Toro 30643, Operator'S Manual

Page: 66 / 72

1. Position the machine on a level surface, raise the mower
deck, engage the parking brake, put the traction pedal
in
NEUTRAL
, put the PTO lever in the O
FF
position,
shut off 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 89 ).
Note:
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 mower.
If wear is noticed (
Figure 89 ), replace the blade.
Figure 89
1. Cutting edge 3. Wear/slot forming
2. Curved area 4. Crack
3. Examine the cutting edges of all the blades and sharpen
the cutting edges if they are dull or nicked (
Figure 90 ).
Note:
Sharpen only the top of the cutting edge and
maintain the original cutting angle to ensure sharpness
(
Figure 90 ). The blade will remain balanced if the same
amount of metal is removed from both cutting edges.
Figure 90
1. Sharpen at the 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 Mower Blade(s) (page 65) .
Correcting a Mower-Deck
Mismatch
If there is mismatch between the blades, on a single mower
deck, the grass will appear streaked when it is cut. This
problem can be corrected by ensuring that the blades are
straight and all of the blades are cutting on the same plane.
1. Park the machine on a level surface of the shop floor.
2. Raise the height-of-cut to the highest position; refer to
Adjusting the Height-of-Cut (page 25) .
3. Lower the mower deck onto the flat surface and
remove the covers from the top of the mower deck.
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 and measure from the floor to the front tip
of the cutting edge.
Note:
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.
Note:
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
7 and add shims between
the spindle housing and the bottom of the mower deck.
7. Remove the bolts, flat washers, lock washers, and nuts
from the outer spindle in the area where the shims
must be added.
Note:
To raise or lower the blade, add a shim, Part No.
3256-24, between the spindle housing and the bottom
of the mower deck. Continue to check the alignment
of the blades and add shims until the tips of the blades
are within the required dimension.
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