithnoneofFl，F2，F3andreverseclutchesengaged，thepowerfromthetorqueconverterrotatesthe F2／FlandF3／Reverseshafts，butisnottransmittedanyfurther．

2．Shiftleverinlstspeedfbrward Whentheshiftleverisputintotheforwardlstclutch，thepowerfromthetorqueconverteris

transmitted，PaSSlngthroughtheturbineshaftgear，F2／Flfrontgear，F2／FIshaft，FIclutch，Flh idlergear（74T），idlershaft，idlergear（30T）andoutputshaftgear，tOtheoutputshaft．

Fig・2・11PowerFlowinlstSpeedForward −32−

3．Shiftleverin2ndspeedn）rWard Whenthe shiftleverisputintotheforward2ndclutch，thepowerfromthetorqueconverteris

transmitted，paSSlngthroughtheturbineshaftgear，F2／Flfrontgear，F2／FIshaft，F2clutch，F

idlergear（59T），idlershaft，idlergear（30T）andoutputshaftgear，tOtheoutputshaft．

Fig．2．12 PowerFlowin2ndSpeedForward

−33−

4・Shiftleverin3rdspeedfbrward Whentheshiftleverisputintotheforward3rdclutch，thepowerfromthetorqueconverteris

transmitted，PaSSlngthroughtheturbineshaftgear，F3／Rfrontgear，F3／Rshaft，F3clutch，F3hub idlergear（59T），idlershaft，idlergear（30T）andoutputshaftgear，tOtheoutputshaft．

Fig．2．13 PowerFlowin3rdSpeedForward

−34−

5．Shiftleverinreverse

Whentheshiftleverisputintothereverseclutch，thepowerfromthetorqueconverteristransmitted

PaSSlngthroughtheturbineshaftgear，F3／Rh．ontgear，F3／Rshaft，reVerSeClutch，reVerSehub

gear，idlergear（74T），idlershaft，idlergear（30T）andoutputshaftgear，tOtheoutputshaft．

●

●

Fig．2．14 PowerFlowinReverse −35−

2．3．3 TRANSMISS10NCONTROLVÅLVE ThetransmissioncontroIvalveselectivelysendsoiltoselectedclutchestoswitchoverthedirections andspeedsoftheloader． ThecontroIvalveconsistsofavalvebodyandsolenoidvalveswhichareengagedanddisengagedby

theshiftlever・Thisshiftsthespoolinthevalvetocontroltheclutchlock−uPOil・ ThecontroIvalvealsohasamodulationmechanismwhichincreasestheclutchoilpressuregradual1y Whentheclutchisinengagement．

8 7

9

1．ORIFICE，0．8mm（0．031in）dia． 【FORINCHINGOPERATION］

10．REGULATORSPOOL ll．ImRSPRING

【WITHORIFICE，

2．TUBE

12．OUTERSPRING 13．MODULATIONSPOOL

0．7mm（0．028in）dia．］

3．VALVEBODY［UPPER］

4．SPRINGPIN 5．GASKET 6．VALVEBODY［LOWER］

7．BALL 8．SPRING 9．ORIFICE，l．2mm（0．047in）dia． ［FORF3】

［WITHORIFICE， 0．8mm（0．031in）dia．］ 14．INNERSPRING 15．OUTERSPRING 16．ROD 17．LOADPISTON 18．SOLENOIDVALVE 19．GASKET

Fig．2．15 TransmissionControlⅥ11ve（1） −36−

20．FLOWSENSINGPISTON

21．SPEEDCHANGESPOOL 22．SEAL 23，PIN 24．SPRING 25．BALL 26．INCHINGSPOOL 27 ROD 28．SPRING

1112

13

18

14151617

19

Fig．2．16 TransmissionControIValve（2） −37−

Orificediameter：mm（in）

HydrauLicCircuitDiagram

Fig．2．17 TransmissionControlⅥ11ve（3）

−38−

●

toHANDVALVE

1．INLINEFILTER

5．TORQUECONVERTER

2．CHARGINGPUMP

6．SAFETYVALVE

3．STRAINER

7．TRANSMISSIONCONTROLVAINE

4．TRANSMISSIONSUMPTANK

8．CLUTCH

Fig．2．18 ControlValvePipingDrawlng −39−

（1）Neutral

①Theoilwhichhasenteredtheinletport（1）ofthecontroIvalveflowsthroughthesmallhole‖a‖inth regulatorspoolintothechamber（2）atthebackofthespool，tOShiftthespooltotherightinthe

figure・Theoilwhosepressurehasbeenregulatedtotheclutchlock−uPPreSSureflowsintoth modulationspooIcircuit（3）・Excessoilflows，PaSSingthroughthecircuit（4），tOthetorqueconverter．

②Theoilwhichhasreachedtothecircuit（3）flowsthroughthetaperedoilpassageinthemodulation SPOOltothecircuit（5），Whichleadsthroughthemainorifice‖b‖，tOthecircuits（6，7）．

③Theoilwhichhasbeendeliveredtothecircuit（6）flowsthroughtheinchingvalveintothespee ChangeValvecircuit（8）andisblockedthere．

Fig．2．19 Neutral −40−

（2）ShiftingintoIstspeedfbrward

①Theoilwhichhasenteredthecircuit（8）flowsthroughtheoilpassageinsidethespeedchang totheforwardlstclutch（FWDIST）．Theoilpressurefromtheorifice‖b

tothecircuits（6，7，

dropsbecausetheoilisnlledintotheclutch・

②whenthepressureinthecircuit（7）drops，thepressuredifferentialisproducedacrossth SenSingvalveorifice−1cl

toshiftthepistontothelef［inthefigureanddrainoilfromthecircuits（9，

10）．

③Theloadpistonofthemodulationvalveismovedtotherightbythespringforcetoshiftth modulationspooltotherightinthefigure，thusdeliverlngOnlythenecessaryamountofoilfromthe Circuit（3）tothecircuit（5）．

Fig．2．20 ShiftinglntOIstSpeedForward −41−

（3）Clutchinengagement

①whentheforwardlstclutch（FWDIST）isfi11edwithoil，theoilpressureinthecircuit（7）increase andtheflowsenslngValvepIStOnShiftstotherightinthefiguretoclosethedraincircuit．Theoil flowsthrough‖c‖intothechamber（10）atthebackoftheloadpistonofthemodulationvalve．

②ontheotherhand，theoilinsidethemodulationvalveflowsfromthecircuit（3）tothecircuit（5）， PaSSeSthroughtheori缶ce‖dl

inthespooltothechamber（11）atthebackofthespool．Therefbre，the

modulationspoolmovesduetotheoilpressureinthechambers（11）and（10），graduallyincreasing theclutchoilpressure．

③whentheclutchoilpressurereachesthespecinedvalue，theloadpistonofthemodulatepistonst atthestopperposition．Then，themodulationspoolispushedbytherodtoopenthepassagebetween

thecircuits（3）and（5）．Inthisstep，allpressureinthecircuitisequaltotheclutchlock−uPPreSSure

regulatedbytheregulatorvalveandtheclutchiscompletelyengaged・

●

Fig・2・21ClutchinEngagement t42−

（4）Shiftinginto3rdspeed払rward（Operationofthecheckvalveandtheorifice） ①Theclutchoperatesasdescribedin‖（2）ShiRingintoIstspeedfbrward

whenshiftedinto3rdspe

forward．

②whenoilischargedintothe3rdforwardclutch（FWD3RD），theoilflowsfromthecircuit（12

throughthecheckvalveandtheorince 一e‖intothechamber（10）atthebackoftheloadpistonof modulationvalve．

③Theclutchoilpressurerisesandtheclutchlock−uPisachievedmorequicklywhenthefbrward

gearisselectedthanwhentheothergearsareselected・（TheF3clutchneedstobeengagedqu thantheotherclutchesbecauseitsreductionratioissmall．）

Fig．2．22 3rdSpeedForward −43−

（5）Inchingvalveoperation

三言・tこてよ ，

③Theoilinthecircuit（6）isblockedwhiletheoilinthecircuit（8）isdrained．Theclutchisdisengaged tocutoffthepowertransmission．

Fig・2・23InchingValveOperation −44−

（6）Solenoidvalveoperation

AsolenoidvalveisinstalledatthelowerpartOfthecontroIvalvebody・ TheinchingswitchnttedtothebrakepIPlngturnSthesolenoidvalve‖ON‖or1．OFF

tooperatethe

inchingspool． a．SolenoidinOFFstate Theoilwhosepressurehasbeencontrolledbythe regulatorisalwaysflowlngthroughtheorificeinto thesolenoidvalve．WhenthesolenoidisintheOFF State，theoilpassesthroughinsidethe solenoid Valveandisdrained．TheoilpressureatthepolntP isOkg／cm2（Opsi）．

Fig．2．24 SolenoidinOFFState

b．SolenoidinONstate

Whenthesolenoidisexcited，theinsideofthevalve isblockedtooilflow．Theoilisnolongerdrained・ TheoilpressureatthepointPbecomesequaltothe regulatorpressure・Theinchingspoolisoperatedby

this oil pressure.

Fig．2．25 SolenoidisONstate

ー45−

2．3．4TRANSM［SS［ONCONTROL ThetranSmissioncontroIsystemisamechanicaltypewhichturnsonandoffthespeedchangespooIsof thetransmissioncontroIvalvebytheoperationoftheshiftlever，tOSWitchoverthepassagesoftheclutch Oil，thuscontro11ingthetravelspeedoftheloader．

● ● ●

Note：B＞紹＝ゝThreadedarea：LOCTITE＃262 B＞パ＝＝恥Bushinginside：greaSe

1．GRIP

6．BALLPLUNGER

11．NEUTRALSWITCH

2．ROD

7．SHAFT

12．BACKLAMPSWITCH

3．SHIFrLEVER

8．BALLLINK

13．BRACKET

4．PIN

9．ROD

14．（CONTROLVALVE）

5．BRACKET

lO．BELLCRANK

Fig．2．26 TransmissionControl −46−

▲Engineutral・StartSabtySystem ThetransmlSS10nCOntrOIsystemhasanenglneneutral・StartSafbtysystem．

Theneutral・StartSafbtysystempreventstheenginefrombeingstartedunlesstheshiftleveri neutral．Thispreventstheloaderfrommovlngabruptlywhenthestarterswitchisturnedon・

Makesuretheshiftleverisinneutralbefbrecrankingtheenglne． Operation

①whenthestarterswitchisturnedtoSTARTwiththeshiftleverinneutral，theneutralswitchisclose toallowanelectriccurrenttoflowthroughthestarterrelayandenerglZethestartermotor

S

，

Startingthestartermotor（engine）・

②whenthestarterswitchisturnedtoSTARTwiththeshiftlevernotinneutral，theneutralswit

remainsopen，SOthatnocurrentflowsthroughthestarterrelay・Consequently，theenglneWOnltstart・

STARTER RELAY

fromSTARTERSWIT

C 0 ＋ H C，， 。一1

toSTARTERMOTOR S toSAFETYRELAY

NEUTRAL

Fig．2．27 TransmissionControIElectricCircuitDiagram

一47−

S

2．4 0］LC］RCULAT10N ROUTE l．GeneralDescription

Theoilusedfbrthedriveunitissuppliedh・Omthetransmissionsumptank・ AstheenglneStartS，thecharglngPumPPicksupoilfromthetransmissionsumptankthroughthe StrainerandsendsitunderpressurethroughtheinlinefiltertothetransmissioncontroIvalve．ThecontroI

Valvedividestheoilintoonefortorqueconverteroperationandonefbrtransmissionclutchoperation・

Theoilsentintotheconverter，afterleavlngtheconverter，flowsintotheoilcoolertogetcooleddow

