New Holland 750HD, 770HD Disc Mowing Header Service Repair Manual

FORWARD

Appropriateservicemethodsandcorrectrepairproceduresareessentialforthesafe,reliableoperationofall equipment,aswellasthepersonalsafetyoftheindividualperformingtherepair.

ThisServiceManualprovidestroubleshootingandoverhaulinstructionsusingrecommendedproceduresand equipment.Followingtheseinstructionswillensurethesafe,efficient,andtimelycompletionoftheserviceor repair.

Themanualisdividedintosectionswhicharesubdividedintochapters.Eachchaptercontainsinformationon generaloperatingprincipals,detailedinspection,overhauland,whereapplicable,specifictroubleshooting,specialtools,andspecifications.

Anyreferenceinthismanualtoright,left,rear,front,top,orbottomisdeterminedbystandingbehindthemachine andlookinginthedirectionoftravel.

Alldataandillustrationsinthismanualaresubjecttovariationsinbuildspecification.Thisinformationwascorrect atthetimeofissue,butNewHollandpolicyisoneofcontinuousimprovement,andtherighttochangespecifications,equipment,ordesignatanytime,withoutnotice,isreserved.

PRECAUTIONARY STATEMENTS

PERSONALSAFETY

Throughoutthismanualandonmachinedecals,youwillfindprecautionarystatements(ì DANGERî, ìWARNINGî,andìCAUTIONî)followedbyspecificinstructions.Theseprecautionsareintendedforthepersonal safetyofyouandthoseworkingwithyou.Pleasetakethetimetoreadthem.

DANGER

ThiswordìDANGERîindicatesanimmediatehazardoussituationthat,ifnotavoided,willresultindeath orseriousinjury.ThecolorassociatedwithDangerisRED.

WARNING

ThiswordìWARNINGîindicatesapotentiallyhazardoussituationthat,ifnotavoided,couldresultin deathorseriousinjury.ThecolorassociatedwithWarningisORANGE.

CAUTION

ThiswordìCAUTIONîindicatesapotentiallyhazardoussituationthat,ifnotavoided,mayresultinminor ormoderateinjury.Itmayalsobeusedtoalertagainstunsafepractices.Thecolorassociatedwith CautionisYELLOW. M1171

FAILURETOFOLLOWTHEìDANGERî,ìWARNINGî, ANDìCAUTIONîINSTRUCTIONSMAYRESULTIN DEATHORSERIOUSBODILYINJURY.

MACHINESAFETY

Theprecautionarystatement(ìIMPORTANTî)isfollowedbyspecificinstructions.Thisstatementisintendedfor machinesafety.

IMPORTANT: ThewordìIMPORTANTîisusedtoinformthereaderofsomethingheneedstoknowtoprevent minormachinedamageifacertainprocedureisnotfollowed.

INFORMATION

NOTE: Instructionsusedtoidentifyandpresentsupplementaryinformation.

SAFETY

PRECAUTIONARYSTATEMENTS

Acarefuloperatoristhebestoperator.Mostaccidentscanbeavoidedbyobservingcertainprecautions.Tohelp preventaccidents,readthefollowingprecautionsbeforeoperatingthisequipment.Equipmentshouldbe operatedonlybythosewhoareresponsibleandinstructedtodoso.

Carefullyreviewtheproceduresgiveninthismanualwithalloperators.Itisimportantthatalloperatorsbefamiliar withandfollowsafetyprecautions.

1.Donotoperatethediscaugerheaderwithout allthecutterbarshieldsdown,coverskirts installedandisgoodcondition,andcover skirtssnappedtogether.Immediatelyreplace anyskirtthatistornorhasaholeinit.

2.Headerlocksarebuiltintotheheaderliftsystemtolocktheheaderintheraisedposition. Locktheheaderonbothsidesbeforeworkingunderaraisedheader.

3.Usetheamberflashingsafetylightsandroad lightswhendrivingtheself-propelledwindrowerandheaderonthehighway.Besureto usetheroadlights,nottheworklights,becausetherearworklightscouldbemistaken foranoncomingvehicle.

