Removing The Blades - Toro 74670 Operator's Manual

Removing the Blades

The blades must be replaced if a solid object is hit, if the
blade is out of balance, or if the 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 non-conformance with safety standards.
1. Hold the blade end using a rag or thickly-padded glove.
2. Remove the blade bolt, the curved washer, the blade
stiffener, and the blade from the spindle shaft
47).
Figure 47
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 (Figure 48).
Note: Maintain the original angle.
Note: The blade retains its balance if the same amount
of material is removed from both cutting edges.
Figure 48
1. Sharpen at original angle
2. Check the balance of the blade by putting it on a blade
balancer (Figure 49).
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
(Figure
4. Blade bolt
5. Blade stiffener
(Figure 48).
1. Blade
3. 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 blade stiffener, the curved washer (cupped
side toward the blade), and the blade bolt
3. Torque the blade bolt to 47 to 88 N-m (35 to 65 ft-lb).
40
Figure 49
2. Balancer
(Figure
(Figure
47).
47).