Maintenance - Makita BTW150 Betriebsanleitung

4. Charge the Nickel Metal Hydride battery cartridge when
you do not use it for more than six months.
Selecting correct socket
Always use the correct size socket for bolts and nuts. An
incorrect size socket will result in inaccurate and inconsistent
fastening torque and/or damage to the bolt or nut.
Installing or removing socket (Fig. 3 & 4)
CAUTION:
Always be sure that the tool is switched off and the battery
cartridge is removed before installing or removing the socket.
1. For socket without O-ring and pin
To install the socket, push it onto the anvil of the tool until
it locks into place.
To remove the socket, simply pull it off.
2. For socket with O-ring and pin
Move the O-ring out of the groove in the socket and
remove the pin from the socket. Fit the socket onto the
anvil of the tool so that the hole in the socket is aligned
with the hole in the anvil. Insert the pin through the hole in
the socket and anvil. Then return the O-ring to the original
position in the socket groove to retain the pin. To remove
the socket, follow the installation procedures in reverse.
Switch action (Fig. 5)
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.
Reversing switch action (Fig. 6)
CAUTION:
• Always check the direction of rotation before operation.
• 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 reversing switch
lever to the neutral position.
This tool has a reversing switch to change the direction of
rotation. Depress the reversing switch lever from the A side for
clockwise rotation or from the B side for counterclockwise
rotation. When the reversing switch lever is in the neutral
position, the switch trigger cannot be pulled.
Operation
CAUTION:
Always insert the battery cartridge all the way until it locks in
place. 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 arround you.
The proper fastening torque may differ depending upon the
kind or size of the 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 socket over
the bolt or nut. Turn the tool on and fasten for the proper
fastening time.
6
NOTE:
• When fastening screw M8 or smaller, carefully adjust pres-
sure on the switch trigger so that the screw is not damaged.
• Hold the tool pointed straight at the bolt.
• If you fasten the bolt for a time longer than shown in the
figure, the bolt or the socket may be overstressed, dam-
aged, etc. Before starting your job, always perform a test
operation to determine the proper fastening time for your
bolt. Especially for the bolt other than M8, perform the
above test operation to prevent the trouble on socket or bolt,
etc.
The fastening torque is affected by a wide variety of factors
including the following. After fastening, always check the
torque with a torque wrench.
1. When the battery cartridge is discharged almost com-
pletely, voltage will drop and the fastening torque will be
reduced.
2. Socket
• Failure to use the correct size socket will cause a
reduction in the fastening torque.
• A worn socket (wear on the hex end or square end) will
cause a reduction in the fastening torque.
3. Bolt
• Even though the torque coefficient and the class of bolt
are the same, the proper fastening torque will differ
according to the diameter of the bolt.
• Even though the diameters of bolts are the same, the
proper fastening torque will differ according to the
torque coefficient, the class of bolt and the bolt length.
4. The manner of holding the tool or the material of driving
position to be fastened will affect the torque.
5. Operating the tool at low speed will cause a reduction in
the fastening torque.

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and the battery
cartridge is removed before carrying out any work on the tool.
Replacement of carbon brushes (Fig. 9 & 10)
Replace carbon brushes when they are worn down to the limit
mark. Both identical carbon brushes should be replaced at the
same time.
To maintain product safety and reliability, repairs, mainte-
nance or adjustment should be carried out by a Makita
Authorized Service Center.