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Before Inspecting or Servicing the
Blades
Park the machine on a level surface, disengage the
blades and set the parking brake. Turn the ignition
key to off. Remove the key and disconnect the
spark plug wires from the spark plugs.
Inspecting the Blades
Inspect the blades every 8 hours.
1. Inspect the cutting edges (Figure 46). If the
edges are not sharp or have nicks, remove and
sharpen the blades. Refer to Sharpening the
Blades.
Figure 46
1. Cutting Edge
2. Sail
2. Inspect the blades, especially the curved area
(Figure 46). If you notice any cracks, wear, or a
slot forming in this area (item 3 in Figure 46),
immediately install a new blade.
3. Wear/slot forming in
curved area
4. Crack in the curved area
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. Measure from a level surface
to the cutting edge, position A, of the blades
(Figure 47 ). Note this dimension.
Figure 47
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.
A blade that is bent or damaged could
break apart and could seriously injure or
kill you or bystanders.
• Always replace bent or damaged
blade with a new blade.
• Never file or create sharp notches in
the edges or surfaces of blade.
37
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