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Toro Backhoe, RT1200 Trencher User manual

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FormNo.3377-976RevA
Backhoe
RT1200Trencher
ModelNo.25452—SerialNo.314000001andUp
ModelNo.25452E—SerialNo.314000001andUp
Registeratwww.Toro.com.
OriginalInstructions(EN)
*3377-976*A
WARNING
CALIFORNIA
Proposition65Warning
Thisproductcontainsachemicalorchemicals
knowntotheStateofCaliforniatocausecancer,
birthdefects,orreproductiveharm.
Introduction
Thisattachmentisdesignedtodiginsoiltoburycablingand
pipingforvariousapplications.Itisnotintendedtocutrock,
wood,oranyothermaterialotherthansoil.
Readthisinformationcarefullytolearnhowtooperateand
maintainyourproductproperlyandtoavoidinjuryand
productdamage.Youareresponsibleforoperatingthe
productproperlyandsafely.
YoumaycontactTorodirectlyatwww.Toro.comforproduct
andaccessoryinformation,helpndingadealer,ortoregister
yourproduct.
Wheneveryouneedservice,genuineToroparts,oradditional
information,contactanAuthorizedToroServiceDealer
orToroCustomerServiceandhavethemodelandserial
numbersofyourproductready.Figure1illustratesthe
locationofthemodelandserialnumbersontheproduct.
Writethenumbersinthespaceprovided.
Figure1
1.Locationofthemodelandserialnumberplate
ModelNo.
SerialNo.
Thismanualidentiespotentialhazardsandhassafety
messagesidentiedbythesafetyalertsymbol(Figure2),
whichsignalsahazardthatmaycauseseriousinjuryordeath
ifyoudonotfollowtherecommendedprecautions.
Figure2
1.Safetyalertsymbol
Thismanualuses2wordstohighlightinformation.
Importantcallsattentiontospecialmechanicalinformation
andNoteemphasizesgeneralinformationworthyofspecial
attention.
©2014—TheToro®Company
8111LyndaleAvenueSouth
Bloomington,MN55420
2
Contactusatwww.Toro.com.
PrintedintheUSA
AllRightsReserved
Contents
Safety...........................................................................3
SafetyandInstructionalDecals.................................4
Setup............................................................................6
1PreparingtoInstalltheAttachmentontothe
Machine.............................................................7
2InstallingtheBackhoeFrameandSwingTower
ontotheMachine.................................................7
3InstallingtheBackhoeWiringHarness.....................8
4InstallingtheWalkwaytotheMachine......................9
5ConnectingtheControlstotheWiring
Harness.............................................................11
6InstallingtheControlsCoverandthe
Panels...............................................................13
7InstallingtheStabilizers........................................14
8InstallingtheStabilizerHydraulicCylinders..............14
9InstallingtheBoom..............................................15
10InstallingtheBoomHydraulicCylinder.................16
11ConnectingtheHydraulicPressureandReturn
Hoses................................................................16
12BleedingtheStabilizerCylinders...........................17
13ConnectingtheHydraulicHosestotheBoom
HydraulicCylinder..............................................17
14BleedingtheBoomElevationCylinder..................18
15InstallingtheDipper...........................................19
16InstallingtheDipperHydraulicCylinder................20
17InstallingtheBucket...........................................21
18ConnectingtheHydraulicHosestotheDipper
andBucketHydraulicCylinders............................22
19BleedingtheHydraulicSystem.............................25
20TestingtheOperator-presenceSwitchandthe
E-stopSwitch.....................................................26
21LubricatingtheStabilizers....................................27
ProductOverview.........................................................27
Controls...............................................................27
BoomControls...................................................27
DipperandBucketControls.................................28
Swing-lockPinandBoom-lockHandle..................28
Specications........................................................30
Operation....................................................................30
UsingtheStabilizers................................................30
UsingtheBoomandSwingLocks.............................32
PreparingtoUsetheBackhoe..................................33
ControllingtheBackhoe..........................................35
DiggingwiththeBackhoe........................................36
MovingtheBackhoeandtheMachine.......................36
TransportingtheMachine........................................37
OperatingTips......................................................37
Maintenance.................................................................39
LubricatingtheBackhoe..........................................39
RaisingandLoweringtheSeat..................................41
Storage........................................................................42
Safety
DANGER
Theremaybeburiedpower,gas,and/ortelephone
linesintheworkarea.Anelectricshockoran
explosionmayoccurifyoudigintoautilityline.
