Farr KT5500 - Page 63

KT5500 5-
1
/
2
” Tong & CLInCHER® BaCKup
SECTIon ConTEnTS
3.25
TECHnICaL ManuaL
MaInTEnanCE
28.
Re-energizepowerunitandextendallhydrauliccylinders.Inspectcylinderrodsforsignsofmechanicaldamage,flak-
ing,orrust.Farrrecommendsthatdamagedcylindersbereplaced.
29.
Rotatetonginlowgearfor5minuteswhilemonitoringpressurizedsealsandhydrauliclines.Ifaseal,line,orfitting
beginstoleakwhiletongisrotating,itmustbereplacedbeforetheequipmentisreturnedtoservice.
30.
Rotatetonginhighgearfor5minuteswhilemonitoringtemperatureoftopandbottombearingcaps.Ifthebearingcaps
arehottothetouch(higherthanapproximately50
o
C)replacetheapplicablebearings.Likewiseifthetongismaking
unusualnoisescheckfordamagedbearings(seeMaintenanceManualforallbearinglocations).
31.
Installloadcell.Ifusingatensionloadcell,performavisualinspectionandreplaceanycracked,broken,ordistorted
componentsincludinglinksandchains.Ifusingacompressionloadcell,replaceanycomponentthathasbeencrushed
orotherwisedistortedthroughcompression.
32.
Ifapplicable,inspecttheloadcellanchorpins(tensionloadcellonly).Replacetheanchorpinsifcrackingormetal
distortionisseen.
33.
Ifapplicable,theweldsecuringthesingleloadcellanchortothebridgebarmainplatemustbeinspected(compression
loadcellonly).Iftheintegrityoftheweldhasbeencompromised,thetongmustberemovedfromserviceuntiltheweld
isrepaired.Theloadcellbeamwillneedtobedisconnectedandremovedsotheweldisvisible.Beforere-installingthe
beam,liberallygreasetheanchorpinbeforereinsertingintotheloadcellbeam.
34.
Inspectloadcellfordamageorsignsofstress.Checkoillevelinloadcellandfillifnecessary(refertotechnicalmanual
Section7orSection8).
35.
Whilerotatingthecageplate,ensurethatthejawsproperlycam.Ifthejawsdonotcamproperly,thebrakebands
needtobetightened.IncrementallyadjustboththetopandbottombrakebandsEQUALLYuntilpropercamactionis
achieved.Refertothemaintenancesectionofthemanualforinstructionsonproperlyadjustingbrakebands.
36.
Performafullfunctionaltestofthetongincluding,ifapplicable,backupcomponents,liftcylinder,andfloatframecom-
ponents.Reportandcorrectanyhydraulicleaksfromthehydraulicvalvebank,orfromanyhydrauliccylindersthat
areused.
37.
Testsafetydoorfeature(ifequipped).Beginrotatingthetongatlowspeed,andopenthetongdoor(s).Ifrotationdoes
notimmediatelystop,thisisanindicationthatthesafetydoormechanismisnotoperatingcorrectlyandthetongmust
beremovedfromserviceuntilthemechanismisrepaired.Repeatthetestwhileoperatingthetongintheoppositedirec-
tion.Ifthesafetydoorisoperatingcorrectly,cageplaterotationwillnotbeinhibitedoncethedoorisclosedandlatched.
NEVER OPERATE YOUR EQUIPMENT WITH A BYPASSED OR MALFUNCTIONING SAFETY
DOOR
38.
Farrrecommendsthat ananti-corrosiveagentsuchasTectyl®506beappliedtoallexternalunpaintedsurfaces
(andchainslings)EXCEPTcylinderrods,jawrollers,androtarygearcammingsurfaces.Refertomanufacturerdata
sheetsforproperapplicationandsafetyinformation.
Once all of the above maintenance checklist items have been satisfactorily completed the tool may
be returned to service.