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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.
• Never weld a broken or cracked blade.
• Always replace a worn or damaged
blade.
Inspecting and Sharpening the
Blade
1.
Raise the cutting deck to the highest position,
shut the engine off, and engage the parking
brake. Block the cutting deck to prevent it from
falling accidentally.
2.
Examine the cutting ends of the blade carefully,
especially where the flat and curved parts of
the blade meet
(Figure
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
refer to Removing the Cutter Blade.
DANGER
If the blade is allowed to wear, a slot
will form between the sail and flat part
of the blade
(Figure
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.
• Always replace a worn or damaged
blade.
84). Since sand and
84), replace the blade;
84). Eventually a
1. Cutting edge
2. Sail
3.
Inspect the cutting edges of all blades. Sharpen
the cutting edges if they are dull or nicked.
Sharpen only the top of the cutting edge and
maintain the original cutting angle to make
sure of sharpness
remain balanced if the same amount of metal is
removed from both cutting edges.
1. Sharpen at this angle only
4.
To check the blade for being straight and parallel,
lay the blade on a level surface and check its
ends. The ends of the blade must be slightly
lower than the center, and the cutting edge must
be lower than the heel of the blade. This blade
will produce good quality of cut and require
minimal power from the engine. By contrast a
blade that is higher at the ends than the center,
or if cutting edge is higher than the heel, the
blade is bent or warped and must be replaced.
5.
Install the blade, sail facing toward cutting deck,
with the anti-scalp cup and blade bolt. Tighten
the blade bolt to 115–149 N-m (85–110 ft-lb).
Checking the Blade Stopping Time
Service Interval: Before each use or daily
The blades of the cutting deck should come to a
complete stop in approximately 5 seconds after you
shut down the cutting deck engagement switch.
Note:
Make sure the decks are lowered onto a clean
section of turf or hard surface to avoid thrown dust
and debris.
57
Figure 84
3. Wear/slot/crack
(Figure
85). The blade will
Figure 85
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