Havethepropertyorworkareamarkedforburied
linesanddonotdiginmarkedareas.Contactyour
localmarkingserviceorutilitycompanytohavethe
propertymarked(forexample,intheUnitedStates,
call811forthenationwidemarkingservice).
WARNING
Whengoingupordownhill,themachinecould
overturniftheheavyendistowardthedownhill
side.Someonemaybepinnedorseriouslyinjured
bythemachineifitoverturns.
Operateupanddownslopeswiththeheavyendof
themachineuphill.Anattachedbackhoewillmake
thefrontendheavy.
WARNING
Lightningcancausesevereinjuryordeath.
Iflightningisseenorthunderisheardinthearea,
donotoperatethemachine;seekshelter.
CAUTION
Hydraulicuidescapingunderpressurecan
penetrateskinandcauseinjury.Fluidinjectedinto
theskinmustbesurgicallyremovedwithinafew
hoursbyadoctorfamiliarwiththisformofinjury;
otherwise,gangrenemayresult.
•Keepyourbodyandhandsawayfrompin-hole
leaksornozzlesthatejecthigh-pressure
hydraulicuid.
•Usecardboardorpapertondhydraulicleaks;
neveruseyourhands.
3
CAUTION
Hydraulicttings,hydrauliclines/valves,and
hydraulicuidmaybehotandcanburnyouifyou
touchthem.
•Weargloveswhenmaintaininghydraulic
components.
•Allowthetractionunitandallattachmentsto
coolbeforetouchinghydrauliccomponents.
•Donottouchhydraulicuidspills.
SafetyandInstructionalDecals
Safetydecalsandinstructionsareeasilyvisibletotheoperatorandarelocatednearanyareaofpotential
danger.Replaceanydecalthatisdamagedorlost.
125-6690
1.Wholebodycrushinghazard—keepawayfromthemachine
wheninoperation.
4
125-8474
1.Warning—readtheOperator’sManual.
10.Lowertherightstabilizer.
2.Tipping/crushinghazard—readtheOperator’sManual.
11.Raisetherightstabilizer.
3.Explosionhazard;electricshockhazard—donotdiguntilyou
havecalledlocalutilities.
12.Raisethebucket.
4.Movethebackhoeboomtotheleft.13.Movethebackhoearmforward.
5.Lowerthebackhoeboom.14.Dumpthebucket.
6.Movethebackhoeboomtotheright.15.Movethebackhoearmrearward.
7.Raisethebackhoeboom.
16.Stoptheengine.
8.Lowertheleftstabilizer.17.Starttheengine.
9.Raisetheleftstabilizer.
125-8476
1.Unlocktheboomonly
whenintheoperating
position.
3.ReadtheOperator’s
Manual.
2.Locktheboombefore
leavingtheoperating
position.
127-1827
1.Driveforward
5.Engine—Increasespeed
(rpm)
2.Drivereverse6.Engine—Decreasespeed
(rpm)
3.Lowerthebackllblade
7.Engine—start
4.Raisethebackllblade
5
Setup
LooseParts
Usethechartbelowtoverifythatallpartshavebeenshipped.
ProcedureDescription
Qty.
Use
1
Nopartsrequired
–
Preparetoinstalltheattachmentonto
themachine.
Backhoeframeandswingtower
1
Bolt(1-1/4inchx3-1/2inches)
4
Washer(1-1/4inch)
4
2
Locknut(1-1/4inch)
2
Installthebackhoeframeandswing
towerontothemachine.
3
Backhoewiringharness1Installthebackhoewiringharness.
Walkway1
Handrail1
Pivotsupportbracket1
Greasetting
1
Bolt(M12x40mm)
5
4
Locknut(M12)
5
Installthewalkway.
E-stopswitch1
5
Operator-presenceswitch
1
Routeandconnectthecontrolstothe
wiringharness.
6
Nopartsrequired
–
Installthecontrolscoverandthepanels.
Stabilizer
2
Mountingpin2
7
Snapring
4
Installthestabilizers.
