riverhawk IM-186 User manual

Repairs – Rentals
Field Service
215ClintonRoad
NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]
RevisionE
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INSTRUCTIONMANUALIM‐186
ForGasTurbineTensionedStudsandNuts
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Fr.7HTurbinetoLoadCouplingGE372A1793P003,P004
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 
GEPower&Water
GENERALELECTRICCOMPANY
MLI: ____ OF ____
DATE
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CUSTOMER'SINFORMATIONBOX
CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL
ISSUED:
THISDOCUMENTSHALLBEREVISEDINITSENTIRETY.ALLSHEETSOFTHISDOCUMENTARE
THESAMEREVISIONLEVELASINDICATEDINTHISVENDORSUPPLIEDDRAWINGAPPLIQUE.
REV
373A4016
GEDRAWINGNUMBER
VENDORSUPPLIED
THISDOCUMENTISFILEDUNDERTHEGEDRAWINGNUMBER.
GENOTTOREVISE.GEREVISIONLEVELISSHOWNONTHISAPPLIQUE.
GESIGNATURES
CHECKED:
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TheRiverhawkCompanyreservestherighttoupdatethisdocumentwithoutdisseminationornotice.The
latestrevisionmaybeobtainedbycontactingRiverhawkCompanyorthruwww.riverhawk.com.

InstructionManualIM‐186
CUSTOMER'SINFORMATIONBOX
CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL

215ClintonRoad
NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]

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REV
373A4016
GEDRAWINGNUMBER
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RevisionE
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TableofContents
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Section Description PageNumber
1.0 CautionsandSafetyWarnings 3
2.0 Scope 4
3.0 QuickCheck‐List 4
4.0 GeneralPreparations 7
5.0 PreparationofHardware 8
6.0 NutandStudAssembly 10
7.0 AssemblyofHydraulicTensionerEquipment 10
8.0 AssemblyofTensioneronStud 11
9.0 StudPullingandTensioning 13
10.0 ThreadLocking 14
11.0 Stud/NutRemoval 15
12.0 FrequentlyAskedQuestions 16
13.0 RevisionHistory 18
AppendixA1 ECDeclarationofConformity 19
AppendixA2 UKCADeclarationofConformity 20
 FiguresandIllustrations 21
 20‐BoltTensioningPatternRecordSheet 23
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InstructionManualIM‐186
CUSTOMER'SINFORMATIONBOX
CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL

215ClintonRoad
NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]

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REV
373A4016
GEDRAWINGNUMBER
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RevisionE
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1.0CautionsandSafetyWarnings
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WARNING
Impropertooluseandthefailuretofollowthecorrectproceduresaretheprimaryrootcauses
oftoolsfailuresandpersonalinjuries.Alackoftrainingorexperiencecanleadtoincorrect
hardwareinstallationorincorrecttooluse.Onlytrainedoperatorswithcareful,deliberate
actionsshouldusehydraulictensioners.ContactRiverhawkCompanywithanytrainingneeds.
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WARNING
Riskofhighpressurehydraulicfluidinjection.Riverhawktoolsoperateunderhighpressure.
Thoroughlyinspectallhosesandconnectionsfordamageorleakspriortousingthisequipment.
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CAUTION
Personalinjuryandequipmentdamagecanoccurifthepullerscrewisnotsecurelyengaged
withthetaperedthreadofthestud.Properengagementisachievedwhenthepullerscrewis
tightinthestudandtheTensionerAssemblyisfreetorotate.

WARNING
Theproperpersonalprotectiveequipmentmustbewornatalltimes.Riverhawkrecommends
ataminimum,safetyglasses,longsleeveshirt,hardhat,heavyworkgloves,andsteeltoe
shoes.
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WARNING
ThesafetycageMUSTbeinplaceandhandskeptoutofdesignatedareasatalltimeswhenthe
pullertoolispressurizedotherwisepersonalinjurycanoccur.
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CAUTION
DONOTEXCEEDTHEMAXIMUMPRESSUREVIBROSCRIBEDONTHEPULLERBODY.Excessive
pressurecandamagethestudandthepullerscrew.

