Blade Care - MTD 12BV829Q755 Operator's Manual

Blade Care f
__k ARNING:Whenremovingcutting
bladefor sharpeningor replacement,
protectyourhandswith a pairof heavy
gloves or use a heavy rag to hold blade.
1. Disconnectsparkplug wirefrom spark plug.Turn
moweron its side makingsurethat the air filter and
the carburetorare up.
2. Removebolt, blade bell support,blade,and blade
adapterfrom the enginecrankshaft.See Figure5-3.
NOTE:When removing the blade,bladeadapter,etc., be
careful notto removeor lose parts aboveit associated
with the engine pulley.
3. The bladecan be sharpenedwith a fileor on a grind-
ing wheel.Do notattemptto sharpenthe blade while
it is still on the mower.Whensharpeningblade,follow
originalangle of grind.Grind cuttingedgesequallyto
keep bladebalanced.
4. Removebladefrom the adapterfor testingbalance.
Balancethe bladeon a roundshaftscrewdriver to
check. Removemetalfrom the heavysideuntil it
balancesevenly.
j
Figure5-3:Removebolt and bellsupportto gain accessto the
blade.
__k WARNING:An unbalanced bladewill
causeexcessive vibration when rotating
at high speeds, it may cause damage
to mower,and could break causing
personalinjury.
5. Lubricatetheenginecrankshaftand the inner surface
of the blade adapterwith lightoil. Slide the blade
adapteronto the enginecrankshaft.Placethe blade
on theadaptersuch that the sideof the blade marked
"Bottom"(or with part number)facesthe groundwhen
the moweris in the operatingposition.Makesurethat
blade is alignedand seatedon bladeadapterflanges.
6. Placeblade bell supporton the blade.Align notches
on the bladebell supportwith smallholesin blade.
Replacehex boltand tightenhex boltto torque:450
in. Ibs. min.,600 in. Ibs.max.
Toensuresafe operationof yourmower,periodically
checkthe blade boltfor correcttorque.
Figure5-4:A. Remove the screwsthathold the enginebaffle
ontothe deck.B.Loosenthe screwthat holds deckbaffleonto
deck.
Belt Care
1. Disconnectthe spark plugwire and groundit against
theengine.
2. Drainthefuel tank or placea pieceof plastic
beneaththe capto preventgasolineleakage.
3. Tip moweron its side(air cleanersideof engine up).
4. Removeblade,adapter,and relatedhardwareas
instructedunder"BladeCare"above.See Figure
5-3.
.
a. Removethe self-tappingscrewsthat secures
theengine baffleto the deck. See Figure5-4.
Removeengine baffle.
b. Loosenself-tappingscrewthat securesdeck
baffleto the deck. See Figure5-4.
WARNING
When removing
the cutting blade
for sharpening or
replacement or
when sliding the belt
around it, protect
your hands with a
pair of heavy gloves
or use a heavy rag to
hold the blade.
An unbalanced blade
will cause excessive
vibration when rotat-
ing at high speeds, it
may cause damage
to mower, and could
break causing per-
sonal injury.
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