Af［erleavlngtheoilcooler，itlubricatesandcooIseachclutchshaftassembly，beforereturnlnglntO

transmissionsumptank． Note：Theoilcoolerisincorporatedinthelowertankoftheradiator．Referto

1．3COOLINGSYSTEM‖

fortheoilcooler． 9

4

1．TORQUECONVERTER

5．OILCOOLER

臥INLINEFILTER

2．DISTRIBUTORCAP

6．CHARGINGPUMP

9．BRAKEVALVE

3．TRANSMISSION

7．TRANSMISSION

4．STRAINER

CONTROLVALVE

Fig．2．28 0ilCirculationRoute −48−

2．InlineFilter

Theinlinefilterisprovidedinthesupplylineofthedriveunitoilcirculationroute・Theoi throughthenlterelementfromoutsidetoinsideandthefilteredoilisdirectedtothetransmissioncontrol valve．

Whentheoilnlterelementbecomesclogged，thepressureattheinletportsideincreasessothattheoil bypassesthecloggednlterelementandforcesopenthebypassvalvetoflowdirectlytotheoutletport Side．

Bypassvalveoperatingpressure：1・75kg／cm2（24・9psi）

2

1

SectionA−A

1．HEAD

3．FILJERELEMENTASSEMBIX

2．ELBOW

4．BYPASSVALVE

Fig．2．29InlineFilter −49−

2．5 PROPELLERSHAFTS CrossJOlnt

UniversaljolnttyPe Length（interpinlength）

Front

911．Omm（35．9in）

Rear

95．Omm（3．7in）

Weight Front

17．5kg（38．61bs）

Rear

10．Okg（22．01bs）

Thepropellershafts，locatedbetweenthetransmissionandthefrontaxleandbetweenthetransmission andtherearaxle，tranSmitthepowerfromthetransmissiontothe致・Ontandrearaxles．

Thepropellershaftsabsorbthechangeindriveangleandthechangeinlengthwiththelengthchange functionanduniversaljolntWhentheloadertravels，enSurlngSmOOthflowofpowerfromthetransmission totheaxles．

● FRONT AXLE

REAR AXLE

＼

＼＼＼−＿ J

、−＿＿／

Note：圧＞6：：：：：コ32kg−m（230ft−1bs）（16positions）

紹＝ゝThreadedarea：LOCTITE＃262

恒＞Flangearea：Removepaint，Oilorgrease

1．PROPELLERSHAFT（FRONT）

COmpletelyandassemble．

2．PROPELLERSHAFT（REAR）

Fig・2・30 PropellerShaftAssemblyInstallation

−50−

（Fromt）

1

●

3 4

2

5

6

1．FLANGEYOKE

4．SLEEVEYOKEASSEMBIJY

2．UNIVERSALJOINT

5．COVER

3．GREASEFITTING

6．GREASESEAL

（Rear）

1

2

3

1．FLANGEYOKE 2．UNIVERSALJOINT 3．H−YOKE

4．GREASEFITTING Fig．2．31PropellerShaft

ー51−

7．SHAFTYOKEASSEMBLY

2．6DRIVEAXLES（FRONTANDREAR） Driving Front axle Rear axle Reductiongearanddiffbrential

Frontandrearwheeldrive Frame−fixed，Semi−floatlngtyPe Cradle−PlnSuPPOrted，Semi−floatlngtyPe

Model

TCM632−30

lYpe

0rdinary，2−Stagereductiontype

Differential limiter

None

Weight Front

298kg（6571bs）

Rear

298kg（6571bs）

2．6．1DRrVEAXLE

Thedriveaxleconsistsofthedifftrential，aXleshaft，andwettypediskbrakeunit・

Thepowerfromthedriveunitistransmittedthroughthepropellersha鮎tothefrontandreardrive axles・Thepoweristhentransmittedthroughthedriveplnionandringgearwhereitturnsthedi飴rential case，tOthesidegearwhereitisdividedintotherightandleftaxleshafts，thusdrivingthewheels・

Note：Forthecradleinstallation，See一一Fig・5・4CenterHingePin・‖ 駐＞（忘＝コ52±10kg−m（380±70氏−1bs） 1．FRONTAXLE

4．REARFRAME

2．REARFRAME

5．CRADLE

3．REARAXLE

Fig・2・32 DriveAxlesAsse血bled −52−

2

●

● 3

N。te：B＞超＝ゝMatingsurface‥LOCTITEFMD−127 桓＞（芯＝コ10・3kg−m（74・5ft−1bs） B＞正＝ゝThreadedarea：LOCTITE＃262 B＞ぢ＝コ16．2kg−m（117ft−1bs） B＞6：＝＝コ2・6±0・5kg−m（18・8±3・6ft−1bs） 1．DIFFERENTIAL

5．AXLETUBE

9．LOCKPLATE

2．PLUG（DISKCHECKPORT）

6．BLEEDER

lO．DIFFERENTIALBODY

3．0ILSEAL

7．COVER

ll．PLUG（DRAIN）

4．AXLESHAFT

8．BREATHER

Fig．2．33 FrontAxle −53−

2

●

Note：圧＞14＝ゝMatingsurface：LOCTITEFMD−127 B＞

E：：：：コ10．3kg−m（74．5ft−1bs）

B＞正＝ゝThreadedarea：LOCTITE＃262 B＞（芯＝コ16．2kg−m（117ft−1bs） 匪＞ぢ：：：コ2・6±0・5kg−m（18・8±3・6糾bs） 1．DIFFERENTIAL

5．AXLETUBE

9．LOCKPLATE

2．PLUG（DISKCHECKPORT）

6．BLEEDER

lO．DIFFERENTIALBODY

3．0ILSEAL

7．COVER

ll．PLUG（DRAIN）

4．AXLESHAFT

8．BREATHER

Fig．2．34 RearAxle −54−

2．6．2 DIFFERENTIAL Thedifftrentialisintegralwiththereductiongear・

Thepowerfromthepropellershaftsistransmittedthroughthedriveplnionandtheringgeartothe

differentialgearcase・Itisthensentthroughtherightandleftsidegearstothefinalreducti assembly・Thespeedreductionofthepowerisaccomplishedbythedriveplnionandtheringgear・ ThedifFbrentialoperatesasn）1lows：

Whiletheloadertravelsstraight，theringgear，differentialgearcase，andsidegearsrotatetogether，

Withtheplniongearsinsidethedifftrentialgearcasenotrotatlng・Thepowerofthesamespeed

transmittedfromtherightandlef［sidegearsthroughtheaxleshaftstothewheels・Whentheloaderma aturn，therightandleftwheelsrotateatdifftrentspeeds；theplniongearsinthedifftrentialgear

rotatearoundtheirownaxesaccordingtothedifferenceinspeedbetweentherightandleftsidegears・

● While travelin

Whilemakingturns

1．PINIONGEAR 2．SIDEGEAR 3．AXLESHAFT 4．DIFFERENTIALGEARCASE 5．SPIDER 6．DRIVEPINION 7．RINGGEAR

Fig．2．35 DifftrentialGearOperation

−55−

●

1 2 3 4 5

●

6

●

●

Note：B＞6E：：：コ23kg−m（170ft−1bs），紹＝ゝthreadedarea‥LOCTITE＃262

医＞6＝：：：：：コ14．5kg−m（110ft−1bs），紹＝ゝthreadedarea：LOCTITE＃262 B＞ぢ：：：：：コ55kg−m（400ft−1bs），紹＝ゝthreadedarea：LOCTITE＃262 1．SIDEGEAR

8．SPACER

15．SPIDER

2．THRUSTⅥ「ASHER

9．BEARINGCAGE

16．DRIVEPINION

3．PLAINHALFCASE

lO．OUTERBEARING

17．SHIM

4．BEARING

ll．RINGGEAR

18．0ILSEAL

5．ADJUSTINGNUT

12．FLANGEHALFCASE

19．0ILSEALRETAINE

6．PILOTBEARING

13．THRUSTWASHER

20．COMPANIONFLANGE

7．INNERBEARING

14．PINIONGEAR

Fig．2．36 Differential −56−

2．7WHEELASSEMBLY（TIREANDWHEEL） Tire

17．5／65x20−10PR，Tubeless，L−2

Wheel（rim）

W14Lx20

Wtight（perpiece） Tire

68kg（1501bs）

Rim

39kg（861bs）

Inflationpressure

1．8kg／cm2（25．6psi）

2．7．1TIRE

ThestandardmodelisprovidedwithtypeL−2tireswhichftaturehightraction．Selectapproprlatet

Sincethereareavarietyoftiresavailableaccordingtotheapplicationandpurposeofwork．

Thetiresizeisexpressedininches・Thestrengthoftiresareexpressedinplyrating（PR）：forexample， 10PRmeansastrengthcorrespondingtothatoflOpiecesofcottoncords．（PRdoesnotnecessari fbrthenumberofcordpliesinthetire．）

Example：

X 芋 −

」竿 ？／竿 Tirewidth（in）Flatnessratio Rimdiameter（in）Tirestrength 2．7．2 WHEEL Thewheelconsistsoftherimanddisk．Thediskisboltedtotheaxleshaft．

ThetireisinstalledontherimandbothserveasonepleCe．ItisthusverylmPOrtanttOuSean

approprlaterimwheninstallingatireontherim・Theuseofaninapproprlaterimmayresultinashortlif

Ofthetireandintheworstcasemightleadtoaseriousaccident．Therimsizeisalsoexpressedininches・

Thefirstnumberstandsfortherimwidthandthenextonetherimdiameter．

−57−

（Tire）

1．TIRE 2．VAI一VE

（TteadPattern）

（Rim）

1．RIM 2．VALVEGUARD 3．DISK

Note：B＞ぢ：：：：：コWheelbolttorque：84−92kg−m（610−670ft−1bs）

Fig・2・37 TireandRimAssembly

−58−

3．BRAKESYSTEM Servicebrake T〉11e

Frontandrearwheelindividualbraking；Wetdisk hydraulicservoassistedbrake

Numberoffluidlines

2 lines

Brakevalve

Tandembrakevalve

Diskbrake

4−Wheelswettypediskbrake

Brakepump

DoubledutyasacharglngPumPl）

Oiltank

0．28ゼ（0．074gal）

Pressuresettlng AlarmSyStem Safety system

65kg／cm2（920psi）

Parkingbrake

Type

Transmissionreduction−Shaftbraking，diskbrakewith spring cylinder

Installation

Inside transmission

Note：1）Forthebrakepumpspecificationsandconstruction，See

6・2PUMRl一

▲D。n。tSh。t。frtheenginewhilethel。ade，is．。nning．Iftheenginestallswhilethel runnlng，thebrakepedalbecomeshardtoreducebrakingforce・

ー59−

●

● ▲′

Fig．3．1BrakeSystem −60−

3，1SERVICEBRAKE 3．1．1GENERALDESCR［PTION（BrakeLine）

（1）Servicebrakeline Theservicebrakelineisa4−Wheelwettypediskbrakeandusesthehydraulicservoassistedbrake SyStem・

Thehydraulicbrakelinehasanindependent2−1inesystemforfrontandrearwheels・Ifoneoftwolin

isdamaged，anOtherlinewilloperateproperlytobraketheloader・However，thebrakingforcedecre

andthepedalstrokebecomeslongerthanusualinsuchacase・ （2）Safbtysystemandalarmsystem ・Abrakevalve（OilLOVerbooster）isinstalledasasafetydevicefortheservicebrakeline．

Ifthepumpstopsforsomereason，thebrakingforcecanbeproducedbypresslngthebrakepedal fbrcibly・Theproducedbrakingforceisinproportiontoitspresslngforce・ However，thepedalismuchhardertopressthanusualtolowerthebrakingforce・

● A。。n。．Sh。．。ff．heenginewhi．ethel。aderisr。nning．

・Alevelswitchisbuiltinthebrakeoiltank．Ifthebrakeoildropsbelowthespecinedlevel，thebr

