ProcedureforremovingandreplacingHeadstockSpindleforreplacinganypart
requiringthisoperation
Thisisthe preferred procedureusingthespindlepullerdetailsofwhicharegiven
onDrawingsM4andM5inAppendix"B".
An alternativemethodisgivenintheTextBookofTurning.
Thefrontandrearbearingcapsareremovedandthetake-upnutunscrewedusing
the"C"spannerillustratedon DrawingM6.
To removethe spindle,placethe pullerin positionas showninDrawingM1and
tightenthepullernut(2)topullthespindleclearoftherearbearingconeandbull
gear.Thepullernutisthenremovedandthespindlecompletelywithdrawn.
To replacethespindle,insertitthroughthebullgearandconepulley,liningupthe
bullgearkeyway. PositionthepullerasshowninDrawingM2andtightenthepuller
nut(2)topullthe spindle throughthebull gear.Thenutandspacerarethen
removedandthespacingcollarplacedonthespindleandturneduntilthekeyway
springengagesinthekeyway.
TherearbearingisthenpulledonasshowninDrawingM3.
Finally,thefrontandrear bearingcapsare replacedandthetakenutscrewedon
andtightenedtogivetherecommendedpreloadof0.2 Newtonmetresandthelock
screwtightened.
ProcedureforremovingandreplacingtheBackGearShaftforreplacinganypart
requiringthisoperation.ReferDrawingA1- Appendix A
Slackenoffthebackgear tension screw (138)and removethebackgear lever
adjustingscrew(141).(Itisadvisabletoloosenthenut(142)justsufficientlytofree
the screwandthentakethetwooffasoneunittogivea guidetothe correct
positioningwhen re-assembling). Driveoutspringpin(135)and removetheback
gearlever(136)togetherwiththebackgearshaft(133).
To re-assemble,insertthebackgearleverandshaft,andreplacethespringpin.The
adjustingscrewandnutarethenreplacedandlockedinpositiontogivethecorrect
gearbacklashandthetensionscrewre-set.
Procedureforfittinga beltoverthecountershaft.DrawingA36- Appendix A
(Early model machineshada one pieceyokeandthe procedureinthiscaseis
outlinedintheTextBookofTurning)
Firstly removethe DrivePulley(216), loosenthe lockingscrew(226)andtapthe
pivotshaft(225)outtowardsthetailstockuntilitclearstheleft-handyokesection.
Removethe clampingscrew(204)and swingthe left-handyoke section(209)
forwarduntilitisabovethecountershaft(211).Thebeltmaythenbefittedoverthe
cone pulley (212)
Re-assemblebyswingingtheyokesectionbackintoposition,replacingtheclamping
screw, tapping the pivotshaftbackinto position, lockingitwiththescrewand
replacingthedrivingpulley.
6
4/
5/
6/
