Mower Deck Leveling - Toro 74920 Operator's Manual

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Figure 66
1. Sail Area of Blade
2. Blade
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.
G010341
3. Curved washer
4. Blade Bolt
1. Blade
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).

Mower Deck Leveling

Check to ensure the mower deck is level any time you
install the mower or when you see an uneven cut on
your lawn.
The mower deck must be checked for bent blades
prior to leveling; any bent blades must be removed
and replaced. Refer to the Checking for Bent Blades
procedure before continuing.
The mower deck must be leveled side-to-side first then
the front to rear slope can be adjusted.
Requirements:
• The machine must be on a level surface.
• All four tire must be properly inflated. Refer to
Checking the Tire Pressure in the Drive System
Maintenance section.
Checking Side-to-Side Level
The mower blades must be level from side to side.
Check the side-to-side level any time you install the
mower or when you see an uneven cut on your lawn.
1. Park the machine on a level surface and disengage
the blade control switch.
2. Move the motion control levers outward to the
neutral lock position, stop the engine, remove the
key, set the parking brake and wait for all moving
parts to stop before leaving the operating position.
3. Carefully rotate the blades side to side.
4. Measure between the outside cutting edges and
the flat surface (Figure 69). If both measurements
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Figure 68
2. Balancer