广柴8320船用柴油机供货技术条件详解

广柴8320船用柴油机供货技术条件详解DeliveryTechnicalConditionsForModel8320ZCd-8MarineDieselEngine8320-JH115H-01GuangzhouDieselEngineFactorycontents1InGeneral2SpecificationsandMainTechnicalParameters3TechnicalConditionsandNotes4DeliveryScope5Packing6FactoryWarranty1InGeneral1.1Thisdeliveryconditionsspecifythemainspecifications,technicalconditions,deliveryscope,packing,factorywarranty,spareparts,etc.forthe8320ZCd-8dieselengine.1.2Whenex-factory,theenginesshallbeinaccordancewiththetechnicalrequirementsstipulatedinthisdeliveryconditions.1.3Forthedetailsofthefittingdataandtheex-factorytestrecords,seetheTechnicalCertificate.1.4Fortheparticularrequirementsfromusers,suchastotakeouttheoutputpowerfromthefrontendoftheengine,tomodifythedimensionsofconnectingtheflywheelwiththecoupling,touseGeislingerflexiblecoupling,toinstalltheremotecontroldevice,etc,theymustbestipulatedinthedeliverycontract.1.5Thetorsionalcalculationmustbecarriedoutwhenprojectingthepropulsionplantinordertosatisfytherequirementofsafetyandoperation.Ifthefrontendoutputshaftisapplied,theequivalentsystemforthetorsionalcalculationshalladdrelativemasspointstoensuretheaccuracyofcalculation.1.6Whentheengineisusedasthemainpropulsionplantwithahead&asternclutchgearbox,itisnotpermittedtoengagetheclutchgearboxwiththeengineatminimumidlingspeedtoavoidtheenginestopsautomaticallyduetothesharpreductionofthespeed.Thespeedforpre-engagementshallbedecidedaccordingtotherequirementsforequipmentsoftheshaftsystem.Therecommendedspeedforpre-engagementis55~60%oftheratedspeedoftheengine.1.7Thesupplieroftheremotesystemmustsetsuitablepre-engagementspeedfunctionfullyconsideringtherequirementforcontrolsystemfromtheengineandahead&asternclutchgearboxtoensuretheenginecanoperatenormallyduringtheoperationofengagementanddirectionchange.1.8Incasethattheequipmentitemanditsquantitysuppliedbythefactorydifferfromthesameshowninthistechnicalconditionsdocument,thedeliverycontractwillprevail.1.9GuangzhouDieselEngineFactoryholdstherighttoreplacethepartsorcomponentslistedinthisScopeofDeliverywiththeonesofthesameperformanceorthebetterwhenitisnecessary.1SpecificationsandMainTechnicalParametersModelofdieselengine8320ZCd-8TypeFourstroke,inline,watercooled,directlyinjected,turbocharged,irreversiblemarinemaindieselenginewithanintercooler.No.ofcylinders8Cylinderboremm320Pistonstrokemm440Ratedoutputkw2206Ratedspeedr/min525Overloadrating(1hour)kw2426.6Speedatoverloadoperationr/min542DisplacementofpistonL282.9Specificfueloilconsumptiong/kW.h189Specificlubeoilconsumptiong/kW.h1.2SpecificairconsumptionKg/s5.0Minimumidlingspeedr/min210Compressionratio13:1MeanpistonspeedM/s7.7MeaneffectivepressureMPa1.782MaximumcombustionpressureMPa≤13.5Cylinderexhausttemperature(dieseloil)℃≤450Cylinderexhausttemperature(HFO)℃≤430ModelofturbochargerVTR304-11SupercharingtypePulsesuperchargingwithinter-coolingSuperchargepressureMPa0.31±0.02Longtermallowablespeedoftheturbochargerr/min＜24000Max.allowablespeedoftheturbochargerr/min＜27000Max.operatingtemperatureofturbine℃＜640ExhaustgascounterpressureMPa0.00294ModelofaircoolerKLQ153HCoolingareaM2153Temperatureofinletwaterofaircooler℃32CoolingtypeClosedSpeedofseawaterpumprpm2352Speedoffreshwaterpumprpm2352DisplacementofseawaterpumpM3/h120DisplacementoffreshwaterpumpM3/h100Liftofseawaterpumpm18Liftoffreshwaterpumpm18Freshwatertemperatureatengineinlet℃60to70