WARNING
A blade that is bent or damaged could break
apart and could seriously injure or kill you or
bystanders.
•
Always replace bent or damaged blade
with a new blade.
•
Never file or create sharp notches in the
edges or surfaces of blade.
A.
If the difference between A and B is greater
than 1/8 inch (3mm) replace the blade with a
new blade. Refer to Removing the Blades and
Installing the Blades.
Note:
If a bent blade is replaced with a new one
and the dimension obtained continues to exceed
1/8 inch (3mm), the blade spindle could be bent.
Contact an Authorized Toro Dealer for service.
B.
If the variance is within constraints, move to the
next blade.
Repeat this procedure on each blade.
Removing the Blades
Blades must be replaced if a solid object is hit, if the blade is
out of balance or is bent. To ensure optimum performance
and continued safety conformance of the machine, use
genuine Toro replacement blades. Replacement blades made
by other manufacturers may result in non-conformance with
safety standards.
Hold the blade end using a rag or thickly-padded glove.
Remove the blade bolt, curved washer, and blade from the
spindle shaft (Figure 66).
1
2
3
4
G010341
Figure 66
1.
Sail Area of Blade
3.
Curved washer
2.
Blade
4.
Blade Bolt
Sharpening the Blades
WARNING
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 67). Maintain the original angle. The
blade retains its balance if the same amount of material
is removed from both cutting edges.
Figure 67
1.
Sharpen at original angle
2.
Check the balance of the blade by putting it on a blade
balancer (Figure 68). 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 66). Repeat this procedure
until the blade is balanced.
Figure 68
1.
Blade
2.
Balancer
Installing the Blades
1.
Install the blade onto the spindle shaft (Figure 66).
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 66).
Torque the blade bolt to 100-110 ft-lb (135-150 N-m).
45
Summary of Contents for 74920 TITAN ZX4820
Page 13: ...119 8986 1 Fuel 2 Full 3 Half 4 Empty 13 ...
Page 55: ...Schematics G014723 Wire Diagram Rev B 55 ...
Page 56: ...Notes 56 ...
Page 57: ...Notes 57 ...
Page 58: ...Notes 58 ...
