Toro 74922 Operator's Manual page 60

Removing the Blades
Blades must be replaced if a solid object is hit, if the blade is
out of balance or is bent. To ensure optimum performance
and continued safety conformance of the machine, use
genuine Toro replacement blades. Replacement blades made
by other manufacturers may result in non-conformance with
safety standards.
1. Hold the blade end using a rag or thickly-padded glove.
2. Remove the blade bolt, curved washer, and blade from
the spindle shaft (Figure 95).
Figure 95
1. Sail Area of Blade
2. Blade
Sharpening the Blades
WARNING
When sharpening blade, pieces of blade could be
thrown and cause serious injury.
Wear proper eye protection when sharpening blade.
1. Use a file to sharpen the cutting edge at both ends of
the blade (Figure 96). Maintain the original angle. The
blade retains its balance if the same amount of material
is removed from both cutting edges.
Figure 96
1. Sharpen at original angle
3. Curved washer
4. Blade Bolt
2. Check the balance of the blade by putting it on a blade
balancer (Figure 97). If the blade stays in a horizontal
position, the blade is balanced and can be used. If the
blade is not balanced, file some metal off the end of
the sail area only (Figure 98). Repeat this procedure
until the blade is balanced.
1. Blade
60
Figure 97
2. Balancer