Farr KT5500 - Page 48

KT5500 5-
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” Tong & CLInCHER® BaCKup
SECTIon ConTEnTS
3.10
TECHnICaL ManuaL
14. Removedoorassemblybyremovingthedoorrollershaft.Supportdoorassemblyastherollershaftisremoved.Removethe
nutfromthetopoftherollershaft,anduseasoftalloymaterial(e.g.brassrod,etc.)tolightlytaptheshaftdownthroughthe
supportrollerassemblyuntilitcomesfreeatthebottom.Usecautionthatthethreadsontheendsofthesupportrollershafts
arenotdamaged.Donotlosethedoorshoulderbushings.
15. Removethehitchpinsecuringthetorquegaugeholdertothetorquegaugemountweldment,andremovethemount.
16. Removethefourhexsocketheadcapscrewssecuringthemotorandthetorquegaugemountweldment.Removethetorque
gaugemountweldment,thenliftthemotorupandawayfromthemotormount.Inspectthemotorgear,locatedatthebottomof
themotorshaft,forgearclashingortoothdamage.Also,ensurethatthemotorgearissecurelyattachedtothemotorshaft.
17. Removethecotterpinandclevispinconnectingtheshifterhandletotheshiftershaft(itisnotnecessarytodisconnectthehandle
fromthepivotlugweldment).
18. Unboltthepivotlugweldmentfromthetopplate,andremovethepivotlugandhandleassembly.
19. Removethefourhexsocketheadcapscrewssecuringthemotormounttothetopplate.Usecarenottodislodgeandlosethe
twopositioningdowels.
20. Removethesnapringsecuringthedrivegeartothetopoftheclutchshaft.Carefullyremovethedrivegearfromtheclutchshaft.
21. Removethetwo10-24x3/4”hexsocketheadcapscrewssecuringthetopclutchbearingretainertothetopplate.
22. Removethetopclutchbearingretainer,andbearingretainerspacer.Thetopclutchbearingandclutchbearingbushingmay
comeoffwiththebearingretainer.
23. Pullthe topbearing cap andspacer forthe piniondrive gear byremoving thefour 1/2”bolts which securethe bearingcap.
Threadtwooftheremovedboltsintotheextraholesontopofthebearingcap,andusethemasliftinglugstoliftthebearing
capoutofplace.
16. Removethejawpivotboltsandthejawassemblies.
17. Ensure the bottom cage plate is supported before beginning this step. Remove the two front cage plate bolt and nut sets.
Removethebackingpinassemblyandtherearcageplatebolt,andthecageplatespacers.Thetopandbottomcageplatesmay
nowberemoved-Notethatthecamfollowersarefastenedtothetopandbottomcageplates,sousecautionnottodamage
them.
18. Removethetopnutsandpadsfortherotaryidlergears.
19. Removetheremainingtoprollershaftnuts.Notethatthetopbrakebandadjustmentlugweldmentsareremovedatthispoint.
20. Loosen,butdonotremovethedetentboltonthetopshifterlugweldment.Oncetheforcefromthedetentballhasbeenremoved
fromtheshiftershaft,thetopshifterbushingcanbeun-threadedfromthetopplate.Takecarenottolosethedetentballwhen
thebushingcomesfreeoftheshaft.
21. Removethehexheadboltsandhexflatheadcapscrewsaroundtheperimeterofthetongthatsecurethetopplate.
22. Withalltheabovestepstaken,thetoptongplatecanbeliftedoffprovidingaccesstotheinsideofthegearcase.
MaInTEnanCE
IF THE BEARING REMAINS ATTACHED TO THE GEAR SHAFT AFTER THE BEARING CAP IS
PULLED, MCCOY DRILLING & COMPLETIONS SERVICE PERSONNEL RECOMMENDS LEAVING IT
IN PLACE UNTIL THE TOP TONG PLATE IS REMOVED.
THE CAGE PLATE BOLTS ARE THE ONLY ITEMS FASTENING THE BOTTOM CAGE PLATE TO THE
TONG. SUPPORT THE BOTTOM CAGE PLATE FROM BELOW PRIOR TO REMOVING CAGE PLATE
BOLTS IN ORDER TO PREVENT DAMAGE TO THE BOTTOM CAGE PLATE OR PERSONAL INJURY
TO THE MECHANIC
LIFT THE TOP PLATE STRAIGHT UP TO AVOID SNAPPING THE DOWEL PINS. A SNAPPED, BENT,
OR OTHERWISE DAMAGED DOWEL PIN CAN BE EXTREMELY DIFFICULT TO REMOVE.