Stihl RMA 410 C Manual De Instrucciones página 27

Mulching blade
a
a
b
Use a caliper gauge to check blade
N
thickness at a minimum of 5
different points.
Place a ruler on the rear edge of the
N
blade and measure how far it has
been filed back.
Blade thickness must not be less than
a = 2 mm (0.08 in) at any point.
Blade width at the cutting edges must
not be less than b = 1.58 in (40 mm).
RMA 410 C
Removing the Cutting Blade
3
2
Use a suitable piece of wood (2) to
N
block the cutting blade (1).
Unscrew the blade mounting
N
b
screw (3) and remove the blade.
Check the blade mounting screw for
N
damage.
WARNING
Replace a damaged mounting screw.
Sharpening Instructions
STIHL recommends that you have the
blade resharpened by your STIHL
servicing dealer. An incorrectly ground
cutting blade (wrong sharpening angle,
out-of-balance) can cause running
problems.
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
1
Clean mounting faces and
N
thread (1).
3
4
2
Fit the cutting blade (2) with the
N
upturned ends facing up – the
retaining lugs (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
for damage.
WARNING
Replace a damaged mounting screw.
Coat mounting screw with
N
®
Loctite 243
it and tighten it down to a torque of
12 Nm (8.9 lbf.ft).
English
2
6
3
5
™ ® ™
or Loctite 242 , fit
25