Inspecting And Sharpening The Mower Blade(S) - Toro Groundsmaster 4500-D Operator's Manual

Inspecting and Sharpening
the Mower Blade(s)
Two areas must be considered when checking and
servicing the mower blade—the sail and the cutting
edge. Both cutting edges and the sail, which is
the turned-up portion opposite of 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 gradually
wears down during operation. As the sail wears
down, the quality of cut degrades, 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.
1. Park the machine on a level surface, raise the
mower decks, engage the parking brake, put
the traction pedal in
in the O position, shut off the engine, and
FF
remove the key.
2. Examine the cutting ends of the blade carefully,
especially where the flat and curved parts of the
blade meet (Figure
Note:
Because sand and 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 104), replace the blade.
, put the PTO lever
NEUTRAL
104).
1. Cutting edge
2. Curved area
3. Examine the cutting edges of all of the blades
and sharpen the cutting edges if they are dull
or nicked (Figure
Note:
Sharpen only the top of the cutting
edge and maintain the original cutting angle
to ensure sharpness
remains balanced if the same amount of metal
is removed from both cutting edges.
1. Sharpen at the original angle.
76
Figure 104
3. Wear/slot forming
4. Crack
105).
(Figure 105). The blade
Figure 105
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