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Figure 31
1. Blade
2. Blade bolt and lock washer
Inspecting the Blade
Service Interval: Before each use or daily
Carefully examine the blade for sharpness and wear, especially
where the flat and the curved parts meet (Figure 32A).
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 machine. If you notice a slot or
wear (Figure 32B and Figure 32C), replace the blade; refer
to Removing the Blade.
Figure 32
1. Sail
2. Flat part of the blade
Note: For the best performance, install a new blade before
the cutting season begins. During the year, file down any
small nicks to maintain the cutting edge.
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.
• Inspect the blade periodically for wear or
damage.
• Replace a worn or damaged blade.
3. Accelerator
3. Wear
4. Slot formed
Removing the Blade
Grasp the end of the blade using a rag or a thickly padded
glove. Remove the blade bolt, the lock washer, the accelerator,
and the blade (Figure 31).
Sharpening the Blade
File the top side of the blade to maintain its original cutting
angle (Figure 33A) and inner cutting edge radius (Figure 33B).
The blade will remain balanced if you remove the same
amount of material from both cutting edges.
1. Sharpen at this angle only. 2. Maintain the original radius
Balancing the Blade
1. Check the balance of the blade by placing the center
hole of the blade over a nail or screwdriver shank
clamped horizontally in a vise (Figure 34).
Note: You can also check the balance using a
commercially manufactured blade balancer.
2. If either end of the blade rotates downward, file that
end (not the cutting edge or the end near the cutting
edge). The blade is properly balanced when neither
end drops.
Installing the Blade
1. Install a sharp, balanced Toro blade, the accelerator, the
lock washer, and the blade bolt. The sail of the blade
must point toward the top of the machine housing for
proper installation. Torque the blade bolt to 50 ft-lb
(68 N-m).
19
Figure 33
here.
Figure 34
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