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Important:
The curved part of the blade
must be pointing toward the inside of the
cutting unit to ensure proper cutting.
Note:
After striking a foreign object, torque all
the spindle pulley nuts to 115 to 149 N-m (85
to 110 ft-lb).
Figure 110
1. Blade bolt
Inspecting and Sharpening
the Cutter Blade(s)
DANGER
A worn or damaged blade can break, and
a piece of the blade could be thrown into
the operator's or bystander's area, resulting
in serious personal injury or death. Trying
to repair a damaged blade may result in
discontinued safety certification of the
product.
• Inspect the blade periodically for wear or
damage.
• Never try to straighten a blade that is bent
or weld a broken or cracked blade.
• Replace a worn or damaged blade.
Two areas must be considered when checking and
servicing the cutter blade-the sail and the cutting
edge. Both cutting edges and the sail, which is the
turned up portion opposite the cutting edge, contribute
to a good quality-of-cut. The sail is important because
it lifts the grass up straight, thereby producing an
even cut. However, the sail will gradually wear down
during operation, and this condition is normal. As
the sail wears down, the quality-of-cut will degrade
somewhat, although the cutting edges are sharp.
The cutting edge of the blade must be sharp so that
the grass is cut rather than torn. A dull cutting edge
is evident when the tips of the grass appear brown
and shredded. Sharpen the cutting edges to correct
this condition.
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2. Anti-scalp cup
1.
Position the machine on a level surface. Raise
the cutting unit, engage the parking brake, put
the traction pedal in neutral, put the PTO lever
in the Off position, stop the engine, and remove
the ignition key.
2.
Examine the cutting ends of the blade carefully,
especially where the flat and curved parts of
the blade meet
abrasive material can wear away the metal that
connects the flat and curved parts of the blade,
check the blade before using the mower. If wear
is noticed
(Figure
1. Cutting Edge
2. Curved Area
3.
Examine the cutting edges of all of the blades.
Sharpen the cutting edges if they are dull or
nicked. Sharpen only the top of the cutting edge
and maintain the original cutting angle to make
sure of sharpness
remain balanced if the same amount of metal is
removed from both cutting edges.
70
(Figure
111). Since sand and
111), replace the blade.
Figure 111
3. Wear/slot Forming
4. Crack
(Figure
112). The blade will
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