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

Inspecting and Sharpening
the Cutting Unit 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
cutting unit, engage the parking brake, put the
traction pedal in
in the O position, shut off the engine, and
FF
remove the key from the ignition.
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 130), replace the blade.
, put the PTO lever
NEUTRAL
130).
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 (Figure
balanced if you remove the same amount of
metal from both cutting edges.
1. Sharpen at the original angle.
87
Figure 130
3. Wear/slot forming
4. Crack
131).
131). The blade remains
Figure 131
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