Operation Manual

RMA 410 C
English
25
Mulching blade
N Use a caliper gauge to check blade
thickness at a minimum of 5
different points.
N Place a ruler on the rear edge of the
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).
Removing the Cutting Blade
N Use a suitable piece of wood (2) to
block the cutting blade (1).
N Unscrew the blade mounting
screw (3) and remove the blade.
N Check the blade mounting screw for
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.
N Cool the cutting blade during
resharpening, e.g. with water.
N Sharpen the cutting blade uniformly
to avoid out-of-balance and
vibrations.
N Sharpen the cutting edges to an
angle of 30°.
N Use fine emery paper to remove any
burrs from the cutting edges after
resharpening.
Installing the Cutting Blade
N Clean mounting faces and
thread (1).
N Fit the cutting blade (2) with the
upturned ends facing up – the
retaining lugs (3) must engage the
holes (4) in the blade.
N Use a suitable piece of wood (5) to
block the blade.
N Check the blade mounting screw (6)
for damage.
WARNING
Replace a damaged mounting screw.
N Coat mounting screw with
Loctite
®
243
™
or Loctite
®
242
™
, fit
it and tighten it down to a torque of
12 Nm (8.9 lbf.ft).
a
a
0000-GXX-0809-A0
b
b
3
2
0000-GXX-0810-A0 KN
1
0000-GXX-0811-A0 KN
1
2
3
6
5
0000-GXX-0812-A0 KN
2
3
4