Ferris IS600z series Operator's Manual page 25

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2. Using a wrench, remove the bolt securing the blade to the
spindle.
Inspecting the Mower Blades
DANGER
Thrown objects hazard
Avoid injury: a worn or damaged mower blade can break and
a piece of the blade could be thrown into the operator's area
or bystander's area resulting in serious personal injury or
death.
• Inspect the mower blade every 25 hours or at least once
per year.
• If the mower blade hits a solid object, stop the engine
immediately and inspect the mower blades.
• Never weld or straighten bent mower blades.
1. Remove the mower blade from the unit. See Removing the
Mower Blades.
2. Inspect the mower blade (Figures 28 and 29). Discard the
mower blade if it has any of the following conditions:
• More than .5" (12,7 mm) of the mower blade metal has
been removed from previous sharpening or wear (A,
Figure 28)
• The air lifts are excessively eroded (A, Figure 29) and
the notch (B) is .25" (6,35 mm) deep or greater.
• The mower blade is broken or bent.
28
29
3. If the cutting edges are not sharp or have nicks, sharpen
the blades. See Sharpening the Mower Blades.
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 30) when grinding. DO
NOT change the mower blade bevel.
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