Adjusting Saw Chain Tension - Makita DUC303 Manual De Instrucciones

Adjusting saw chain tension

CAUTION:
Carry out the procedure of install-
ing or removing saw chain in a clean place free
from sawdust and the like.
CAUTION:
Do not tighten the saw chain too
much. Excessively high tension of saw chain may
cause breakage of saw chain, wear of the guide bar
and breakage of the adjusting dial.
CAUTION:
A chain which is too loose can
jump off the bar and it may cause an injury
accident.
The saw chain may become loose after many hours of use.
From time to time check the saw chain tension before use.
1. Press and fully open the lever until it clicks. Turn it
counterclockwise a little to loosen sprocket cover lightly.
► Fig.17: 1. Lever 2. Sprocket cover
Lift up the guide bar tip slightly and adjust the
2.
chain tension. Turn the adjusting dial to the "-" direction
to loosen, turn to the "+" direction to tighten. Tighten the
saw chain until the lower side of the saw chain fits in the
guide bar rail as illustrated.
► Fig.18: 1. Adjusting dial 2. Guide bar 3. Saw chain
3. Keep holding the guide bar lightly and tighten the
sprocket cover. Make sure that the saw chain does not
loose at the lower side.
4.
Return the lever to the original position.
► Fig.19: 1. Lever 2. Sprocket cover
Make sure the saw chain fits snugly against the lower
side of the bar.
OPERATION
Lubrication
CAUTION:
Do not operate the chain saw when
the tank is empty. Replenish the oil in due time before
the tank is empty.
CAUTION:
Prevent the oil from coming into
contact with the skin and eyes. Contact with the eyes
causes irritation. In the event of eye contact, flush the
affected eye immediately with clear water, then con-
sult a doctor at once.
CAUTION:
Never use waste oil. Waste oil con-
tains carcinogenic substances. The contaminants
in waste oil cause accelerated wear of the oil pump,
the bar and the chain. Waste oil is harmful to the
environment.
Saw chain is automatically lubricated when the tool is in opera-
tion. Check the amount of remaining oil in the oil tank periodically.
To fill the oil, perform the following steps:
1. Clean the area around the oil tank cap thoroughly
to prevent any dirt from entering the oil tank.
2. Lay the chain saw on its side and remove the oil tank cap.
3. Fill the oil tank with the oil. The proper amount of
oil is 200 ml.
4. Screw the oil tank cap firmly back in place.
5. Wipe away any spilt chain oil carefully.
► Fig.20: 1. Oil tank cap 2. Oil tank (translucent)
After refilling, hold the chain saw away from the
tree. Start it and wait until lubrication on saw chain is
adequate.
► Fig.21
When the chain saw is used for the first
NOTICE:
time, it may take up to two minutes for the saw
chain oil to begin its lubricating effect upon the
saw mechanism. Run the saw without load until
it does so.
When filling the chain oil for the first
NOTICE:
time, or refilling the tank after it has been com-
pletely emptied, add oil up to the bottom edge of
the filler neck. The oil delivery may otherwise be
impaired.
NOTICE:
Use the saw chain oil exclusively for
Makita chain saws or equivalent oil available in
the market.
NOTICE:
Never use oil including dust and parti-
cles or volatile oil.
NOTICE:
When pruning trees, use botanical oil.
Mineral oil may harm trees.
NOTICE:
Before the cutting operation, make sure
that the provided oil tank cap is screwed in place.
WORKING WITH THE CHAIN SAW
The first time user should, as a
CAUTION:
minimum practice, do cutting logs on a saw-horse
or cradle.
CAUTION:
When sawing precut timber, use a
safe support (saw horse or cradle). Do not steady
the workpiece with your foot, and do not allow
anyone else to hold or steady it.
CAUTION:
Secure round pieces against
rotation.
CAUTION:
Keep all parts of the body away
from the saw chain when the motor is operating.
Hold the chain saw firmly with
CAUTION:
both hands when the motor is running.
CAUTION:
Do not overreach. Keep proper
footing and balance at all times.
NOTICE:
Never toss or drop the tool.
NOTICE:
Do not cover the vents of the tool.
Bring the bottom edge of the chain saw body into
contact with the branch to be cut before switching on.
Otherwise it may cause the guide bar to wobble, result-
ing in injury to operator. Saw the wood to be cut by just
moving it down by using the weight of the chain saw.
► Fig.22
If you cannot cut the timber right through with a single stroke:
Apply light pressure to the handle and continue sawing and
draw the chain saw back a little; then apply the spike bumper
a little lower and finish the cut by raising the handle.
► Fig.23
15 ENGLISH