Makita BUC250 Manuel D'instructions page 18

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.
1. To remove the saw chain, slightly slide the lever in
the direction of arrow so that it can be released from
the locked position and move the lever in the upright
position as shown in the figure. (Fig. 6)
2. Press the lever and with the lever pressed in, turn it
counterclockwise to loosen the nut until sprocket
cover comes off. (Pressing in the lever leads to the
fitting of lever into the nut.) (Fig. 7)
3. Turn the adjusting dial counterclockwise to release
the saw chain tension.
4. Remove the sprocket cover.
5. Remove the saw chain and guide bar from the chain
saw.
6. To install the saw chain, fit in one end of the saw
chain on the top of the guide bar and the other end
of it around the sprocket. (Fig. 8)
At this time, fit the saw chain as shown in the figure
because it rotates in the direction of arrow.
7. Rest the guide bar in place on the chain saw.
8. Turn the adjusting dial counterclockwise to slide the
adjusting pin in the direction of arrow. (Fig. 9)
9. Place the sprocket cover on the chain saw so that
the adjusting pin is positioned in a small hole in the
guide bar. (Fig. 10)
10. Press in the lever and with the lever depressed turn
it fully clockwise to tighten the nut. Then make it
about a quarter turn counterclockwise to loosen the
nut lightly. (Fig. 11)
Adjusting saw chain tension
The saw chain may become loose after many hours of
use. From time to time check the saw chain tension
before use. (Fig. 12)
Move the lever in the upright position.
Press in the lever. With the lever depressed, make a
quarter turn on it counterclockwise to loosen the nut
lightly. (Pressing in the lever leads to the fitting of lever
into the nut.) (Fig. 13)
Turn the adjusting dial to adjust saw chain tension. Grasp
the saw chain in the middle of the guide bar and lift up.
The gap between the guide bar and the tie strap of the
saw chain should be approx. 2 – 4 mm. If the gap is not
approx. 2 – 4 mm, slightly turn the adjusting dial which
secures the guide bar. At this time, adjust with the tip of
guide bar slightly pointing up. (Fig. 14)
With the lever depressed, turn it fully clockwise to tighten
the nut firmly. (Fig. 15)
Return the lever to its original position. (Fig. 16)
CAUTION:
• Excessively high tension of saw chain may cause
breakage of saw chain, wear of the guide bar and
breakage of the adjusting dial.
18
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• Installing or removing saw chain should be carried out
Battery adapter (Accessory) (Fig. 17 & 18)
• Before using battery adapter, read all instructions on
• When charging a battery cartridge, first remove it from
Installing or removing battery adapter
• Always switch off the tool before insertion or removal of
• To remove the battery adapter, withdraw it from the tool
• To insert the battery adapter, align the tongue on the
• Do not use force when inserting the battery adapter. If
• The way of removing or installing a battery cartridge
• Press down the hook securely as far as it will go when
Arm cord hook (Accessory) (Fig. 19)
• Do not attach the holder of arm cord hook to other than
Using the arm cord hook helps to minimize a risk of cut-
ting off the extension cord unexpectedly caused by the
loose extension cord.
Attach firmly the arm cord hook band placing around
your arm and pass the extension cord through the holder.
The length of the arm cord hook band is adjustable.
NOTE:
• Do not pass the extension cord through the band.
• Do not force the opening of the holder. Failure to do so
OPERATION
Lubrication (Fig. 20)
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 85 ml.
After refilling the tank, always screw the provided oil tank
cap on the chain saw.
in a clean place free from sawdust and the like.
CAUTION:
tools using battery.
the battery adapter and then charge it. It is not allowed
to charge the battery cartridge while using battery
adapter.
the battery adapter.
while sliding the button on the adapter.
battery adapter 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.
the adapter does not slide in easily, it is not being
inserted correctly.
from or on the battery adapter is the same as that of
removing or installing it from or on the tools.
the battery adapter is hooked on the waist belt and sim-
ilar objects.
CAUTION:
the extension cord. Failure to do so may cause an acci-
dent or personal injury.
may cause deflection and damage to it.