WARNING
FireHazard;DONOTheatwhenthepullerassemblyisinplace.Personalinjuryorequipment
damagemayoccur.UseofanOxy‐Acetylenetorchisnotrecommended.
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NOTICE
DonotusemorethreadlockingcompoundthanspecifiedorthenutmaybeVERYdifficultto
removeatdisassembly.


InstructionManualIM‐186
CUSTOMER'SINFORMATIONBOX
CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL

215ClintonRoad
NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]
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REV
373A4016
GEDRAWINGNUMBER
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RevisionE
Page4of23
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CAUTION
DONOTEXCEEDTHEMAXIMUMPRESSUREVIBROSCRIBEDONTHEPULLERBODY.Excessive
pressurecandamagethestudandpullerscrew
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Note:Donotoverextendthestud.Overextensioncancausethepistontolooseitssealand
leakoil.
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Note:Beforethreadingthepullerscrewintothestud,carefullycheckthecleanlinessofboth
thestud'sandthepullerscrew'sconicalthreads.Applyalightcoatofcleanturbineoilora
spraylubricanttothepullerscrew.Donotuse“NeverSeize”ontheconicalthreads.This
procedurewilleaseassemblyandassurepositivematingofthethreadsbeforetightening.
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2.0 Scope
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Thisdocumentdescribestheproceduretobeusedtoinstallstudsandnutssuppliedby
RiverhawkCompanyintheflangesattheturbine/couplingandcoupling/generatorconnections.
Thishardwareisdepictedonthefollowingdrawingsthesedrawingsaswellasthetooling
drawingsformapartofthismanual.

  HF‐1554
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3.0QuickChecklist
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ThefollowingchecklistisintendedasasummaryofthestepsneededtousetheRiverhawk‐
suppliedequipment.Newpersonnelorthoseexperiencedpersonnelwhohavenotusedthe
Riverhawkequipmentrecentlyareencouragedtoreadtheentiremanual.
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EQUIPMENTINSPECTION
□ Checkoillevelinhydraulicpump.
□ Checkairpressureat80psi[5.5bar]minimum.(Forair‐drivenpumps)
□ Checkhydraulichosefordamage.
□ Testpump.

InstructionManualIM‐186
CUSTOMER'SINFORMATIONBOX
CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL

215ClintonRoad
NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]
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REV
373A4016
GEDRAWINGNUMBER
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RevisionE
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□Inspecttensionerforanydamage.
NUTANDSTUDPREPARATION
□Inspectstudandnutsforanydamage.
□Measurestudlength.
□Cleanthestudsandnuts.
□Installstudsandnuts(off‐center)intotheflange.
□Setstick‐outdimensiononthecouplingsideoftheflange.
□Handtightenallstuds.
□Verifystick‐outmeasurement(VERYIMPORTANT)

Tensioning(Boltinstallation)
□Matchthetensionersetuptotheflangejoint.
□Applyalightcoatofcleanturbineoilorspraylubricanttothepullerscrew.DONOTUSE
“NEVERSEIZE”ONTHECONICALTHREADS.
□Slidespannerringoverthepullerscrew.
□Mountthetensioneronthestudinflange.
□Installspannerringontonut.
□Insert1/2”hexAllenwrenchintothebacksideofthestud.
□Tightenthepullerscrew.
□Backoffpullerscrew1/2turn.

InstructionManualIM‐186
CUSTOMER'SINFORMATIONBOX
CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL

215ClintonRoad
NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]

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REV
373A4016
GEDRAWINGNUMBER
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RevisionE
Page6of23
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□Retightenthepullerscrewandleavetight.DONOTBACKOFFPULLERSCREW.
□Bleedthetensioner.DoNOTbleedtensioneroffofastud!Damagetothetoolwill
result!
□Tensionto50%.Consultmanualforcorrectpressure.
□Usethepinwrenchinspannerringtotightennut.
□Releasepressure,movetonextstudinpattern.
□Repeatabovestepsatfinalpressure.
□Measurefinalstudlengthandrecordonstretchdatasheets.Calculatestretch.
□Torquenuts'setscrews.

