Inspecting And Sharpening The Blade(S) - Toro 30722 Operator's Manual

ignition key. Block the cutting unit to prevent it from
accidentally falling.
2. Grasp the end of the blade using a rag or thickly padded
glove. Remove the special screw, belleville washer and
blade from spindle assembly (Figure 27).
Note: The special screw has left hand thread.
1. Belleville washer
3. Install the blade, sail facing up, with the belleville
washer and special screw. Tighten the screw to 102-136
N-m (75-100 ft-lb).
WARNING
Do not try to straighten a blade that is bent,
and never weld a broken or cracked blade.
Always use a new blade to ensure continued
safety certification of the product.
Inspecting and Sharpening the
Blade(s)
Service Interval: Before each use or daily
Every 50 hours
DANGER
A worn or damaged blade can break, and a piece
of the blade could be thrown into the operator's
or bystander's area, resulting in serious personal
injury or death.
• Inspect the blade periodically for wear or
damage.
• Do not try to straighten a blade that is bent.
• Never weld a broken or cracked blade.
• Replace a worn or damaged blade with a
new Toro blade to ensure continued safety
certification of the product.
1
2
Figure 27
2. Blade bolt
1. Raise the cutting unit to the highest position, shut the
engine off, and engage the parking brake. Block the
cutting unit to prevent it from accidentally falling.
2. Examine the cutting ends of the blade carefully,
especially where the flat and curved parts of the blade
meet (Figure 28). Since sand and abrasive material can
wear away the metal that connects the flat and curved
parts of the blade, check the blade before using the
machine. If wear is noticed (Figure 28), replace the
blade; refer to Removing the Cutting Blade.
G021322
1. Cutting edge
2. Curved area/sail
WARNING
If the blade is allowed to wear, a slot will form
between the sail and flat part of the blade
(Figure 28). Eventually, a piece of the blade
may break off and be thrown from under the
housing, possibly resulting in serious injury to
yourself or bystanders.
• Inspect the blade periodically for wear or
damage.
• Replace a worn or damaged blade with a
new Toro blade to ensure continued safety
certification of the product.
3. Examine the cutting edges of all blades. Sharpen the
cutting edges if they are dull or nicked. Sharpen only
the top side of the cutting edge and maintain the
original cutting angle to ensure sharpness (Figure 29).
The blade will remain balanced if the same amount of
metal is removed from both cutting edges.
1. Sharpen at original angle
21
Figure 28
3. Wear/slot forming
4. Crack
Figure 29