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A worn or damaged blade can break, and a
piece of the blade could be thrown into the
operator's or bystander's area, resulting in
serious personal injury or death.
• Inspect the blade periodically for wear
or damage.
• Replace a worn or damaged blade.
Before Inspecting or Servicing the
Blades
Park the machine on a level surface, disengage
the blade control bail and set the parking brake.
Turn the ignition key to off. Remove the key and
disconnect the spark plug wire(s) from the spark
plug(s).
Inspecting the Blades
Inspect the blades every 8 hours.
1. Inspect the cutting edges (Figure 71). If the
edges are not sharp or have nicks, remove and
sharpen the blades. Refer to Sharpening the
Blades.
Figure 71
1. Cutting Edge
2. Curved Area
2. Inspect the blades, especially the curved area
(Figure 71). If you notice any damage, wear, or
a slot forming in this area (item 3 in Figure 71),
immediately install a new blade.
3. Wear/slot Forming
Checking for Bent Blades
1. Disengage the PTO, move the motion control
levers to the neutral locked position and set
the parking brake.
2. Stop the engine, remove the key, and wait for
all moving parts to stop before leaving the
operating position.
3. Rotate the blades until the ends face forward
and backward (Figure 72). Measure from a
level surface to the cutting edge, position A, of
the blades (Figure 72). Note this dimension.
Figure 72
1. Measure here from blade
to hard surface
4. Rotate the opposite ends of the blades forward.
5. Measure from a level surface to the cutting
edge of the blades at the same position as
in step 3 above. The difference between the
dimensions obtained in steps 3 and 4 must not
exceed 1/8 inch (3 mm). If this dimension
exceeds 1/8 inch (3 mm), the blade is bent
and must be replaced; refer to Removing the
Blades and Installing the Blades.
56
2. Position A
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