Detensioning(Studremoval)
□ Loosennuts'setscrews
□ Inspectandcleanstuds'conicalthreads.DonotcontinueuntilALLdebrisisremoved
fromthethreads!Donottrytousethetensionertoremoveadamagedstud!
□ Applyalightcoatofcleanturbineoilorspraylubricanttothepullerscrew.DONOTUSE
“NEVERSEIZE”ONTHECONICALTHREADS.
□ Slidespannerringoverthepullerscrew.
□ Mountthetensioneronthestud.
□ Installspannerringintonut.
□ Tightenthepullerscrew.
□ Backoffpullerscrew1/2aturn.

InstructionManualIM‐186
CUSTOMER'SINFORMATIONBOX
CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL

215ClintonRoad
NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]


REV
373A4016
GEDRAWINGNUMBER
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RevisionE
Page7of23
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□ Retightenthepullerscrewandleavetight.DONOTBACKOFFPULLERSCREW.
□ Bleedthetensioner.DoNOTbleedtensioneroffofastud!Damagetothetoolwill
result!
□ Applyfinalpressure.
□Loosennutwiththespannerringandpinwrench.
□Movetonextstudinpattern


4.0GeneralPreparations

Readandunderstandallinstructionsbeforeinstallingandtensioningstuds

4.1MachinePreparation

Theflangetobetensionedmustbefullyclosedpriortopositioningofstudsintheflanges.
Turningtheshaftsoftheturbineandthegeneratorarenotrequired,butmaybeuseful.Also,it
willbeadvantageoustoremoveasmanyobstructionsaspossiblefromtheflangearea,suchas
speedprobes,shippingplates,andconduit.

4.2Hardware–Balance

 Hardwareissuppliedasweightbalancedsets
 StudsandNutsareinterchangeablewithinsets
 Donotintermixsets
 Saveweightcertificationsuppliedwitheachsetforthepurchaseofspares

4.3Tensioner–CareandHandling

 Whennotinuse,thetensionershallbemaintainedinacleanenvironmentandallcaps
andplugsforhydraulicopeningsandfittingsmustbeinplace.
 UseISO32gradeoil.
 Wheninuse,thetensionershallbeprotectedfromsandandgrit.
 Longtermstorage–coattensionerwithoil,returntooriginalcontainer,sealcontainer
andprotectfrommoisture.

InstructionManualIM‐186
CUSTOMER'SINFORMATIONBOX
CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL

215ClintonRoad
NewHartford,NY13413
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 Shipment–coattensionerwithoilandshipinoriginalcontainer.

4.4 HandTools

Severalhandwrenchesandmicrometerswillberequiredtoperforminstallationand
measurementofthestuds:

5/8”wrench
1"wrench
1"Socket&ImpactWrench
AsetofAllenWrenches
3’–4’BreakerBar
14”to15”micrometerorcaliper

4.5SpecialTools

HydraulicTensionerKit: HT‐2981HydraulicTensioner
(referenceGE359B2589)

HydraulicPumpKit: AP‐0532Air‐operatedHydraulicPump
(recommended)
(referenceGE359B2502)


5.0PreparationofHardware

5.1NutPreparation

Fornewinstallations,thenutsshouldcomesealedfromthefactoryandwillneednocleaning.

Previouslyinstallednutsrequirecleaning:asfollows:Wirebrushusingapetroleumbased
solventtoremoveanyforeignmaterialontheexternalsurfacesandthreads.

Ifpreviousinstallationsemployedathread‐lockingcompound,whichwillbevisibleasagrayish‐
greenresidue,removeasmuchofthiscompoundaspossible.

Donotapplythreadlubricantstothethreads.

Finishthecleaningprocessbyrinsinginavolatilesolventsuchasacetoneandallowtodry.

InstructionManualIM‐186
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
5.2StudPreparation

Fornewinstallations,thestudsshouldcomesealedfromthefactoryandwillneednocleaning

5.2.1StudCleaning‐OldInstallations

Previouslyinstalledstudsmayrequirecleaning.Cleanconicalthreadsshouldhaveabrightand
shinyappearance.

