Toro 74969 Operator's Manual page 67

Removing the Blades
Replace the blades if they hit a solid object, or if the
blade is out of balance or bent.
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 106
1. Sail area of the blade
2. Blade
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 107
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.
(Figure 106).
3. Curved washer
4. Blade bolt
(Figure 107).
(Figure 108).
Note:
If the blade is not balanced, file some
metal off the end of the sail area only
107).
1. Blade
3. Repeat this procedure until the blade is
balanced.
Installing the Blades
1. Install the blade onto the spindle shaft
106).
Important:
must point upward toward the inside of the
mower to ensure proper cutting.
2. Install the curved washer and blade bolt
106).
Note:
Install the curved-washer cone toward
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the bolt head.
3. Torque the blade bolt to 115 to 150 N∙m (85 to
110 ft-lb).
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67
Figure 108
2. Balancer
The curved part of the blade
(Figure
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(Figure
(Figure