Freshwatertemperatureatengineoutlet℃＜85ModeloffreshwatercoolerBLG30.50BCoolingareaoffreshwatercoolerM230Modeloffreshwatertemperatureregulator℃LZFT100GII2(60to75)Brandoflubeoil40CDlubeoilfortheengineoperatedondieseloil4030highlybasiclubeoilfortheengineoperatedonHFOFormoflubricationPressurelubricatingandsplashlubricatingLubeoilpressureMPa0.45to0.55LubeoilpressureforcamshaftMPa0.1to0.3LubeoilpressurepumptypeGeartypeSpeedoflubeoilpumprpm1547DisplacementoflubeoilpressurepumpM3/h56LubeoilsuctionpumpProvidedbytheuserModelofLubeoilfinefilterSBL125BIT(264mesh/inch)Lubeoiltemperatureatengineinlet℃50to65Lubeoiltemperatureatengineoutlet℃65to80ModeloflubeoilcoolerBLG45.55ACoolingareaoflubeoilcoolerM245Modeloflubeoiltemperatureregulator℃LZFT80GII2(55to70)Brandoffueloil0#dieseloilGB252-1994180cSt/50℃HFOFuelsupplyadvanceangle°13+3beforeT.D.CBoreoftheplungermm26Strokeoftheplungermm19.75Specificationofnozzle9×0.45R×130°OpeningpressureforfuelinjectorMPa30FuelfinefiltertypeSBL40IITFilternetmeshoffuelfinefilter400mesh/inchFuelstrainertypeSBL40IITFilternetmeshoffuelfinefilter202mesh/inchFueloilpressureatfuelinjectionpumpinletMPa0.1to0.15fordieseloil0.4to0.5forHFOFueloilviscosityatfuelinjectionpumpinletcSt12to14forHFOGovernormodelYT111VGGovernortypeMechanical-hydraulictypeRateofspeedfluctuationυ≤1.5%whenn≥50%neυ≤2%whenn<50%neInstantaneousspeedregulation≤10%Permanentspeedregulation≤5%StartingtypeBycompressedairStartingairbottlepressureMPa2.94CapacityofstartingairbottleL300×2Min.startingpressureMPa0.9Firingorder1-4-7-6-8-5-2-3Inletvalveopening70°beforeT.D.CInletvalveclosing45°afterB.D.CExhaustvalveopening55°beforeB.D.CExhaustvalveclosing50°afterT.D.CRotationdirection(viewedontheflywheel)ClockwiseOveralldimension(L×W×H)mm6010×1853×3480Heightabovetheaxisofthecrankshaftmm2675Depthbelowtheaxisofthecrankshaftmm705Min.heightabovetheaxisofthecrankshaftformm2750dismantlingorassemblingpistonandconnectingrodNetweightoftheenginekg30000AlarmatlubeoilpressurelowMPa0.20Shut-downoftheengineatlubeoilpressuretoolowMPa0.12Alarmatlubeoiltemperaturehigh℃75Alarmatfreshwatertemperaturehigh℃85AlarmforthefuelleakageofhighpressurefueloilpipeHighlevelOver-speedlimitertypeCentrifugal,hydraulictypeActionspeedofover-speedlimiterrpm588to6042TechnicalConditionsandNotesThereferenceconditionsforthecontinuousoutputpower,speedandSFOC,accordingtothestandardofCB/T3254.1-94,areasfollows:Atmosphericpressure：P0＝0.1MPa；Ambienttemperature：T0＝298K(25℃)；Relativehumidity：Φ0＝30％；Coolingwatertemperaturebeforechargingaircooler：TC0＝25℃。3.2TheSFOCoftheengineisbasedonthefueloillowcaloricvalueof42700kJ/kg.3.3Thereferenceconditionsfortheunrestrictednavigationareaengineaccordingto2001(CCS)areasfollows:Absoluteatmosphericpressure：PX＝0.1MPa；Ambienttemperature：TX＝318K(45℃)；Relativehumidity：ΦX＝60％;Coolingwatertemperaturebeforechargingaircooler：Tcx=305K(32℃)Underthereferenceconditionssaidabove,thepoweroftheengineis2206kWwiththeenginespeedof525r/minandtheexhausttemperatureattheoutletofeachcylinder≤450℃.3.4Theoverloadrating(1hour)isreferredas110%ofratedoutputprovidingthattheengineisoperatedforonehourevery12hours.3.5Whentheengineisoperatedatthecontinuousoutputpower,thedifferencebetweenthefollowingoperatingparametersincylindersshallnotbemorethanthefollowingstipulatedvalue:Thecompressedairpressure：2.5％Max.combustionpressure：4.0％Exhausttemperatureattheoutletofcylinder：5.0％3.6Theengineunderthecoolstatuswiththeambienttemperaturenotlessthan5℃shallbestartedupwithin10seconds.3.7Theairbottlewithitsairpressureof2.94MPacanbeusedforstartingtheengineformorethan6timeswithoutfillinguptheairbottlewithair.3.8Theengineisallowedtobeoperatedattheloadoflessthan20%ofratedoutputforashorttimewhentheturbochargerfailstooperateduetoitsdefault.Butatthattime,thecoveroftheairinletchambershouldberemoved.3.9Itshallbeallowedthattheengineistobeoperatedattheloadofnotmorethan50%ofratedoutputforashorttimewhenoneofthecylindersisoutoffiring.3.10UsersshalltakethetorsionalcalculationfortheshaftingwithtorsionalcalculationdataoftheenginefromGDFandthecalculatingresultshallagreetotherequirementofCCS.GDFcandothatfortheuserwithextracharge.3.11ThecostforpackingandCCSinspectionwillbeextracharged.4ScopeofDelivery:4.1.Theattachmentsinstalledonthemodel8320ZCd-8dieselengineNo.DRG./No.DescriptionQ’tyRemark1VTR304-11Turbocharger12YT111GVHydraulicgovernor13TypeSZMB-2GTachogenerator24SBL40ⅡTFuelfinefilter1400mesh/inch5320.27.00Over-speedtripdevice168320.71E.00BLubeoilpump1Q＞56m3/h7YI320-601A-00Freshwaterpump1Q=100m3/h8KLQ153HAircooler1GEA98320.130.00BAlltheflangesandjointsforconnectingexternalpipestotheengine110YI320-602-00Seawaterpump1Q=120m3/h11320.23.00Oilqualitylimiter112320.26.00Startspeeder113320.29D.00Emergencystopdevice114320B-200000Injectionpump815Q8UL-00G2Injector84.2Theattachmentssuppliedwiththemodel8320ZCd-8dieselengine:No.DRG./No.DescriptionQ’tyRemark1BLG30.50BFreshwatercoolerwithacoolingareaof30m212BLG45.55ALubeoilcoolerwithacoolingareaof30m213SBL125BITLubeoilfilter1264mesh/inch4LZFT100GII2Regulatingdeviceforfreshwatertemperature1Beactiveatthefreshwatertemperatureof60~750C5LZFT80GII2Regulatingdeviceforlubeoiltemperature1Beactiveatthelubeoiltemperatureof55~700C6CP300Startingairbottle278320.221A.00TurbochargeroutsideConnectedpipeassembly18SBL40ⅡTFuelcoarsefilter1202mesh/inch9320.73.00ALubeoilpressure-regulatingvalve110320.74.00ALubeoilcoarsefilter111320.47.00BLowpressureairbottle112I-100Non-returnvalve113300.146.00Interlockmechanismforbarringflywheelandstartingengine114320.57Y.01Marinealarmbox14.3Listofsparepartssuppliedwiththeengine:Thesparepartssuppliedwiththeengine(1)No.Drg.No.DescriptionQty.Remark1Assembledcylinderheadincludingcylinderheadassembly(320.01.00B),testvalveandsafetyvalvecomplete(320.03.00),startingvalvecomplete(320.53.00).1set2320.01.09Valvecap23320.01.11BInletvalve24320.01.11HExhaustvalve25320.01.13Valvecollar4pairs6320.01.15Valveguidesleeve47320.01.28BInletvalveouterspring4Forinletvalves8320.01.29BInletvalveinnerspring49320.02.03Cylinderheadnut8108320.02.05Cylinderheadstud8118320.02.25Cylinderheadsealring412320.02.26Cylinderlinersealring413320.02.27Cylinderlinerwatersealring6148320.02.40Cylinderlinerassembly1setHonereticulatepatterninside15320.03.10Safetyvalveassembly1set16320.05.04Thrustblock1pair17320.05.10320.05.20Upper,bottomshellformainbearing1pairs18320.14E.10320.14E.20Upper,bottomshellforbigendofconnectingrod2pairs19320.10.03Valvetappethead420320.10.04Adjustablepressscrew421320.10.05Nut422320.11.04Oil-retainingdisk223320.11.07Spring224320.11.304CRolleroftheinjectiontappet225320.11.105DRollerofthevalvetappet226320.11.106CRollerbush427320.11.107Rollerpin428320.11.40APushrodassembly229320.13E.02Firstpistonring430320.13E.03Secondpistonring431320.13.20AScraperring432320.13E.07Thirdpistonring433320.14E.01Longerconnectingrodbolt434320.14E.02Connectingrodshortbolt435320.14E.06Copperbush236320.52.08320.52.09Valve1Sulphurisedtogether37320.53.00Startingvalveassembly1set38320.53.01Copperwasher639320.60.60CHighpressurefueloilassembly4set40320B-200005Plungerspring241320B-200200Plungermatingpartsassembly242320B-200100Fueldeliveryvalveassembly2set43Q8U-07S1Springforinjector244Q8U-09AWasher645ZU30100B1Injectionneedlevalvematingpartsassembly2set9×0.45×130°46320.70.04ASpring1478320.92.03ASandwichgasket1488320.92.02ASandwichgasket3498320.92.01ASandwichgasket350320.92.03Sandwichgasket251320.92.05Bolt852320.92.04Nut8538320.92.13AShortBolt854W8320.92.110AExpansionjoints1set55320.92.09Ballwasher456W8320.92.120AExpansionjoints1set57320.31.06ARubberdiaphragm258320.70.510BFilterscreenassembly*1set*320.70.510BFilterscreenassemblywillreplacethe320.70.510AFilterscreenassemblyafter100hoursoperationofthedieselengineThesparepartssuppliedwiththeengine(2)No.DesignationSpecsStandardQ’tyApplication1Copperwasher10Material:T3inconformitywiththestandardGB500-751021483208422651866272730283321OtypeRubberSealring7×1.9Material:RubberI-2InconformityWiththestandardGB1235-751Forspeedcontroller28×1.92Forinstrumentpanel39×1.92Forspeedcontroller,valuefixer,one-waythrottleshuttlevalve410×1.93Forone-waythrottle512×1.910Forthestartingvalve,thereversingvalveandtheexplosionsafetydoor614×2.41Forlubeoilpressureregulatingvalve715×2.41Forspeedcontroller816×2.43Forthestartingvalve,thefueloilpipe,drainerandhydraulictensioningpump918×2.43Fortheone-waythrottlevalve1020×2.42Fortheoillimiteddevice,thevaluefixer1122×2.43Forthefuelpipes,theabsorber1228×3.51Forthespeedcontroller1330×3.112Fortheengineblock1431×3.51Forthemainstartingvalve1536×3.51Fortheoillimiteddevice1630×3.554Fortheinjector17O-RubberSealring40×3.1Material:RubberI-2InconformityWiththestandardGB1235-751Forthevaluefixer1840×3.51Forthestartingaccelerator1935.5×3.554Fortheinjectors2046×3.51Formainstartingvalve2150×3.14Forthefuelinjectiontappetassembly2251.1×2.65G2Forinjectionpumps2360×5.3G4Forinjectionpumps2447.5×3.556Forinjectors2555×3.16Forthetappetrodandthemainairfilter2655×3.51Fortheoillimiteddevice2763×3.14Forthestartingvalve2870×3.11Forthemainstartingvalve2972×5.71Forthemainstartingvalve3075×3.11Fortheairwaterseparator3185×3.16Forthetappetrod,bedplate3290×3.11Fortheairdistributor170×5.71Fortheairdistributor33180×5.73Fortheexplosionsafetydoor34210×5.71Fortheairdistributor35240×8.61Forthelubeoilcoarsefilter36350×8.64Forairinletpipe3732×3.52Forcoolingsystem38J-shapeoilseal130×160×16HG4-338-661Forthefrontendhorsepoweroutputshaft4.4.ListofspecialtoolssuppliedwiththeengineNo.DRG./No.DescriptionQty.Remark1320.100.01Spannerforflywheelstudsandnuts12320.100.03Socketforcylinderheadnut13320.100.04Spannerforcylinderheadnut14320.100.05Spannerforconnectingrodstuds15320.100.07Studofsupport66320.100.08Toolfordismantlingdeliveryvalvepressseat17320.100.09Spannerforinjectorconnectingpipeandscrewofrockerarmretainer18320.100.11Squareholeboxspannerforconnectingrodstuds19320.100.12Spannerfornutofthe1#injectionpump’shighpressurefuelpipe110320.100.13Spannerfornutofthe2#injectionpump’shighpressurefuelpipe111320.100.14Handleforpumpingfuelbyinjectionpump112320.100.15ToolfordismantlingHydraulicpumpoftensioner113320.100.16Spannerforroundnutofcamshaftgearwheel114320.100.17Squareholeboxspannerformainbearingnut115320.100.18Injectortestbracket116320.100.19Toolforliftingupcylinderhead117320.100.21Spannerforinjectornut’shousing118320.100.10Toolfordismantlingcamshaftgearwheel119320.100.20AToolforliftinguppistons120320.100.30Toolforassemblingpistons121320.100.40Drawerfordismantlingtheimpellerofthewaterpump1TheDRG.No.ofthepressingplateis320.100.1022320.100.50Toolfordismantlingandassemblingvalveconicalrings123320.100.60Toolforlappingvalves124320.100.70Torquespannerfortighteningboltsornutsandmeasuringthetighteningtorque125320.100.80Toolfordismantlingpistonpincirclet126320.100.90Toolfordismantlingcylinderliner1278320.100.110Toolforliftingupengine128320.100.120AToolfordismantlingconnectingrodcover129320.100.130AToolfordismantlingmainbearingcover130320.100.140Toolfordismantlingmainbearingbottomshells131320.100.150Toolfordismantlinginjectorspring132320.100.160Testerforcheckinginjectionadvancedangle133320.100.170Stopperformountingbearingshell134320.100.180Toolforassemblingandremovalofpistonring135320.100.190Toolfordismantlinginjectors136320.102.00AHydraulictensionerfortierod137320.103A.00Hydraulictensioningoilpump138320.104.00ATensionerforcylinderheadstud139320.66.00Injectortestpump14.5.Listofinstrumentsandalarmdevicessuppliedwiththeengine:No.DescriptionSpecsMountingposition&applicationQty.Remark1TypeSZD-2GTachometer0~800r/minMountedontheinstrumentpanelformeasuringtheenginespeed32XMDW-21Cdigitaltemperatureautomaticmeasurer0~800℃Mountedontheproperpositionintheengineroomformeasuringexhausttemperature1setIncluding11thermo-couplesofwhichtwoarespareparts3TypeWSS-311YDoublemetalthermocouple0~100℃L=75mmFormeasuringtheoutletwaterTemperatureofeachcylinder9Including1sparepart4TypeWSS-311YDoublemetalthermocouple0~100℃L=100mmFormeasuringtheinletfreshwateroftheengineandoutletwaterofturbocharger3Including1sparepart5TypeWSS-311YDoublemetalthermocouple0~100℃L=150mmFormeasuringtheairtemperatureafterinter-stagecooler2Including1sparepart6TypeWCY401Doublemetalthermocouple0~600℃L=100mmMountedonexhaustmainpipe17TypeWYZ-01Pressuretypethermometer0~125℃Mountedontheinstrumentpanelformeasuringtemperatureoflubeoilandfreshwater3Including1sparepart8TypeYC-60ZT0~1Marinepressuregauge1MPaMountedontheinstrumentpanelformeasuringthelubeoilpressurebeforeandafterthefilter29TypeYC-60ZT0~4Marinepressuregauge4MPaMountedontheinstrumentpanelformeasuringthepressureofthestartingairbottle110TypeYC-60ZT0~0.4Marinepressuregauge0.40MPaMountedontheinstrumentpanelformeasuringthepressureofseawaterandthefreshwater211TypeYC-60ZT0~0.25Marinepressuregauge0.25MPaMountedontheinstrumentpanelformeasuringthepressureofthesuperchargedairpressure112TypeKGmeasuringtoolforcrankshaft75~150Formeasuringthedifferenceofthedistancebetweenthetwoneighboringarmsofthecrankshaft113TypeY-150Pressuregauge40MPaForinjectortestpump114TypeY-150Pressuregauge160MPaForthehydraulictensioneroilpump115TypeDY-2maxPressuregauge16MPaFormeasuringexplosionpressureincylinders1set16PressurerelayYWK-50-CForlowlubeoilpressurealarm1Contactclosingpressure≤0.2MPa17PressurerelayYWK-50-CForstoppingtheengineduetolowlubeoilpressure1Contactclosingpressure≤0.12MPa18TemperaturerelayJWG-K-AForhighlubeoiltemperaturealarm1Contactclosingtemperature≥75℃19TemperaturerelayJWG-K-AForhighcoolingwatertemperaturealarm1Contactclosingtemperature≥85℃20AlarmbellYLK-24Foralarming121AlarmsignalboxForalarming1Withaindicatinglightandaswitchattached22TypeYN60ZT/2.5Vibration-resistingpressuregauge0~1.6MPaMountedontheinstrumentpanelformeasuringthepressureoffueloil14.6.ListofdrawingsanddocumentssuppliedwiththeengineNo.DRG./No.DescriptionQty.Remark1Operationandmaintenancemanualformodel8320dieselengine128320-JH115H-01Technicalconditionofdeliveryformodel8320ZCd-8dieselengine138320-TC102-00Atlasofsystempipingandoveralldimensionsofauxiliaryequipmentfor8320dieselengine14Ex-factoryTechnicaldocumentsfortheturbocharger1copyProvidedbythemanufacturer5Technicalcertification16Orderingcatalogofpartsfor320seriesdieselengine17PointsforattentiontoHeavyfueloperationforseries320engines188320-60H.YL1PrinciplelayoutforHFOsystem198320-70H.YL1Principlelayoutforlubeoilsystem14.7Forspareparts,instruments,specialtoolsandtechnicaldocumentsfortheturbocharger,pleaseseethe“ex-factorytechnicaldocumentsfortheturbocharger”.4.8TheaddedsparepartsforunrestrictednavigationareaOnrequestofthecontract,ifthecustomerplacestheorderonthebasisofunrestrictednavigationarea,thefollowingpartsshallbeorderedseparatelywithextracharge.No.DRG./No.DescriptionQty.Remark1320.13E.00Pistonassembly12320.14E.00Connectingrodassembly13320B-200000Fuelinjectionpump14Q8UL-00G2Injectorassembly15320.01.09Valvecap26320.01.11BInletvalve17320.01.11HExhaustvalve18320.01.28BInletvalveouterspring29320.01.29BInletvalveinnerspring210320.01.15Valveguidesleeve25Packing5.1Spareparts,instruments,accessories,specialtoolsanddrawingsanddocumentssuppliedwiththeenginearepackedinspecialpackingcontainerwithmeasuresforpreventingpartsorcomponentsfromslidinginspecialpackingcontainer.DieselenginewillbecoveredwithwaterproofbagfortheshipmentofrackcontainerThefollowingitemsshallbemarkedonthepackingcontainer:0.1ThenameandaddressoftheFactory0.2Themodelandnameoftheengine0.3Thedateofex-factory0.4Length×Width×Height(mm)0.5Totalweight(kg)0.6Thenameandaddressoftheconsignee0.7“NOUPSIDEDOWN”,“UPWARDS”,“HANDLEWITHCARE”,“NOHUMIDITY”and“LIFTINGFROMHERE”,etc.6Factorywarranty6.1Beforedelivery,theengineshallbetestedonthetest-bedinthefactoryaccordingtotheEx-factoryTestSpecificationsfor8320ZCd-8MarineDieselEnginewiththealltheperformanceparametersinconformitywiththerequirementsinthisdeliverytechnicalconditionsandthequalityofallpartsandcomponentsisinconformitywiththeregulationsofthedrawingsandtechnicalrequirementsofassembly.6.2Beforedelivery,theengineisconditioned,oil-sealedandpackedinagoodcondition.Theguaranteeperiodofoilsealis12monthsfromthedeliverydateprovidedthattheuserstransportandstoretheengineaccordingtotheOperationandMaintenanceManualforModel8320DieselEngine.GuangzhouDieselEngineFactorywillberesponsibleforrepairingandreplacetherust-eatenpartsduetotheincorrectoilsealintheguaranteeperiodofoilseal.6.3Thedamagedpartsand/orcomponentsduetothepoormanufacturingandassemblyqualityshallbereplacedbythefactoryfreeofchargeunderthefollowingconditionsthattheuserobeysthestipulationsintheOperationandMaintenanceManualforModel8320DieselEngineandthestipulationsinthePointsforAttentiontoHeavyFuelOilOperationforSeries320Engineswithin18monthsfromthedateofex-factoryoftheengineandtheoperatingtimeisnotexceeded2000hours,andthattheoperatingdatamustberecorded.6.4Thefactoryshallnotberesponsibleforthepartsand/orcomponentsdamagedduetothefollowingcauses:(a)Naturalwear(b)Poorst