Toro GrandStand 79534 Operator's Manual page 53

Removing the Blades
Replace the blades if they hit a solid object, if a blade is out of
balance, or if a blade 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 nonconformance with
safety standards.
1. Hold the blade end using a rag or a thickly padded
glove.
2. Remove the blade bolt, the curved washer, and the
blade from the spindle shaft
Figure 78
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 (Figure 79).
Note: Maintain the original angle.
Note: The blade retains balance if the same amount
of material is removed from both cutting edges.
Figure 79
1. Sharpen at the original angle
(Figure 78).
3. Curved washer
4. Blade bolt
2. Check the balance of the blade by putting it on a blade
balancer (Figure
Note: If the blade stays in a horizontal position, the
blade is balanced.
1. Blade
3. If the blade is not balanced, file some metal off the end
of the sail area only
4. Repeat this procedure until the blade is balanced.
Installing the Blades
1. Install the blade onto the spindle shaft
Important: The curved part of the blade must be
pointing upward toward the inside of the mower to
ensure proper cutting.
2. Install the spring disk and blade bolt
Note: The spring-disk cone must be installed toward
the bolt head (Figure
3. Torque the blade bolt to 115 to 150 N∙m (85 to
110 ft-lb).
1. Sail area of the blade
2. Blade
53
80).
Figure 80
2. Balancer
(Figure 78).
(Figure
(Figure
81).
Figure 81
3. Spring disk
4. Blade bolt
81).
81).