Black & Decker LPP120 Instruction Manual page 10

Caution:
sharp moving blade. always wear protective
gloves when installing or removing the chain. The chain is sharp
and can cut you when it is not running.
• Place the saw on a firm surface.
Rotate the two allen head screws
counterclockwise with the wrench
provided as shown in figure 2.
• Remove sprocket cover, bar clamp,
and allen head screws.
• To remove the chain, rotate the screw
in the front of the housing using the
flat screwdriver end of the wrench as
shown in figure 3. Turning the screw
counterclockwise allows the guide bar
to recede and reduces the tension on
the chain so that it may be removed.
• Lift the worn chain out of the groove in
the guide bar.
• Flip guide bar over.
• To replace the chain, check to make
sure that the slot in the guide bar is
over the two location pins shown in
figure 3a and that hole below the slot
is located over the adjustment pin.
• Place new chain in groove of guide
bar and around sprocket. Make sure
saw teeth are facing correct direction by matching arrow on chain
with graphic on housing shown here.
• Rotate the screw in the front of the housing clockwise to increase
the chain tension as in figure 3.
• Replace sprocket cover, bar clamp, and allen head screws.
• Follow instructions for adjusting the chain tension.
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3
3a
LOCATINg PINS
ADjuSTMENT PIN
adjusting Chain tension
• 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 in. (3mm) away
from the chain bar with light force
from the middle finger and thumb as
shown in figure 4. There should be
no "sag" between the guide bar and
the chain on the underside as shown in
figure 5.
• To adjust saw chain tension, loosen allen
head screws.
• Rotate the screw in the front of the
housing using the flat screwdriver end of
the wrench as shown in figure 3.
• Do not over-tension the chain as this will lead to excessive wear
and will reduce the life of the bar and chain. Overtensioning also
reduces the amount of cuts you will get per battery charge.
• Once chain tension is correct, tighten allen head screws to clamp bar.
• 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.
Chain oiling
• A high quality bar and chain oil or
SAE30 weight motor oil should be
used for chain and bar lubrication.
The use of a vegetable based bar and
chain oil is recommended when pruning
trees. Mineral oil is not recommended
because it may harm trees. Never use
waste oil or very thick oil. These may
damage your chain saw.
• Lubricate the whole chain evenly before
each use as shown in figure 6. Also
lubricate the chain whenever replacing a
fully discharged battery with a fully charged one.
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5
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