Not for
Reproduction
Sharpening the Mower Blades
WARNING
Thrown objects and fire hazard
Grinding mower blades throws sparks and fine metal particles
that are capable of igniting gasoline and gasoline vapors, and
that can injure unprotected eyes.
Be sure all flammable materials are cleared from the area
where grinding will occur.
Always wear safety glasses or goggles when grinding mower
blades.
1.
Sharpen mower blades with a grinder, hand file, or electric
blade sharpener.
2.
Sharpen the blade by removing an equal amount of material
from the cutting edge of each end of the blade.
3.
Keep the original bevel (A, Figure 42) when grinding. DO
NOT change the mower blade bevel.
42
4.
The mower blade should have a maximum of 1/64" (0,40
mm) cutting edge (B) or less.
Balancing the Mower Blades
CAUTION
Thrown objects hazard
An unbalanced mower blade can create excessive vibration
and damage the unit, or cause mower blade failure resulting
in thrown debris.
Be sure blade is balanced before installing.
1.
Clean the mower blade to remove any dried grass or other
debris.
2.
Clamp a nail in a bench vise, hang the mower blade on the
nail, and position the blade in a level horizontal position as
shown in Figure 43.
43
3.
Check the balance of the mower blade. If either end of the
mower blade moves downward is heavier than the other.
Sharpen the heavy end until balance is achieved. See
Sharpening the Mower Blades for sharpening instructions.
4.
Repeat the process until the mower blade remains in the
horizontal, level position.
Installing the Mower Blades
1.
Install each mower blade with the air lifts (C, Figure 44)
pointing up towards the mower deck as shown in Figure 44
and secure with the mower blade mounting bolt (A) and flat
washer (B).
44
2.
Wedge a wooden block (D) between the mower blade and
the mower deck housing to keep the mower blade from
turning and torque the blade mounting bolt to 120 ft. lbs
(163 Nm).
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