10 Testing the Chain Saw and Battery
► Hold the saw with your left hand on the front handle – wrap
your thumb around the handlebar.
► Depress the lockout button (2) with your thumb and hold it
there.
► Depress the trigger lockout (1) with your hand and hold it
there.
► Pull the trigger (3) with your index finger and hold it there.
The motor is accelerated and the chain rotates. Release
the lockout button (2).
9.2
Switching Off
► Release the trigger and trigger lockout lever.
The chain stops rotating.
► If the chain continues to rotate: Engage the chain brake,
remove the battery and contact your STIHL servicing
dealer for assistance.
The saw has a malfunction.
10 Testing the Chain Saw and Battery
10.1 Checking the Chain Sprocket
► Switch off the chain saw, engage the chain brake and
remove the battery.
► Disengage the chain brake.
► Remove the chain sprocket cover.
► Remove the bar and chain.
0458-791-9621-A
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2
3
a
► Use a STIHL gauge to check the wear marks on the
sprocket.
► If wear marks are deeper than a = 0.5 mm: Do not use your
chain saw and contact your STIHL servicing dealer.
The chain sprocket must be replaced.
10.2 Checking the Guide Bar
► Switch off the chain saw, engage the chain brake and
remove the battery.
► Remove the chain and guide bar.
► Measure depth of bar groove with scale on STIHL filing
gauge.
► Install a new guide bar if one of the following points
applies:
– Guide bar is damaged.
– Measured bar depth is less than specified minimum
depth, @ 19.3.
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