17 Repairing
► Apply Loctite 243 thread locker to the thread
of new screw (1).
► Position blade (2) so that the raised areas on
contact area (3) engage in notches (4).
► Screw in screw (1).
► Block blade (1) using a piece of wood (2).
► Tighten screw (3) to 14 Nm.
16.2
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.
18 Troubleshooting
18.1
Remedying errors in the lawn mower or battery
Error
LEDs on the
battery
The lawn mower
1 LED flashes
does not start
green.
when switched
on.
1 LED lights up
red.
3 LEDs flash
red.
0478-131-9929-A
The current addresses of the specialist dealers
can be found under the respective STIHL country
representative at www.stihl.com.
■ The cutting edges of the blade are sharp. This
may result in the user cutting themselves.
► Wear protective gloves.
► Switch the lawn mower off 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.
17 Repairing
17.1
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.
Cause
State of charge of the
battery is too low.
The battery is too
warm or too cold.
There is an error in
the lawn mower.
WARNING
Repairing the Lawn Mower
Remedy
► Charge battery as described in the User
Manual for chargers STIHL AL 101, 301,
501.
► Remove the battery.
► Allow the battery to cool down or warm
up.
► Remove the battery.
► Clean the electrical contacts in the bat‐
tery compartment.
► Insert the battery.
► Switch on the lawn mower.
► If 3 LEDs continue to flash red: Do not
use the lawn mower and instead consult
a STIHL authorized dealer.
English
19.2.
39