Ifcleaningisrequired,followthesesteps:

1. Blowoutthethreadswithcompressedairtoremoveloosedebrisanddryconical
threads.Donotapplyasolventorothercleaningsolutiontothethreadsasthismaychemically
attackthestud.

2. UseStudCleaningKit,GT‐4253orasimilar1"diameterBrasspowerbrush.


PictureofBrassPowerBrush

3. Insertthebrushintoanelectricdrillandsetdrilltoruninacounterclockwisedirection
athighspeed.

4. Workthedrillinacircularmotionwhilemovingthebrushinandouttocleanallofthe
threads.Trynottoholdthebrushinoneplacetoolong,soasnottoremovethestud's
protectivecoating.

5. Blowoutthethreadswithcompressedairtoremovelooseneddebris.

6. Visuallyinspectthreadsforcleanliness.Threadsshouldbebrightandshiny.

7. Repeatifanydirtcanbeseeninthethreads.

8. Inspectthreadsforanydamagethatmayhavebeencausedbypreviousinstallation.

Donotapplythreadlubricantstothethreads.


InstructionManualIM‐186
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CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL
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Finishthecleaningprocessbyrinsinginavolatilesolventsuchasacetoneandallowtodry.

5.3StudLengthMeasurement

Measureandrecordtheinitiallengthsofthestuds.Thefollowingrecommendationswill
improveyourresults.

 Plantostartandfinishanyflangeinthesameday.
 Studsandflangemustbeatthesametemperature.
 Numbereachstudwithamarker.
 Markthelocationofmeasurementonstudendwithapermanentmarker.
 Measureeachstudtonearest0.001inch.
 Recordeachmeasurementonthesuppliedcharts.
 Donotallowthemicrometertosetinthesun


6.0StudandNutAssembly

RefertoHardwareAssemblyDrawing(HF‐1554)listedinSect.2.0ofthismanual.
1. Assemblecylindricalnuttothetaperedthreadend(PullEnd)ofthestud.
2. SlidetheassemblyintotheflangefromthecouplingsideasshowninFigures1&2then
installtheotherCylindricalnutonthebackside(thecylindricalnutsareidentical).
3. Adjustthestud/nutassemblysothatthestudprotrudesfromthefaceofthe
cylindricalnuttheamountdepictedonthehardwaredrawing(HF‐1554)TYPICALLY
0.250”TURBINEEND.SETTINGTHISPROTRUSIONOFSTUDTONUTISCRITICALFOR
PROPERTENSIONEROPERATION.Handtightentheassemblytoasnugfit.SeePhotos1
&2foraviewoftheassemblyofstudsandnutsintheflangepriortotensioning.


7.0AssemblyofHydraulicTensionerEquipment

7.1KitAssembly

Assemblethehydraulicpumpwithitshosetothepullertoolandbleedthesystemofairper
followinginstructionsinparagraph6.3(MUSTBEONASTUD).Photo3showshoseconnected
tomanifoldoftensioner.

7.1.1Fittings


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Makesurebothmaleandfemalepartsarecleanandfreeofdebris;seeFigure4forfitting
configuration.Holdfemalepartsecurelywhentighteningsoastopreventdamagetoadjacent
tubing.Iffittingleaks,firsttryretighteningasneeded.Ifleakingcontinuesthendisassemble
andcheckforscratchesordebrisontheseatingconicalsurfaces.Cleanasrequired.Replace
plasticcapswhenfinishedwithtooling.

7.2Pump

Thepumpkitisshippedfullofhydraulicoil.Thepumpreservoircapissealedforshipment.To
useturncaptotheventposition.Topreventoilspillageclosecapwhennotinuse,during
storageandshipment.LostoilshouldbereplacedwithEnerpacHydraulicOil.ISO32.Mineral
Oilmaybesubstituted,ifnecessary.