OillevelwarnlnglampglVeSanalarmtotheoperator・

●

ー61−

⑪ toTRANSMISSIONCONTROLWE

㊦toTRANSMISSIONSUMPTANKFILLERTUBE（DRAIN） Note：Specincationsandapplicationsofswitches Position

Name

Application

Specification

A

Stop lamp switch Stop lamp

OFFwhenpushrodispushed ONwhenpushrodisreleased

B

‖Brakeoillevel一一 Level switch （builtinoiltank） Warnlnglamp

ONwhenbelowstandardlevel

C

Pressureswitch Inchingoperation

35kg／cm2（450psi）：OFF 25kg／cm2（360psi）：ON （TurnsONatatmosphericpressure）

（Inchingswitch）

1．BRAKEPEDAL

4．TRANSMISSIONSUMPTANK

7．BRAKEOILTANK

2．BELLCRANK

5．CHARGINGPUMP

8．WETTYPEDISKBRAKE

3．BRAKEVALVE

6．TRANSMISSIONINLINEFILTER

Fig．3．2 ServiceBrakeLine −62−

（builtinAXLE）

T／C

﹁． − ． ﹂

l．TRANSMISSION

6．BRAKEVALVE

12．SPRINGCHAMBER

2．STRAINER

7．BRAKEOILTANK

13．PARKINGBRAKE

3．CHARGINGPUMP

8．PRESSURESWITCH

14．TRANSMISSION

4．TRANSMISSION

9．DISKBRAKE（FRONT）

INLINEFIIJER 5．BRAKEPEDAL

10．DISKBRAKE（REAR）

11．STOPVALVE Fig．3．3 BrakeOilPressureCircuitDiagram −63−

CONTROLVALVE

（3）Inchingmechanism

Theinchingmechanism，interlockedtothebrakesystem，StOPStranSmissionpowertemporaril

Placlngthetransmissioninneutral．

Whentheinchingmechanismisactivated，thedrivlngPOWerisconcentratedontheload−handli SyStem・

・Whenthebrakeisapplied，theinchingswitchisturnedofftoconnectthepowersupplytotheinching SOlenoidinthetransmission，thusputtlngthetransmissioninneutral．

●Theloaderisequippedwithaclutchcut−Offswitch（inchingselectswitch）intheoperator s COmPartment・Theinchingmechanism（Clutchcut−Off）isturnedonoroffbyoperatingtheswitch． a．Loadhandlingwithclutchcut・0ffswitch一 Thel

OFF

clutchcut−0ff‖indicatorlampISOut，indicatlngthattheinchingmechanismisinactivation．

Whenthebrakepedalispressed，thebrakeisappliedandtheinchingswitchisturnedofftoputthe

transmissioninneutral．Whenthebrakepedalisreleased，theinchingswitchisturnedontolinkthe

transmissionlineagaln．

b．Startingofronanincline，withclutchcut−Ofrswitch一 ON一一

Thel■clutchcut−0ff‖indicatorlampISOn，indicatlngtheinchingmechanismisnotworking・The

POWerSuPPlytotheinchingsolenoidofthetransmissionissuppliedthroughtheclutchcut−0ffswitch

regardlessoftheinchingswitchoperation・Therefore，Whenthebrakepedalispressed，th transmissionwon

tshiftintoneural．

Note：Thisdiagramshowsacircuitwiththeservicebrakeandtheparkingbrakereleased． Fig．3．4InchingCircuitDiagram −64−

Operatiom （l）Brakepedalinneutral

①whenthebrakepedal（1）isinreleasedstate，thebrakevalve（3）isnotinoperation． Theoildischargedfromthechargingpump（5）flowsintothebrakevalveinletport．

Thepressurizedoilflows，PaSSlngthroughthebrake valvepowercylinder，Outletportan transmissioninlinenlter（6），tOthetransmissioncontroIvalve．

②Thebrakeoilpressurelineofthediskbrake（8）1eadsthroughthebrakevalvemastercylinde brakeoiltank（7）． Therefbre，thediskbrakeisinreleasedstate．

Fig．3．5 BrakePedalinNeutral

−65−

（2）Brakepedalinoperation ①whenthebrakepedal（1）ispressed，thepushrodofthebrakevalve（3）ispushedthroughthe bellcranktoactuatethevalve．

②Insidethepowercylinderofthebrakevalve，thepressurizedoilfromthepumpmovesthep plStOnandtheresidualpressurizedoilissenttothetransmlSSioncontroIvalve．

③Insidethemastercylinderofthebrakevalve，thesecondaryandprimarypistonsaremovedtosen thepressurizedoiltothediskbrake（8）toapplythediskbrake

Fig・3・6 Whenbrakepedalispressed．

（3）Brakepedalinreleasestate Whenthebrakepedalisreleased，thebrakevalve（3）returnstotheneutralposition．

Thebrakeoilwhichhasoperatedthediskbrake（8）flowsthroughthemastercylinderofthebrak Valvetothebrakeoiltank（7）． Thebrakeoilpressureisremovedandthediskbrakeisreleased．

ー66−

3．1．2 BRAKEVALVE

Thebrakevalve（Oil−OVerbooster）isahydraulictypebrakeboosterwhichbooststheoilpressure

mastercylinderinproportiontotheamountofbrakepedaleffort，uSlngtheoilpressuredischargedfrom theoilpumpasaboostlngSOurCe・

Thebrakevalveconsistsoftheboosterbody（POWerCylinder）andthetandemtypemastercyli TheboosterthrottlesthevariableorificewiththespooIwhichisoperatedthroughlinkagebythebrake

Pedal，tOaPPlyboostedoilpressuretothepowerpIStOnOfthebooster，thusoperatlngthetand

mastercylinder． ThebrakingforcecanbehnelycontrolledbecausethepedalstrokefollowsthepIStOnStrOkeofthe tandemtypemastercylinderandthebrakeoilpressureproducedatthetandemtypemaSterCylinderisftd backbythereactionpIStOnWithsmalldiameter・

Ifthepumpstopsforsomereason，thepresslngforceofthebrakepedalcandirectlyactuatethetandem typemastercylinderthroughthespooIsothatthebrakingforceinproportiontothepresslngfbrcecanbe acquired．（Failsaftmechanism）

Note：距＞ぢ＝コ3・0−3・5kg−m（22−25糾bs） 匪＞6：＝＝］2・5−3・8kg−m（18−27ft−1bs） View100kingfromZ

1．INLETPORT

4．TANKPORT

2．OUTLETPORT

5．BRAKEPORT（2pcs．）

3．DRAINPORT Fig．3．7 BrakeValve −67−

（POWERCYLINDER）

8 9 10 11 12 133

7

（MASTERCYLINDER） 18

19 20

21

22 23

24 25

26

1．JOINT

10．SPRING

19．SECONDARYPISTON

2．PUSHROD

ll．CONNECTOR

20．CONNECTOR

3．DUSTCOVE

12．SPRING

21．PRIMARYPISTON

4．SPOOL

13．ROD

22．CUP

5．OILSEAL

14．RELIEFVALVE

23．SPRING

6．BODY

15．SPRING

24．STOPPER

7．CYLINDERCOVE

16．PLUG

25．CUP

8．POWモRPISTON

17．SETSCREW

26．SPRING

9．SPRING

18．BODY

Fig．3．8 ConstruCtionofBrakeValve −68一

Operation （l）Brakeinreleasestate

①whenthepushrodtobeconnectedtothebrakepedalisbackoff，theassemblyofthespool（1） theconnector（5），andthepowerpiston（4）arereturnedtothecylindercover（3）side・

②Therefore，theprmarypiston（7）andsecondarypiston（6）ofthemastercylinderareattheirspe

POSitionsrespectlVely，andthepressurechambers（D，C）（thechamberstothebrakeport）are totheoiltankthroughthereliefport・ （2）Brakeinoperation

①Thepressureoilfromtheoilpumpflowsfromtheinletportofthepowercylinderintothe

Chami）er（A）ofthepowerpiston（4）．Itthenflowsthroughthethrottlepassageformedbetwee

SPOOl（1）andthepowerpiston（4），andtheforwardchamber（B）ofthepowerpiston（4），tOtheoutle port・

②whenthebrakepedalispressed，thespool（1）throughthepushrodconnectingtothepedaladvances

tothrottlethepassagebetweenthepowerpiston（4）andthespool（1）・Then，thedifferentialpressur isproducedbetweentheforwardandrearchambers（A，B）ofthepowerpiston（4），andthepower Piston（4）advancestopresstheconnector（5），thuscausingtheconnector（5）tooperatetheseconda Piston（6）ofthemastercylinder・

1．SPOOL

4．POWERPISTON

2．RELIEFVAINE

5．CONNECTOR

3．CYLINDERCOVER

6．SECONDARYPISTON

Fig．3．9 BrakeValveOperation −69−

7．PRIMARYPISTON

③whenthesecondarypiston（6）advancestoproduceapressureinthepressurechamber（C），th

PreSSureisalsoappliedtothereactionchamberbuiltinthesecondarypIStOn・Therefbre，thereacti Piston（Pistonwithsmalldiameter）retreatstotouchthespool（1）end，SOthatthepressureproduced

bythemastercylinderistransmittedthroughthepushrodtothepedalasareactionforcefor OPeration・

④Thepressure ．

theprimarypistonside．Thepressureproducedinthepressurechambers（C，D）flowsffomthebrake

POrttOPrOducebrakingforce・

⑤ThepowercylinderoilpreSureisregulatedbythereliefvalve（2）whosesettingisdetermined accordingtothepressuresettlngOfthemastercylinder・ （3）Sa鮎tydevice

①Ifthehydrauliccircuitatthepowercylindersidefailstooperatenormally，itispossibletooperatet

mastercylinderpistondirectlybypressingthebrakepedalthroughthespool（1）andtheconnector （5）．

②Themastercylinderisatandemtype．Evenifoneofthe丘ontandrearbrakelinesisdeftctivedue OilleakagefromthepIPlngOrforanyotherreason，theotherlineoperatesproperlytobrakethe loader．

（4）Brakevalveinreleasestate ①whenthepedalisreleased，thethrottledpassagebetweenthespool（1）andthepowerpiston（4）are

releasedandthepowerpiston（4）andtheconnector（5）arereturnedtothecylindercover（3）side・

②Theprimarypiston（7）andsecondarypiston（6）ofthemastercylinderarealsobackofftotherelease

POSitionandthepressurechami）erS（CandD）arerespectivelyopenedtotheoiltankthroughthe reliefportwiththepressureineachchambertoweredtotheatmosphere・

−70−

3．1．3 DISKBRAKE

Thediskbrakeisawetmulti−Platediskbrakeandbuiltinthedifftrentialbodyofthedriveax thisloader，fourdiskbrakeunitsareinsta11edonthe4wheels，Oneforeach． FortheconstruCtionofthediskbrake，referto

2．6DRIVEAXLE

．

Operation Whenthebrakepedalispressed，thebrakeoilpressureactsonthebackofthebrakepIStOnandlocks upthebrakediskwiththebrakering・

Theinnerperipheryofthebrakediskissplinedtotheaxleshaftthroughthediskhub・Theoute PeripheriesofthebrakeringaresecuredtotheaxletubebyplnS，SOthatthebrakedisklockedupwiththe brakeringstopsrotatlngtObraketheloader・

Whenthebrakeoilpressureisreleased，thebrakepIStOnreturnSalittlebytherestorlngforceofthe 一一0．一−rings，tOPrOduceaclearancebetweenthebrakediskandthebrakering，thusmakingthebrakedisk free．

l．AXLESHAFT

4．BRAKEDISK

7．‖0■−一RING

2．DISKHUB

5．BRAKERING

8．PIN

3．BRAKEPISTON

6．‖0‖−RING

Fig．3．10 DiskBrakeOperation −71−

3．1．4 BRAKEOILTANK Thebrakeoiltankisinsta11edtosupplybrakeoiltothemastercylinderofthebrakevalve．