4.Instructinexperiencedoperatorstoreadthe operatorísmanual,safetysigns,andbecome familiarwiththehandlingoftheunitwhich thediscaugerheaderisattached.Operate theunitinuncongestedareaswherethereis nolikelihoodofpersonalinjuryorproperty damage.

5.Nevermakeanyadjustmentsorattemptto workontheunitwiththeenginerunning.Disengagetheheaderdrive,lowertheheaderto theground,orlockitinthetransportposition,shutofftheengine,andengagethe parkingbrakebeforeattemptinganyadjustmentsortryingtoworkontheheader.

6.Tiltthecutterbarbackinfieldswherestones andforeignobjectsarepresent,toraisethe cuttingknives,minimizedebrisdeflected fromtheknivesandreduceknifedamage.

7.STANDCLEAR!Rotatingelementsmay causeseriousbodilyinjury.

8.Donotattempttoremovematerialfromthe discaugerheaderwhileitisinoperation.Shut thewindroweroffandallowtherotatingdiscs tostopbeforeleavingthewindrowercab.

9.Alwaysoperatethediscaugerheaderwith thecoversandshieldsinplace.Donotlean againstorstandonthecoversorshields.

10.Donotattempttoadjusttheliftlinkagewith aheaderattached.Headerwilldropsuddenly ifclevispinisdrivenout,causingheader damageand/orpersonalinjury.

11.Observethefollowingprecautionsbeforeadjustingorlubricatingtheheader.

• Disengagetheheaderdrive.

• Lowertheheadertotheground,orraise theheaderandengagetheheaderlocks.

• Stoptheengineandengagetheparking brakebeforeleavingthecab.

• Reinstallandcloseallshieldingbefore operatingtheunit.

12.Donotattempttoclean,lubricate,oradjust themachinewhileitisrunning.

13.Replacedamagedknives,knifehardwareor discsimmediatelytopreventanaccident.

14.Thebottomleadingedgeofworndiscscan becomeverysharp.Wearglovestoprevent injury.

INTRODUCTION

The750HDdiscaugerheaderisadiscmower-conditionerdesignedtobeusedwiththeHW345,HW365, H8060,andtheH8080self-propelledwindrowers.The 770HDdiscaugerheaderisdesignedtobeusedonly withtheHW365andH8080.Thetwooperatetogether asanintegralunit.Thevalvesandcylindersforlifting andtiltingtheheaderaremountedonthewindrower, asareallthehydrauliccontrols.

The750HDheadercontains12discmowingmodules,whilethe770HDheadercontains14discmowingmodules.Anaugerfeedsthecroptotwomolded rubberinter-meshingchevronconditionerrolls.Ahydraulicpumponthewindrowersuppliesallpowerfor theheader.

Thewindrowercontrolsthespeedoftheheaderineither automaticormanualmode.Intheautomaticmode,the speedisheldconstantregardlessofthespeedofthe windrower.Inthemanualmode,thespeedvarieswith thewindrowerenginespeed.Themodeissetfromthe windrowercab.

NOTE:Onthisequipment,leftandrightaredeterminedbystandingbehindtheunit,lookinginthedirectionoftravel.

PRODUCTIDENTIFICATIONNUMBER(PIN)

ThePINplate,1,forthediscmower-conditioneris locatedatthebackontheleftsideoftheframe.

JACKASSEMBLY

Therearetwojackstandsbuiltintotheheader,1,one oneachsideoftheunit.

SHIELDING

NOTE: Beforeraisingeitherofthefrontshields,unhookthecutterbarshieldskirtspringsnaps,1,atthe skirtoverlaps.Besurethattheskirtsarereattached beforeusingtheheaderagain.

Whenraised,thefrontshieldsareheldinplacebya lever,1.Theleverautomaticallyspringsintothelock astheshieldisraised.Tolowertheshield,release theleverbypushingittotheside.

