Toro 30604, Руководство оператора

Страница: 55 / 60

Blade Maintenance
Checking for a Bent Blade
After striking a foreign object, inspect the machine for
damage and make repairs before restarting and operating the
equipment. Torque all the spindle pulley nuts to 176 to 203
N-m (130 to 150 ft-lb).
1. Position the machine on a level surface. Raise the
cutting unit, engage the parking brake, put the traction
pedal in neutral, put the PTO lever in the Off position,
stop the engine, and remove the ignition key. Block the
cutting unit to prevent it from accidentally falling.
2. Rotate the blade until the ends face forward and
backward (
Figure 80 ). Measure from the inside of the
cutting unit to the cutting edge at the front of the blade.
Remember this dimension.
Figure 80
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 3 mm (1/8 inch). If the dimension
exceeds 3 mm (1/8 inch), the blade is bent and must be
replaced; refer to Removing and Installing the Cutter
Blade.
Removing and Installing the
Cutter Blade(s)
The blade must be replaced if a solid object is hit, the blade
is out of balance, or if the blade is bent. Always use genuine
Toro replacement blades to be sure of safety and optimum
performance. Never use replacement blades made by other
manufacturers because they could be dangerous.
1. Raise the cutting unit to the highest position, engage
the parking brake, stop the engine, and remove the
ignition key. 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 (
Figure 81 ).
3. Install the blade, anti-scalp cup, and blade bolt. 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 the
spindle pulley nuts to 115 to 149 N-m (85 to 110 ft-lb).
Figure 81
1. Blade bolt 2. Anti-scalp cup
Inspecting and Sharpening the
Cutter Blade(s)
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. Trying to repair a damaged blade
may result in discontinued safety certification of
the product.
• Inspect the blade periodically for wear or
damage.
• Never try to straighten a blade that is bent or
weld a broken or cracked blade.
• Replace a worn or damaged blade.
Two areas must be considered when checking and servicing
the cutter 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 lifts the 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, put the PTO lever in the Off position,
stop 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 82 ). 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
mower. If wear is noticed (
Figure 82 ), replace the blade.
55