Removing The Blades - Toro 74637 Operator's Manual

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1. Opposite blade edge (in position for measuring)
2. Level surface
3. Second measured distance between blade and surface (B)
A. If the difference between A and B is greater than
3 mm (1/8 inch), replace the blade with a new
blade; refer to Removing the Blades (page 33) and
Installing the Blades (page 33).
Note: If a bent blade is replaced with a new one,
and the dimension obtained continues to exceed 3
mm (1/8 inch), the blade spindle could be bent.
Contact an Authorized Toro Dealer for service.
B. If the variance is within constraints, move to the
next blade.
Repeat this procedure on each blade.

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 (Figure
45).
G014973
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Figure 44
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 46).
Note: Maintain the original angle.
Note: The blade retains its balance if the same amount
of material is removed from both cutting edges.
1. Sharpen at original angle
2. Check the balance of the blade by putting it on a blade
balancer (Figure 47).
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 46).
1. Blade
3. Repeat this procedure until the blade is balanced.
Installing the Blades
1. Install the blade onto the spindle shaft (Figure 45).
Important: The curved part of the blade must be
pointing upward toward the inside of the mower to
ensure proper cutting.
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Figure 45
4. Blade bolt
5. Blade stiffener (42-inch
decks only)
Figure 46
Figure 47
2. Balancer