Removing The Blades - Toro 74840 Operator's Manual

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1. Opposing blade edge, in position for measuring
2. Level surface
3. Second measured distance between blade and surface (B)
WARNING
A blade that is bent or damaged could break
apart and could seriously injure or kill you or
bystanders.
• Always replace bent or damaged blade with
a new blade.
• Never file or create sharp notches in the
edges or surfaces of blade.
A. If the difference between A and B is greater
than 1/8 inch (3mm) replace the blade with a
new blade. Refer to Removing the Blades and
Installing the Blades.
Note: If a bent blade is replaced with a new one
and the dimension obtained continues to exceed
1/8 inch (3mm), 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

Blades must be replaced if a solid object is hit, if the
blade is out of balance or 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.
Hold the blade end using a rag or thickly-padded glove.
Remove the blade bolt, curved washer, and blade from
the spindle shaft (Figure 58).
G009680
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Figure 57
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1. Sail Area of Blade
2. Blade
Sharpening the Blades
WARNING
When sharpening blade, pieces of blade could be
thrown and cause serious injury.
Wear proper eye protection when sharpening blade.
1. Use a file to sharpen the cutting edge at both ends
of the blade (Figure 59). Maintain the original angle.
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 60). 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 58). Repeat this
procedure until the blade is balanced.
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G010341
Figure 58
3. Curved washer
4. Blade Bolt
Figure 59