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CHECKING AND CORRECTING MIS-
MATCH OF BLADES
If there is mismatch between the blades, the grass will appear
streaked when it is cut. This problem can be corrected by making
sure the blades are straight and all blades are cutting on the same
plane.
1.
Using a 1-meter long carpenters level, find a flat surface on
the shop floor.
2.
Set the rear caster wheels in the upper hole of the caster forks
and adjust the height of cut so all six height-of-cut spacers are
below the caster arm.
3.
Lower the cutting unit onto a flat surface. Remove the covers
from the top of the cutting unit. Loosen the idler pulleys to
release tension against all three belts.
4.
Rotate blades until the ends face forward and backward.
Measure from the floor to the front tip of the cutting edge and
remember this dimension . Then rotate same blade so its
opposite end is forward and measure again. The difference
between dimensions must not exceed 3 mm. If the difference
exceeds 3 mm, replace the blade because it is bent. Make sure
to measure all three blades.
5.
Compare measurements of outer blades with the center blade.
Center blade must not be more than 10 mm lower than outer
blades. If center blade is more than 10 mm lower than outer
blades, go to step 7 and add shims between the spindle hous-
ing and the bottom of the cutting unit.
6.
Rotate the blades so the tips line up with one another. Tips of
the adjacent blades must be within 3 mm of each other. If tips
are not within 3 mm of each other, go to step 7 and add shims
between the spindle housing and the bottom of the cutting
unit.
7.
Remove the capscrews, flatwashers, lockwashers and nuts
from outer spindle, in the area where 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 blade alignment and add shims
until the tips of blades are within the required dimension.
IMPORTANT: Do not use more than three shims at any
one hole location. Use decreasing numbers of shims in
adjacent holes if more than one shim is added to any one
18
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