7
Bit angle
(when chipping, scaling or demolishing)
Important:
Always be sure that the tool is switched off and the bat-
tery cartridge is removed before changing the bit angle.
To change the bit angle, depress the lock button and
rotate the change lever so that the pointer points to the
O symbol. Turn the bit to the desired angle. (Fig. 13)
Depress the lock button and rotate the change lever so
that the pointer points to the X symbol. (Fig.14)
Then make sure that the bit is securely held in place by
turning it slightly.
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 around you.
• When operating overhead, always make sure the bat-
tery cartridge is locked securely so that it will not be
fallen out of the tool. If not, it may accidentally fall out of
the tool, causing injury to you or someone around you.
Hammer drilling operation (Fig. 15)
Set the change lever to the H symbol. Position the bit at
the location for the hole, then pull the trigger. Do not force
the tool. Light pressure gives best results. Keep the tool
in position and prevent it from slipping away from the
hole.
Do not apply more pressure when the hole becomes
clogged with chips or particles. Instead, run the tool at an
idle, then remove from the hole. By repeating this several
times, the hole will be cleaned out.
CAUTION:
• When the bit begins to break through concrete or if the
bit strikes reinforcing rods embedded in concrete, the
tool may react dangerously. Maintain good balance and
safe footing while holding the tool firmly with both
hands to prevent dangerous reaction.
Torque limiter
The torque limiter will actuate when a certain torque level
is reached. The motor will disengage from the output
shaft. When this happens, the bit will stop turning.
CAUTION:
As soon as the torque limiter actuates, switch off the tool
immediately. This will help prevent premature wear of the
tool.
Chipping/Scaling/Demolition (Fig.16)
Set the change lever to the X symbol. Hold the tool
firmly with both hands. Turn the tool on and apply slight
pressure on the tool so that the tool will not bounce
around, uncontrolled. Pressing very hard on the tool will
not increase the efficiency.
Drilling operation (Fig.17)
Use the optional drill chuck assembly. When installing it,
refer to “Installing or removing drill bit” described on the
previous page. You can drill up to 13 mm diameter in
metal and up to 27 mm diameter in wood.
Set the change lever so that the pointer points to the
M symbol.
Use a cutting lubricant when drilling metals. The excep-
tion is brass which should be drilled dry.
CAUTION:
• Pressing excessively on the tool will not speed up the
drilling. In fact, this excessive pressure will only serve
to damage the tip of your bit, decrease the tool perfor-
mance and shorten the service life of the tool.
• Never use “rotation with hammering” when the drill
chuck assembly is installed on the tool. The drill chuck
assembly may be damaged.
Blow-out bulb (Fig. 18)
Use the blow-out bulb to clean out the hole.
Dust cup (Fig. 19)
Use the dust cup to prevent dust from falling over the tool
and on yourself when performing overhead drilling opera-
tions. Attach the dust cup to the bit. The size of bits which
the dust cup can be attached to is as follows.
Foot
Remove the foot when you use the battery cartridge
B2417.
This will help to place the tool steady. (Fig. 20)
Install the foot when you use the battery cartridge B2430.
This will help to place the tool steady. (Fig. 21)
MAINTENANCE
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.
Replacement of carbon brushes (Fig. 22 & 23)
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clearn and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
Use a screwdriver to remove the brush holder caps. Take
out the worn carbon brushes, insert the new ones and
secure the brush holder caps.
To maintain product safety and reliability, repairs, mainte-
nance or adjustment should be carried out by a Makita
Authorized Service Center.
Bit diameter (mm)
Dust cup 5 6 – 14.5
Dust cup 9 12 – 16