MAINTENANCE, REPAIR AND STORING
Use
only STIHL replacement parts for maintenance and
repair. Use of
parts
manufactured by others
may cause se-
rious
or
fatal
injury.
Never
operate a chain saw that is damaged, improperly
adjusted or not completely or
securely
assembled. Follow
the
maintenance and repair instructions in the appropriate
section of your owner's manual,
especially those in the
chapters "Guide Bar, Chain
and Sprocket", "Sharpening
and
Maintenance of Saw Chain" and "Chain Brake".
Warning! Always stop the
engine and ensure that the
chain is stopped before
making any adjustments,
mainte-
nance or
repair work, changing the
saw
chain
or
cleaning
the saw. Do not
attempt any maintenance or repair work
not described
in your owner's manual. Have such work
performed
at your
STIHL
service
shop only.
Check fuel filler
cap
for leaks
at regular intervals. Use the
specified spark plug and make sure it and the ignition
lead
are always in good condition.
Keep spark plug and wire connection
tight and clean. The
spark plug electrode
gap
should be checked with
a
feeler
gauge
at least
every
50 operating hours and reset if neces-
sary. Fit a new spark plug if the electrodes are badly pitted.
Warning!
STIHL provides
a
spark
arresting muffler
on
each chain
saw
designed
to
reduce the risk
of fire and
hearing loss. Never operate a saw when the spark-
arresting screen is missing from the muffler, or when the
muffler is worn, damaged, missing or modified. Re-
member that the risk of forest fires is greater in
hot
weather. Never touch
a
hot muffler
or
burn will result.
Keep the chain, bar and sprocket clean; replace worn
sprockets or chains.
Keep the chain sharp.
You
can spot a
dull chain when
easy-to-cut wood
becomes hard to cut and burn marks
appear on the wood.
Keep the chain
at
proper
tension.
Tighten sll nuts, bolts
and
screws except
the carburetor adjustment
screws
after
each use.
Warning! In order for the chain brake
on your
STIHL chain
saw to properly perform
its function of reducing the risk of
kickback and other injuries, it must be
properly main-
tained. Like an automobile brake, a
chain
saw chain brake
incurs wear
each time it is engaged.
The amount of wear will vary depending
upon usage, con-
ditions
under
which
the saw is used and other
factors.
Excessive
wear
will reduce the effectiveness of the chain
brake and can render it inoperable. For the
proper and
effective
operation of the chain brake the
brake band and
clutch
drum must be kept free of dirt, grease and other
for-
eign matter which may reduce friction of
the band on the
drum.
For these reasons,
each STIHL chain
saw
should be
returned to trained personnel such as your
Stihl servicing
dealer for periodic
inspection and servicing of the brake
system
according
to
the following schedule:
Heavy usage every three months,
Moderate usage
twice a year,
Occasional
usage
annually.
The brake band should be replaced whenever
wear
has re-
duced any portion of its original
thickness by 25% or
more. Additionally, the daily
maintenance schedule for
your chain saw set forth in your
STIHL
owner's manual
should be strictly followed.
Store chain saw in a dry place and away from children. Be-
fore storing for
longer than a few days always empty the
fuel tank.
23
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