Checking The Saw - Stihl MS 400 C-M Instruction Manual

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10 Checking the Saw

10.1 Checking the Chain Sprocket
► Shut off the engine.
► Disengage the chain brake.
► Remove the chain sprocket cover.
► Remove the bar and chain.
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 chainsaw and contact your
STIHL servicing dealer for assistance.
The chain sprocket must be replaced.
10.2 Checking the Guide Bar
► Shut off the engine and engage the chain
brake.
► 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 groove depth is less than
specified minimum depth,
– Bar groove is pinched or splayed.
► If you have any queries: Contact your STIHL
servicing dealer for assistance.
10.3 Checking the Saw Chain
► Shut off the engine and engage the chain
brake.
16
► Use a STIHL filing gauge (2) to check the
► If a depth gauge (1) projects from the filing
► Make sure the service marks (1 to 4) on the
► If one of the service marks is not visible on a
► Use a STIHL filing gauge to check that a filing
► If a filing angle of 30° has not been main‐
► If you have any queries: Contact your STIHL
10.4
► Shut off the engine and engage the chain
19.3.
■ The chain's cutters are very sharp. There is a
► Try to pull the chain along the guide bar by
2
height of the depth gauges (1). The STIHL fil‐
ing gauge must match the chain pitch.
gauge (2): Lower the depth gauge (1),
2
4
cutters are visible.
cutter: Do not use your chainsaw and contact
your STIHL servicing dealer for assistance.
angle of 30° has been maintained on all cut‐
ters. The STIHL filing gauge must match the
chain pitch.
tained: Resharpen the saw chain.
servicing dealer for assistance.
Testing the Chain Brake
brake.
WARNING
risk of cut injuries.
► Wear work gloves made of durable mate‐
rial.
hand.
If the chain cannot be pulled along the bar by
hand, the chain brake is functioning.
10 Checking the Saw
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16.3.
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0458-788-0121-B