WARNING

Closeshieldspriortooperatingthemachineto preventdamagetotheshield.Runningtheheader withadamagedshieldmayresultinbodilyinjury fromflyingobjects.Failuretocomplycouldresult indeathorseriousinjury.

SECTION00-GENERALINFORMATION-CHAPTER1

Therightsideshieldcanbeliftedbyreleasingtwo rubberstraps,1,onthefrontandrearoftheshield, andpivotingtheshieldupward.Lifttheshieldpart wayandremovethelatchrod,2,fromtheslotinthe shield.Raisetheshieldfullyandhooktherodintothe slotinthetopoftheshieldtosupporttheshield.

LIGHTS

Therearetwowarninglightsontheheader,1.One oneachoutboardside.Theseactashazardflashers andturnsignallights.Theyareoperatedfromthecab ofthewindrower.

STORINGTHEHEADER

Whenpreparingtheheaderforstorage:

1.Cleantheheaderthoroughly.Removeanybuildup ofdebrisandanywrappedmaterialfromthecutter barandtheconditionerrolls.

2.Lubricatetheheader.

3.Draintheoilfromallgearboxesandrefillwith cleanoilofthecorrectspecificationtothecorrect level.Runtheheaderforafewminutes.

4.Inspectforwornorbrokenparts.Replacewith genuinefactoryparts.

5.Relieverollpressure.

6.Removetensionfromtherolldrivebelt.

7.Cleanrustedorabradedareasandtouchupwith factorypaint.Spraycansareavailablefromyour authorizeddealer.

8.Storetheheaderwhereitisnotexposedto weather.

HEADER

(HW345,H8060/750HD,HW365, H8080/750HD,HW365,H8080/770HD)

Installation

1.Lowertheliftarmsasmuchaspossible.Applya liberalcoatingofmulti-purposegreasetothelift cups,1.

2.Drivethetractoruptotheheadersothelifting cupsontheliftarmsaredirectlybelowthelift bushings,2.Raisetheliftarmsuntiltheyarefirmly inplace.Raisethejackstandsintothestorage position.

3.Removethepinholdingtheheadertiltcylinder inthestoragepositionandconnectittothe headerusingaclevispin.Onthe770HDheader thecylinderonlyhasoneholetoconnecttoon theheader.Whentheheadertiltchannelis installedintherearwardholes,1,thisprovides acuttingrangeof1-1/2inchto3inch.When installedintheforwardholes,2,thecutting rangeis1inchto2-1/4inch.Theforwardholes onthetiltchannelshouldbeusedformost crops.

IMPORTANT:Donotusethishole,3,tostoreapin whiletheheaderisattached.Damagetothetiltcylinder andbaseunitwillresult.

4.Retractthetiltcylinderorraisetheheaderto causetheslidinglinktomovetotheoperating position.Installtheretainingpin,4.Connectthe wireharnessfortheheaderspeedsensorand flashers.

5.Startthetractor,raisethearmsuptothemaximumraisedpositionandengagetheheaderlock bypullingrearwardonthehandle.Theheader lock,1,islocatedontheleftfrontcornerofthe windrower.Thehandleisshownhereinthe lockedposition.

WARNING

Alwaysengageheaderliftlockrodsorchannels whenworkingaroundorunderaraisedheader andwhentransportingmachineonapublicroad. Failuretocomplycouldresultindeathorserious injury.

6.Installtheheaderliftarmpins,1.

7.Disengagetheheaderliftlockasshown.

8.Cleanthehydrauliccouplersandconnectthe headerdrivemotorhydraulichosestothequick couplersonthewindrowerframe.

NOTE:Thetractorenginewillneedtobeshutoffin ordertoconnectthehydraulichoses.

9.Adjusttheheaderflotationbeforeusingthe headerinthefield.Refertotractoroperatorís manualforsettingtheheaderfloatation.

Removal

1.Disconnecttheheaderdrivemotorhosesfrom thewindroweratthequickcouplers.