Thebrakeoilisusedtooperatethediskbrake． Oiltobeused：EnglneOil，SAE5W−20

Capaclty：

1・O e（0・26gal）（totalcapacity），0．28e（0．078gal）（reservoir）

▲usethespecinedoilforthebrakesyste㌣・Useofgeneralautomobilebrakefluidmi

damagetherubberpartsinthebrakeline†CauSlngthemalfunctionofthebrakesystem！reSulting anaccident．

Besuretousethemineral・tyPebrakefluidfbrthebrakesystemofthisloader」

● Note：MAX．283cc（0．079gal）

MIN．150cc（0．042gal） 1．CAP 2．STRAINER 3．BRACKET 4．LEVELSWITCHASSEMBLY Unit：mm（in）

Fig．3．11BrakeOilTank

ー72−

3．2 PARKING BRAKE 3．2．1GENERALDESCRIPT10N（BRAKELINE） Theparkingbrakeisadrydiskbrakeandinstalledontheidlersha氏ofthetfansmission．

Theparkingbrakeisoperatedwiththeparkingbrakeknobintheoperator■scompartment・ ThehydraulicoilforthedriveunitisalsousedasthepressurizedoiloperatlngthesprlngChamber． ThepressurizedoildischargedfromthecharglngPumP flows throughtheinline filtertothe transmissioncontroIvalve．ThenlPPleatthecontroIvalveinletdividestheoilintoonefbrstopvalve

Note：Specincationsandapplicationsofswitches Position

Pressureswitch E

Application

Specification

Transmissionclutchcut−0ffand

4kg／cm2（57psi）：OFF 3kg／cm2（43psi）：ON （TurnsONatatmosphericpressure）

Name

（Parkingswitch） l−Parkingbrake−1indicatorlamp

1．PARKINGBRAKEKNOB

4．TRANSMISSIONCONTROLVALVE

2．CABLE

5．SPRINGCHAMBER

3．STOPVALVE

6．PULL−CABLE

（PARKINGBRAKEVALVE）

7．DISKBRAKE

Fig．3．12 ParkingBrakeLine −73−

Operation

●

nob（l）ispTeSSed，thepressurizedoilfromthebr止evalvefl。WSthr。。gh theparkingbrakevalve（3）intothesprlngChamber（5）．

②Thepressurizedoilwhichhasenteredthespringchamber（5）operatesthepistontoreleasethedisk brake（7）throughthepull−Cable（6）．

Fig. 3.13 Releasing Parking Brake

（2）Applyingparkingbrake

①whentheparkingbrakeknob（1）ispulled，theoilprSSurefromthebrakevalveisblockedinthe Parkingbrakevalve（3）・ThepressurizedoilinthesprlngChamber（5）passesthroughthestopvalve （3）andisdrainedintothetorqueconverter．

②Thepistoninthespringchamber（5）isreturnedbythespringtoactuatethediskbrake（7）throughth Pull−Cable（6），

Fig・3・14 0peratlngParkingBrake −74−

（3）Transmissionclutchcut・Ofr a．Whenparkingbrakeisactuated：

①whentheparkingbrakeisactuated，theoilpressureactingonthespringchad）erisdrained・

pressureswitch（Parkingswitch）installedonthesprlngChamberpipingturnsonandtheparkingr is changed over.

②Thepowersupplytotheinchingsolenoidofthetransmissionisconnectedsothatthetransmiss Putinneutral．（transmissionclutchcut−Off）

③The‖parkingbrake‖indicatorlampcircuitisclosedandthelampcomeson・

Note：Thisdiagramshowsacircuitwiththeservicebrakereleasedandtheparkingbrakeactuated・ Fig．3．15 ElectricCircuitDiagram

b．Whenparkingbrakeisreleased：

①whentheparkingbrakeisreleased，theoilpressureisbroducedtoactonthespringchamber・ parkingswitchisturnedoffandtheparkingrelayreturnstotheorlglnalcondition・

②Thepowersupplytotheinchingsolenoidofthetransmissioniscutofftomakeitpossibletosh transmission． The

parkingbrakel

indicatorlampgoesout・

−75−

3・2・2STOPVALVE（PARKINGBRAKEVALVE） TheparkingbrakevalvecontroIsthesupplyofpressurizedoiltothesprlngChamber・

Theparkingbrakeknobswitches・overtheparkingbrakevalveandcontroIsthesprlngChamberto actuatethediskbrake・TheparkingbrakevalvehasdetentmechanismstoholdeachspooIposition・

‖

口

u

」

＿＿

8 9

1．SPOOL 2．VALVEHOUSING 3．SEALPLATE 4．COLLAR 5，− 0 −RING

6．CAP

肝l藍l眉†・妻与

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

Fig・3・1 StopValve

−7（ト

●

3．2．3 SPRINGCHAMBER

ThesprlngChamberincorporatesastrongsprlngWhoseforceappliesthebrakemechanically・ Thepull−CableisinstalledonthepIStOninthesprlngChamber・Thecableislinkedtotheleverofth brakecalipersothattheparkingbrakeiscontro11edbyswitchingoverthepressurizedoilsuppliedintothe SPrlngChamber・

Operation

①whenthepressurizedoilissuppliedintothespringchamber，thepistonshiftstopushthepull−Cab thusreleaslngtheparkingbrake・

②whenthepressurizedoilsuppliedintothespringchamberisdrained，thepistonispushedbackbythe SPrlngtOPullthepulトcable，thusactuatlngtheparkingbrake・

N。t。‥

臣＞（芯＝コ1・52−2・26kg−m （10．1−16．3氏−1bs），

超＝ゝthreadedarea： LOCTITE＃262

恒＞6：：：：：：コ1．54−2．30kg−m （11．1−16．6ft−1bs）

1．HOUSINGASSEMBLY 2．PISTON 3．PACKING 4． −0 −−RING

5．OUTERSPRING 6．INNERSPRING 7．TUBE 8．PLATE 9．PULL−CABLE

Fig．3．17 SpringChamberAssembly −77−

3．2．4 D［SKBRAKE Thediskbrakeisamechanical，drytypediskbrake・

Thediskbrakeisinstalledonthebrakeflange（rotationarea）ofthetransmissionidlershaft．Thebr Caliperissecuredtothebrakecarrier（non−rOtationarea）installedonthetransmissioncase．

Operation

①whenthebrakecaliperleverispulledup，thepadcarriersonthebothsidesshift，uSingthepivotseat PlnaSafu1crum・Then，thepadsclampthebrakedisktoactuatethebrake．

②whentheleveris ．

Note：Theelasticplasticcharacteristicsoftheretractionplateisusedtoadjusttheclearancebetweenthe Padsandbrakediskautomatica11y・

1．（BRAKEDISK）

6．PADCARRIERBOIJ

11．SELF−LOCKNUT

2．HANDBRAKEBOIJ

7．TUBWASHER

12．RETURNSPRING

3．OUTERPADCARRIER

8．TRANION

13．INNERPADCARRIER

4．PADASSEMBLY

9．PIVOTSEAT

5．RETRACTIONPLATE

lO．LEVER

Fig・3・18 BrakeCaliper

−78−

4．STEER［NGSYSTEM Type

Frame−articulatlng

Mechanism

Orbitro1

Framearticulatlngangle

400torightandleft

No．ofrotationsofsteerlngWheel

left：5．3 right‥3・8

Powersteerlng Name

Orbitrol，LEHTID

Type Pressure setting

Separate 175kg／cm2（2490psi）

Usedalsoasmainpump‖

Steering pump SteerlngCylinder

Double−aCtlngPIStOn

Type

1

q●l〉●

Cylinderstroke

290mm（11．4in）

Weight（PerPiece）

16kg（35．31bs）

Note：1）Forthespecincationsandconstructionofthemainpump，referto‖6・2PUMP・‖

4．1GENERALDESCRIPTLON ThesteerlngSyStemisaframe−articulatlngtyPeWhichsteerstheloaderbyoperatlngthesteerlng cylinderbetweenthefrontandrearframes・

toMAINCrRCUJT

Fig．4．10rbitroITypeSteeringSystem −79−

Itusesanorbitrol（fu1l−hydraulicpowersteering）whichdoesnotuseanylinkagemechanismb operatesonhydraulicpoweralone・

ThesteerlngSyStemCOnSistsofthesteerlngWheelunit，Orbitrol，PrlOrltyValve，SteerlngCylinders，and tubing・

▲Ifthepresヲurizedoilisnotsuppliedfromthepumpwiththeengineatrest，theorbitrolactsas

amanualsteerlngSyStem？thusmakingitpossibletosteertheloader・Eowever，nOtethatt steeringoperationisconsiderablyharderthanusual・

Note：Theabovesketchdoesnotillustratethetubing・ Forthetubing，reftrto‖6・HYDRAULICSYSTEM・‖

Fig．4．2 SteeringSystem −80−

4．2 0）LC［RCULATJON ROUTES TheoilpickedupfromtheoiltankbythemainpumpISSentunderpressuretotheprlOrltyValvewhere itisdividedintotwoportions：Oneforthemainhydrauliccircuitandoneforthesteerlnghydrauliccircuit． ThesteerlnghydrauliccircuitusestheloadsenslngSyStemSOthattheorbitrolreceivesthenecessary

amountofoilfromtheprlOrltyValve，Withtheresidualamountofoilbeingsenttothemaincircuit，Whe

thesteerlngWheelisturned，theoilis sentintothesteerlngCylinderforsteerlngtheloader．Theoi dischargedfromthesteerlngCylinderreturnsintotheorbitrolfromwhichitreturnSintotheoiltank． Note：FortheoperationoftheloadsenslngSyStem，referto 4．5PRIORITYVALVE．‖ Fortherestrictionvalve，refertol 4．4STEERINGVALVE（ORBITROL）．‖

Fig．4．3 HydraulicCircuitDiagram −81−

4．3 STEER］NGWHEELUNIT

Thesteeringwheelunitisinstalledinthecockpit・Belowitisthesteeringvalve（Orbitrol）．Whent

SteerlngWheelisturned，therotationistransmittedthroughthesteerlngShaftwhichinturnaCtuateSthe orbitrol．

〕 I ／

1

9 8 0 1

1 1

AssembIedview

Note：B＞紹＝ゝBushing：Syntheticrubberadhesive ConstructionofSteeringWheelUnit

B＞l⊂＝恥Bearing：greaSe R＞疋＝ゝGrommet：Water−PrOOfseal

B＞ぢ：：：コ3．5−4．1kg−m（25．3−29．6R−1bs） 匝＞l⊂＝恥Splineandwasher：mOlybdenumgrease

1．STEERINGWHEEL

5．BEARING

9．BRACKET

2，STEERINGSHAFT

6．GROMMET

lO．SOUND−ABSORBINGMAT

3．WASHER

7．COLUMN

ll．STEERINGVÅLVE（ORBITROL）

4．BUSHING

8．MOUNTRUBBER

Fig．4．4 SteerlngWheelUnit −82−

4．4STEER）NGVALVE（ORBITROL） TheotbitroIconsistsofthecontroIvalveandtherotorset．ThecontroIvalveisarotaryvalvewhich

changesthealignmentofoilpassagesbyrotatlngltSelf，thusactuatlngthesteerlngCylinders・Ther

islocatedunderthecontroIvalve・Usuallyitactsasanoilmotortoperformmeterlngfunctions emergency，1tisusedasahandpumpandactsasamanualsteerlngunit・

