23 ENGLISH
•
Chain
blade
90PX
:
55°
•
Chain
blade
91PX
:
55°
•
Chain
blade
25AP
:
55°
File and file guiding
—
Use
a
special
round
file
(optional
accessory)
for
saw chains to sharpen
the chain. Normal round files
are
not
suitable.
—
Diameter of
the
round
file
for
each
saw
chain
is
as
follows:
•
Chainblade
90PX
:
4.5
mm
•
Chainblade
91PX
:
4.0
mm
•
Chainblade
25AP
:
4.0
mm
—
The
file
should
only
engage
the
cutter
on
the
forward
stroke.
Lift
the
file
off
the
cutter
on
the
return
stroke.
—
Sharpen
the
shortest
cutter
first.
Then
the
length
of this shortest cutter
becomes the standard for all other cutters on
the saw chain.
—
Guide
the
file
as
shown
in
the
figure.
►
Fig.27:
1.
File
2.
Saw chain
— The file
can
be
guided
more
easily
if
a
file
holder
(optional
accessory) is
employed. The
file
holder
has
markings
for the correct sharpening angle of 30° (align the
markings parallel to the saw chain) and limits the
depth of
penetration (to
4/5
of
the
file
diameter).
►
Fig.28:
1.
File holder
— After sharpening the chain, check the height of the
depth gauge using the chain gauge tool (optional
accessory).
►
Fig.29
—
Remove
any
projecting material,
however
small,
with
a
special
flat
file
(optional
accessory).
— Round off the front of the depth gauge again.
Cleaning the guide bar
Chips and sawdust will build up in the guide bar groove.
They
may
clog
the
bar
groove
and
impair
the
oil
flow.
Clean out the chips and sawdust every time
when you sharpen or replace the saw chain. ►
Fig.30
Cleaning the sprocket cover
Chips and saw dust will accumulate inside of the
sprocket cover. Remove the sprocket cover and saw
chain from the tool then clean the chips and saw dust.
►
Fig.31
Cleaning the oil discharge hole
Small dust or particles may be built up in the oil
discharge hole during operation. These dust or particles
may impair the oil
to
flow
and
cause
an
insufficient lubrication on
the
whole
saw chain. When a poor chain oil
delivery occurs at the top of guide bar, clean the oil
discharge hole as follows.
1.
Remove the sprocket cover and saw chain from
the tool.
2.
Remove the small dust or particles using a slotted
screwdriver or the like.
►
Fig.32:
1.
Slotted screwdriver
2.
Oil
discharge hole
3.
Insert the battery cartridge into the tool. Pull the
switch
trigger
to
flow
built-up
dust
or
particles
off
the
oil
discharge
hole by discharging chain oil.
4.
Remove the battery cartridge from the tool.
Reinstall the sprocket cover and saw chain on the tool.
CAUTION:
A worn sprocket will damage a new
saw chain. Have the sprocket replaced in this case.
Before
fitting
a
new
saw
chain,
check
the
condition
of
the sprocket.
►
Fig.33:
1.
Sprocket
2.
Areas to be worn
out
Always
fit
a
new
locking
ring
when
replacing the
sprocket.
►
Fig.34:
1.
Locking ring
2.
Sprocket
NOTICE:
Make sure that the sprocket is installed
as shown in the figure.
Replacing the sprocket
Storing the tool
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