Figure 87
1.
Cutting Edge
3.
Wear/slot Forming
2.
Curved Area
4.
Crack
3.
Examine the cutting edges of all of the blades. Sharpen
the cutting edges if they are dull or nicked. Sharpen
only the top of the cutting edge and maintain the
original cutting angle to make sure of sharpness
(Figure 88). The blade will remain balanced if the same
amount of metal is removed from both cutting edges.
DANGER
If the blade is allowed to wear, a slot will form
between the sail and flat part of the blade
(Figure 87). Eventually a piece of the blade
may break off and be thrown from under the
housing, possibly resulting in serious injury
to you or bystanders.
•
Inspect the blade periodically for wear or
damage.
•
Never try to straighten a blade that is bent
or weld a broken or cracked blade.
•
Replace a worn or damaged blade.
Figure 88
1.
Sharpen at original angle
Note:
Remove the blades and sharpen them on a
grinder. After sharpening the cutting edges, install the
blade with the anti-scalp cup and blade bolt; refer to
Removing and Installing the Cutter Blade(s).
Correcting Cutting Unit
Mismatch
If there is mismatch between the blades, on a single cutting
unit, the grass will appear streaked when it is cut. This
problem can be corrected by making sure that the blades are
straight and all of the blades are cutting on the same plane.
1.
Using a 3 foot (1 meter) long carpenters level, find a
level surface on the shop floor.
2.
Raise the height-of-cut to the highest position; refer to
Adjusting the Height-Of-Cut.
3.
Lower the cutting unit onto the flat surface. Remove
the covers from the top of the cutting unit.
4.
Loosen the flange nut securing the idler pulley to
release the belt tension.
5.
Rotate the blades until the ends face forward and
backward. Measure from the floor to the front tip of
the cutting edge. Remember this dimension. Then
rotate the same blade so that the opposite end is
forward, and measure again. The difference between
the dimensions must not exceed 1/8 inch (3 mm). If
the dimension exceeds 1/8 inch (3 mm), replace the
blade because it is bent. Make sure to measure all of
the blades.
53
Summary of Contents for 30447N
Page 57: ...Schematics g014815 Electrical Schematic Rev D 57...
Page 58: ...g017775 Electrical Schematic Rev D 58...
Page 59: ...g017776 Electrical Schematic Rev D 59...
Page 60: ...g017779 Electrical Schematic GM 4000 4100 Rev D 60...
Page 61: ...g017780 Electrical Schematic GM 4010 Rev D 61...
Page 62: ...g017781 Electrical Schematic GM 4110 Rev D 62...
Page 63: ...g017782 Electrical Schematic GM 4010 Rev D 63...
Page 64: ...g017783 Electrical Schematic GM 4110 Rev D 64...
Page 65: ...g017784 Electrical Schematic GM 4110 Cab Rev D 65...
Page 66: ...g017785 Electrical Schematic GM 4110 Cab Rev D 66...
Page 67: ...Hydraulic Schematic Rev B 67...