Stabilizerhydrauliccylinder
2
Spacer
2
Cylindermountingpin(1-1/4x7-1/2
inch)
2
Retainerpin2
Hex-headbolt(3/8x1–1/2inch)
2
Washer(3/8inch)
2
8
Locknut(3/8inch)
2
Installthestabilizerhydrauliccylinders.
Boom1
Boompivotpin2
Hex-headbolt(1/2x2inch)
2
Washer(1/2inch)
2
Spacer
2
9
Locknut(1/2inch)
2
Installtheboom.
Boomhydrauliccylinder1
Boomcylindermountingpin1
Hex-headbolt(3/8x1-1/2inch)
1
10
Locknut(3/8inch)
1
Installtheboomcylinder.
Hydraulichose(0.75x28.3inches)
1
11
Hydraulichose(0.75x29.4inches)
1
Connectthehydraulicpressureand
returnhoses.
12
Nopartsrequired
–
Bleedthestabilizercylinders.
Hydraulichose(0.75x31.5inches)
1
13
Hydraulichose(0.75x32.4inches)
1
Connectthehydraulichosestothe
boomhydrauliccylinder.
6
ProcedureDescription
Qty.
Use
14
Nopartsrequired
–
Bleedtheboomelevationcylinder.
Dipper1
Dipperpivotpin(2x9-3/4inches)
1
Tabbedwasher1
Slotted-spannernut(1-3/4inch)
1
Retainerpin1
15
Greasetting
2
Installthedipper.
Hydrauliccylinder1
Dippercylinderpin(1-1/2x5.83inches)
1
Snapring
1
16
Retainerpin1
Installthedipperhydrauliccylinder.
Bucket1
Bucketpin2
Snapring
2
Bolt(3/8x1–1/2inch)
2
Lockwasher2
17
Locknut2
Installthebucket.
Hydraulichose(0.75x63.2inches)
1
Hydraulichose(0.75x65.6inches)
1
Hydraulichose(0.75x104.7inches)
1
Hydraulichose(0.75x108.9inches)
1
Anglestrap4
Hex-headbolt(5/16x3-1/4inch)
4
Washer(5/16inch)
8
18
Locknut(5/16inch)
4
Connectthehydraulichosestothe
boomhydrauliccylinder.
19
Nopartsrequired
–
Bleedthehydraulicsystem.
20
Nopartsrequired
–
Testtheoperator-presenceswitchand
theE-stopswitch.
21
Nopartsrequired
–
Lubricatethestabilizers.
Important:Ensurethatthereisadequatespacetomove
thestabilizersandthebackhoearmtofullextension
andthatthemachineandtheattachmentsareclearof
obstructions.
Note:Forillustrationsoftheattachmentinstalledonthe
tractionunit,refertoProductOverview(page27).
1
PreparingtoInstallthe
AttachmentontotheMachine
NoPartsRequired
Procedure
1.Parkthemachineonalevelsurface.
2.Lowertheattachment(s)totheground.
3.Stoptheengineandremovetheignitionkey.
7
2
InstallingtheBackhoeFrame
andSwingTowerontothe
Machine
Partsneededforthisprocedure:
1
Backhoeframeandswingtower
4
Bolt(1-1/4inchx3-1/2inches)
4
Washer(1-1/4inch)
2
Locknut(1-1/4inch)
Procedure
WARNING
Liftingheavymachinesandattachmentsimproperly
couldresultinseriousinjuryorevendeath.
Whenliftingheavymachinesandattachments,use
liftingequipment,suchaschainsandstraps,thatis
ratedfortheweightoftheequipment.
1.Attachtheliftingequipmenttothebackhoeframeand
swingtowerandsetitinpositionatthefrontofthe
machine(Figure3).
Important:Ensurethattheliftingequipmenthas
aliftingcapacityofatleast1058kg(2,332lb).
Figure3
2.Aligntheholesinthebackplateandthemounting
armsofthebackhoeframewiththemountingholes
inthemachine(Figure4).
Figure4
1.Sidemountingholeonthe
tractionunit(2)
3.Holeinmountingarmof
thebackhoe(2)
2.Frontmountingholes
4.Holesinthebackplateof
thebackhoe
3.Securethebackhoeframeandswingtowertothefront
ofthemachinewith4bolts(1-1/4inchx3-1/2inches),
4washers(1-1/2inch),and2locknuts(1-1/4inch).
