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1.
Position the machine on a level surface. Raise
the cutting unit, engage the parking brake, put
the traction pedal in neutral, put the PTO lever
in the Off position, stop the engine, and remove
the ignition key.
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 mower. If wear
is noticed
(Figure
Figure 113
1. Cutting Edge
2. Curved Area
3.
Examine the cutting edges of all of the 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.
113). Since sand and
113), replace the blade.
3. Wear/slot Forming
4. Crack
(Figure
114). The blade will
DANGER
If the blade is allowed to wear, a slot
will form between the sail and flat part
of the blade. Eventually a piece of the
blade may break off and be thrown from
under the housing, possibly resulting in
serious injury to you or bystanders.
• Inspect the blade periodically for wear
or damage.
• Never try to straighten a blade that
is bent or weld a broken or cracked
blade.
• Replace a worn or damaged blade.
1. Sharpen at original angle
Note:
Remove the blades and sharpen them
on a grinder. After sharpening the cutting edges,
install the blade with the anti-scalp cup and
blade bolt; refer to Removing and Installing the
Cutter Blade(s).
Correcting Cutting Unit
Mismatch
If there is mismatch between the blades, on a single
cutting unit, the grass will appear streaked when it is
cut. This problem can be corrected by making sure
that the blades are straight and all of the blades are
cutting on the same plane.
1.
Using a 1 meter (3 foot) long carpenters level,
g004653
find a level surface on the shop floor.
2.
Raise the height-of-cut to the highest position;
refer to Adjusting the Height-Of-Cut.
3.
Lower the cutting unit onto the flat surface.
Remove the covers from the top of the cutting
unit.
4.
Loosen the flange nut securing the idler pulley
to release the belt tension.
5.
Rotate the blades until the ends face forward
and backward. Measure from the floor to the
71
Figure 114
g000276
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