Toro 31974, Operator'S Manual

Page: 19 / 28

Servicing the Cutting
Blades
Blade Safety
A worn or damaged blade can break, and a piece of
the blade could be thrown toward you or bystanders,
resulting in serious personal injury or death.
•
Inspect the blade periodically for wear or damage.
•
Use care when checking the blades. Wrap the
blades or wear gloves, and use caution when
servicing the blades. Only replace or sharpen the
blades; never straighten or weld them.
•
On multi-bladed machines, take care as rotating 1
blade can cause other blades to rotate.
Checking for a Bent Blade
After striking a foreign object, inspect the machine
for damage and make repairs before starting
and operating the equipment. Torque all of the
spindle-pulley nuts to 176 to 203 N∙m (130 to 150
ft-lb).
1. Park the machine on a level surface, raise the
cutting unit to the T
RANSPORT
position, engage
the parking brake, shut off the engine, and
remove the key.
2. Raise the cutting unit to the S
ERVICE
position;
refer to your traction unit Operator’s Manual .
3. Rotate the blade until the ends face forward and
backward and measure from the inside of the
cutting unit to the cutting edge at the front of the
blade (
Figure 23 ).
Note:
Remember this dimension.
g004740
Figure 23
4. Rotate the opposite end of the blade forward
and measure between the cutting unit and
cutting edge of the blade at the same position
as in step
3 .
Note:
The difference between the dimensions
obtained in steps 3 and 4 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 Cutting-Unit
Blade(s) (page 19) .
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 T
RANSPORT
position, engage
the parking brake, shut off the engine, and
remove the key.
2. Raise the cutting unit to the S
ERVICE
position;
refer to your traction unit Operator’s Manual .
3. Grasp the end of the blade using a rag or
thickly-padded glove.
4. Remove the blade bolt, bushing, and blade from
the spindle shaft (
Figure 24 ).
g299661
Figure 24
1. Blade 3. Blade bolt
2. Bushing
5. Install the blade, bushing, 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
spindle-pulley nuts to 115 to 149 N∙m (85 to 110
ft-lb).
Inspecting and Sharpening the
Cutting Unit Blade(s)
Both cutting edges and the sail, which is the turned-up
portion opposite of the cutting edge, contribute to a
good quality of cut.
Maintain sharp blades throughout the cutting season.
Sharp blades create a clean cut without tearing or
shredding the grass blades.
19