Note:Installthe2boltsthroughthefrontmounting
holessothattheboltthreadsappearoutfromthefront
ofthemachine.
4.Torqueall4boltsandnutsto678to813N-m(500
to600ft-lb).
8
3
InstallingtheBackhoeWiring
Harness
Partsneededforthisprocedure:
1Backhoewiringharness
Procedure
1.RotatethebatterydisconnecttotheOffposition;refer
tothetractionunitOperator’sManual.
2.Removetheleft-sidepanelofthemachine;refertothe
tractionunitOperator’sManual.
3.Gototheleftsideofthemachine,locatethebranchof
themachinewiringharnesswitha12-socketconnector
locatedjustinsidetheleftrailframenearthetopofthe
tire(Figure5),andremovethecoverontheconnector.
Figure5
1.Backhoewiringharness3.12-socketconnector
2.12-pinconnector
4.Locatethe12-pinconnectoronthebackhoewiring
harnessandinsertitthroughtheholeinthesideofthe
leftrailframe(Figure5andFigure6).
Figure6
1.Backhoewiringharness
2.Holeinthesideoftheleft
railframe
5.Connectthe12-pinconnectoronthebackhoewiring
harnesstothe12-socketconnectoronthemachine
wiringharness(Figure5).
6.Routethebackhoewiringharnessforward,alongthe
leftrailangeandthebackofthebackhoecontrol
platform(Figure6).
7.Installtheleft-sidepanel;refertothetractionunit
Operator’sManual.
Note:Youwillnishinstallingthewiringharnessafteryou
installthewalkway;referto4InstallingtheWalkwaytothe
Machine(page9).
9
4
InstallingtheWalkwaytothe
Machine
Partsneededforthisprocedure:
1Walkway
1Handrail
1Pivotsupportbracket
1
Greasetting
5
Bolt(M12x40mm)
5
Locknut(M12)
InstallingthePivotBracket
1.Threadthegreasettingintotheholeinthecylindrical
partofthepivotsupportbracket(Figure7).
Figure7
1.Pivotsupportbracket
3.Greasetting
2.Locknut—M12(3)4.Bolt—M12X40mm(3)
2.Aligntheholesinthepivotsupportbracketwiththe
holesintheforwardangeofthefueltank(Figure7).
3.Looselyinstallthebrackettothefueltankwith3bolts
(M12x40mm)and3locknuts(M12)asshownin
Figure7.
InstallingtheWalkway
1.Insertthepivotpinofthewalkwayintothepivot
bracketcylinder(Figure8).
Figure8
1.Walkwaysupportbracket4.Walkwaymountbracket
2.Walkway
5.Forward,horizontalange
ofthewalkway
3.Pivotpin6.Pivotbracketcylinder
2.Applygreasetothegreasettinguntilitisvisible.
Note:Useageneral-purpose,lithium-basedgrease.
Note:Cleanupanyexcessgreaseonthepivotsupport
bracket.
3.Rotatethewalkwayclockwiseuntiltheholeinthe
forward,horizontalangeofthewalkwayalignswith
theholeinthewalkwaysupportbracket(Figure9).
Figure9
1.Lockingpin3.Walkway
2.Theholesinthewalkway
supportbracketandthe
forward,horizontalange
ofthewalkwayarealigned.
Note:Raiseorlowerthepivotbracketasneededto
aligntheholes(Figure9).
4.Tightentheboltsandlocknutsthatsecurethepivot
supportbrackettotheforwardangeofthefuel-tank
(Figure8).
Note:Torquetheboltsandlocknutsto112to140
N-m(83to103in-lb).
5.Securethewalkwaytothewalkwaysupportbracket
withthelockingpin(Figure9).
10
InstallingtheHandRail
Securethehandrailtothewalkwaywith2bolts(M12x40
mm)and2locknuts(M12)asshowninFigure10.
Figure10
1.Bolts(M12x40mm)3.Locknuts(M12)
2.Handrail4.Walkway
5
ConnectingtheControlstothe
WiringHarness
Partsneededforthisprocedure:
1E-stopswitch
1
Operator-presenceswitch
Procedure
1.Removethe4bolts,4washers,and4nutsthatsecure
thecontrolscovertotheoperatorpedestalofthe
backhoe,thenremovethecover(Figure11).
