Checking The Saw Chain; Testing The Chain Brake; Checking The Controls - Stihl MSA 120 C Gebrauchsanleitung

11 Testing the Chain Saw and Battery
– Guide bar is damaged.
– Measured bar depth is less than specified minimum
depth, @ 20.3.
– Bar groove is pinched or splayed.
► If you have any queries: Contact your STIHL servicing
dealer.

11.3 Checking the Saw Chain

► Switch off the chainsaw, engage the chain brake and
remove the battery.
2
► Use a STIHL filing gauge (2) to check the height of the
depth gauges (1). The STIHL filing gauge must match the
chain pitch.
► If a depth gauge (1) projects from the filing gauge (2):
Lower the depth gauge (1), @ 17.2.
2
4
► Make sure the service marks (1 to 4) on the cutters are
visible.
0458-716-9621-C
1
1
3
► If one of the service marks is not visible on a cutter: Do not
use your chainsaw and contact your STIHL servicing
dealer.
► Use a STIHL filing gauge to check that a filing angle of 30°
has been maintained on all cutters. The STIHL filing
gauge must match the chain pitch.
► If a filing angle of 30° has not been maintained:
Resharpen the saw chain.
► If you have any queries: Contact your STIHL servicing
dealer for assistance.

11.4 Testing the Chain Brake

► Engage the chain brake and remove the battery.
WARNING
The chain's cutters are very sharp. There is a risk of cut
injuries.
► 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.
► Attempt to pull the trigger lever without depressing the
lockout button.
► 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.
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