Removing The Blades - Toro 74621 Operator's Manual

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2
1. Opposing blade edge, in position for measuring
2. Level surface
3. Second measured distance between blade and surface (B)
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

The blades must be replaced if a solid object is hit,
if the blade is out of balance, or the blade 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, blade stiffener,
and blade from the spindle shaft (Figure 45).
G009680
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Figure 44
1. Sail area of blade
2. Blade
3. Curved washer
Sharpening the Blades
1. Use a file to sharpen the cutting edge at both ends
of the blade (Figure 46). Maintain the original angle.
The blade retains its balance if the same amount of
material is removed from both cutting edges.
1. Sharpen at original angle
2. Check the balance of the blade by putting it on a
blade balancer (Figure 47). 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 46). Repeat this
procedure until the blade is balanced.
1. Blade
Installing the Blades
1. Install the blade onto the spindle shaft (Figure 45).
Important: The curved part of the blade must
be pointing upward toward the inside of the
mower to ensure proper cutting.
2. Install the blade stiffener, the curved washer (cupped
side toward the blade) and the blade bolt (Figure 45).
3. Torque the blade bolt to 35-65 ft-lb (47-88 N-m).
35
Figure 45
4. Blade bolt
5. Blade stiffener
Figure 46
Figure 47
2. Balancer