R

L

● T しS P （Circujtdiagram）

●

L，R：CYLINDERPORT

P ：PUMPPORT T ：TANKPORT LS：LOADSENSINGPORT

● V始wbok如gfmZ

Note：B＞（芯＝コ2．4kg−m（17f［−1bs）

Fig．4．5 0rbitrol −83−

●

SectionA−A

1．ENDCAP

9．NEEDLEBEARING

17．BALL

2．SPACER

lO．OILSEAL

18．CHECKVAINEBODY

3．SPACERPLATE

ll．SEALGRANDBUSHING

19．CHECKVALVEPOPPET

4．DRIVE

12．DUSTSEAL

20．GUIDE

5．HOUSING

13．RETAININGRING

21．SPRING

6．SPOOL

14．● 0 ■−RING

22．ADAPTERSCREW

7．SLEEVE

15．FLATSPRING

23．GEROTOR

8．PIN

16．CENTERINGSPRING

Fig．4．6 ConstruCtionofOrbitrol −84−

Orbitrol Operation （1）Steeringwheelinneutral

TheoilfromthePportflowsintothecavitybetween

thespool（2）anddrive shaft（3）throughthesma1l OPeningsofthesleeve（1）andthespool（2）・Theoilin

thecavltyflowsoutfromtheTportthroughtheupper PartOfthedriveshaftandnotchgrooveofthespooland Sleeve．TheRandLports（Cylinderports）areClosedby

thespool．

Fig．4．7NeutralState

（2）Thrningsteeringwheelcounterclockwise

WhenthesteerlngWheelisturnedcounterclockwise， thespool（2）isrotatedwithrespecttothesleeve（l）to Closetheneutralflowpassage（Smallopenings）・Theoil

fromthePportpassesthroughthechangedoversleeve OPenlngS，SPOOlgrooveandsleeveopenlngSandissentto therotorset sectionthroughtheoilpassage ofthe housing（4）torotatetherotor（5）・

Theoildischargedbyrotationoftherotorissentto

thecontroIvalvesectionandthenflowsfromtheLport

intothesteerlngCylinderthroughthesleeveandspool・ TheoildischargedfromthesteerlngCylinderreturnsto theRportandflowsoutfromtheTportthroughthe Sleeveandspool．

Fig．4．8CounterclockwiseRotation

Note：Whentherotorrotates，the drive shaft andthe

Sleeverotatetogether． Namely，ifthesteerlngWheelisturnedtorotate the spool，the sleeveisalsorotatedequally， therebynullifyingspooldisplacement・

Consequently，therotorisrotatedcorresponding totherotationangleofthesteerlngWheel，andthe Oildisplacedbytherotorissenttothesteerlng Cylinder・InactualsteerlngthefollowlngmOtion

Of rotor to steering wheelis executed COntinuously．

Fig．4．9RotorSetSectioninOperation ー85−

（3）TtLrningsteeringwheelclockwise WhenthesteerlngWheelisturnedclockwise，therotor rotatesinadirectionoppositetowhenthesteerlngWheel

isturnedcounterclockwise，therebyinvertlngOilintake anddischargebytherotor． TheoilflowsfromtheRportintothesteering Cylinders，andtheoildischargedfromthesteering CylindersreturnstotheLport・

l

【

Fig．4．10 ClockwiseRotation （4）Emergencyoperation Whenthehydraulicoilisnotsuppliedfromthepump duetoenglneStOP，theorbitroIservesasanemergency Steerlngunit・WhenthesteerlngWheelisturned，rOtation

istransmittedtothedriveshaft（3）andtherotor（5） throughthespool（2）andcrosspin（6）．Therotor，Put intorotation，drawsinoil・Negativepressureiscreatedin theoilpassage，SOthatthecheckvalve（7）isopenedto

drawinoilfromtheTport． Theoildischargedfromtherotorissenttothesteerlng Cylinderthroughthecylinderporttosteertheloader．The Oildischargedfromthe steeringcylinderreturns to anothercylinderportandisdrawnintotherotorthrough

thecheckvalve（7）． Note：Incaseofemergencyoperation，thesteerlngWheel ishardertoturnthaninnormaloperation・

−86−

Fig・4・11EmergencyOperation （ClockwiseRotation）

（5）Operationofcenteringspring

WhenthesteerlngWheelisturned，thecenterlngSPrlngisdeformed，COrreSPOndingtotheclearanc

betweenthecrossplnandspool・WhenthesteerlngWheelisreleasedorlocked，thesleeveisrot

tensionofthecenterlngSPrlng，andrestorestheneutralposition・Inthisstate，turn1nglSCOntinuedatthe glVenturnlngangleuntilthesteerlngWheelisturnedagaln・Thus，thedeformationrecoveryo CenterlngSPrlngaCtSaSfeedbackofthesteerlngmeChanism・

（6）Pportcheckvalve AcheckvalveisbuiltinthePportoftheorbitrol・

Thischeckvalvefunctionsasfollows．

WhenthesteerlngWheelisturnedclockwise，andthesteerlngCylindersreachitsstrokeend， PreSSureattheRportsideoftheorbitrolisincreasedtothereliefsettlngPreSSure・

Ifinthisstate，thesteerlngWheelisreleased，thewholesystemrestorestheneutralstate・Buth

PreSSureOilmayremainintheRport，Sincethecylinderportsideisblocked・ Afterthat，WhenthesteerlngWheelisslowlyturnedclockwise，namelyinthesamedirection

mentionedabove，theRportoforbitrolisconnectedtothePportthroughtherotor・Ther immediatelyrotatedbyresidualpressureinthePport，SOthatoilflowsbacktothePport・

AstherotorismechanicallyconnectedtothesteerlngWheelthroughtheinternalpartsoftheorbitrol，

thehandwheeltendstoberotatedinreversedirection（COunterClockwise），OPPOSitetosteeringdir （Clockwise）．ThecheckvalveisbuiltinthePportoftheorbitroltopreventsuchareverseturn・

−87−

（7）Restrictionvalveconnector TherestrictionvalveconnectorisusedfortheRportoftheorbitrol・

Duetotheuseofaone−Siderodcylinder，OVerrunnlngloadcausesthetravelinglnaZlgZaglineofthe loader・Tbcopewiththisproblem，Wetakethefo1lowlngmeaSureS：Installtherestrictionvalveinthel attherodsideofthecylinder・Then，thebackpressureisapplied，Whichpreventsthecylinderfr

overrunnlngSOthatthecavitationatthecylinderbottomisrestricted，thusavoidingtheimpropertraveling oftheloaderduetocavitation．

Note：Overrunnlngloadandloader stravelinglnaZigzagline Overrunnlngloadmeanstheforcethecylinderisshiftedbyinertiaforcetothesamedirectionas

thesteerlngWheelissteered・Ifsuchforceisappliedtotheone−Siderodcylinder，CaVitationma

beproducedatthecylinderbottom・Then，thecylinderbecomesunstablebythecavitationw thenextsteerlnglStObecarriedout，thuscauslngtheimpropertravelingoftheloader・

1．‖0 ■−RING

2．POPPET 3∴BODY

4．SPRING 5．SPACER

4 5

Fig．4．12 RestrictionValveConnector

−88一

4．5 PR】ORITYVALVE TheprlOrltyValvecombineswiththeorbitroltoformtheloadsenslngSyStemWhichdistributestheoil

dischargedfromthemainpumptoboththesteerlngandhydraulicsystems・TheprlOrltyValveisp Withareliefvalveforthesteerlnghydrauliccircuit．

芸」

匡＞111213＜＝司 SectionA−A

Note：D＞ぢ＝コ2・1kg−m（15ft−1bs） 医＞ぢ：：：：：：コ2・5kg−m（1紺−1bs）

● p T

PUMPPORT（fromMAINPUMP） TANKPORT（toOILTANK）

LS EF

LOADSENSINGPORT（fromORBITROL） MAINCIRCUITPORT（toCONTROLVÅLVE）

CF

STEERINGCIRCUITPORT（toORBITROL）

P

（Circuitdiagram）

1．HOUSING

5．BALL

10．PLUG

2．SPOOL

6．BALLHOLDER

ll．BODY

3．SPRING

7．SPRING

12．FILTER

8．ADJUSTMENTSCREW

13．PLUG（ORIFICE，0．8mmor

4−9．RELIEFVÅLVE

4．SCREEN

9．BODY

O．0315in．dia．）

Fig．4．13 PriorltyValve −89−

LoadSensingSystemOperation

Theloadsensingsystemletsonlytheamountofoil（OutOftheoildischargedfromthemainpump） necessaryforsteerlngOPerationtoflowintotheorbitroIwhilelettlngalltheremainlngOilflowintothe loadhandlingsystem（COntrOIvalve）．

Forexample，WhenthesteerlngWheelisinneutral，mOStOftheoildischargedfromthemainpumpl directedintothecontroIvalvefortheoperationoftheloadhandlingsystem，SOthattheoildischarged

fromthemainpumpISe疏cientlyusedtoachieveamoreenergy−SaVlnghydraulicsystemdesign・ （1）Steeringwheelinneutral（engineatrest）

Whiletheengineisatrest，thespool（l）ofthepriorityvalveiskepttotheleftinthefigureduetothe COntrOIspring（2），WiththeCFportfu11yopenandtheEFportfu11yclosed．

Fig．4．14 SteeringWheelinNeutral（EngineatRest） −90−

（2）Steeringwheelinneural（enginerunning）

①Thepressurizedoilfromthemainpumpflows，PaSSingthroughthePportandCFportoftheprior valve，OrificeCooftheorbitrol，andTport，backintotheoiltank・

②Inthiscondition，thepressuredifftrentialacrosstheorinceCoinsidetheofbitrolisalsocreate PreSSureChambers（A，B）ofthepriorityvalve，thusshiftthespool（1）totherightinthengure・

③consequently，theEFportofthepriorityvalveisfu11yopened，WhiletheCFportisslightlyopened

MostoftheoildischargedfromthemainpumpISrOutedtothecontroIvalvetooperatetheload handlingsystem．

●

Fig．4．15 SteeringWheelinNeutral（EngineRunning） −91−

（3）Whensteeringwheelisinrotation

①whenthesteeringwheelisturnedclockwise，theoilpassagesintheorbitrolareswitched′。Vert。1e

theoilflowthroughthePportandtheorinceCl・ ②Atthistime，thep？SSuredifftrentialacrosstheorinceCliscom㌍unicatedtothepressurechambers

（A，B）ofthepriorltyValvesothatthespool（1）movestoaposltlOnWherethepressurediffbrentia

betweenthepressurechambers（A，B）andthecontroIspring（2）strikesabalance，thusdetermining theratiooftheflowtotheCFportandtheflowtotheEFport，COnCernlngtheoildischargedffomthe mainpump．

③TheopeningoftheorinceClinsidetheorbitrolisdetermineddependingonthespeedatwhichthe SteerlngWheelisturned・ThequickerthesteerlngWheelisturned，thewidertheorificeopens・The

Sloweritisturned，thenarrower・Consequently，WhenthesteerlngWheelisturnedquickly，mOreOi

flowstotheCFporttoquickensteerlngOPeration・

Fig・4．16 SteerlngWheelinRotation

−92−

（4）Whensteeringcylinderisatstrokeend

①whenthesteeringwheelisturnedtoitsstrokeendateitherofitsrotationaldirections，nOOilflow

acrosstheorificeClinsidetheorbitrol，thuscauslngnOPreSSuredifftrential・ ②consquently，thepressureinthepr？SSureChamber（B）inthepriorityvalveincreaseswithincre circultPreSSure，butatacertainpolnt，thereliefvalve（3）isactuatedtoreducethepressure PreSSureChamber（B）・

③Inthiscondition，thepressureinthepressurechambers（A，B）ofthepriorityvalvearecontroll theorificeC2．Thespool（1）movestotherightinthefiguretoclosetheCFport，Whileopeningth EFporttoalmostfu11y−OPenlngState・

