Toro 74272CP, Руководство оператора

Страница: 54 / 64

Sharpening the Blades
When sharpening blade, pieces of blade
could be thrown and cause serious injury.
Wear proper eye protection when sharpening
blade.
1. Use a file to sharpen the cutting edge at both
ends of the blade (Figure 74). Maintain the
original angle. The blade retains its balance if
the same amount of material is removed from
both cutting edges.
Figure 74
1. Sharpen at original angle
2. Check the balance of the blade by putting it on
a blade balancer (Figure 75). If the blade stays
in a horizontal position, the blade is balanced
and can be used. If the blade is not balanced,
file some metal off the end of the sail area only
(Figure 76). Repeat this procedure until the
blade is balanced.
Figure 75
1. Blade 2. Balancer
Installing the Blades
1. Install the blade onto the spindle shaft
(Figure 76).
Important:
The curved part of the blade
must be pointing upward toward the inside
of the mower to ensure proper cutting.
2. Install the spring disk and blade bolt. The
spring disk cone must be installed toward the
bolt head (Figure 76).
Figure 76
1. Sail Area of Blade 4. Blade Bolt
2. Blade 5. Cone Towards Bolt Head
3. Spring Disk
3. Torque the blade bolt to 85-110 ft-lb
(115-150 N
⋅
m).
Replacing the Grass
Deector
An uncovered discharge opening could
allow the lawn mower to throw objects in
the operator’s or bystander’s direction and
result in serious injury. Also, contact with
the blade could occur.
• Never operate the lawn mower unless
you install a cover plate, a mulch plate, or
a grass chute and catcher.
• Make sure the grass deflector is in the
down position.
1. Remove the locknut, bolt, spring and spacer
holding the deflector to the pivot brackets
(Figure 77).
2. Remove the damaged or worn grass deflector.
3. Place the spacer and spring onto the grass
deflector. Place the L end of the spring behind
the deck edge.
Note:
Make sure the L end of the spring is
installed behind the deck edge before installing
the bolt as shown in Figure 77
4. Install the bolt and nut.
5. Place the J hook end of the spring around the
grass deflector (Figure 77).
54