2.Connectthemaleconnectorfromtheleftheader motortothefemaleconnectorfromtheright headermotorandconnectthefemaleconnector fromtheleftmotortothemaleconnectorfromthe rightmotor.Thiswillensurethatthecouplersremaincleanandwillprovideafluidpathtoprevent motorsealfailure.

WARNING

Alwaysengageheaderliftlockrodsorchannels whenworkingaroundorunderaraisedheader andwhentransportingmachineonapublicroad. Failuretocomplycouldresultindeathorserious injury.

DMC002

10032276

3.Startthewindrowerandraisetheheaderallthe way.

4.Engagetheheaderlock,1,locatedontheleft frontcornerofthewindrower.Thehandleis shownhereinthelockedposition.

5.Removetheheaderliftarmpins,1.

6.Lowerthejackstands,2.

7.Disengagetheheaderliftlockasshown.

8.Lowertheheadersotheskidshoesandjackstands areontheground.Adjustthejackstandssotheskid shoescontactthegroundwhilethejackstandsare stillseveralinchesofftheground.Thiswillcausethe headertorockbackwardasitislowered,taking forceoffoftheheadertiltcylinder.

9.Disconnectthewireharnessfortheflashersand theheaderspeedsensor,1.

10.Removetheheadertiltcylinderretainingpin,1,on thewindrowertoallowfreemotionofthecylinder. Extendorretracttheheadertiltcylinderasrequired torelievethepressureonpin,2,connectingthe cylindertotheheader.

11.Securethetiltcylinderintheraisedpositionby insertingpin,2,throughthecylinderandmount at3.

IMPORTANT:Donotusehole,3,tostoreapinwhile theheaderisattached.damagetothetiltcylinder andbaseunitwillresult.

12.Lowertheliftarmsasmuchaspossible.

13.Backthetractorawayfromtheheader.Besure theliftingcups,1,directlybelowtheliftbushings, 2,havedroppedaway.

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ELECTRICALCONNECTIONS

Therearetwoelectricalconnectorsontheheader.The speedsensorconnectorontheheaderhastwowires attachedandjoinstotheconnectoronthewindrower withtwowires.Theotherconnectorhastwowiresand isforthelightsontheheader.Theconnectoronthe headerisconnectedatlocation,1.

HYDRAULICCONNECTIONS

Sixhydraulichosesconnecttheheadertothewindrower.Therearetwosupplyhoses,twooilreturn hosesandtwomotorcasedrainhoses.Thesehoses areconnectedtothewindroweratthefrontframe.

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SPECIFICATIONS

750HDDISCAUGERHEADER

OverallWidth4836mm(15ft9-1/4in) .............................................................

Weight(includingcontainer)1864kg(4100lb)

HeaderDriveHydraulic,variableflow-Forward-345bar(5000psi)

Hydraulic,variableflow-Reverse-400bar(5800psi)

Header

Flotation Vertical&radial

Cuttingwidth4680mm(15ft4-1/4in)

TransportHeighttobottomofskidshoewith18.4x26tires686mm(27in)

TransportHeighttobottomofskidshoewith23.1x26tires754mm(29.6in) .........................

CutterBar

Type

No.ofdiscs

Modular

12counter-rotating

Knivesperdisc 2 .............................................................................

Disccuttingdiameter500mm(19.7in) ..........................................................

DiscdriveBevelgearsinsealedmodules

DiscspeedVariablefromapprox.1600to3100rpm

Cuttingheightwith18.4x26tires21.6-66mm(0.85-2.6in)

Cuttingheightwith23.1x26tires20.3-55.8mm(0.80-2.2in)

Cutterbaranglewith18.4x26tiresAdjustablefrom-1_ to-12_ hydraulicallycontrolled

Cutterbaranglewith23.1x26tiresAdjustablefrom-2_ to-13_ hydraulicallycontrolled

Auger

Type

Undershot,fullfloating

Augerdiameter 508mm(20in)

Augerfloatingrange43.6mm(1.7in)

Augerflighting 127mm(5in)

AugerspeedVariablewithheaderspeed ........................................................