Fig・4・17 SteerlngCylinderisatStrokeEnd −93−

4．6 STEERJNGCYLINDER AsteerlngCylinderofdoubleactlngPIStOntyPeisused，Withthepistonrodandcylindertubeconnected tothefrontandrearframe，reSPeCtively・Theloaderissteeredbythepistonrodextendingandretractlng・

』

View100kingfromZ

1314 15 1617

Note：匡＞Pressurecheckport（Rcl／8）

B＞ぢ＝：：：コ35kg−m（250ft−1bs），紹＝ゝthreadedarea：ThreeBond＃1901 匪＞（芯＝＝コ33kg−m（240糾bs）

1．PINBUSHING

7．‖0‖−RING

12．‖U一 −NUT

2．PISTONROD

8．CYLINDERTUBE

13．WIPERRING

3．CYLINDERHEAD

9．SLIDERING

14．BACK−UPRING

4．LOCKWASHER

lO．SEALRINGASSEMBLY

15．‖U‖−RING

5．− 0−▼−RmG

6．BACK−UPRING

（SEALRING／‖0‖−RING）

11．PISTON

16．BUSHING 17．SNAPRING

Fig・4・18 SteerlngCylinder −94−

5．FRAMEANDCOCKPIT

5．1FRAME The丘ameisasteel−Plateweldedtypeanddividedintotwoparts：frontandrearframes・Thecockpit andoperatorlsseataremountedontherearframe・

ADonottrytomodifytheROPS（Roll・OVerPrOteCtionstructure），ifmounted，withou PermissionfromthemanufactureIIIftheROPSshouldgetdamagedordefbrmedduetoturnlng

OVerOrCOllision，itisadvisabletoreplaceitwithanewone，becauseadamagedordefbrm

hasalowstructuralstrength．Ben）retryingtomountanewROPS，besuretowIPeaWaypain

lubricantfromthemountingsurfacesofthestructureandtheframe．

Note：TheawnlngCanOPyShownintheabovesketchisoptlOnal・ Fig．5．1Frame −95−

●

／

1・BALANCINGWEIGHT：740kg（16301bs）

Note：D＞6：＝＝コ33．4kg−m（241ft−1bs）

2．（REARFRAME）

Fig・5・2 AssemblyDrawlngOfBalanclngWeight

5．2 CENTER HINGEP］N

Theloaderisaframe−articulatedtype‥thefrontframeisJOinedtotherearframewithtwohingeplnS aroundwhichtheloaderpIVOtSforsteerlng．

Awhenthel。aderisstee，ed，theareanea，the CenterhingepinsbecomessonarrOWthatyoumight getcaughtbetweenthe蝕・Ontandrearframes．Befbre tryingtoservicetheloader；makesuretosetthesafbty link． Priortomoving（traveling）theloader，make

Surethesafbtylinkissettotheorlglnalposition．

Fig．5．3SafttyLink

●

●

DUST SEAL

［痙1 Detai10fDustSeaIlnsta

ation

Note：B＞14＝ゝThreadedarea：LOCTITE＃572 医＞〆＝＝恥Matingsurfaceofpinandbushing：greaSe

B＞6：：：：：コ6・6−9・8kg−m（48−71R−1bs），14＝ゝthreadedarea：LOCTITE＃262

B＞Pressthebushingsothatthebushingandthissurfaceareatthesamelevel・ （Thebushingshouldnotbeprotruded・） 恒＞Insta11theshimsoastoprovidethesameclearance・

1．PIN

5．BUSHING

9．BOIJ

2．WASHER

6．SNAPRING

lO．SEAL

3．SEAL

7．GREASEFITTING

ll．CRADLEPIN

4．BUSHING

8．SETPLATE

12．BUSHING

Fig．5．4 CenterHinge −97−

6．HYDRAUuCSYSTEM ThehydraulicsystemusesthemainpumpasitspowersourceanddirectsoilflowwiththecontroI Valveaccordingtotheworkyouwanttodo．

Thehydraulicsystemconsistsofthemainpump，COntrOIvalve，ValvecontroIs，Oiltank，andhydraul

0ルCOOLER

●

Note：ThefigureincludesthesteerlngandtransmissionhydraulicplplngS・

Fig・6．1HydraulicSystem −98−

6．10］LCIRCULATLONROUTES

Thehydrauliccircuitoftheloaderconsistsofthemainhydrauliccircuitandsteerlnghydrauliccirc Note：Forthesteerlnghydrauliccircuit，referto‖4・20ILCIRCULArIONROUTES・ 6．1．1MainHydraulicCircuit

TheoilpickedupfromtheoiltankbythemainpumpisdirectedintotheprlOrltyValvewhereitis dividedintotwoportions：Oneforthemainhydrauliccircuitandtheotherforthesteerlnghydraulic circuit．

TheoilforthemainhydrauliccircuitisroutedtothecontroIvalve・WhenthecontroIvalveis

neutral，theoilpassesthroughthecontroIvalvebackintotheoiltank・ Whentheloadhandlinglever（COntrOllever）isoperatedtoshiftthespoolofthecontroIvalve，the

flowsthroughtheoilpassagechosenbythespoolintothecylinder・Theoildischargedfromthec returnsintothecontroIvalvewhichinturnSendstheoilthroughthereturnnlterintotheoiltank・

−99−

BOOM CYLlNDER

Fig・6・2 0ilCircuitDiagram −100−

6．1．2 RETURN FILTER

Thereturnnlterisinstalledinthereturncircuitoftheoilcirculationroutes．Oilpassesthroughthe

filterelement，fromtheoutsidetotheinsideofit，andreturnstotheoiltank．

Whenthereturnfilterelementisclogged，thepressureattheinletportsideincreases・Theoildoe

PaSSthroughthenlterelementtopressthebypassvalveopen，andflowsintotheoutletportdirectly・ Thefilterusesacartridgetypeelement・Replacethefiltercartridgeifnecessary・

Note：Forthereturnnlterinstallation，See‖Fig．6．200ilTank・

1．HEAD 2．BYPASSVALVE 3．PACKING 4．FILTERCARTRIDGE

Fig．6．3 ReturnFilter

ー101−

6．2 PUMP Mainpump Name

KFP2227

T〉−11e

Gear type

Drive

Gear type

Discharge

64．2e／min（16．9gpm）at2150rpm，210kg／cm2（3000psi） 72．3e／min（19．1gpm）at2350rpm，5kg／cm2（70psi）

Weight

4．7kg（10・01bs）

Usedincommonwithmainpump

Steering pump Chargingpump（Brakepump） Name

KPlO15

T〉−ド

Gear type

Drive

Gear type

Discharge

38．9e／min（10．3gpm）at2150rpm，20kg／cm2（280psi）

Ⅵ屯ight

2．1kg（4．61bs）

Theloaderusestwopumps：themainpumpandcharglngPumP，Whichareattachedtotheconverter houslnganddrivenbythepumpdriveofthetorqueconverter・ TheyalwaysrotateastheenglnerunS・

Note：FortheinstallationofthecharglngPumP，referto 2・1DRIVEUNIT・‖ 6．2．1MAIN PUMP

ThemainpumplSageartyPeWhichdoublesasthesteerlngPumP・

ThemainpumppicksuphydraulicoilfromtheoiltankandsendsittotheprlOrltyValvewhereitis

dividedintotwoportions：Oneforthesteerlnghydrauliccircuitandoneforthemainhydrauliccircuit・

1．MAINPUMP 2．PUMPDRIVESLEEVE 3．TORQUECONVERTER

Fig．6．4 MainPumpInstallation −102−

●

Discharge side

Suction side

lnsideconstruction

1．GEARPLArE

5．COVER

9．0ILSEAL

2．DRIVEGEAR

6．PRESSUREPLATE

lO．SNAPRING

3．DRIVENGEAR

7．PLATESEAL

4．MOUNTINGFLANGE

8．BACK−UPRING Fig．6．5 MainPump −103−

6．2．2CHARGINGPUMP（BRAKEPUMP）

TheloaderusesageartypecharglngPumP・ThecharglngPumPPicksupoilfromthetransmis SumPtankandsendsitunderpressuretothebrakevalve．

TheoildischargedfromthepumpISuSedforcharglngthedriveunitandactuatlngthebrakeunit・

￣二‡￣三￣二 DetaiFofareaC

SectionA−A

Section B−B

1．DRIVENGEAR

6．SIDEPLATE（A）

11．SNAPRING

2．COVER

7．DRIVEGEAR

12．GASKET（A）

3．SIDEPLATE（B）

8．‖0‖−RING

13．GASKET（B）

4．GEARPLATE

9．DOWELPIN

14．BALANCINGSEAL

5．MOUNTINGFLANGE

lO．0ILSEAL

Fig・6・6 CharglngPump −104−

6．3 CONTROLVALVE Model

SVllC

「吋pe

Tandemtype，2−SPOOIslidingtype［w／reliefvalve］

Mainreliefpressuresettlng

210kg／cm2（2990psi）

Portreliefpressuresettlng

230kg／cm2（3270psi）

［Bucketcylinderrodside］

9．9kg（21．81bs）

Ⅵねight

6．3，1GENERALDESCRIPT10N

ThecontroIvalveisastacked，2−SPOOIslidingtype，COnSistlngOftheinletsection，tWOSPOOIsections，

intermediatebodyandendcoversection．Theoilpassagesinsidethevalvearetandemtypeandthebucket OilpassagehasprlOrltyOVertheboomoilpassagesothatthepressureoilissuppliedtotheboomsection Onlywhenthebucketspoolisinneutral．

Note：ForthecontroIvalveinstallation，SeeFig．6．19． （1）Reliervalve

ThecontroIvalveisprovidedwithareliefvalvethatservestoprotecttheentirehydrauliccircuitofthe

loadhandlingsystemwhilecontrollingtheoperatlngPreSSure・ Thecylinderportleadingtothebucketcylinderrodsideisnttedwithaportreliefvalvewhichrelieves theoilpressurewhenthecylinderreceivesaloadheavyenoughtocausethepressureatthecylinderport torisebeyondthespecinedvalue，thusprotectlngthecylinderandthepIPlng・

（2）Detentmechanism

①Amechanicaldetentisprovidedatthepositionwheretheboomspoolisfu11yextended，Oratth boom float position.

