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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.
Remove the bolt and blade support which hold the
blade and adapter to the engine crankshaft. See
Figure 12. Remove the blade and adapter from the
crankshaft.
Blade Adapter
Blade
Hex Bolt
Figure 12
To Sharpen Blade:
•
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.
NOTE:
An unbalanced
blade
will cause
excessive
vibration
when rotating at high speeds, may cause
damage
to the mower
and
could
break
causing
personal injury,
The blade can be tested by balancing it on a round
shaft screwdriver. See Figure 13. Remove metal
from the heavy side until it balances evenly. It is
recommended that the blade always be removed
from the adapter for the best test of balance.
1. Insert screw driver through hole
d./
2. Blade should be parallel to ground
Screw
Driver
_
_
Blade
1_
O_(_
O
Ground
Figure 13
•
Before reassembling the blade and the blade
adapter to the unit, lubricate the engine crankshaft
and the inner surface of the blade adapter with light
oil (or engine oil). Also lubricate the bolt holes and
bolt.
•
Install the blade adapter on the crankshaft with the
"star" away from the engine. Refer to Figure 12.
Place the blade with the side marked bottom (or
with part number) facing away from the adapter.
•
Align the blade bell support over the blade with the
tabs in the holes of the blade and insert the hex
bolt. Tighten the center bolt to 450 in. Ibs. min., 600
in. Ibs. max.
IMPORTANT:To ensure safe operation, all nuts and
bolts must be checked periodically for correct tightness.
13
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