7.3BleedingHydraulicSystem

FollowthetensionerassemblyinstructionsofSection8.0

TOAVOIDFAILURE,ENSURESAFETYANDPROPEROPERATIONTHETENSIONERASSEMBLY
MUSTBEMOUNTEDONTHESTUDBEFOREBLEEDINGTHESYSTEMANDTENSIONINGBEGINS.
ThetensionerhasfourportsseeFig.3,oneforpressurizing,twoforbleedingthesystemanda
fourthpressurereliefport.Tofacilitatebleeding,startbyfirstmountingthetensioneratthe9
o’clockstudposition,whichwillcriticallyplacethebleedportsintheiruppermostposition.In
addition,makesurethatthepumpisalwayssituatedbelowthetensionerassembly.

Thepullertoolisequippedwith5/8”[16mm]hexconedstembleederfittingsinstalledinthe
bleederports.Withthesetwofittingsloosenedsimultaneously,strokethepumprepeatedly
untilthestreamsofoilexitingthetoolfromeachportarefreeofair,thenretightenthefittings.

Note:Thehoseisstiff;useofthistoolingcanbesimplifiedbytemporarilymountingthepuller
toolononestudpriortofinaltighteningoffittings.Thiswillreducethetendencyforthe
fittingstoloosenduringuse.


8.0AssemblyofTensioneronStud

8.1HandlingoftheTensioner

Note:Beforethreadingthepullerscrewintothestud,carefullycheckthecleanlinessofboth
thestud'sandthepullerscrew'sconicalthreads.Applyalightcoatofcleanturbineoilora

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spraylubricanttothepullerscrew.Donotuse“NeverSeize”ontheconicalthreads.This
procedurewilleaseassemblyandassurepositivematingofthethreadsbeforetightening.

RefertoTensionerAssemblydrawingandFigure3forviewsofthetensionertoflange
mounting.Alltensioningwillbeperformedonthecouplingsideoftheflangeconnections.

1. Cleanpullerscrewandcheckforanydebrisanddents.

2. Pullerscrewshouldbefreetorotateandmovebackandforth.

3. Seambetweencylindersclosedtightly.

4. Inspecttensionerguardforanysignsofdamage.Bentguardsshouldbereplaced.Also,
besuretherubberpadisinplaceontheendoftheguard,ifmissing,replace.

Thisassemblyhasthefollowingfeatures,whichshouldmakestudtensioningsafeandeasy:
 Thesafetycageisintegral(bolted)tothepullertool
 Thehydraulicpistonisspringloadedtoretract

Assemblysequenceisasfollows:

1. Placethespannerringoverthepullerscrewonthetensioner.
2. Applyalightcoatofcleanturbineoiloraspraylubricanttothepullerscrew.Donotuse
“NeverSeize”ontheconicalthreads.
3. Placeandholdthetensionerassemblyovertheendofthestudtobetightened.See
photos3&4.
4. Holdthestudsteadywitha1/2”hexkeywrenchandlightlytightenthepullerscrewinto
theconicalthreadofthestudwithawrench.
5. Slidethepullerscrewintothetaperedthreadofthestudandhandtighten.Besurenot
tocrossthreadassembly.
6. Placethespannerringpinsintothecylindricalnutlocatedonthestud.
7. AtthispointtheTensionerAssemblyMUSTBEFREETOROTATE,thepullerscrewmust
betightinthestud.

Ifthepullertoolisnotfreetorotatewhenthepullerscrewistightthen,either(1)thestudis
notproperlypositionedintheflangeandthenutsmustberepositionedsothatthestudis
shiftedslightlymoreonthepullertoolside,or(2)Thetensionerisdamagedandmustbe
returnedforrepair.

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
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NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]


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GEDRAWINGNUMBER
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

Repositioningthestudcanbedoneasfollows:
1. Slightlyloosenthepullerscrew.
2. Backthenutoppositepullertooloffabout1/2turn.
3. Tightenthepullerscrewsidenuttotakeuptheslack.
4. Retightenthepullerscrewperaboveandcheckforloosenessoftool.

Note:Donotoverextendthestud.Overextensioncancausethepistontolooseitssealand
leakoil.

