MTD 25B-520A700 - Page 11

WARNING: Disconnectthe spark plug
,_ wireandgroundagainstthe engine
before performing anyadjustment,
repairsor maintenance.
Lubrication
Engine
RefertotheEngineManualpackedwithyouredgerfora
detaileddescriptionofallengine-relatedservicespecs.
Wheels
Lubricatethewheelsandbearingsat leastoncea
seasonwitha lightoil. Also if thewheelsareremovedfor
anyreason,lubricatethesurfaceof the axle boltandthe
innersurfaceofthe wheelwithlightoil.
Pivot Points
Lubricatethepivotpointsonthebladecontrolbail,blade
depthcontrollever,andifapplicable,thebladeadjust-
mentlever,andcurb heightadjustmentleverwithlightoil
atleastoncea season.
Bearing Block
Lubricatethebearingblockoncea season,orasneeded
bysimplyapplyingoilateachend ofthecoverplate.
SeeFigure9.
Model550
shownhere
Lubricate
Figure9
Replacing the Edger Blade
_ ARNING:Theedgerblade is sharp.
Wearleatherwork gloves to protect
your handswhen working around the
edgerblade.
_ WARNING: Disconnectthe spark plug
wire and ground against engine before
performingthe following steps.
1. Workingin frontof the edger,loosentheflangelock
nuton topofframe,allowingthe idlerpulleyassembly
topivotslightlyoutfromtheframe.SeeFigure10.
_ FlangeLockNut
Flywheel' _IAI _I_
Pulley
o,oe,, °voes';e0oo,,
Figure10
2. Withyourotherhand,carefullyreachundertherearof
theunitandremovethebeltfromaroundtheengine
flywheelpulley.
3. Removethespindlesheavesbeltguardby removing
thetwoself-tappingscrewswhichsecureittothe
bladeplateassembly.
4. Usetwowrenches(onewrenchtopreventthehex
boltheadfromspinningandtheotherto removethe
flangenut)toremovetheedgerblade.
Referto Figure11.
Hex Bolt Head FlangeNut
Figure11
5. Removeanddiscardtheedgerbladebutretainthe
flangenut.
6. Installthe replacementedgerbladeandthe flangenut
removedearlier.
IMPORTANT:Usea torquewrenchtotightentheflange
nuttobetween37foot-lbs,and50foot-lbs.
7. Reinstallthespindlebeltguardwiththeselftapping
screwsremovedearlier.
8. Carefullyplacethedrivebeltbackontotheengine
flywheelpulley,and retightentheflangelocknut on
thetopof the frame.
IMPORTANT:Makecertainthatthedrivebeltis
seatedcorrectlyonthebladespindleandthat itis riding
smoothlyonthespindlesheavesand isnotpinched
betweenthem.Repeatthefirstthreestepsifthe beltis
pinched.
i i i i _ i
WARNING
The edger blade
is sharp. Wear
leather work gloves
to protect your hands
when working around
the edger blade
Disconnect the spark
plug wire and ground
against the engine
before performing
any adjustment,
repairs or mainte-
nance,
11