Figure11
1.Operatorpedestal4.Bolt(4)
2.Controlscover5.Nut(4)—notshown
3.Washer(4)
2.Routethebackhoewiringharnessalongtheleft
hydraulictubealongtheoperatorplatform.
3.Routetheharnessupundertheconsoleasshownin
Figure12.
Figure12
Frontview
1.Backhoewiringharness
4.Routethebranchoftheharnesswitha2-socket
connectorthroughtheseat-posttube(Figure13).
11
Figure13
1.Branchinthewiring
harness
2.Seat-posttube
Note:Ensurethatthereisenoughslackinthebranch
oftheharnesstoconnectittotheoperator-presence
switchandtoallowfortheseattorotatefreely.
5.Connectthe2-socketconnectorofthebackhoewiring
harnesstothe2-pinconnectoroftheoperator-presence
switch(Figure14).
Figure14
1.Two-pinconnector,
backhoewiringharness
2.Operator-presenceswitch
6.Installthewiringharnessundertheconsoleasshown
inFigure15.
Figure15
1.Console
3.Two-pinconnector
2.Ten-socketconnectors4.Forkedelectricalterminals
7.DisassembletheE-stopswitchassemblyasfollows:
A.Removethebuttoncoverfromthebutton(Figure
16).
G023522
1
2
3
4
5
6
Figure16
1.Buttoncover4.Jamnut
2.Screw5.C-clip
3.Button
6.Switch
B.Removethescrewthatsecuresthebuttontothe
switch,andremovethebutton(Figure16).
C.RemovetheC-clipandthejamnutfromthebody
oftheswitch(Figure16).
Note:RetainallthepartsoftheE-stopswitch
assembly.
8.Connectthe2-forkedelectricalterminalstoterminals
AandBwiththeterminalscrewsandthesaddle
washersoftheE-stopswitch(item6.inFigure16)and
tightenthescrews(Figure17).
12
Figure17
Bottomview
1.TerminalscrewA
3.Saddlewashers
2.E-stopswitch4.TerminalscrewB
6
InstallingtheControlsCover
andthePanels
NoPartsRequired
Procedure
1.InstalltheE-stopswitchassemblyontothecontrols
coverasfollows:
A.Locatethealignmenttangonthebodyofthe
switch(Figure18).
Figure18
1.Switch6.C-clip
2.Alignmenttang
7.Groove
3.Notchinthehole8.Button
4.Jamnut
9.Screw
5.Squaretting
10.Buttoncover
B.Aligntheswitchfromtheinsideofthecontrol
coverandthroughtheholeintheupperright
corner(Figure18).
Note:Ensurethatthealignmenttangonthe
switchalignswiththenotchintheholeforthe
switch.
C.Securetheswitchtothepanelwiththejamnut
(Figure18)thatyouremovedinstepCof5
ConnectingtheControlstotheWiringHarness
(page11).
D.InstalltheC-clip(Figure18)thatyouremoved
instepCof5ConnectingtheControlstothe
WiringHarness(page11)intothegrooveinthe
bodyoftheswitch.
E.Alignthesquarerecessinthebackofthebutton
tothesquarettingoftheE-stopswitch.
F.Securethebuttontotheswitchwiththescrew
(Figure18)thatyouremovedinstepBof5
ConnectingtheControlstotheWiringHarness
(page11).
13
G.Installthebuttoncover(Figure18)thatyou
removedinstepAof5ConnectingtheControls
totheWiringHarness(page11)intothescrew
pocketinthebutton.
2.Aligntheholesofthecontrolscoverwiththeholesin
theoperatorpedestalofthebackhoe(Figure11).
3.Addmedium-grade(serviceremovable)thread-locking
compoundtothe4boltsthatyouremovedinstep1
of5ConnectingtheControlstotheWiringHarness
(page11).
4.Securethecovertothepedestalwiththe4setsof
bolts,washers,andnuts(Figure11)thatyouremoved
instep1of5ConnectingtheControlstotheWiring
Harness(page11).
7
InstallingtheStabilizers
Partsneededforthisprocedure:
2
Stabilizer
2Mountingpin
4
Snapring
Procedure
1.Lubricatetheinsidediameterofthebushingsof
thehingeendofastabilizerwithgeneral-purpose,
lithium-basedgrease(Figure19).
