Toro 407570000 Operator's Manual page 25

21in heavy-duty rear bagger lawn mower
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Inspecting the Blade
Service Interval: Before each use or daily—Inspect
the mower blades for wear or
damage.
Carefully examine the blade for sharpness and wear,
especially where the flat and the curved parts meet
(Figure
27A). Because 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 you notice a slot or wear
27B and
Figure
27C), replace the blade; refer to
Removing the Blade (page
Figure 27
1. Sail
2. Flat part of the blade
Note:
For the best performance, install a new blade
before the mowing season begins. During the year,
file down any small nicks to maintain the cutting edge.
DANGER
A worn or damaged blade can break, and a
piece of the blade could be thrown toward you
or bystanders, resulting in serious personal
injury or death.
• Inspect the blade periodically for wear or
damage.
• Replace a worn or damaged blade.
Inspecting the Accelerator
Service Interval: Before each use or daily—Inspect
the accelerator for wear or damage.
Carefully examine the accelerator for excessive wear
(Figure
28). Because sand and abrasive material can
wear away the metal (especially in the area shown
as item 2 in
Figure
28), check the accelerator before
using the machine. If you notice that a tab on the
accelerator has been worn down to a sharp edge or
there is a crack, replace the accelerator.
(Figure
25).
g002278
3. Wear
4. Slot formed
1. Accelerator
2. Wear area
WARNING
A worn or damaged accelerator can break,
and a piece of the accelerator could be thrown
at you or bystanders, resulting in serious
personal injury or death.
• Inspect the accelerator periodically for
wear or damage.
• Replace a worn or damaged accelerator.
Removing the Blade
1.
Grasp the end of the blade using a rag or a
thickly padded glove.
2.
Remove the blade bolt, the lock washer, the
accelerator, and the blade
Sharpening the Blade
Service Interval: Every 50 hours—Sharpen or
replace the blade. Maintain it more
frequently if the edge dulls quickly in
rough or in sandy conditions.
File the top side of the blade to maintain its original
cutting angle
(Figure
radius
(Figure
29B). The blade will remain balanced if
you remove the same amount of material from both
cutting edges.
1. Sharpen the blade at this
angle only.
Balancing the Blade
1.
Check the balance of the blade by placing
the center hole of the blade over a nail or
25
Figure 28
3. Tab
4. Crack formed
(Figure
27).
29A) and inner cutting edge
Figure 29
2. Maintain the original radius
here.
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