Removing And Installing The Mower Blade(S); Inspecting And Sharpening The Mower Blade(S) - Toro Groundsmaster 4000 Operator's Manual

Removing and Installing
the Mower Blade(s)
Replace the blade if it hits a solid object, is out of
balance, or if it is bent. Always use genuine Toro
replacement blades to ensure safety and optimum
performance.
1. Raise the mower deck to the highest position,
engage the parking brake, shut off the engine,
and remove the ignition key.
Note:
Block the mower deck to prevent it from
accidentally falling.
2. Grasp the end of the blade using a rag or
thickly-padded glove.
3. Remove the blade bolt, anti-scalp cup, and
blade from the spindle shaft
Figure 114
1. Blade bolt
4. Install the blade, anti-scalp cup, and blade bolt
and tighten the blade bolt to 115 to 149 N∙m (85
to 110 ft-lb).
Important:
The curved part of the blade
must be pointing toward the inside of the
mower deck to ensure proper cutting.
Note:
After striking a foreign object, torque all
of the spindle-pulley nuts to 115 to 149 N∙m (85
to 110 ft-lb).
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
(Figure 114).
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2. Anti-scalp cup
appear brown and shredded. Sharpen the cutting
edges to correct this condition.
1. Position the machine on a level surface, raise
the mower deck, 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 115), replace the blade.
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
78
, put the PTO lever
NEUTRAL
115).
Figure 115
3. Wear/slot forming
4. Crack
116).
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