Inspecting And Maintaining The Chain Sprocket; Inspecting And Maintaining The Guide Bar - Stihl MSE 141 C Instruction Manual

20 Inspection and Maintenance
► Periodically sharpening the chain, maintaining the depth
limiting guides at the appropriate height and replacing the
saw chain when indicated by the relevant wear marks or
when the chain is damaged or shows signs of excessive
wear.
► Having missing or damaged safety labels replaced by an
authorized STIHL servicing dealer.
If you make a warranty claim for a component that has not
been serviced or maintained properly, coverage may be
denied.

20.3 Inspecting and Maintaining the Chain Sprocket

► Switch off the chain saw, engage the chain brake and
disconnect the chain saw from the power supply.
► Disengage the chain brake, @ 12.2.
► Remove the chain sprocket cover, saw chain and guide
bar.
a
► Check the chain sprocket cover for wear marks.
► If the wear marks are deeper than a = 0.020 in. (0.5 mm),
have the chain sprocket replaced.
STIHL recommends using genuine STIHL chain sprockets to
ensure optimal functioning of the chain brake.
Alternating between two saw chains helps reduce wear and
preserve the chain sprocket.

20.4 Inspecting and Maintaining the Guide Bar

► Switch off the chain saw, engage the chain brake and
disconnect the chain saw from the power supply.
0458-729-8621-A
► Remove the guide bar and saw chain, @ 11.2.2.
► Measure the depth of the guide bar groove in the area with
the greatest wear using the measuring tool on the file
gauge (special accessory, not included).
► Replace the guide bar if the measured depth is less than
the required minimum depths stated in @ 22.4.
► Check the spread of the guide bar groove with the
measuring tool on the file gauge.
► Replace the guide bar if the groove is narrowed, spread or
shows other signs of substantial wear or damage.
To maintain the guide bar:
► Flip the guide bar after each sharpening and each time the
chain is changed to avoid uneven wear. There is no "top"
or "bottom" of the bar. It may be used in either orientation,
even though the printing on the bar may be upside down.
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