Toro 74901 Operator's Manual page 60

Figure 95
1. Sharpen at original angle
2. Check the balance of the blade by putting it on a
blade balancer (Figure 96). 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 97). Repeat this
procedure until the blade is balanced.
Figure 96
1. Blade 2. Balancer
Installing the Blades
1. Install the blade onto the spindle shaft (Figure 97).
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. The spring
disk cone must be installed toward the bolt head
(Figure 97). Torque the blade bolt to 85-110 ft-lb
(115-150 N-m).
1. Sail Area of Blade
2. Blade
60
Figure 97
3. Spring Disk
4. Blade Bolt