Testing The Chain Brake; Checking The Controls; Checking Chain Lubrication; Testing The Battery - Stihl MSA 120 C Instruction Manual

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► Use a STIHL filing gauge to check the filing angles on the
cutters, @ 20.4. The STIHL filing gauge must match the
chain pitch.
► If the filing angles are not correct: Sharpen the chain,
@ 20.4.
► If you have any queries: Contact your STIHL servicing
dealer.

11.4 Testing the Chain Brake

► Engage the chain brake and remove the battery.
WARNING
The chain's cutters are very sharp. This can result in
personal injury.
► Wear work gloves made of durable material.
► Try to pull the chain along the guide bar by hand.
If the chain cannot be pulled along the bar by hand, the
chain brake is functioning.
► If the chain can be pulled along the bar by hand: Do not
use your chain saw and contact your STIHL servicing
dealer.
The chain brake is defective.

11.5 Checking the Controls

Lockout button and trigger lever
► Engage the chain brake and remove the battery.
► Try to pull the trigger.
► If the trigger can be pulled: Contact your STIHL servicing
dealer.
The lockout button is faulty.
► Depress the lockout button and hold it in that position.
► Pull the trigger and then let it go.
► If the trigger is stiff or does not spring back to its idle
position: Do not use your chain saw and contact your
STIHL servicing dealer.
The trigger has a malfunction.
24
11 Testing the Chain Saw and Battery
Switching on
► Fit the battery.
► Disengage the chain brake.
► Depress the lockout button and hold it in that position.
► Pull the trigger and hold it there.
The chain rotates.
► Release the trigger.
The chain stops rotating.
► If the chain continues to rotate: Engage the chain brake,
remove the battery and contact your STIHL servicing
dealer.
Your saw has a malfunction.

11.6 Checking Chain Lubrication

► Fit the battery.
► Disengage the chain brake.
► Hold the guide bar over a light surface.
► Switch on the saw.
Chain oil is thrown off the chain and is visible on the light
surface. Chain lubrication is operating properly.
If no chain oil can be seen:
► Fill up with chain oil.
► Check chain lubrication again.
► If chain oil is still not visible on the light surface: Do not
use your chain saw and contact your STIHL servicing
dealer. Chain lubrication is defective.

11.7 Testing the Battery

► Press button on battery.
The LEDs glow or flash.
► If the LEDs do not glow or flash: Do not use the battery
and contact your STIHL servicing dealer.
There is a malfunction in the battery.
0458-716-0121-B