MTD 760 - Blade Inspection, Sharpening, and Replacement

Cutting Blades f
WARNING: Be sure to shut
the engine off, remove ignition
key,disconnect the spark plug
wire(s) and ground against the
engine to prevent unintended
starting before removing the cut-
ting blade(s) for sharpening or
replacement. Protect your hands
by using heavy gloves or a rag to
grasp the cutting blade.
WARNING: Periodically inspect
the blade spindles for cracks or
damage, especially if you strike a
foreign object. Replace immedi-
ately if damaged.
Thebladesmayberemovedas follows.
1. Removethe deckfrombeneaththe tractor,(referto
CuttingDeckRemovalon page23) thengentlyflip
thedeckoverto exposeitsunderside.
2. Placea blockof wood betweenthe centerdeckhous-
ingbaffleandthecuttingbladeto act asa stabilizer.
SeeFigure24.
3. Usea 15/16"wrenchto removethe hexflangenut
thatsecuresthe bladeto thespindleassembly.See
Figure24.
4. Toproperlysharpenthecuttingblades,removeequal
amountsof metalfrombothendsofthebladesalong
thecuttingedges,parallelto the trailingedge,at a
25°to 30°angle.
IMPORTANT:If the cuttingedgeofthebladehasalready
beensharpenedto within15/8' fromthe edge,or if any
metalseparationis present,replacethebladeswith new
ones.SeeFigure25.
o
o
It is importantthateachcuttingbladeedgebeground
equallyto maintainproperbladebalance.
A poorlybalancedbladewill causeexcessive
vibrationand maycausedamageto thetractorand
resultinpersonalinjury.The bladecan betestedby
balancingit ona roundshaftscrewdriver.Grindmetal
fromtheheavysideuntil it balancesevenly.
Figure 24
1-5/8
Figure 25
Whenreplacingtheblade,besure to installthe blade
with thesideoftheblademarked"Bottom"(or with
a part numberstampedinit) facingthe groundwhen
themowerisintheoperatingposition.
IMPORTANT:Useatorquewrenchto tightenthe blade
spindlehex flangenutto between70foot-poundsand90
foot-pounds.
, ,',g
Your Lawn
j
Tractor
i
l
l
l
l
WARNING
IBe sure to shut the
lengine off, remove
iignition key, discon-
inect the spark plug
wire(s) and ground
against the engine to
_revent unintended
starting before remov-
ing the cutting blade(s)
for sharpening or
replacement. Protect
your hands by using
heavy gloves or a rag
to grasp the cutting
blade.
Periodicallyinspect
the blade spindlesfor
cracksor damage,
especially if you strike
aforeign object.
Replaceimmediately if
damaged.
25