Figure19
2.Lubricatetheinsidediameterofthelowersetof
bushingsonthefrontandbackplatesofthebackhoe
framewithgrease(Figure19).
3.Alignthebushingsinthestabilizerendwiththelower
setofbushingsinthebackhoeframeandfullyinsert
amountingpin(1-1/2x8-7/8inch)throughthe
bushings(Figure20).
Figure20
1.Snapring
3.Lowerbushings
2.Mountingpin(1-1/2x8-7/8
inch)
4.Stabilizer
4.Securethemountingpinwith2snapringsasshown
inFigure20.
5.Repeatsteps3through4toinstalltheotherstabilizer
ontheothersideofthebackhoeframe.
8
InstallingtheStabilizer
HydraulicCylinders
Partsneededforthisprocedure:
2
Stabilizerhydrauliccylinder
2
Spacer
2
Cylindermountingpin(1-1/4x7-1/2inch)
2Retainerpin
2
Hex-headbolt(3/8x1–1/2inch)
2
Washer(3/8inch)
2
Locknut(3/8inch)
Procedure
1.Ensurethatthestabilizerisrestingonthefootpad.
2.Lubricatetheinsidediameteroftheuppersetof
bushingsonthefrontandbackplatesofthebackhoe
framewithgeneral-purpose,lithium-basedgrease
(Figure20).
14
3.Insertacylindermountingpin(1-1/4x7-1/2inch)
partwaythroughtheupperbushingintheforwardplate
ofthebackhoeframe(Figure21).
Note:Ensurethatthecross-drilledholeendofthe
cylindermountingpin(inwhichyouinserttheretainer
pin)isforwardofthefrontstabilizerplate.
Figure21
1.Cylindermountingpin
5.Retainerpin
2.Spacer6.Locknut(3/8inch)
3.Hex-headbolt(3/8x1-1/2
inch)
7.Cylinder
4.Flatwasher
Note:Allowthepintoextendabout25mm(1inch)
beyondthebushing.
4.Slipaspacerovertheexposedendofthepinasshown
inFigure21.
5.Removetheplugsfromtheportsofthecylinderand
covertheholeswithacleanrag.
6.Extendthepistonttingofthecylinderandalignthe
holeinthecylinderttingwiththepin.
Note:Residualhydraulicuidmayejectfromthe
cylinderports.
Note:Ensurethatthehydraulicportsofthecylinder
arepositionedup.
7.Fullyinsertthepinthroughthemountingholeinthe
backplate(Figure21).
8.Inserttheretainerpinintothecross-drilledholeinthe
cylindermountingpin,andsecurethepintothefront
stabilizerplatewithahex-headbolt(3/8x1–1/2inch),
awasher(3/8inch),andalocknut(3/8inch).
9.Lubricatethettingattherodendofthecylinderwith
grease.
10.Repeatsteps1through9fortheotherstabilizer.
9
InstallingtheBoom
Partsneededforthisprocedure:
1Boom
2Boompivotpin
2
Hex-headbolt(1/2x2inch)
2
Washer(1/2inch)
2
Spacer
2
Locknut(1/2inch)
Procedure
1.Lubricatetheinsidediameterofthemountingholesfor
theboomwithgeneral-purpose,lithium-basedgrease
(Figure22).
Figure22
1.Boom
5.Greasetting(2)
2.Mountingholesforthe
boom
6.Hex-headbolt—1/2x2
inch(2)
3.Locknut—1/2inch(2)7.Spacer(2)
4.Boompivotpin—2x3
inches(2)
8.Washer—1/2inch(2)
2.Lifttheboomintopositiononthemachineusing
liftingequipment.
Note:Allowthefreeendoftheboomtorestonthe
oorwhileyouinstalltheboom.
3.Lubricatetheinsidediameterofalltheholesinthe
lowerboomend.
4.Insertthelowerboomendbetweentheswingtower
sideplatesandaligntheholes.
5.Insertaboompivotpin(2x3inches)throughthehole
inbothsideplatesoftheswingtower(Figure22).
6.Secureeachoftheretaininglugswithahex-headbolt
(1/2x2inch),awasher,aspacer,andalocknut.
15
7.Removetheliftingequipment.
