Maintenance; Repairing - Stihl RMA 253 Gebrauchsanleitung

English

17 Maintenance

17.1 Removing and Attaching the
Blade
17.1.1 Removing the Blade
► Switch the lawn mower off, pull out the activa‐
tion key and remove the battery.
► Upend the lawn mower.
► Block blade (1) using a piece of wood (2).
► Unscrew screw (3) in the direction of the arrow
and remove together with washer (4).
► Remove blade (1).
► Discard screw (3) and washer (4).
Use a new screw and washer to attach
blade (1).
17.1.2 Attaching the Blade
► Switch the lawn mower off, pull out the activa‐
tion key and remove the battery.
► Upend the lawn mower.
► Place new washer (1) on new screw (2) with
the convex side facing outwards.
► Apply Loctite 243 thread locker to the thread
of screw (2).
► Position blade (3) so that the raised areas on
the contact area engage in the notches.
► Screw in screw (2) together with washer (1).
36
► Block blade (3) using a piece of wood (4).
► Tighten screw (2) to 65 Nm.
17.2 Sharpening and Balancing the
Blade
Sharpening and balancing the blade correctly
requires a lot of practice.
STIHL recommends having the blade sharpened
and balanced by a STIHL specialist dealer.
WARNING
■ The cutting edges of the blade are sharp. This
may result in the user cutting themselves.
► Wear work gloves made from resistant
material.
► Switch the lawn mower off, pull out the activa‐
tion key and remove the battery.
► Upend the lawn mower.
► Remove the blade.
► Sharpen the blade. Observe the sharpening
angle and cool the blade,
Bluing of the blade during sharpening is not
permitted.
► Attach the blade.
► If anything is unclear: consult a STIHL special‐
ist dealer.

18 Repairing

18.1 Repairing the Lawn Mower
The user should not repair the lawn mower or
blade themselves.
► If the lawn mower or blade is damaged: do not
use the lawn mower or blade and consult a
STIHL specialist dealer.
► If warning signs are illegible or damaged: have
the warning signs replaced by a STIHL spe‐
cialist dealer.
17 Maintenance
20.2.
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