Farr HD8625 - I. DAILY INSPECTION & MAINTENANCE CHECKLIST (POWER TONG)

3.22
hD8625 8-
5
/
8
” 35K Tong
Technical Manual
MainTenance
I. DAILY INSPECTION & MAINTENANCE CHECKLIST (POWER TONG)
Farrrecommendsthatthefollowinginspectionandmaintenanceproceduresbeperformedbeforeeachuse,andatleastonceperday
whenthetongisinsteadyuse,intheorderinwhichtheyarelisted.
1.
Rotatecageplate/rotarygearuntiltheopeningintherotarygearfacestowardstherearofthetong.
3.
Performaninitialwashofthetonginordertoremovethemajorityofdirtandgreasebuild-up.Ensureadequatecontainmentis
inplacetopreventenvironmentalcontaminationfromresidualhydraulicfluidanddirtygrease.
4.
Removetheaccesspanelonthesideofthetongdirectlyadjacenttotheshiftermechanism.
5.
Useaflashlighttoperformavisualinspectionofthegeartrainthroughtheaccesspanelandtheopeningoftherotarygear.If
geardamageorchipsofmetalareseen,thetongshouldberemovedfromserviceandoverhauledtoavoidfurtherdamage.
Replaceaccesspanelwheninspectioniscomplete.
6.
Performavisualinspectionofallfastenersandprotrudingbodypieces(example:hydraulicvalvemounts,inlet&outletline
supports,tonglegs,shifterhandlepivotlugs).Tightenorreplacelooseormissingfasteners.Farrrecommendsthatdamaged
ormissingbodypartsberepairedorreplaced.
7.
Inspectthejawsanddies.Inspectthejawrollerpinsforsignsofdamage-replacepinsifnecessary.Ifthepinsareweldedin
place,replacetheentirejawassembly.Ensurediesaresecureinthejaw-replaceworndiesifnecessary.Ensurethatthejaw
rollersrotatefreely.Checktoensurethesizeoftheloadedjawsmatchthesizeofcasingorpipeyouarerunning.
8.
Performavisualinspectionofallliftingpoints-ifvisibledamageisseen,includingcracks,brokenlugs,distortedmetal,etc.
replacedamagedpart(s)beforeplacingtonginservice.Alsoinspectallchains,masterlinks,andturnbuckles-again,ifany
damageisnotedreplacethedamagedpart(s)beforeplacingthetonginservice.
9.
Inspecttongforsignsofprematurewear,ormovingpartsthatarerubbing(baremetalwherethereusedtobepaintisagood
indicationofwear.
10.
Inspectbackingpin(s).Ifcracked,broken,orbentit(they)mustbereplaced.
11.
Inspecttopandbottombrakebandlinings-replaceifnecessary.Unequalwearofthebrakebandsindicatesthatthebrake
bandtensionis notevenlyadjusted.Refer tothemaintenancesectionofthemanual forinstructionsonproperly adjusting
brakebands.
12.
Performavisualinspectionofallhydrauliclines.Replaceflexiblelinesiftheyappeartobecracked,fatigued,orhavevisible
signsofwearfromcontactwitharigidobject.
DO NOT PERFORM ANY FURTHER ACTIONS OR MAINTENANCE WHILE THE TONG IS CONNECT-
ED TO ANY HYDRAULIC POWER SUPPLY. FARR RECOMMENDS THAT ALL HYDRAULIC LINES
ARE FULLY DISCONNECTED, AND RESIDUAL HYDRAULIC PRESSURE IS BLED OFF. ENSURE
ADEQUATE CONTAINMENT IS IN PLACE TO PREVENT ENVIRONMENTAL CONTAMINATION FROM
RESIDUAL HYDRAULIC FLUID.
2.
DePressurIze HyDraulIC system In PreParatIon for maIntenanCe:
1) Rotatethetongtothe“openthroat”position.Ensuretongandbackupdoors(ifequipped)areclosed.Fullyextendthe
liftcylinder
2) De-energizethepowerunit.
3) RepeatedlyactuatethetongmotorcontrolvalveleverINBOTHDIRECTIONStodissipateanyresidualpressureinthe
valveandmotor.
4) RemovethehydraulicSUPPLYlinefromtheequipment.
5) RepeatedlyactuatetheremainingcontrolvalveleversINBOTHDIRECTIONStodissipateanyresidualpressureinthe
remainderofthehydrauliccontrolsystem.
7) DisconnectthehydraulicRETURNlinefromtheequipment.
8) Disconnectremaininghosessuchascasedrains.
HYDRAULIC PRESSURES AS HIGH AS OPERATING PRESSURE MAY REMAIN TRAPPED IN SMALL
AREAS OF THE EQUIPMENT. ENSURE ALL MAINTENANCE IS CARRIED OUT BY A QUALIFIED
SERVICE TECHNICIAN, AND THAT ADEQUATE PERSONAL PROTECTIVE EQUIPMENT IS USED TO
GUARD AGAINST PRESSURE INJURIES