Conditioner

TypeIntermeshingrolls,high-contactrolls. Drive4HBV-belt,enclosedgearswithU-jointdrivestoupperandlowerrolls. RolltypeMoldedrubberwithintermeshingchevrondesign,high-contactchevron.

Rolllength 2591mm(102in) ...................................................................

Rolldiameter 264mm(10-3/8in) ...............................................................

RollspeedVariablewithheaderspeed

RollpressureTorsionbar,singlecrankadjustment

CropdischargeAdjustablefrom2438-965mm(96-38in)

770HDDISCAUGERHEADER

OverallWidth

Weight

5542mm(18ft2in)

2273kg(5000lb)

HeaderDriveHydraulic,variableflow-Forward-345bar(5000psi) ...................................

Hydraulic,variableflow-Reverse-400bar(5800psi)

Header

Flotation Vertical&radial ......................................................................

Cuttingwidth 5480mm(18in) ..................................................................

TransportHeighttobottomofskidshoewith23.1x26tires754mm(29.6in) .........................

CutterBar Type Modular No.ofdiscs 14 ...............................................................................

Knivesperdisc 2 .............................................................................

Disccuttingdiameter500mm(19.7in) ..........................................................

DiscdriveBevelgearsinsealedmodules

DiscspeedVariablefromapprox.1600to3100rpm

Cuttingheightwith23.1x26tires20.3-55.8mm(0.80-2.2in)

Cutterbarangle23.1x26tiresAdjustablefrom-2_ to-13_ hydraulicallycontrolled

Auger Type

Undershot,fullfloating Augerdiameter 508mm(20in)

Augerfloatingrange43.6mm(1.7in)

Augerflighting-Reinforced127mm(5in)

AugerspeedVariablewithheaderspeed

Conditioner

TypesIntermeshingrolls,high-contactrolls. Drive4HBV-belt,enclosedgearswithU-jointdrivestoupperandlowerrolls. RolltypesMoldedrubberwithintermeshingchevrondesign,high-contactchevron. .....................

Rolllength 2591mm(102in) ...................................................................

Rolldiameter 264mm(10-3/8in) ...............................................................

RollspeedVariablewithheaderspeed

RollpressureTorsionbar,singlecrankadjustment CropdischargeAdjustablefrom2438-965mm(96-38in)

HARDWARETORQUEVALUES

Checkthetightnessofhardwareperiodically.

Usethefollowingchartstodeterminethecorrect torquewhenchecking,adjustingorreplacing hardwareonthetractor.

IMPORTANT: DONOTusethevalueslistedinthe chartsifadifferenttorquevalueortightening procedureisspecifiedintheismanualforaspecific application.Torquevalueslistedareforgeneraluse only.

Installalockwasheronallboltsunlessalocknutor jamnutisspecified.

Installaflatwasheratallslottedholesunlessa carriageboltorflangedheadboltisspecified.

Makesurefastenerthreadsarecleanandnot damaged.

NOTE: Atorquewrenchisnecessarytoproperly torquehardware.

M41.7(15)*2.2(19)*2.6(23)*3.4(30)*3.7(33)*4.8(42)*2.3(20)*

M65.8(51)*7.6(67)*8.9(79)*12(102)*13(115)*17(150)*7.8(69)*

M814(124)*18(159)*22(195)*28(248)*31(274)*40(354)*19(169)*

M1028(21)36(27)43(32)56(41)61(45)79(58)38(28)

M1249(36)63(46)75(55)97(72)107(79)138(102)66(49)

M16121(89)158(117)186(137)240(177)266(196)344(254)164(121)

M20237(175)307(226)375(277)485(358)519(383)671(495)330(243)

M24411(303)531(392)648(478)839(619)897(662)1160(855)572(422)

NOTE:Torquevaluesshownwith*areinchpounds.

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