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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.
Blade Safety
A worn or damaged blade can break, and a piece of
the blade could be thrown toward you or bystanders,
resulting in serious personal injury or death. Trying to
repair a damaged blade may result in discontinued
safety certification of the product.
•
Inspect the blades periodically for wear or damage.
•
Use care when checking the blades. Wrap the
blades or wear gloves, and use caution when
servicing the blades. Only replace or sharpen the
blades; never straighten or weld them.
•
On multi-bladed machines, take care as rotating 1
blade can cause other blades to rotate.
Before Inspecting or Servicing the
Blades
1.
Park the machine on a level surface, disengage
the blade-control switch (PTO), and engage the
parking brake.
2.
Shut off the engine, remove the key, and
disconnect the spark-plug wires from the spark
plugs.
Inspecting the Blades
Service Interval: Before each use or daily
1.
Inspect the cutting edges
2.
If the edges are not sharp or have nicks, remove
and sharpen the blade; refer to
Blades (page
61).
3.
Inspect the blades, especially in the curved area.
4.
If you notice any cracks, wear, or a slot forming
in this area, immediately install a new blade
(Figure
93).
(Figure
93).
Sharpening the
1. Cutting edge
2. Curved area
Checking for Bent Blades
1.
Rotate the blades until the ends face forward
and backward.
2.
Measure from a level surface to the cutting
edge, position A, of the blades
1. Measure here from blade
to hard surface
3.
Rotate the opposite ends of the blades forward.
4.
Measure from a level surface to the cutting edge
of the blades at the same position as in step
above.
Note:
The difference between the dimensions
obtained in steps
mm (1/8 inch).
Note:
If this dimension exceeds 3 mm (1/8
inch), the blade is bent and must be replaced.
60
Figure 93
3. Wear/slot forming
4. Crack
(Figure
94).
Figure 94
2. Position A
2
and
4
must not exceed 3
g006530
g000975
2
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