39
NOTE:
It is not necessary to remove the saw chain (3) to
lubricate the sprocket nose (top of the guide bar). Lubrication
can be done on the job.
Using a disposable lube gun, insert the nose of the needle
into the lubrication hole (Fig. 31 A) and inject grease until it
appears on the outside edge of the sprocket (Fig. 31).
Make sure that the chain brake (2) is deactivated. Rotate the
saw chain (3) by hand. Repeat the lubrication procedure until
the sprocket has been greased.
Guide Bar and Saw Chain Maintenance
Most guide bar problems can be prevented merely by
keeping the product well maintained. Incorrect filling and
non-standard cutter and depth gauge settings are the causes
of most guide bar problems, primarily resulting in uneven bar
wear. As the bar wears unevenly, the rails widen, which may
cause the chain to clatter and make it difficult to complete
straight cuts. If the guide bar is insufficiently lubricated and
the product is operated with a saw chain which is too tight,
this will contribute to rapid bar wear. To help minimise bar
wear, maintenance of the guide bar as well as the saw chain
is recommended.
Fig. 31
