Makita 6990D Instruction Manual page 6

Tips for maintaining maximum battery life
1. Charge the battery cartridge before completely discharged.
Always stop tool operation and charge the battery 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 temperature at 10°C – 40°C (50°F – 104°F).
Let a hot battery cartridge cool down before charging it.
4. Charge the Nickel Metal Hydride battery cartridge when you do not use it for more than six months.
Installing or removing bit
Important:
Always be sure that the tool is switched off and the
battery cartridge is removed before installing or
removing the bit.
Use only the driver bit or socket bit shown in the figure
below.
Do not use any other driver bit or socket bit.
To install the bit, pull the sleeve in the direction of the
arrow and insert the bit into the sleeve as far as it will
go. Then release the sleeve to secure the bit. (Fig. 3)
To remove the bit, pull the sleeve in the direction of
the arrow and pull the bit out firmly.
NOTE:
If the bit is not inserted deep enough into the sleeve,
the sleeve will not return to its original position and the
bit will not be secured. In this case, try re-inserting the
bit according to the instructions above.
Switch action (Fig. 4)
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 start the tool, simply pull the trigger. Tool speed is
increased by increasing pressure on the trigger.
Release the trigger to stop.
6
Reversing switch action (Fig. 5)
CAUTION:
• Always check the direction of rotation before opera-
tion.
• Use the reversing switch only after the tool comes to
a complete stop. Changing the direction of rotation
before the tool stops may damage the tool.
• When not operating the tool, always set the revers-
ing switch lever to the neutral position.
This tool has a reversing switch to change the direc-
tion of rotation. Depress the reversing switch lever
from the A side for clockwise rotation or from the B
side for counterclockwise rotation. When the switch
lever is in the neutral position, the switch trigger
cannot be pulled.
Installing set plate (Optional accessory)
(Fig. 6)
Always install the set plate when using battery car-
tridges 9100, 9102 or 9102A. Install the set plate on
the tool with the screw provided.
Operation (Fig. 7 & 8)
The proper fastening torque may differ depending
upon the kind or size of the screw/bolt, the material of
the workpiece to be fastened, etc. The relation
between fastening torque and fastening time is shown
in Fig. 7 for standard bolt or Fig. 8 for high tensile
bolt.
Hold the tool firmly and place the point of the driver bit
in the screw head. Apply forward pressure to the tool
to the extent that the bit will not slip off the screw and
turn the tool on to start operation.
NOTE:
• When fastening screw M8 or smaller, carefully
adjust pressure on the switch trigger so that the
screw is not damaged.
• Hold the tool pointed straight at the screw.
• If you tighten the screw for a time longer than shown
in the figures, the screw or the point of the driver bit
may be overstressed, stripped, damaged, etc.
Before starting your job, always perform a test
operation to determine the proper fastening time for
your screw.