Makita BUC121 Manual De Instrucciones página 15

Installing or removing battery cartridge (Fig. 1)
• Always switch off the tool before installing or removal of
the battery cartridge.
• To remove the battery cartridge, withdraw it from the
tool while sliding the button on the front of the cartridge.
• To insert the battery cartridge, align the tongue on the
battery cartridge with the groove in the housing and slip
it into place. Always insert it all the way until it locks in
place with a little click. If you can see the red part on
the upper side of the button, it is not locked completely.
Insert it fully until the red part cannot be seen. If not, it
may accidentally fall out of the tool, causing injury to
you or someone around you.
• Do not use force when inserting the battery cartridge. If
the cartridge does not slide in easily, it is not being
inserted correctly.
Switch action (Fig. 2)
CAUTION:
• Before inserting the battery cartridge into the tool,
always check to see that the switch trigger actuates
properly and returns to the "OFF" position when
released.
To prevent the switch trigger from being accidentally
pulled, a lock-off button is provided.
To start the tool, depress the lock-off button and pull the
switch trigger. Release the switch trigger to stop.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and the bat-
tery cartridge is removed before carrying out any work
on the tool.
Installing or removing saw chain
CAUTION:
• Always be sure that the tool is switched off and the bat-
tery cartridge is removed before installing or removing
the saw chain.
• Always wear gloves when installing or removing the
saw chain.
• Use only saw chain and guide bar with bar tip designed
for this chain saw (see the Extract from the spare parts
list).
• In order to prevent kickback, do not remove the bar tip
or replace the guide bar with one without a bar tip.
Loosen the screw by turning counterclockwise the knob
until the sprocket cover comes off. (Fig. 3)
Remove the sprocket cover.
Remove saw chain and guide bar from the tool.
Fit in one end of the saw chain on the top of guide bar. At
this time, fit the saw chain as shown in the figure
because it rotates in the direction of arrow. (Fig. 4)
Place the saw chain so that the spring and boss are posi-
tioned inside it and fit in the other end of saw chain
around the sprocket as shown in the figure. (Fig. 5)
While turning the guide bar counterclockwise, install it so
that the end of guide bar contacts the spring. (Fig. 6)
Insert the hook of sprocket cover into the hole in the tool
and then place the sprocket cover on the tool. (Fig. 7)
Turn the knob clockwise to tighten the screw firmly.
(Fig. 8)
Adjusting saw chain tension (Fig. 9 & 10)
Just a slight loosening of the screw allows the saw chain
tension to be adjusted. After adjusting, retighten the
screw firmly.
CAUTION:
• For a while after a new saw chain is installed, it tends to
become loosened. From time to time check the saw
chain tension before use.
• Low tension of saw chain may cause coming out of
place.
• Installing or removing saw chain should be carried out
in a clean place free from sawdust and the like.
OPERATION
Lubrication (Fig. 11)
Saw chain is automatically lubricated when the tool is in
operation.
Check the amount of remaining oil in the oil tank through
the oil inspection window.
To refill the tank, remove the cap from the oil tank open-
ing. The oil tank capacity is 80 ml.
After refilling the tank, always screw the provided oil tank
cap on the chain saw.
CAUTION:
• When filling the chain saw with chain oil for the first
time, or refilling the tank after it has been completely
emptied, add oil up to the bottom edge of the filler neck.
The oil delivery may otherwise be impaired.
• As a saw chain oil, use oil exclusively for Makita chain
saws or oil available in market.
• Never use oil including dust and particles or volatile oil.
• When pruning trees, use botanical oil. Mineral oil may
harm trees.
• Never force the chain saw when pruning trees.
• Before cutting out, make sure that the provided oil tank
cap is screwed in place.
Hold the chain saw away from the tree. Start it and wait
until lubrication on saw chain is adequate.
Bring the tip guide/lower guide into contact with the
branch to be cut before switching on. Cutting without-
bringing the tip guide/lower guide into contact with the
branch may cause the guide bar to wobble, resulting in
injury to operator.
Saw the wood to be cut by just moving it down.
Pruning trees
CAUTION:
• Keep all parts of the body away from the saw chain
when the motor is operating.
• Hold the chain saw firmly with both hands when the
motor is running.
• Do not overreach. Keep proper footing and balance at
all times.
Bring the tip guide/lower guide into contact with the
branch to be cut before switching on. Cutting without
bringing the tip guide/lower guide into contact with the
branch may cause the guide bar to wobble, resulting in
injury to operator. (Fig. 12 & 13)
When cutting thick branches, first make a shallow under-
cut and then make the finish cut from the top. (Fig. 14)
If you try to cut off thick branches from the bottom, the
branch may close in and pinch the saw chain in the cut. If
you try to cut off thick branches from the top without a
shallow undercut, the branch may splinter. (Fig. 15)
15