CAUTION
Personalinjuryandequipmentdamagecanoccurifthepullerscrewisnotsecurelyengaged
withthetaperedthreadofthestud.Properengagementisachievedwhenthepullerscrewis
tightinthestudandtheTensionerAssemblyisfreetorotate.


9.0StudPullingandTensioning

Thestudswillbetensionedintwosteps,at50%pressureandatfinalpressure.Followthe
tensioningsequenceforeachflangejointasdefinedonthedatasheetsfoundattheendofthis
manual

WARNING
ThesafetycageMUSTbeinplaceandhandskeptoutofdesignatedareasatalltimeswhenthe
tensionerispressurizedotherwisepersonalinjurycanoccur.

9.1Tensioningat50%pressure

Afterthetensionerisproperlyinstalledapplyhydraulicpressuretothetool.Bringthepressure
tothe50%levelinaccordancewiththefollowingtable.

FlangePosition StudSize 50%Pressure 50%Stretch
TurbinetoCoupling 2.246"
[57.05mm]
9000psi
[620bar]
Donotmeasure
Donotuse

TurnthecylindricalnutusingtheappropriatespannerringandpinwrenchasdepictedinFigure
3untilitbottomsontheflange.


InstructionManualIM‐186
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9.2RemovingtheTensionerfromanInstalledStud

Thetensionerremovalistoaccomplishedbythefollowssteps:
1. Releasethepullertoolpressurebyopeningthevalveonthepump(HandPumpVersion
MP‐0130).Leavethevalveopen.Thisisautomaticontheair‐operatedhydraulicpump.
2. Unscrewthepullerscrewusingawrench
3. Tappingthewrenchwithahammermaybenecessarytoloosenthepullerscrew.
4. Movethetooltothenextstud/nutassemblytobetensioned,followingthe
sequence/patternasdefinedonthesupplieddatasheets.

9.3TensioningatFinalPressure

Repeatthepullingandtighteningprocedurestatedaboveatfullpressure.Measuresthelength
ofthestudsafterallhavebeentensioned.Thefinalpressureandrequiredstretchvaluesare
listedinthefollowingtable

FlangePosition StudSize FinalPressure FinalStretch
TurbinetoCoupling 2.246"
[57.05mm]
17000psi
[1170bar]
0.034"‐0.036"
[0.86mm‐0.91mm]

Note:Beforethreadingthepullerscrewintothestud,carefullycheckthecleanlinessofboth
thestud'sandthepullerscrew'sconicalthreads.Applyalightcoatofcleanturbineoilora
spraylubricanttothepullerscrew.Donotuse“NeverSeize”ontheconicalthreads.This
procedurewilleaseassemblyandassurepositivematingofthethreadsbeforetightening.

CAUTION
DONOTEXCEEDTHEMAXIMUMPRESSUREVIBROSCRIBEDONTHEPULLERBODY.Excessive
pressurecandamagethestudandpullerscrew.

Excessivestretchvariationorlowstretchvaluescanbecorrectedbyretensioningallorselected
studstothepressurevaluesstatedabove.Havefinalstretchvaluesapprovedbythesupervisor
responsiblefortheinstallation.


10.0ThreadLocking

Oncepullingandtensioningiscompletedallstudnutsmustbelockedinposition.


InstructionManualIM‐186
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CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL

215ClintonRoad
NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]
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
10.1ThreadLockingUsingaMechanicalLockingDevice

MechanicalLocknutshavetwosetscrewslocatedinthetopface,seeFigure6.Beforethreading
thenutontothestudchecktobecertainthatthesetscrewsarefreetoturn.Oncethenutis
seatedtorquethesetscrewstothevaluesspecifiedinthefollowingtable.Whenseatedand
torquedtothevaluesspecifiedtheloadcreatedbythesetscrewdisplacesthethreadofthe
nutintheareaofthewebcreatingthedesiredlockingaction.

NutDiameter SetScrewSize Torque
2‐1/4"
[58mm] 1/4"‐28UN 80in∙lbs‐90in∙lbs
[9.0N∙m–10.1N∙m]


11.0Stud/NutRemoval

Sections10.1describestheprocedurestobefollowedinremovingnutsthathavebeen
installedwiththemechanicallockingfeature.

