Functional Description - Makita BUC250 Betriebsanleitung

6. Do not store the tool and battery cartridge in
locations where the temperature may reach or
exceed 50°C (122°F).
7. Do not incinerate the battery cartridge even if it
is severely damaged or is completely worn out.
The battery cartridge can explode in a fire.
8. Be careful not to drop or strike battery.
9. Do not use dropped or struck battery.
SAVE THESE INSTRUCTIONS.
Tips for maintaining maximum battery life
1. Charge the battery cartridge before completely
discharged.
Always stop tool operation and charge the bat-
tery cartridge when you notice less tool power.
2. Never recharge a fully charged battery cartridge.
Overcharging shortens the battery service life.
3. Charge the battery cartridge with room tempera-
ture at 10°C – 40°C (50°F – 104°F). Let a hot bat-
tery cartridge cool down before charging it.

FUNCTIONAL DESCRIPTION

CAUTION:
• Always be sure that the tool is switched off and the bat-
tery cartridge is removed before adjusting or checking
function on the tool.
Installing or removing battery cartridge (Fig. 1)
CAUTION:
• Hold the tool and the battery cartridge firmly when
installing or removing battery cartridge. Failure to
hold the tool and the battery cartridge firmly may cause
them to slip off your hands and result in damage to the
tool and battery cartridge and a personal injury.
• 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.
Battery protection system
The battery cartridge is equipped with the protection sys-
tem, which automatically cuts off the output power for its
long service life.
The tool may stop during operation when the tool and/or
battery are placed under the following situation. This is
caused by the activation of protection system and does
not show the tool trouble.
• When the tool is overloaded:
At this time, release the switch trigger and remove
causes of overload and then pull the switch trigger
again to restart. When the tool does not work even
after pulling the switch trigger, the battery power
auto-stop is still at work. Charge the battery car-
tridge before use.
• When the remaining battery capacity becomes low:
Recharge the battery cartridge.
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.
Checking the chain brake (Fig. 3)
NOTE:
• If the chain saw fails to start, the chain brake must be
released. Pull the front hand guard backwards firmly
until you feel it engage.
Hold the chain saw with both hands when switching it on.
Hold the top handle with your right hand, the front handle
with your left. The bar and the chain must not be in con-
tact with any object.
First press the lock-off button, then the switch trigger.
The saw chain starts immediately.
Press the front hand guard forwards using the back of
your hand. The saw chain must come to an immediate
standstill.
CAUTION:
• Should the saw chain not stop immediately when this
test is performed, the saw may not be used under any
circumstances. Consult a MAKITA specialist repair shop.
Checking the run-down brake
Switch on the chain saw.
Release the switch trigger completely. The saw chain
must come to a standstill within one second.
CAUTION:
• Should the saw chain not come to a stop within one
second when this test is performed, the saw must not
be used. Consult a MAKITA specialist repair shop.
Adjusting the chain lubrication (Fig. 4)
You can adjust the oil pump feed rate with the adjusting
screw. The amount of oil can be adjusted using the uni-
versal wrench.
Carabiner (rope attachment point) (Fig. 5)
Carabiner (Rope attachment point) is for use of tool
hanging. Before using carabiner, pull it out and tie it with
a rope.
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)
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