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Checking for a Bent Blade
1. Position the machine on a level surface, raise the cutting
unit, engage the parking brake, put the traction pedal in
neutral, the PTO lever in the Off position, shut the
engine Off, remove the ignition key, and disconnect the
wires from the spark plugs. Block the cutting unit to
prevent it from accidentally falling.
2. Rotate the blade until the ends face forward and
backward. Measure from the inside of the cutting unit to
the cutting edge at the front of the blade (Fig. 29), and
remember this dimension.
Figure 29
3. Rotate the opposite end of the blade forward. Measure
between the cutting unit and cutting edge of the blade at
the same position as in step 2. The difference between
the dimensions obtained in steps 2 and 3 must not
exceed 1/8 in. (3 mm). If the dimension exceeds 1/8 in.
(3 mm), replace the blade because it is bent; refer to
Removing the Cutting Blade, page 21.
Removing the Cutting Blade
The blade must be replaced if a solid object is hit, or the
blade is out-of-balance, worn, or bent. Always use genuine
Toro replacement blades to ensure safety and optimum
performance. Never use blades made by other
manufacturers because they could be dangerous.
Danger
A worn or damaged blade can break, and a piece
of the blade could be thrown into the operator's or
bystander's area, resulting in serious personal
injury or death.
Inspect the blade periodically for wear or
damage.
Do not try to straighten a blade that is bent.
Never weld a broken or cracked blade.
Replace a worn or damaged blade with a new
Toro blade to ensure continued safety
certification of the product.
1. Position the machine on a level surface, raise the cutting
unit, engage the parking brake, put the traction pedal in
neutral, the PTO lever in the Off position, shut the
engine off, remove the ignition key, and disconnect the
wires from the spark plugs. Block the cutting unit to
prevent it from accidentally falling.
2. Grasp the end of the blade using a rag or thickly padded
glove. Remove the blade bolt, anti-scalp cup, and blade
from the spindle shaft (Fig. 30).
1. Blade bolt
3. Install the blade—sail facing toward the cutting
unit—with the anti-scalp cup and blade bolt. Tighten
the blade bolt to 85–110 ft.-lb. (115–149 N m).
Inspecting and Sharpening the
Blade
Two areas must be considered when checking and servicing
the cutting blade: the sail and the cutting edge. Both cutting
edges and the sail, which is the turned up portion opposite
the cutting edge, contribute to a good quality-of-cut. The
sail is important because it pulls grass up straight, thereby
producing an even cut. However, the sail will gradually
wear down during operation, and this condition is normal.
As the sail wears down, the quality-of-cut will degrade
somewhat, although the cutting edges are sharp. The
cutting edge of the blade must be sharp so that the grass is
cut rather than torn. A dull cutting edge is evident when the
tips of the grass appear brown and shredded. Sharpen the
cutting edges to correct this condition.
1. Position the machine on a level surface, raise the cutting
unit, engage the parking brake, put the traction pedal in
neutral, the PTO lever in the Off position, shut the
engine off, remove the ignition key, and disconnect the
wires from the spark plugs. Block the cutting unit to
prevent it from accidentally falling.
2. Examine the cutting ends of the blade carefully,
especially where the flat and curved parts of the blade
meet (Fig. 31-A). Since 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
machine. If wear is noticed (Fig. 31-B), replace the
blade; refer to Removing the Cutting Blade, page 21.
21
2
1
Figure 30
2. Anti-scalp cup
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