User manual

29
Sprocket Failures
SPUR SPROCKET WEAR RIM SPROCKET WEAR
As your saw chain wears, naturally, so will your sprocket. When
a new chain is placed on a worn out sprocket your new chain
will wear quicker, matching the wear of the sprockets and
creating a ‘stretch’ effect in your saw chain. The reality is that
this ‘stretch’ is actually the saw chain trying to fit into the wear
on both your sprockets, essentially creating an improper pitch
on the sprocket.
Testing the wear on your sprocket is recommended. Turn off
your chain saw when testing your sprocket. Then pull your saw
chain around the guide bar with the proper tension applied to
the chain. A worn sprocket will make the chain drag and bind
up making it difficult to pull around the guide bar.
Once a sprocket is worn it will need to be replaced in order to
prevent quicker wear on your saw chain and guide bar.
Notch From
Wear
Wear From
Drivelink
Wear on Sprocket will
Create ‘Stretch’ effect
Wear on Sprocket will
Create ‘Stretch’ effect
Notch From
Wear