Removing The Blades - Toro 74388 Operator's Manual

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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 (rotating it counter-clockwise), curved
washer, blade stiffener, and blade from the spindle shaft
(Figure 46).
G009680
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Figure 45
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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 47). 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 48). 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 47). Repeat this procedure
until the blade is balanced.
1. Blade
Installing the Blades
1. Install the blade onto the spindle shaft (Figure 46).
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 (rotating it
clockwise) (Figure 46).
3. Torque the blade bolt to 35-65 ft-lb (47-88 N-m).
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G015292
Figure 46
4. Blade bolt
5. Blade stiffener
Figure 47
Figure 48
2. Balancer