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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.
Figure 112
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,
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
front tip of the cutting edge. Remember this
dimension. Then rotate the same blade so that
the opposite end is forward, and measure again.
The difference between the dimensions must
not exceed 3 mm (1/8 inch). If the dimension
exceeds 3 mm (1/8 inch), replace the blade
because it is bent. Make sure to measure all of
the blades.
6.
Compare the measurements of the outer blades
with the center blade. The center blade must not
be more than 10 mm (3/8 inch) lower than the
outer blades. If the center blade is more than
10 mm (3/8 inch) lower than the outer blades,
proceed to step
spindle housing and the bottom of the cutting
unit.
7.
Remove the bolts, flat washers, lock washers,
and nuts from the outer spindle in the area
where the shims must be added. To raise or
lower the blade, add a shim, Part No. 3256-24,
between the spindle housing and the bottom of
the cutting unit. Continue to check the alignment
of the blades and add shims until the tips of the
blades are within the required dimension.
g000276
Important:
shims at any one hole location. Use
decreasing numbers of shims in adjacent
holes if more than one shim is added to any
one hole location.
8.
Adjust the idler pulley and install the belt covers.
71
7
and add shims between the
Do not use more than three
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