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

LOCATING PINS

 

figure 3a and that hole below the slot

is located over the adjustment pin.

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.

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

5

figure 5.

Toadjust 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

6

 

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

 

10

lubricate the chain whenever replacing

 

a fully discharged battery with a fully charged one.

Page 10
Image 10
Black & Decker LPP120 instruction manual Adjusting Chain Tension, Chain Oiling