11.1RemovalofAssemblieswithMechanicalLocknuts

Forthoseassemblieswhichhavebeenlockedusingmechanicallocknuts,removalis
accomplishedasfollows:

1. Usingawirebrushandshopaircleantheinternaltaperedthreadofthestudtoremoveany
debris/depositswhichmayhaveaccumulatedduringservice.(seesection5.2.1)
2. WithanAllen‐wrenchloosenthetwolockingsetscrewsbutdonotremovefromthenut
seeFigure6.
3. InstallthepullertooltothestudasdescribedinSection6.0.Applytheappropriate
hydraulicpressurepertheTablebelowandusingthespannerringandspanner/pin
wrenchesshowninFigure7loosenthenut,thenreleasethepressureandremovethe
pullertool.

FlangeStudSizePressure

Turbine/Coupling2.246in.17,000psi
[57.05mm][1170bar]



InstructionManualIM‐186
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CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL
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Tel:+13157684855
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
12.0FrequentlyAskedQuestions

Thissectioncontainssomefrequentlyaskedquestionsandproblems.Ifthestepslistedheredo
notsolveyourproblem,contacttheRiverhawkCompanythruourwebsite,email,orphonecall.

Q: Atensionerhaspulleditselfoutofthestud'sconicalthreads.CanIcontinueusinga
tensioneronthisstud?

A: No.Boththetensionerandthestudmayhavebeendamaged.Ifthestudistensioned,a
NutBusterrepairkit,fromRiverhawk,mustbeusedtoremovethedamagedstudby
drillingoutthenut.Riverhawkcansupplyareplacementstudandnutbasedonthe
initialweightcertificationsuppliedwiththehardwareset(seesection4.2).The
damagedtensionershouldalsobereturnedtoRiverhawkforinspectionandrepair.


Q: Thehydraulictensionerhasbeentakenuptoitsfinalpressure.Thefinalstretchlength
isshortofthefinalstretchtarget.Whatisthenextstep?

A: Donotincreasethehydraulicpressure.Checkifthehydraulicpumpissettotheright
pressure.Installthetensionerandre‐pressurizethetensionertothefinalpressurethen
recheckthestretchmeasurement.Ifthestretchvalueisstillshort,removethestud
fromtheholeandre‐measurethestud'sinitiallengththentrytoinstallthestudagain.


Q: Thehydraulictensionerhasbeentakenuptoitsfinalpressure.Thefinalstretchlength
islargerthanthefinalstretchtarget.Whatisthenextstep?

A: Removethestudfromthebolthole.Checkifthehydraulicpumpissettotheright
pressure.Re‐measurethestud'sinitiallengththentrytoinstallthestudagain.


Q: Isthereaneasierwaytosupportormovethetensioneraroundthecouplingshaft?

A: Usetwostraps.Onearoundthecouplingshaftandtheotherattachtoanyoverhead
support.Strapsmustbeslackduringmountingtensionertostudandduringtensioning.




InstructionManualIM‐186
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Tel:+13157684855
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
Q: Thetensionerisatitsfinalpressure,butthenutcannotbeloosen.

A: Ifthenutscannotbeloosenedatthefinalpressure,continuallyincreasingthepressure
willnothelpandcanbedangerousandinsomecasesmakeithardertoremovethenut.
Checkthenuttoseeifitssetscrewshavebeenloosened.Checkforandremoveany
corrosionaroundthenut'sthreads.


Q: HowdoIcleantheconicalthreadsonastud?

A: Theconicalthreadsarebestcleanedusingaspiralwound brassbrushinadrillas
describedinsection5.2.1


Q: Duringtheinitialstepsofremovingatensionedstud,thestick‐outlengthisfoundtobe
wrong.

A: Donotproceed.ContactRiverhawkforassistance.Withthewrongstick‐outlength,the
hydraulictensionerhasalimitedstrokeandmaynotworkproperlyandcanbe
damaged.


