Operation - Makita HR3000C Betriebsanleitung

Bit angle (when chipping, scaling or demolishing)
The bit can be secured at 12 different angles. To change
the bit angle, depress the lock button and rotate the
change lever so that the pointer points to the "O" sym-
bol. 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 g symbol. Then make sure
that the bit is securely held in place by turning it slightly.
(Fig. 14)
Depth gauge (Fig. 15)
The depth gauge is convenient for drilling holes of uni-
form depth. Loosen the clamp screw and adjust the
depth gauge to the desired depth. After adjusting, tighten
the clamp screw firmly.
NOTE:
• The depth gauge cannot be used at the position where
the depth gauge strikes against the gear housing/motor
housing.
Dust cup (optional accessory) (Fig. 16)
Use the dust cup to prevent dust from falling over the tool
and on yourself when performing overhead drilling
operations. Attach the dust cup to the bit as shown in
Fig. 16. The size of bits which the dust cup can be
attached to is as follows.
Dust cup 5
Dust cup 9

OPERATION

Hammer drilling operation (Fig. 17)
Set the change lever and the shift lever to the H sym-
bol.
Position the bit at the desired location for the hole, then
pull the switch 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 the bit partially from the hole. By
repeating this several times, the hole will be cleaned out
and normal drilling may be resumed.
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.
Blow-out bulb (optional accessory) (Fig. 18)
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Chipping/Scaling/Demolition (Fig. 19)
Set the change lever and the shift lever to the g 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.
8
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Drilling in wood or metal (Fig. 20)
Use the optional drill chuck assembly. When installing it,
refer to "Installing or removing drill bit" described on the
previous page.
Set the change lever and the shift lever to the m symbol.
You can drill up to 13 mm diameter in metal and up to
30 mm diameter in wood.
CAUTION:
• Never use "rotation with hammering" when the drill
Drilling in wood
• When drilling in wood, best results are obtained with
Drilling in metal
• To prevent the bit from slipping when starting a hole,
CAUTION:
• Pressing excessively on the tool will not speed up the
Bit diameter
6 mm – 14.5 mm
12 mm – 16 mm
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and
• Never use gasoline, benzine, thinner, alcohol or the
Replacing carbon brushes
When the resin insulating tip inside the carbon brush is
exposed to contact the commutator, it will automatically
shut off the motor. When this occurs, both carbon
brushes should be replaced. Keep the carbon brushes
clean and free to slip in the holders. Both carbon brushes
should be replaced at the same time. Use only identical
carbon brushes. (Fig. 21)
Use a screwdriver to remove the brush holder cover.
(Fig. 22)
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. (Fig. 23)
Lubrication
This tool requires no hourly or daily lubrication because it
has a grease-packed lubrication system. Lubricate the
tool every time the carbon brushes are replaced.
(Fig. 24)
Run the tool for several minutes to warm it up. Switch off
and unplug the tool.
Loosen the six screws and remove the handle. Note that
the top screws are different from other screws. Discon-
nect the connector by pulling it. (Fig. 25)
Remove the crank cap using a hex wrench. Rest the tool
on the table with the bit end pointing upwards. This will
allow the old grease to collect inside the crank housing.
(Fig. 26)
chuck assembly is installed on the tool. The drill chuck
assembly may be damaged.
wood drills equipped with a guide screw. The guide
screw makes drilling easier by pulling the bit into the
workpiece.
make an indentation with a centerpunch and hammer
at the point to be drilled. Place the point of the bit in the
indentation and start drilling.
Use a cutting lubricant when drilling metals. The excep-
tion is brass which should be drilled dry.
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.
unplugged before attempting to perform inspection or
maintenance.
like. Discoloration, deformation or cracks may result.