CUTTING BLADES

Shutthe engineoffand removeignitionkeybeforeremovingthe cuttingblade(s)for sharpeningor replacement.Protectyour hands usingheavygloveswhengraspingthe blade.

Periodicallyinspectthe bladeand/or spindlefor cracksor damage, especiallyafter you'vestrucka foreignobject.Do not operatethe machineuntil damagedcomponentsare replaced.

Toremovetheblades,proceedas follows.

1.Removethe deckfrombeneaththe mower,(referto CuttingDeck Removalearlierinthis section)thengentlyflip thedeckoverto exposeitsunderside.

2.Placea blockof wood betweenthe centerdeckhousingbaffle andthe cuttingbladeto act asa stabilizer.SeeFigure27.

J

Figure27

. Removethe hexflangenutthatsecuresthe bladeto the spindle assembly.SeeFigure27.

. To properlysharpenthecutting blades,removeequalamounts of metalfrombothendsof the bladesalongthe cuttingedges, parallelto the trailingedge,at a 250.to 300angle.Alwaysgrind eachcuttingbladeedgeequallyto maintainproperbladebalance. See Figure28.

Ifthe cuttingedgeof thebladehas previouslybeensharpened,or if any metalseparationis present,replacethe bladeswithnewones.

Apoorlybalancedbladewill causeexcessivevibration,maydamage to the mowerand/or resultin personalinjury.

Figure28

5.Testthe blade'sbalanceusinga bladebalancer.Grindmetalfrom the heavyend untilthe bladebalancesevenly.

NOTE: Whenreplacingtheblade,be sureto installthe bladewiththe side of the blademarked"Bottom" (orwitha partnumberstampedin it) facingthe groundwhenthe moweris inthe operatingposition.

Usea torquewrenchtotightenthe bladespindlehexflangenut to between70Ibs-ftand90 Ibs-ft.

The cuttingbladesmust be installedperpendicularto eachother.If the bladescannotbeinstalledperpendicularto eachother,the blade timingbeltmust bereset.SeeyourSearsorotherqualifiedservice dealerto havethe decktimingbeltreset.

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Craftsman 247.889980 manual Cutting Blades

247.889980, 88998 specifications

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