CHAIN
SPROCKET
Regularly
check
the
condition
of
the sprocket with
your
local retailer and replace
it
when it is worn.
Do
not mount a new chain with a worn sprocket
or
vice-versa.
SHARPENING
THE
CHAIN
(Flg.12)
AwAANINGI
To
ensure that the chain-
saw
worlor safely
and
fllficiently,
it
iJJ
fHllJIJlltial
that
the
cutting components are
welklharp-
ened.
Sharpening is necessary when:
• The sawdust looks like dust.
• Cutting becomes more difficult.
•
The cut is not straight.
• Vibrations increase.
• Fuel consumption increases.
AwARNINGI
II
the chain Is
not
suffi-
ciently
sharpened,
the
kick-beck's
risk
In-
creases.
A specialized centre will sharpen the chain using
the right
tools
to
ensure minimum removal
of
ma-
terial
and even sharpness on all the cutting edges.
If
you
sharpen the
chain
yourself,
use
special
round-section files with
the
right
diameter
de-
pending on the type
o1
chain (see "Chain Mainte-
nance Table"). You need a certain amount
of
skill
and
experience
to
avoid
damaging
the
cutting
edges.
Sharpen the chain
as
follows:
- Disassemble the pruner from the brush cutter
and secure the bar with the chain in a vice, so
that the chain can run
smoothly.
- Tighten the chain if it is loose.
- Mount the file in the guide and then insert it in the
tooth
at
a constant angle from the cutting edge.
- Sharpen in a forward motion a few times and
re-
peat this on all the cutting edges facing the same
way (right
or
left).
MAINTENANCE
AND
STORAGE
-
Tum
the bar over in the vice and repeat on all the
other cutting edges.
- Check that the
limiter tooth does not stick out fur-
ther
than
the
inspection instrument and file any
projecting parts with a
flat file, rounding
off
the
edge.
- After sharpening, remove
all traces
o1
filing and
dust and
lubricate the chain in an oil bath.
Replace the chain whenever:
-
The
length
of
the cutting edges reduces
to
5
mm
or
less;
- There is too much play between the links and the
rivets.
BAA
MAINTENANCE
(Fig.
13)
To
avoid asymmetrical
wear
on
the bar, make sure
it is turned over
periodically.
To
keep the
bar
in perfect working order, proceed
as follows:
- grease the bearings on
the
nose sprocket (if
present) with the syringe;
-
Clean the
bar
groove with the scraper (not in-
cluded);
- clean the lubrication holes;
- with a flat file, remove burr from the
edges
and
level off the guides.
Replace the
bar
whenever:
- the groove is not
as
deep
as
the height
of
the
drive
links (which must never touch the bottom);
- the inside of the guide is worn enough
to
make
the chain lean
to
one
side.
BAA
AND
CHAIN COMBINATIONS
Accessories with the following
code
must
be
used
on this machine:
11880175810 = bar (Length 25
cm/
1
o·
Groove width 1,27
mm/
1/20j
118801759/0 = chain (Pilch
318"
mini).
Given
product
evolution, the
above
mentioned
tools may
be
replaced in time with others having
similar interchangeable and operating safety char-
acteristics.
Chain
pitch
Limiter
tooth
level (a} File
diameter
(d)
d~
~
lnchee: 3/8 Mini
mm:
9,32
0
55
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