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SECTION 7: SERVICING YOUR LAWNMOWER
BladeCare
Periodically inspect the blade adapter and pulley for
cracks, especially if you strike a foreign object. Replace
when necessary.
,_
WARNING"
When removing the cutting
blade for sharpening or replacement, protect
hands by using heavy gloves or a thick rag to
grasp the cutting blade.
•
Disconnect spark plug wire from spark plug.
•
Turn mower on its side making sure that the air filter
and the carburetor are up.
To RemoveBlade
•
Remove the bolt and the blade bell support that
hold the blade and blade adapter assembly to the
engine crankshaft. See Figure 14.
•
Remove the blade and the adapter assembly from
the crankshaft.
Blade
Adapter
Assembly_.__
Blade
Blade Bell
Support
=
Figure 14
To ReplaceBlade:
•
Before reinstalling the blade and adapter assembly
to the unit, lubricate the engine crankshaft and the
inner surface of the adapter with light oil.
•
Be sure to install the blade with the side of the
blade marked "Bottom" (or with part number) facing
the ground when the mower is in the operating
position.
•
Slide the blade adapter assembly onto the engine
crankshaft.
•
Place the blade on the adapter. Be certain the
blade is aligned and seated on the blade adapter
flanges.
•
Place blade bell support on blade. Make sure the
notches on the blade bell support are aligned with
small holes in the blade.
•
Secure with the hex bolt and blade bell support and
tighten to the recommended torque. Refer to 'Blade
Mounting Torque' section on this page.
IMPORTANT:The bolt, used to secure the blade to the
engine, is specially heat-treated. Do not substitute.
To
order replacement bolt, refer to the parts list in the back
of this manual.
_
ARNING:
To ensure safe operation of
your lawn mower, check all nuts and bolts
periodically and tighten if necessary.
BladeMountingTorque:
Blade adapter bolts: 120 in.lbs, minimum, 150 in.lbs.
maximum.
Center bolt: 450 in.lbs, minimum, 600 in.lbs, maximum.
To SharpenBlade:
•
The blade can be sharpened with a file or on a
grinding wheel. Do not attempt to sharpen the
blade while it is still on the mower.
•
Follow the original angle of grind as a guide. Make
sure that each cutting edge receives an equal
amount of grinding to prevent an unbalanced blade.
IMPORTANT:An unbalanced blade will cause excessive
vibration when rotating at high speeds, may cause
damage to the mower and could break causing
personal injury.
•
Test the blade by balancing it on a round shaft
screwdriver or a blade balancer.
•
If the blade is not balanced, remove metal from the
heavy side until it balances evenly.
Replacing D riveBelt
•
Remove the two shoulder screws which secure the
front drive cover to the mower deck. See Figure 15.
Idler
Bracket
Drive
Belt
\
Front Drive
Cover
Lock Nut
Shoulder
Idler
Screw
The wheels have been moved forward in this picture for clarity. Do
not remove the wheels away from the mower housing while
performing the job.
Figure
15
13
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