②Asolenoiddetentis ．

leveler，SOthatitdoesnotfunctionwhenthebucketiswithintherangefromhorizontaltoroll−ba

position．

ー105−

●

●

Note：B＞（3locations）ぢ＝コ‥4・3kg−m（31ftLlbs） 恒＞（4locations）ぢ＝＝コ：1・1kg−m（8・0ft−1bs），

紹＝ゝthreadedarea：LOCTITENSP−1801−2 B＞（4locations）ぢ：：：：：コ：1・1kg−m（8・0ft−1bs），

紹＝ゝthreadedarea：SEALOCMECNSP−1804 B＞（4locations）ぢ：：：コ：1・3kg−m（9・4ft−1bs） 匝＞（2locations）ぢ＝：コ‥4・Okg−m（29ft−1bs） 「￣￣￣−￣￣￣●￣￣￣￣￣￣￣

1．MAINRELIEFVALVE 2．INLETSECTION 3．PORTRELIEFVAIJVE 4．SPOOLSECTION［BUCKET］

5．ENDCOVERSECTION

D．C24V

6．INTERMEDIATEBODY 7．SPOOLSECTION［BOOM］

TANDEMCIRCUITl Fig．6．7 ControlValve −106−

（BUCKET）

M恋画面覿￣垣 11

、J

10 9 8 7

6 5

、J 4 3 2 1

1．SPOOL

5．LOADCHECKVALVE

9．PIN

2．BACK−UPRING

6．LOADCHECKVALVESPRING

lO．PLATE

3．●−0‖−RING

7．SPRINGCAP

ll．SOLENOIDCOIL

4．VALVEBODY

8．SPRING

●（ち00M）

］二Ⅱコ璽∃二匝

1．SPOOL

5．LOADCHECKVALVE

9．BALL

2．BACK−UPRING

6．LOADCHECKVALVESPRING

lO．SPRING

3．− 0− 一RING

7．ADAPTER

ll．DETENTCAM

4．VALVEBODY

8．SPRING

12．CAP

Fig．6．8 ConstruCtionofSpooISection −107−

6．3．2 0PERAT10N

Whenthecontrolleveris actuated，theoilpassagesare switchedoverbythespooIssothatthe

PreSSurizedoilfromtheprlOrltyValveisselectivelysenttothebucketorboomcylinder・

Theboom‖Floatrlposition andbucket Roll−back position have detentmechanismswhich automaticallyholdthatposition，keeplngthespoolfromreturnlngtOneutralwhentheoperatorremoves hishandfromthelever．ThecontrolleverautomaticallyreturnstoneutralfromoperatlngPOSitionsother thanthe Float and‖Roll−back．■positions．

1． ControlValveinNeutral

①whenthespooIsofthebucketsectionandtheboomsectionareinneutral，boththecylinderports （tailside）andB（rodside）areclosedbythespooIs．

②ThepressurizedoilwhichhasreachedthecontroIvalveflowsthroughtheinletsection，PaStth neutraloilpassagesinthebucketsectionandtheboomsectiontotheoutletsectionfromwhichitis directedtothelow−PreSSureOilpassageandleavesthecontroIvalvethroughtheexhaustportofthe inletsection．

BI

Al

Fig．6．9 ControIValveinNeutral（BucketSpooISection）

−108−

2．BucketSpoolOperation （1）Roll・back

①whenthecontrolleverisplacedinthe‖Roll−backl−position，thebucketspoolispushedinassho inFig．6．10．

②Theneutraloilpassageisclosedbythespoolandthepressureoilpushesopentheloadcheckva flowtothecylinderport（Al）fromwhichitisdirectedintothebucketcylindertail・

③Theoildischargedfromthebucketcylinderrodsideflowsthroughthecylinderport（Bl）tothelow− PreSSureOilpassageandbacktotheoiltank・

BI

Al

Fig．6．10 BucketinRoll−Back

（2）Dump

① whenthecontrolleverisplacedinthef．Dump‖position，thebucketspoolispulledoutass Fig．6．11．

② Theneutraloilpassageisclosedbythespoolandthepressureoilpushesopentheloadcheckva flowtothecylinderport（Bl）h・OmWhichitisdirectedintothebucketcylinderrodside・

③Theoildischargedfromthebucketcylindertailsideflowsthroughthecylinderport（Al）tothelow PreSSureOilpassage．

BI

Fig．6．11BucketinDump −109−

Al

3．BoomSpoolOperation （1）RaiseandDown

TheoilpassageintheboomspooIsectionisidenticalwiththatofthebucketspooIsection・Therefore，

boomralSlngOperationisidenticalwithbucketroll−backoperationwhereasboomlowerlngOPerationis identicalwithbucketdumpoperation・Forthedetailsofboomoperation，Seethepertinentsectionsof

bucketoperation． Note：PressurizedoilisnotsuppliedtotheboomspooIsectionunlessthebucketspoolisinneutralsince theoilpassagesinthecontroIvalveformatandemcircuit．（Theboomcylinderisnotactuated．） （2）Float

①whenthecontrolleverisfurtherpusheddownfromthe‖Down

positiontothe

Float‖position，the

boomspoolispulleddownasshowninFit．6．12．

②Duetothismotiontheneutralpassageisopened．Thepressureoilflowsasifinneutralposition． ③Thecylinderports（A2）and（B2）areconnectedtothelowreSSureOilpassage・Asaresult，the

boomsfloatoverthegroundsurfaceaccordingtoitsirregularltleS・Theoildischargedfromtheboom Cylinderrodsideissenttothetailsideandtheoilforcedoutfromitstailsideissenttotherodside

respectivelythroughthelow−PreSSureOilpassageinthecontroIvalve・

A2

B2

Fig. 6.12 Boom in Floating

−110−

4．DetentOperation （1）Boomside

①whenthecontrolleverispusheddownfu11ytothe 一Float position，theboomspool（1）ispulledfu1l StrOke．Duetothistheprq］eCtionofthespoolend goesoverthedetentball（2）・

②sincethedetentballsarepushedbythedetentspring （4）throughtheballholder（3），theboomspoolholds itsposition，andthedetentbecomesoperative・

（∋Torelease the detent，Setthe controlleverin 一．Neutral‖positionbyhand・

鋼 Fig．6．13 BoomSideDetentinOperation （2）Bucketside

①Theelectromagneticdetentisusedonthebucket section．Theelectricalcircuitisconnectedfromthe batterytotheproximltySWitchofthebucketleveler throughthecoilassemblyofthebucket spooI section．

②whenthebucketistiltedforward，theproximity SWitchiselectricallyclosedsothatthecoilassembly （1）isexcited．

③whenthecontrolleverispulledoutfu11ytothe 一Ro11−back position，thebucketspool（2）isfu11y PuShedin，SOthattheplate（3）contactsthecoil・As

aresultthebucketspoolholdsitsposition，andthe detentbecomesoperative．

④Tbreleasethedetent，electricallyopentheproximity SWitchtode−energlZethecoilassemblyoroperate

thecontrolleverbyhand． Fig．6．14 BucketSideDetentinOperation

−111−

6．3．3 RELIEFVALVE

Therearetworeliefvalves：amainreliefvalveandaportreliefvalve・Themainreliefvalveislocate

betweentheneutraloilpassageandthelow−PreSSureOilpassage（returnoilpassage）intheinletsect

Theportreliefvalveislocatedbetweentherodsidecylinderportandthelow−PreSSurePaSSage（return PaSSage）inthebucketspooIsection． 1．Reliefoperation （1）Ininoperativestate

Thepressurizedoilintheneutraloilpassage（HP）

14 2 3 5

flowsthroughthethrottlehole（2）inthepushrod（1）to

nlltheinternalcavity（3）attherightsideofthepiston （2）．Owing to the differencein areaonwhichthe

hydraulicpressureacts，thepIStOnCloselyseatstothe Vdvesleeve（4）．

Fig・6・15InInoperativeState

（2）Operation（A）

Whenthepressureintheneutraloilpassage（HP）rises enoughtoexceedthereliefpressuresettlng，thepoppet

（5）opens・Thepressurizedoilflowsaroundthepoppet intothelow−PreSSureOilpassage（LP），PaSSingthrough

thedrilledhole．

Fig．6．16 0peration（A）

（3）Operation（B） Asthepoppet（5）opens，thepressureintheinternal

CaVltylowerssothatthepressurizedoilintheneutraloil

PaSSage（HP）flowsdirectlyintothelow−PreSSureOil PaSSage（LP）．

Fig・6・170peration（B）

−112−

2．Suckingoperation

Ifthepressure atthecylinderport（HP）becomes lowerthanthatatthelow−PreSSureOilpassage（LP）due tothe developmentofcavitation，the pIStOn mOVeS dependinguponthedifftrenceinareaonwhichnegative PreSSure aCtS aCrOSS the check valve poppet． Consequently，Oilissuppliedfromthelow−PreSSureOil

PaSSage（LP）tothecylinderportside（HP）toeliminate thecavitation．

LP Fig．6．18 SuckingOperation

ー113−

6．4 VALVECONTROLS

ThevalvecontroIsystemisaslnglelevertype・WhenthecontrolleverismanlPulated，thecont

ValvespooIsareoperatedbythecables；ShiftingtheleverbackandforthwillactuatetheboomspooIwhile Shiftingtheleversidewayswillactuatethebucketspool・

AAsasahtyチevice払rthevalvecontroIsystem，aStOPlinkisprovided・Usethestoplinktolock thecontrolleverlnneutralwhentheloadhandlingsystemdoesnotneedtobeused．

Note：E＞紹＝ゝThreadedarea：LOCTITE＃262 匡＞「⊂＝袖Applygreasewheninstalling． 13

14 15

1．KNOB

6．BUSHING

11．STOPPERLINK

2．CONTROLLEVER

7．BALLLINK

12．BOOT

3．PIN

8．CABLE（FORBOOM）

13．CONTROLVALVE

4．BUSHING

9．CABLE（FORBUCKET）

14．BRACKET

5．BOSS

10．SPRING

15．CUSHIONRUBBER

Fig．6．19 ValveControISystem −114−

Theoiltankholdshydraulicoilforthemainhydrauliccircuitandsteerlnghydrauliccircuit weldedtotheinsideofthefrontframe．

ThereturnfilterislocatedinthemiddleofthereturnlinebetweenthecontroIvalveandtheoiltank．

1．CAP

6．LEVELGAUGE

ll・HOSE

2．FImR

7．（FRONTFRAME）

12・RETURNFI皿R

3．FILLER

8．（0ILTANK）

13・HOSE

4．GASKET

9．DRAINPLUG

5● OSE

lO

CONTROLVA⊥VE

Fig．6．20 0ilTank −115−

7．LOADHANDLINGSYSTEM

Theloadhandlingsystemisoperatedbyhydrauliccylindersandisusedtodig，loadandunload，

transportloads・ThelinkageemployedfbrtheloadingsystemisaZ−Shapetypewhichissimplerindesign andproducesmorepowerfu1bucketbreak−Outforcethantheduplexorothertypes・

Fig・7・1LoadHandlingSystem

−116−

7．1BOOM，BELLCRANK，ANDBUCKET Linkage

Z−Shape

Bucket shape

DEB

Bucketcapaclty Heaped

0．9mj（1．2yd3）

Struck

0．8mさ（1．Oyd3）

Bucket leveler

Provided

Boom kickout

Optional

Weight Boom

289kg（6371bs）

Bellcrank

58kg（1281bs）

Pushrod

16kg（351bs）

Bucket

268kg（5911bs）

7，1．1GENERALDESCRIPTLON Theloadhandlingsystemconsistsofbooms，bellcrank，PuShrod，bucket，bucketcy

cylinders，andpins・Thebucketlevelerhelpsprovideefficientloadhandlingoperation・Allconne

plnSOftheloadhandlingsystemhavedustsealstopreventtheentranceofwater，mudordustintothe

system・ThethreeconnectlngPlnSOfthebucketareprovidedwith． 0 一−rings・AlltheconnectlngPlnSar securedwithlockbolts．

【ThenamesofthepartsinFig．7．2］

1．BUCKETCYLINDER

6．FRONTFRAME

1l．BUSHING

2．BELLCRANK

7．SPACER

12．DUSTSEAL

3．PUSHROD

8．BOOMCYLINDER

13． 0‖−RING

4．BOOM

9．PIN

14．LOCKBOLT

5．BUCKET

lO．GREASEFITTING −117−

●

●

（Pinsonbucket）

DetaiIoftypicalpin

Note：B＞忙＝：恥Allpins，bushings，andbosses：Grease（Applybeforeinstallingpins） 臣＞Dustsealmustbeinstalledwithlipfacingoutward． Fig・7・2 Boom，Bellcrank，andBucket（1） −118−

Procedurefbrmountingthebucketstopper

ProcedurefbrmountingplnSrelatedtothebucket −．●．L

●．−．﹂

﹁．■．1．−．﹂

﹁t■．■．−．L

●

①Befbreassemblingthebucketandboomwith twoplnS，andbucketandpushrod，SettheO− rlngSaSShowninFig・7・3・

