Toro 77281 Operator's Manual page 71

1. Sail area of the blade
2. Blade
3. Curved washer
Sharpening the Blades
1. Use a file to sharpen the cutting edge at both
ends of the blade
Note:
Maintain the original angle.
Note:
The blade retains its balance if the same
amount of material is removed from both cutting
edges.
Figure 100
1. Sharpen at original angle.
2. Check the balance of the blade by putting it on
a blade balancer
Note:
If the blade stays in a horizontal position,
the blade is balanced and can be used.
Note:
If the blade is not balanced, file some
metal off the end of the sail area only
100).
Figure 99
4. Blade bolt
5. Spindle shaft
(Figure 100).
(Figure 101).
(Figure
1. Blade
3. Repeat this procedure until the blade is
balanced.
Installing the Blades
1. Install the blade onto the spindle shaft
99).
Important:
must point upward toward the inside of the
mower to ensure proper cutting.
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2. Install the curved washer and blade bolt
99).
Note:
Install the curved-washer cone toward
the bolt head.
3. Torque the blade bolt to 115 to 150 N∙m (85 to
110 ft-lb).
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71
Figure 101
2. Balancer
The curved part of the blade
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(Figure
(Figure