Toro 74740 Operator's Manual page 37

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
(page 37) and
38).
Note:
If a bent blade is replaced with a new
one, and the dimension obtained continues
to exceed 3mm (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, and
the blade from the spindle shaft
Figure 46
Removing the Blades
Installing the Blades (page
(Figure
g014973
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:
Note:
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
Note:
the blade is balanced, and can be used.
Note:
metal off the end of the sail area only
47).
1. Blade
3. Repeat this procedure until the blade is
balanced.
37
Figure 47
3. Curved washer
4. Blade bolt
(Figure 48).
Maintain the original angle.
The blade retains its balance if the same
Figure 48
(Figure 49).
If the blade stays in a horizontal position,
If the blade is not balanced, file some
Figure 49
2. Balancer
g027833
g000552
(Figure 48).
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