②Afterassemblingthebucket，boomandpush

一

一

rod，aPPlygreaseallperipheriesoftheareas

indicatedwithamark＊andinserttheO−rings inthegrooves．

● Fig．7．3 Boom，Be11crankandBucket（2）

ー119−

7．1，2 BUCKET Thegeneralpurposebucketwithabolt−OnreVerSiblecuttingedge（DEB）isstandard．Thelight−

materialbucketwithweldedcuttlngedgeandthegeneral−PurPOSebucketwithbolt−OnteethareoptlOnal available．

Thebucketshouldbeselectedwithduecare，COnSideringtheconditionofjobsites，thenatureofload

tobehandled，andtheoperatlngCOnditions・Awrongbucketwillcauseaninefncientoperationan

CauSethemalfunctionoftheloadhandlingsystemaswell． （General・PurPOSebucketwithreversiblecuttingedge，DEB）

Note：B＞ぢ＝＝コ29．1kg−m（210ft−1bs）

（General・purPOSebucketwithbolt・Onteeth）

●

Note：臣＞ぢ＝：：コ13．1kg−m（94．7氏」bs）

Fig．7．4 Bucket −120−

7．1．3 BUCKETLEVELER WiththecontrolleverputinRoll−backafterdumplngthebucket，thebucketlevelerautomat

returnsthecontrollevertoneutralwhenthebucketisputinhorizontalposition． Operation

①Asthebucketisrolledback，thebucketcylinderpistonrodextendsenughtoletthelevelerbarleave thesensingsurfaceoftheproximityswitch（thusopeningtheelectricclrCuit）・

②TheproximityswitchisconnectedtothesolenoiddetentcoilofthecontroIvalvebucketsection・Th solenoiddetentisthusreleasedtoletthecontrolleverreturntoneutral，StOPPlngtherollingback OPerationofthebucket・

Note：Thebucketspoolisasolenoiddetentmechanism・Whenthebucketisrolledbackbeyo horizontalline，CurrentStOPStOthesolenoiddetentcoilsothatthecontrolleverdetentmechanism wonTtwork．

1．BUCKETCYLINDER 2．LEVELERBAR 3．BRACKET 4．PROXIMITYSWITCH

4 5

Fig．7．5 BucketLeveler

−121−

5．WIRING

7．2 CYLJNDERS Boom cylinder 「吋pe

Double−aCtlngPIStOn

Q ty

2

Cylinderbore

80mm（3．1in）

Cylinderrodouterdiameter

45mm（1．8in）

Cylinderstroke

611mm（24．1in）

Weight（PerCylinder）

37kg（821bs）

Bucketcylinder r吋pe

Double−aCtlngPIStOn

Q■ty

1

Cylinderbore

85mm（3．3in）

Cylinderrodouterdiameter

50mm（2．Oin）

Cylinderstroke

441mm（17．4in）

勒ight

33kg（731bs）

7．2．1BOOMCYuNDERS Thetwoboomcylindersaredouble−aCtlngplStOntyPe・Theboomcylindersareextendedorretracted，

raislngOrlowerlngtheboomsrespectively．Theboomcylinderconsistsofacylindertube，Cylinderhead PIStOnrOd，Piston，andpackings・ 7．2．2 BUCKETCYuNDER

Thebucketcylinderisadouble−aCtlngPIStOntyPe．Asthebucketcylinderisextendedorretracted，t

bucketisdumpedorrolledbackthroughthebellcrankandpushrodmechanism・Thebucketcyli COnSistsofthecylindertube，Cylinderhead，Pistonrod，Pistonandpackings・

ー122−

●

● 16

15

Note：D＞ぢ＝コ46±10・6kg−m（330±77ft−1bs），正⊃ゝthreadedarea‥ThreeBond＃1901 B＞ぢ＝コ105kg−m（789ft−1bs）

匡＞ぢ：：：：：：コ1．65kg−m（11．9ft−1bs）（Aftertightening，Calk2parts・） 1．CYLINDERHEAD

7．U−RING

13．SETSCREW

2．‖0− −RING

8．PISTONROD

14．STEELBALL

3．BACK−UPRING

9．CYLINDERTUBE

15．PINBUSHING

4．‖0 −RING

lO．SLIDERING

16．PIPE

5．WIPERRING

ll．SEALRING／

6．BUSHING

12．PISTON

0．一−RING

Fig．7．6 BoomCylinder −123−

￣1

J忘￣

●

L三

●

Note：D＞ぢ＝コ50±11・5kg−m（360±83f［−1bs），14＝ゝthreadedarea：ThreeBond＃1901 B＞ぢ：：：：：：コ1・65kg−m（11．9ft−1bs）（Aftertightening，Calk2parts．） 匪＞ぢ：：：：コ130kg−m（940糾bs）

B＞Pressurecheckport（PTl／8）

1．CYLINDERHEAD

7．U−RING

13．SETSCREW

2．■−0 −RING

8．PISTONROD

14．STEELBALL

3．BACK−UPRING

9．CYLINDERTUBE

15．PINBUSHING

4． −0■■−RING

lO．SLIDERING

16．PIPE

5．WIPERRING

ll．SEALRING／‖0▼一−RING

6．BUSHING

12．PISTON

Fig・7・7 BucketCylinder −124−

8．ELECTRLCSYSTEM 8．1LIGHTINGEQUIPMENT Name

Specincation

Headlights

24V 62／62W

Widthlamps

24V 5W

Turnsignals（front）

Q−ty

Remarks

2

2

Front combination lamp

2

Rearcombinationlamp

24V 25W

Brakelamps 24V 25／10W Taillamps Back−uPlamps

24V12W

TurnSignals（rear）

24V 25W

Licensenumberplatelamp

24V12W

−125−

8．2 METERSANDSWITCHES

8・2・1MONITORLAMPS（CLUSTERGAUGEUN［T） TheoperatlngStatuSmOnitorsystemmonitorstheloaderoperatlngStatuSbymeansofthesensorsand

SWitchesinstalledontheloaderanddisplaystheinformationontheclustergaugeunitintheoperator・s COmPartmenttOinformtheoperatorofthecurrentoperatlngStatuSOftheloader． Theclustergaugeunitconsistsofmetersincludingthespeedometer，mOnitorlamps（waminglamps） WhichindicateswhetherornoteachsystemisoperatlngPrOPerly，andindicatorlamps・

q □ D

FM

：FUELMETER

WTM ：ENGINEⅥ仏TERTEMPERATUREGAUGE OTM ：TRANSMISSIONOILTEMPERATUREGAUGE EHM ：ENGINEHOURMETER SM

：SPEEDOMETER

Ll−L13：MONITORLAMPS L14−L18：INSTRUMENTLAMPS （CircuitDiagram）

Fig・8・1ClusterGaugeUnit（1） −126−

CONN． No．

Connectedto

CONN． No．

Connectedto

●cNl

15 Charge

口 Turnsignal（R）

2 Highbeam

CNl

16 （Ajrc】eaner）

17 Parkingbrake 18 Worklight

3 Turnsignal（L）

4 Watertemperaturesensor 5 Engineoilpressure

19 Instrumentlamp

6 Powersource

20 Powersource

●cN2

21 （Emergencysteering）

CNl 8 Fuelsensor

CN2

9 Speedsensor

23 OPT−1

10 （Notconnected）

24 CNト3

四 （Notconnected）

25 Transmissioncuト0ff

12 （Notconnected）

26 Brakeoillevel

13 Ground

●cN3

27 HourmeterGND

CN3

14 CNl−3

28 Hourmeterpowersource

Fig．8．2 ClusterGaugeUnit（2）

1．Meters

Meter

Enginewater

Transmissionoil temperaturegauge

temperaturegauge

Fuelmeter

150℃

135℃

E F

50℃120訝

Scale

67℃ 罠 02拶

嘲

0旦

団

Measurementpolnt 670c（1530F）ノ 1020c（2160F）ノ 500c（1220F）／ 1200c（2480F）／ Standardvalue

49．8n

Sensor

Application

Fue‖evelsenderunit

Fuelmeter

Thermosenderunit Thermosenderunit

Enginewater temperaturegauge

16．8n

91．7n

10．4n

Specifications Float

E

1／2

80

32

Transmissionoil temperaturegauge

80n

10n

F Insidefueltank

10

120 Upperfrontofenglne （1．22）80（176） （248） （coolingfanside） 80

−127−

F／

Location

Resistancef2

TbmperatureOc（CF） 50

E／

30

10

Tbrqueconverter

2・MonitorLamps（WarningLamps）

Theloaderisprovidedwithatotalof6monitorlamps‥3warninglamps（Nos．l，2，and6）and3

indicatorlamps（Nos．3，4，and5）．

ThewarnlnglampscomeonwhenthestarterswitchisturnedtotheONposition・Ifanywarnlnglamp doesn−tcomeon，itissuspectedthatthebulbisblownout．

No．

Name Engine oil pressure

口 ▲ 2

Eヨ Batteryv？1tage

3

暖》 pNkingbrake

惑Iworklight

4

ノ

5 O

Application

Name Oilpressureswitch

Oilpressurebelowspecifiedoroilnlterclogged

Batteryundercharged

Parking brake applied

Light is on

clutchcut−0ff

6 嘲 Brakeoillevel

EnglneOilpressure

Pressureswitch （Inchingswitch）

Description（Whenitcomeson）

Brakeoilpressure

Clutchcut−0ffswitchisON（non−inching）

Levelisbelowspecined

Specifications Operatingpressure：0・5kg／cm2（7・1psi） OFF：35kg／cm2（500psi） ON：25kg／cm2（360psi）

Location Rightsideofenglne

Tubingofservicebrake

（TurnSONatatmosphericpressure．） Pressureswitch Parkingbrake

OFF：4kg／cmコ（57psi）

（parkingbrakeswitch）

Spring chamber elbow

ON：3kg／cm2（43psi）

（れlrnSONatatmosphericpressure．） Levelswitch

Brake oil level

TbrnSOnbelowoperatlnglevel

Incorporatedinbrakeoil tank

−128−

8．2，2 LIGHTINGSWITCH

R LR L

LB RW LW

L LR R LW RW LB ONl OFF ON2 Fig．8．3 LightingSwitch

8．2．3 TURNS［GNALSWITCH （Turnsignalswitchconnectiontable）

●

Connectedto Flasher Right unit Left TeminalNo． 6 L

5

TF O

TL

N R

TFO

OTL

● （Dimmerswitchconnectiontable） Connectedto MAIN DIMMER BATT TerminalNo． 7

3

DIMMER MAIN

Fig．8．4 TurnSignalSwitch −129−

○

2

8．3 ELECTRICCIRCUITDIAGRAM Note：Wirecolors：

Thewiresareclassifiedbycolor．ThefirstsymboIshowstheinsulationcolorandthe2ndthe

markingcolor．

Wirediameter 30mm2 5．Omm2 1．25mm2

B 〆「

20 GH

（25HX2）

A：indicatesthewirenumberandcolor B：indicatestheconsumptionpower（electriccurrent）

ABeb，etryingt。W。rk。ntheelectricsystem，bes。ret。disc。nneCtthebatte，yC。

Whendisconnectingthebatteryconnectors，nrStdisconnectthenegativeside（・）terminalbe

removlngtheotherterminal．

ー130−

ー「

l

l Fし圧 （15A）

t

l

l

】

1

「

l

l

F−3．R−3 T／M（OP）

田 】l

●

47咄ト』■R

国

l

1

● ● ● ●

●

●

●

●

No．SEW・617AE tSSUED：APRtL，1998

TOYOUM臥NKICO，LTD TRAD［NGOFFICE：15−5，1−Chome，Nishi−＄himbashi，Minato−ku，−TbkyolO5・0003，Japan

TELEX：J−23991TCMTOK AIJrightsreserved

FAX：Japan3−35918152 OT−1004040（OS−136）PrintedinJapan

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●

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●

●

●

●

●

●

7 CJ明TOYOUMFnNKICO，LrD