10
InstallingtheBoomHydraulic
Cylinder
Partsneededforthisprocedure:
1Boomhydrauliccylinder
1Boomcylindermountingpin
1
Hex-headbolt(3/8x1-1/2inch)
1
Locknut(3/8inch)
Procedure
Note:Ensurethatthefreeendoftheboomissupported
ontheoor.
1.Lubricatetheinsidediameteroftheupperholes
ofthecylindermountinglugwithgeneral-purpose,
lithium-basedgrease(Figure23).
Figure23
Locknutisnotshown
1.Boom3.Boomcylindermounting
pin(1-3/4x3-3/4inches)
2.Cylindermountinglug(2)4.Hex-headbolt(3/8x1-1/2
inch)
2.Lubricatetheinsidediameteroftheholeinthe
piston-endttingofthehydrauliccylinderwithgrease
(Figure23).
3.Removetheplugsfromthecylinderandcoverthe
holeswithacleanrag.
4.Extendthepiston-endttingofthecylinderandalign
theholeinthettingwiththeholesintheboom
mountinghinges(Figure23).
Note:Residualhydraulicuidmayejectfromthe
cylinderports.
5.Securethepiston-endofthecylinderwithaboom
cylindermountingpin(1-3/4x3-3/4inches),a
hex-headbolt(3/8x1-1/2inch),andalocknut(3/8
inch)asshowninFigure23.
6.Lubricatetherod-endttingofthecylinderandboth
mountinglugsonthesideplatesoftheboom(Figure
23).
11
ConnectingtheHydraulic
PressureandReturnHoses
Partsneededforthisprocedure:
1
Hydraulichose(0.75x28.3inches)
1
Hydraulichose(0.75x29.4inches)
Procedure
1.Placeadrainpanunderthebulkheadttingsforthe
hydraulicpressureandreturncircuitsofthemachine
(Figure24).
Note:Thettingsarelocatedontheleftsideofthe
machinenearthefronttire(Figure24).
Figure24
1.Bulkheadttings(capped)
2.Removethecaponeachttingandlooselyinstalla
hydraulictting(3/4inch,90°elbow)ontoeachofthe
2bulkheadttingsasshowninFigure24.
Note:Retainthecapttingssothatyoucaninstall
themwhenyouremovethebackhoe.
16
Figure25
Thewheelandtirehavebeenremovedforthepurpose
ofclarity.
1.Hydraulicpressure
connection
5.Hydraulic-returnhose
(29.4inches)
2.Hydraulicreturn
connection
6.90°hydraulictting(3/4
inch)onthepressureport
3.Hosesupport
7.90°hydraulictting(3/4
inch)onthereturnport
4.Hydraulic-pressurehose
(28.3inches)
3.Routethe2hydraulichosesthroughthehosesupport
asshowninFigure25.
4.Connectandtightenthe2hosestothehydraulic
pressureandsupplytubeslocatedrearwardofthe
left-mountingplateforthebackhoe(Figure25).
5.Connectandtightenthefreeendsofthehosesto
thehydraulicttings(3/4inch,90°elbow)thatyou
installedinstep2asshowninFigure25.
6.Alignandtightenthe2hydraulicttings(3/4inch,90°
elbow)onthebulkheadttings.
7.Torqueall3/4-inchttingsto90to111N-m(66to
82ft-lb).
8.Securethebackhoewiringharnesstothehydraulic
hosesandtubeswithcableties.
12
BleedingtheStabilizer
Cylinders
NoPartsRequired
Procedure
1.Settheparkingbrakeandensurethatallthecontrols
areintheNeutralposition.
2.RotatethebatterydisconnecttotheOnposition;refer
tothetractionunitOperator’sManual.
3.Starttheengineonthemachine;refertothetraction
unitOperator’sManual.
4.Settheenginespeedto1/4throttle.
5.Movetotheoperatorseatofthebackhoe.
6.Moveeachstabilizercontrolforwardandrearward
severaltimesuntilthestabilizersmovesmoothly
throughouttheirfullrangeofmovement.
Figure26
1.Leftstabilizercontrol
2.Rightstabilizercontrol
7.Movebothstabilizerstothedownposition(Figure26).
8.Stoptheengineandremovetheignitionkey.
13
ConnectingtheHydraulic
HosestotheBoomHydraulic
Cylinder
Partsneededforthisprocedure:
1
Hydraulichose(0.75x31.5inches)
1
Hydraulichose(0.75x32.4inches)
Procedure
1.Connectthehydraulichosestotheextendandretract
tubesontheboomcylinderasshownin(Figure27).
