Black & Decker LCS120 Instruction Manual page 11

• Remove sprocket cover (8)and allen head screws (9).
• Lift t heworn saw chain (7)outofthegroove i ntheguide bar(6).
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Place new chain in groove of
guide bar making sure saw teeth
are facing correct direction by
matching arrow on chain with
graphic on housing shown in
figure G.
Place the saw chain and guide
bar assembly around the sprocket
(16). Check to make sure that the
slot (17) in the guide bar (6) is
over the two location pins (18) shown in figure E and that the hole
below the slot is located over the adjustment pin (19).
Replace sprocket cover (8) and thread allen head screws (9) in
with wrench until snug, then back wrench off one full turn.
Pull bar nose up and keep it up as you adjust
tension Figure G1.
Rotate the tension adjustment screw (20) in the
front of the housing clockwise to increase the
chain tension as in Figure F.
Follow instructions in "Adjusting Chain
Tension" section.
While still holding the bar nose up, securely
tighten the rear allen screw (9) first, then tighten
the front allen screw.
When the chain is new check the tension
frequently (after disconnecting battery) during the first 2 hours of
use as a new chain stretches slightly.
_dcJUSting Chain Tension
AUTION: Sharp chain. Always wear protective gloves when
handling the chain. The chain is sharp and can cut you when it is
z_t running.
WARNING: Sharp moving chain. To prevent accidental
operation, insure that battery is disconnected from the tool
before performing the following operations. Failure to do this
could result in serious personal injury.
• With the saw still on a firm surface
check the chain tension. The
tension is correct when the chain
snaps back after being pulled 1/8
inch (3mm) away from the guide
bar (6) with light force from the
middle finger and thumb as shown
in figure H. There should be no
"sag" between the guide bar and
the chain on the underside as
shown in figure I. A
• To adjust saw chain tension,
loosen the allen head screws (9).
• Rotate the tension adjustment
screw (20) in the front of the
housing using the flat screwdriver
end of the wrench (11 ) as shown
in figure F.
• Do not over-tension the chain as
this will lead to excessive wear
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and will reduce the life of the bar and chain. Overtensioning also
reduces the amount of cuts you wilt get per battery charge.
Once chain tension is correct, tighten allen head screws (9).
When the chain is new check the tension frequently (after
disconnecting battery) during the first 2 hours of use as a new chain
stretches slightly.
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