Operator's Manual

Figure38
1.Normalpositionofrotary
valvecontrolsforforward
cutting-unitrotation
2.T ostarttheback-lapping
procedure,rotatethe
lockleverclockwiseto
position1;rotatetherotary
valvecounterclockwiseto
position2;releasethelock
levercounterclockwiseto
position3.
7.OperatethetractorPTOswitch/levertotheOFF
position(Figure38)andswitchoffthetractorengine
whenthegrindingactionhasstopped.
8.Thoroughlycleanthebladeedgesandadjustthecutting
cylinderstothebottomblades.
9.Checkthatathinpieceofpapercanbecutcleanlyat
allpointsalongthecuttingedgeswhilerotatingthe
cylindersbyhand.
10.Iffurtherbacklappingisnecessary,repeatsteps3
through9.
11.Thoroughlyremoveandwashoffalltracesofthe
carborundumpastefromthecylindersandthebottom
blades.
12.Movethecontrollevertotheoriginalpositionfor
normaloperation.
Note:Theback-lapcontrollockshouldspringback,
lockingthecontrolleverinposition.
GrindingtheCuttingUnits
HaveyourToroAuthorizedDistributorcarryoutagrinding
operationtocorrectthecylinderspiraledgesand/or
bottom-bladeedgeswhentheyhavebecomeexcessively
roundedordistorted.Ifthebottombladesarenearingthe
endoftheirwearlife,havethemreplaced.Havethenew
bladesgroundontheirholderspriortoinstallingthem.Grind
boththecylindersandthebottombladesatthesametime.
Theonlyexceptiontothisruleiswhenanewcylinderistted,
inwhichcaseitisonlynecessarytogrindthebottomblade.
Allsuchgrindingoperationsshouldbecarriedoutbyyour
authorizeddealerordistributoronaquality,well-maintained
cylinder/bottom-bladegrindingmachine.
Storage
•Parkthemoweronlevelground.
•Performroutinechecks.
•Releasethemowerbrakes—operatethemowerhandbrake
downwardtothelowestpositiontoreleasethemower
brakes.
•Adjustthecuttingcylinderssuchthattheyareclearofthe
bottomblades.
•Preventtiredistortion—supportthemowerchassison
blockssuchthatthetiresareclearofthegroundto
preventtiredistortion.
•Preventcorrosion—treatbaremetalsurfacesincluding
thecuttingedgesofthecuttingcylinders,bottomblades,
andexposedhydraulic-cylinderrodswithgrease,oil,ora
proprietarycorrosioninhibitor.
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