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MAINTENANCE
CAUTION
:
Always be sure that the tool
is
switched off and unplugged before attempting to perform
inspection or maintenance.
Filling saw chain
To
get
the most in cutting performance from your tool, you must keep the cutter sharp
and filed properly
as
shown below.
TOP PLATE ANGLE SIDE PLATE ANGLE TOP FILING ANGLE
Cutter Raker
,
/
A
top
plate angle
of
If
you
have filed the
top
30'
is ideal.
85".
and side plate correctly
the
top
filling angle will
be
60"
-automatically.
File the side plate
to
Fig.
2r
To
file the saw chain, push the file in the
direction of the arrow. When pulling
it
back, be careful
not to touch the cutters
with the file.
Saw
chain
Fig.
2!
After
a
saw chain has been filed two or three times, the "raker"
(see
Fig.
24)
may need
to be filed down slightly. This is because the raker acts
as
a
depth gauge for the cutters.
As
the cutters are filed, they lose some height due to their angled shape. Eventually, the
cutters will become lower than the depth gauge and consequently, will not be able to
cut. To remedy this, use
a
flat file to file the tops of the rakers
so
that they are about
0.5
mm
(0.025")
below the tips of the cutters
(see
Fig.
24).
Be careful not to file the
rakers excessively or the cutters will be allowed to take too large of
a
"bite", causing
the tool to stall or snag in the cut.
17