17
Figure27
1.Boomcylinderextendtube
(connect31.5-inchlong
hosehere)
2.Boomcylinderretracttube
(connect32.4-inchlong
hosehere)
2.Securetheotherendofthehydraulichosesthatare
connectedtotheextendandretracttubesontheboom
cylindertotheircorrespondingtubesasshownin
Figure28.
Note:Torquethehydraulicttingsto59to72N-m
(43to53ft-lb).
Figure28
1.Boomcylinderretracthose
(31.5inches)
3.Boomreturntube
2.Boomcylinderextend
hose(32.4inches)
4.Boompressuretube
Figure29
1.Boomreturntube4.Boompressuretube
2.Dipperreturntube5.Dipperpressuretube
3.Bucketreturntube6.Bucketpressuretube
18
14
BleedingtheBoomElevation
Cylinder
NoPartsRequired
Procedure
WARNING
Co-workersandbystandersnearthemoving
attachmentpartsmaycomeintocontactwithan
attachmentpart,causingseriousinjuryordeath.
Beawareofwhereotherworkersareinthearea
whileyouarebleedingthehydraulicsystem,and
keepothersawayfromthearea.
1.Ensurethattheendsoftheunconnectedhydraulic
tubesarecapped(Figure30).
Figure30
1.Unconnectedhydraulictubeends
2.Starttheengineonthemachine;refertothetraction
unitOperator’sManual.
3.Settheenginespeedto1/4throttle.
4.Movetheboomelevationcontrolrearward(toraise
theboom)andforward(tolowertheboom)several
timesuntiltheboommovessmoothlythroughoutits
fullrangeofverticalmovement(Figure31).
Figure31
1.Boomcontrol(elevationmovement)
5.Movetheboomtoaverticalpositionthatallowsyouto
installthedipperatacomfortableheight.
6.Stoptheengineandremovetheignitionkey.
15
InstallingtheDipper
Partsneededforthisprocedure:
1Dipper
1
Dipperpivotpin(2x9-3/4inches)
1Tabbedwasher
1
Slotted-spannernut(1-3/4inch)
1Retainerpin
2
Greasetting
Procedure
1.Lubricatetheinsidediameterofthedippermounting
holesintheboomsideplateswithgeneral-purpose,
lithium-basedgrease(Figure32).
19
Figure32
1.Dipperassembly
6.Slotted-spannernut(1-3/4
inch)
2.Retainerpin
7.Greasetting
3.Dipperpivotpin(2x9-3/4
inches)
8.Boom
4.Dippermountingholesin
theboomsideplates
9.Holeindipperend
5.Tabbedwasher
2.Liftthedipperintopositiononthemachineusing
liftingequipment.
3.Lubricatetheinsidediameteroftheholesinthedipper
endwithgeneral-purpose,lithium-basedgrease.
4.Insertthedipperendbetweenthesideplatesofthe
boomandaligntheholes.
5.Inserttheretainerpinthroughthecross-drilledholein
thedipperpivotpin.
6.Alignthetabattheinsidediameterofthetabbed
washerwiththeslotintheretainerpin.
7.Threadtheslotted-spannernut(1-3/4inches)ontothe
retainerpinandtightenituntilaslotinthenutaligns
withatabofthetabbedwasher.
8.Bendthealignedtabofthetabbedwasherintothe
alignedslotintheslotted-spannernut.
9.Insertthedipperpivotpinthroughtheholeinboth
sideplatesoftheboom(Figure32).
10.Securethedipperpivotpinontheboomwitharetainer
pin,atabbedwasher,andaslotted-spannernut(1-3/4
inch);refertoFigure32.
11.Installagreasettingoneachendoftheretainerpin
andlubricatewithgeneral-purpose,lithium-based
grease).
12.Removetheliftingequipment.
16
InstallingtheDipperHydraulic
Cylinder
Partsneededforthisprocedure:
1Hydrauliccylinder
1
Dippercylinderpin(1-1/2x5.83inches)
1
Snapring
1Retainerpin
Procedure
1.Lubricatetheinsidediameteroftheholesatthe
pivotpointonthedipperwithgeneral-purpose,
lithium-basedgrease(Figure33).
20
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