Toro 30873, Operator'S Manual

Page: 65 / 72

5. Rotate the marked end of the blade to the 3 and
9 o’clock positions (
Figure 82 ) and measure the
heights.
6. Compare the 12 o’clock measured height to the
height-of-cut setting. It should be within 0.7 mm
(0.030 inch). The 3 and 9 o’clock heights should
be 1.6 to 6.0 mm (0.060 to 0.240 inch) higher
than the 12 o’clock setting and within 2.2 mm
(0.090 inch) of each other.
If any of these measurements are not within
specification, proceed to
Adjusting the Blade Plane
(page 65) .
Adjusting the Blade Plane
Start with the front adjustment (change 1 bracket at a
time).
1. Remove the height-of-cut bracket, (front, left, or
right) from the cutting-unit frame (
Figure 83 ).
2. Adjust 1.5 mm (0.060 inch) shims and/or 0.7
mm (0.030 inch) shims between the cutting-unit
frame and bracket to achieve the desired height
setting (
Figure 83 ).
g011354
Figure 83
1. Height-of-cut bracket 2. Shims
3. Install the height-of-cut bracket to the cutting-unit
frame with the remaining shims assembled
below the height-of-cut bracket.
4. Secure the socket-head bolt/spacer and flange
nut.
Note:
Socket-head bolt/spacer are held
together with thread-locking adhesive to prevent
the spacer from falling inside the cutting-unit
frame.
5. Verify the 12 o’clock height and adjust if needed.
6. Determine if only 1 or both (right and left)
height-of-cut brackets need to be adjusted.
Note:
If the 3 or 9 o’clock side is 1.6 to 6.0 mm
(0.060 to 0.240 inch) higher than the new front
height then no adjustment is needed for that
side. Adjust the other side to within ± 2.2 mm
(0.090 inch) of the correct side.
7. Adjust the right and/or left height-of-cut brackets
by repeating steps
1 through 4 .
8. Secure the carriage bolts and flange nuts.
9. Verify the 12, 3, and 9 o’clock heights.
Removing and Installing
the Cutting-Unit Blade(s)
Replace the blade if it hits a solid object, is out
of balance, or is bent. Always use genuine Toro
replacement blades to ensure safety and optimum
performance.
1. Park the machine on a level surface, raise the
cutting unit to the highest position, engage the
parking brake, shut off the engine, and remove
the key.
Note:
Block the cutting unit to prevent it from
accidentally falling.
2. Grasp the end of the blade using a rag or
thickly-padded glove.
3. Remove the blade bolt, anti-scalp cup, and
blade from the spindle shaft (
Figure 84 ).
g011355
Figure 84
1. Blade bolt 2. Anti-scalp cup
4. Install the blade, anti-scalp cup, and blade bolt
and tighten the blade bolt to 115 to 149 N∙m (85
to 110 ft-lb).
Important:
The curved part of the blade
must be pointing toward the inside of the
cutting unit to ensure proper cutting.
Note:
After striking a foreign object, torque all
of the spindle-pulley nuts to 115 to 149 N∙m (85
to 110 ft-lb).
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