14
CHECK CHAIN TENSION
WARNING:
Wear
protective
gloves when handling chain. The chain
is sharp and can cut you even when it is
not moving.
Chain tension is very important. Chain
stretches during use. This is especially
true during the first few times you use your
saw. Always check chain tension each
time you use your saw.
D
Unplug unit from the power source.
D
Use a screwdriver to move chain
around guide bar to ensure kinks do not
exist. The chain should rotate freely.
D
Loosen bar clamp nuts until they are fin-
ger tight against the bar clamp.
D
Turn the adjusting screw clockwise until
the chain solidly contacts bottom of
guide bar rail.
Then, turn adjusting
screw an additional 1/4 turn.
Adjusting Screw -- 1/4 Turn
NOTE: To tighten the chain, turn the ad-
justing screw clockwise; to loosen the
chain, turn the adjusting screw counter-
clockwise.
Adjusting Screw
D
Check the tension by lifting the chain
from the guide bar. Remove some of the
stiffness in the chain by pulling down
and letting go of the chain several times.
D
Continue turning the adjusting screw
until the tension is correct.
D
Tighten bar clamp nuts with a wrench.
D
Recheck chain tension.
WARNING:
If the saw is operated
with a loose chain, the chain could jump
off the guide bar and result in serious in-
jury.
CHECK CHAIN SHARPNESS
A sharp chain makes wood chips. A dull
chain makes a sawdust powder and
cuts slowly. See
CHAIN SHARPENING
in
the
SERVICE
AND
ADJUSTMENTS
section.
CHECK GUIDE BAR
Conditions which require guide bar main-
tenance:
S
Saw cuts to one side or at an angle.
S
Saw has to be forced through the cut.
S
Inadequate supply of oil to the bar and
chain.
Check the condition of the guide bar each
time the chain is sharpened. A worn guide
bar will damage the chain and make cut-
ting difficult.
After each use, with unit disconnected
from power source, clean all sawdust from
the guide bar and sprocket hole.
To maintain guide bar:
S
Disconnect the chain saw from the pow-
er source.
S
Loosen and remove bar clamp nuts.
Remove bar and chain from saw.
S
Clean the oil holes and bar groove after
each 5 hours of operation.
Remove Sawdust From
Guide Bar Groove
Sprocket Hole
Oil Holes
S
Add lubricant to sprocket hole after each
use.
S
Burring of guide bar rails is a normal
process of rail wear. Remove these
burrs with a flat file.
S
When rail top is uneven, use a flat file to
restore square edges and sides.
Correct Groove
Worn Groove
File Rail Edges
and Sides
Square
Replace the guide bar when the groove is
worn, the guide bar is bent or crack--ed, 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 decal located
on the chain saw.
