Inspecting And Sharpening The Blade; Checking And Correcting Mismatch Of Blades - Toro 30555 Operator's Manual

Inspecting and Sharpening the
Blade
When you check and service the cutting blade, consider
especially 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 upward to produce an even
cut. However, the sail gradually wear down during operation,
and this condition is normal. As the sail wears down, the
quality-of-cut degrades somewhat, even though 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. Move the machine onto a level surface, raise the mower
deck, engage the parking brake, put the traction pedal
into the N
EUTRAL
O position, shut off the engine, and remove the key
FF
from the ignition.
2. Disconnect the spark plug wires from the spark plugs
3. Block the mower deck to prevent it from moving.
4. Examine the cutting ends of the blade carefully,
especially where the flat and curved parts of the blade
meet (Figure 40). 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 the blade is worn
blade; refer to Removing the Cutting Blade (page
Figure 40
1. Cutting edge
2. Curved area/sail
position, the PTO lever into the
(Figure 40), replace the
3. Wear/slot forming
4. Crack
WARNING
If the blade is allowed to wear, a slot can form
between the sail and flat part of the blade
(Figure
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.
• Replace a worn or damaged blade with a
new Toro blade to ensure continued safety
certification of the product.
5. Examine the cutting edges of all blades. Sharpen the
cutting edges if they are dull or nicked. Sharpen only
the top side of the cutting edge and maintain the
original cutting angle to ensure sharpness
The blade remain balanced if the same amount of metal
is removed from both cutting edges.
1. Sharpen at original angle
19).
Note: Remove the blades and sharpen them on a
grinder; refer to
cutting edges, install the blade with the anti-scalp cup
and blade bolt. The blade sails must be on top of the
blade. Tighten the blade bolt to 115 to 149 N∙m (85
to 110 ft-lb).
Checking and Correcting
Mismatch of Blades
If one cutting blade cuts lower than the others, correct them
as follows:
1. Lower the mower deck onto a level surface, engage the
parking brake, put the traction pedal into the N
position, the PTO lever into the O
the engine, and remove the key from the ignition.
2. Ensure that the tire pressure in all of the tires is equal.
3. Raise the height of cut to the 102 mm (4 inches)
position; refer to
4. Rotate the blades so that the tips line up with 1 another.
The tips of the adjacent blades must be within 3 mm
(1/8 inch) of each other. If the tips are not within 3
mm (1/8 inch) of each other, proceed to step
20
40). Eventually, a piece of the blade
Figure 41
Safety (page 3). After sharpening the
FF
Adjusting the Height of Cut (page
(Figure 41).
EUTRAL
position, shut off
14).
11 and