Stihl RMA 460 Manual De Instrucciones página 28

English
c
b
Use a caliper gauge to check blade
N
thickness at a minimum of 5
different points.
Place a ruler on the front edge of the
N
blade and measure how far it has
been filed back.
Blade thickness must not be less than
a = 2 mm (0.079 in.) at any point.
Angle 'b' must be 30°.
Blade width at its narrowest point must
be at least c = 45 mm (1.772 in.).
Removing the Cutting Blade
2
Use a suitable piece of wood (2) to
N
block the cutting blade (1).
Take out the mounting screw (3)
N
and remove the washer (4).
Check the blade mounting screw (3)
N
and washer (4) for damage.
Remove the cutting blade (1).
N
26
Sharpening Instructions
WARNING
STIHL recommends that you have the
blade resharpened by your STIHL
a
servicing dealer. An incorrectly ground
cutting blade (wrong sharpening angle,
out-of-balance) can cause operational
problems and could cause the blade to
break or fracture, resulting in severe
personal injury or death to the operator
or bystanders.
Cool the cutting blade during
N
resharpening, e.g. with water.
Sharpen the cutting blade uniformly
N
to avoid out-of-balance and
vibrations.
Sharpen the cutting edges to an
N
angle of 30°.
Use fine emery paper to remove any
N
burrs from the cutting edges after
resharpening.
Installing the Cutting Blade
1
4
3
Clean mounting faces and
N
thread (1).
5
Mount the cutting blade (2) with the
N
upturned ends facing toward the
mower deck – the arrows (3) must
engage the holes (4) in the blade.
Use a suitable piece of wood (5) to
N
block the blade.
Check the blade mounting screw (6)
N
and washer (7) for damage.
WARNING
Replace a damaged mounting screw
and washer.
Insert the blade mounting screw (6)
N
with washer (7), tighten it down to a
torque of 25.8 lbf. ft. (35 Nm) and
secure with Loctite
®
Loctite 242
WARNING
To reduce the risk of injury, install the
blade mounting screw with Loctite and
1
tighten it down to the specified torque.
2
3
4
7
6
® ™
243 or
™
.
RMA 460