Removing And Installing The Mowing Blade; Sharpening The Mowing Blade; Storage (Winter Break) - Stihl RMA 339 Instruction Manual

– if the measured values are achieved at
one or more places or are outside the
permissible limits.
13.7 Removing and installing the
mowing blade
In order to prevent damage to the
blade fastening screw, use a
suitable socket (22 mm) for
loosening and tightening.
1 Removing:
● Use a suitable wooden block (1) to hold
mowing blade (2) in place.
● Unscrew blade fastening screw (3) and
remove mowing blade (2).
28
2 Installing:
Risk of injury!
The mowing blade must only be
installed as shown, in particular
tabs (6) must point downwards.
Always replace blade fastening
screw (3) when replacing the
mowing blade. The specified torque
when tightening the blade fastening
screw must be strictly observed, as
the secure attachment of the cutting
tool depends on this.
● Clean the blade contact surface and
blade bushing.
● Install mowing blade (2) with the curved
wings pointing upwards. Locating
lugs (4) must be located in recesses (5)
of the mowing blade.
● Use a suitable wooden block (1) to hold
mowing blade (2) in place.
● Apply Loctite 243 to the thread of blade
fastening screw (3).
● Tighten blade fastening screw (3).
Tightening torque:
10 - 15 Nm

13.8 Sharpening the mowing blade

If you do not have the necessary expertise
or auxiliary equipment, you should have
the blade sharpened by a specialist dealer
(STIHL recommends STIHL specialist
dealers).
Operation of the machine is impaired in the
case of an incorrectly sharpened mowing
blade (incorrect sharpening angle,
imbalance, etc.), the cutting performance
(battery running time) may be reduced and
the noise emissions increased.
Sharpening instructions
● Remove the mowing blade. (
● Cool the mowing blade during
sharpening, e.g. with water.
The blade must not be allowed to
display blue colouring, as this would
reduce its cutting quality.
● Sharpen blades evenly to prevent
vibration due to imbalance.
● Observe a sharpening angle of 30°.
● Observe the wear limits. (

13.9 Storage (winter break)

Store the machine in a dry and locked
place that is generally free of dust. Make
sure that it is kept out of the reach of
children.
0478 131 8327 B - EN
13.7)
13.6)