Q: Thehydraulicpumpappearstobeleaking.

A: Checkthehoseconnectiontothehydraulicpump.Ifthe1/4"highpressurefittingisnot
assembledcorrectlyitmaylooklikethepumpisleaking.Iftheproblemcontinues,it
maybenecessarytoopenthepumpkit.ContactRiverhawkforguidance.


Q: Thehydraulichosehasacollaronitthatcan'tbemovedbyhand

A: Thecollarissometimesheldinplacewithathreadlockingcompound.Thispreventsthe
collarfrommovingtooeasily.Itmaybenecessarytoadjustthiscollarwithasetofvise‐
grippliers.Becarefultonotstripthethreadsoffthetubeorhoseend.



InstructionManualIM‐186
CUSTOMER'SINFORMATIONBOX
CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL

215ClintonRoad
NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]


REV
373A4016
GEDRAWINGNUMBER

RevisionE
Page18of23

13.0RevisionHistory

Revision
Letter
EffectiveDate Description
E May13,2022 UpdatedECDeclarationofConformity;AddedUKCA
DeclarationofConformity
D Jan15,2015 Updatedsection1.0,4.3,and15.0
C Jun13,2014 AddedECDeclarationofConformity
B Jun10,2009 Addedturbineoilandremoved“NeverSeize”from
sections1.0,3.0,8.1,and9.3
A Mar25,2009 Addedsections3and13
‐ Mar16,2006 Released




InstructionManualIM‐186
CUSTOMER'SINFORMATIONBOX
CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL

215ClintonRoad
NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]


REV
373A4016
GEDRAWINGNUMBER

RevisionE
Page19of23

AppendixA1

ECDeclarationofConformity


Manufacturer: RiverhawkCompany
Address: 215ClintonRoad
NewHartford,NY13413,USA


Thehydraulicpumpandbolttensioningtooldescribedinthismanualareusedforinstallingand
applyingtensiontolargeboltsthatarespecificallydesignedbyRiverhawkCompanytobe
tensionedhydraulically.

AllapplicablesectionsofEuropeanDirective2006/42/ECformachineryhavebeenappliedand
fulfilledinthedesignandmanufactureofthehydraulicpumpandbolttensioningtool
describedinthismanual.ReferencealsoISO12100:2010,ISO4413:2010,andISO4414:2010.

Furthermore,thisequipmenthasbeenmanufacturedundertheRiverhawkqualitysystemper
ENISO9001:2015

ConsulttheDeclarationofConformanceincludedwiththeshipmentofthisequipmentthat
identifiestheauthorizedRiverhawkrepresentative,applicableserialnumbers,andappropriate
signature.


InstructionManualIM‐186
CUSTOMER'SINFORMATIONBOX
CONTENTSAREINDEPENDENTOFRIVERHAWKDOCUMENTCONTROL

215ClintonRoad
NewHartford,NY13413
Tel:+13157684855
Fax:+13157684941
Email:[email protected]


REV
373A4016
GEDRAWINGNUMBER

RevisionE
Page20of23

AppendixA2

UKCADeclarationofConformity


Manufacturer: RiverhawkCompany
Address: 215ClintonRoad
NewHartford,NY13413,USA


Thehydraulicpumpandbolttensioningtooldescribedinthismanualareusedforinstallingand
applyingtensiontolargeboltsthatarespecificallydesignedbyRiverhawkCompanytobe
tensionedhydraulically.

AllapplicablesectionsofSupplyofMachinery(Safety)2008havebeenappliedandfulfilledin
thedesignandmanufactureofthehydraulicpumpandbolttensioningtooldescribedinthis
manual.ReferencealsoISO12100:2010,ISO4413:2010,andISO4414:2010.

Furthermore,thisequipmenthasbeenmanufacturedundertheRiverhawkqualitysystemper
ENISO9001:2015

ConsulttheDeclarationofConformanceincludedwiththeshipmentofthisequipmentthat
identifiestheauthorizedRiverhawkrepresentative,applicableserialnumbers,andappropriate
signature.

