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Servicing the Cutting Blades
To ensure a superior quality of cut, keep the blades sharp.
For convenient sharpening and replacement, you may
want to keep extra blades on hand.
Warning
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 (PTO) 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
1. Inspect the cutting edges (Fig. 60). If the edges are not
sharp or have nicks, remove and sharpen the blades.
Refer to Sharpening the Blades on page 44.
2. Inspect the blades, especially the curved area (Fig. 60).
If you notice any damage, wear, or a slot forming in
this area (item 3 in Fig. 60), immediately install a new
blade.
Figure 60
1. Cutting Edge
2. Curved Area
1
2
3
m–151
3. Wear/slot Forming
43
Checking for Bent Blades
1. Rotate the blades until the ends face forward and
backward (Fig. 61). Measure from a level surface to
the cutting edge, position A, of the blades (Fig. 62).
Note this dimension.
Figure 61
Figure 62
2. Rotate the opposite ends of the blades forward.
3. Measure from a level surface to the cutting edge of the
blades at the same position as in step 1. The difference
between the dimensions obtained in steps 1 and 2 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.
Warning
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.
m–1078
m–2539
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