Craftsman 358.341950 Operator's Manual page 16

_WARNIN_I:Ifthe saw isoperated
with a loose c hain, the chain c ould j ump
off t he guide b ar a nd result inserious
injury tothe operator and/or damage the
chain m aking itunusable. Ifthe chain
jumps off t he guide b ar, inspect each
drive l ink f ordamage. Damaged chain
must berepaired orreplaced.
CHECK CHAIN S HARPNESS
Asharp c hain m akes wood c hips.
Adull c hain m akes asawdust powder
and cuts slowly. See CHAIN SHARP-
ENING.
CHECK GUIDE B AR
Conditions which r equire guide b ar
maintenance:
• Saw cuts t oone side oratanangle.
• Saw has tobe forced through the cut.
• Inadequate supply ofoil t obar/chain.
Check the condition ofguide b ar e ach
time chain i ssharpened. Aworn g uide
bar w ill d amage thechain a nd make
cutting difficult.
After each use, ensure ON/STOP
switch i sintheSTOP position, then
clean a llsawdust from the guide b ar
and sprocket hole.
Tomaintain guide b ar:
• Move O N/STOP switch toSTOR
• Loosen and remove barknob c om-
pletely bylifting l ever and turning
counterclockwise.
• Loosen chain t ension by turning
adjusting wheel (upward direction).
Remove clutch c over.
• Remove bar a nd chain f rom saw.
• Clean t he oilholes a nd bar g roove
after e ach 5 hours o foperation.
Remove Sawdust From
._ j_
Guide Bar tr_ov__,._
Oil Holes o
• Burring of guide bar rails is a normal
process of rail wear. Remove these
burrs with a flat file.
• When rail top is uneven, use a flat file
to restore square edges and sides.
!_('7 -_ File Rail Edges_ N N
I"1
and Sides ] U I
Square I I
Worn Groove Correct Groove
Replace guide bar when the groove is
worn, the guide bar is bent or cracked,
or when excess heating or burring of the
rails occurs. If replacement is necessary,
use only the guide bar specified for your
saw in the repair parts list or on the de-
cal located on the chain saw.
CHECK FUEL MIXTURE LEVEL
• See FUELING ENGINE under the OP-
ERATION section.
LUBRICATION
Bar Oil
Fill Cap
• See GUIDE BAR AND CHAIN OIL un-
der the OPERATION section.
INSPECT AND CLEAN UNIT AND
DECALS
• After each use, inspect complete unit
for loose or damaged parts. Clean the
unit and decals using a damp cloth
with a mild detergent.
• Wipe off unit with a clean dry cloth.
COOLING SYSTEM
To keep the working temperature as
low as possible the machine is
equipped with a cooling system.
The cooling system consists of:
• Air intake on the starter
• Air guide plate
• Fins on the flywheel
• Cooling fins on the cylinder
• Cylinder cover (directs cold air over
the cylinder)
Clean the cooling system with a brush
after each use, more often in demand-
ing conditions. A dirty or blocked cool-
ing system results in the machine
overheating which causes damage to
the piston and cylinder.
CHECK CHAIN BRAKE
See CHAIN BRAKE in the OPERATION
section.
CLEAN AIR FILTER
CAUTION: Do not clean filter in gaso-
line or other flammable solvent to
avoid creating a fire hazard or produc-
ing harmful evaporative emissions.
Cleaning the air filter:
A dirty air filter decreases the life and
performance of the engine and in-
creases fuel consumption and harmful
emissions. Always clean your air filter
after 10 tanks of fuel or 5 hours of op-
eration, whichever comes first. Clean
more frequently in dusty conditions.
16