Toro 74978 Operator's Manual page 58

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 (rotating it counter-clockwise),
curved washer, and blade from the spindle shaft
(Figure 92).
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 93). Maintain the original angle. The
blade retains its balance if the same amount of material
is removed from both cutting edges.
1. Sharpen at original angle
2. Check the balance of the blade by putting it on a blade
balancer (Figure 94). If the blade stays in a horizontal
Figure 92
3. Curved washer
4. Blade Bolt
Figure 93
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 95). Repeat this procedure
until the blade is balanced.
1. Blade
58
Figure 94
2. Balancer