Makita HR2431 Betriebsanleitung Seite 7

OPERATING INSTRUCTIONS
Side grip (auxiliary handle) (Fig. 1)
The side grip swings around to either side, allowing
easy handling of the tool in any position. Loosen the
side grip by turning it counterclockwise, swing it to the
desired position and then tighten it by turning clock-
wise.
Installing or removing drill bit
Important:
Always be sure that the tool is switched off and
unplugged before installing or removing the bit.
Clean the bit shank and apply the bit grease (about
0.5 – 1 g) provided to it before installing the bit.
(Fig. 2)
Insert the bit into the tool. Turn the bit and push it in
until it engages. (Fig. 3)
If the bit cannot be pushed in, remove the bit. Pull the
chuck cover down a couple of times. Then insert the
bit again. Turn the bit and push it in until it engages.
(Fig. 4)
After installing, always make sure that the bit is
securely held in place by trying to pull it out.
To remove the bit, pull the chuck cover down all the
way and pull the bit out.
Switch action (Fig. 5)
CAUTION:
Before plugging in 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. 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.
• Do not pull the switch trigger when the reversing
switch lever is in the neutral position. If you pull the
trigger forcibly, the switch may be damaged.
This tool has a reversing switch to change the direc-
tion of rotation. Move the lever to the
(A position) for clockwise rotation or the
(B position) for counterclockwise rotation.
Selecting action mode (Fig. 6)
This tool employs an action mode changing knob.
Select one of the two modes suitable for your work
needs by using this knob. For rotation only, turn the
knob so that the arrow on the knob points toward the
symbol on the tool body. For rotation with
hammering, turn the knob so that the arrow on the
knob points toward the
CAUTION:
Always set the knob fully to your desired mode
symbol. If you operate the tool with the knob posi-
tioned half-way between the mode symbols, the tool
may be damaged.
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.
• Hole saws, core bits, diamond core bits, etc. cannot
be used with this tool. They tend to pinch or catch
easily in the hole. This will cause the torque limiter
to actuate too frequently.
Dust extractor attachment and dust bag
(in concrete drilling operation)
With the dust extractor attachment and the dust bag
installed on this tool, you can do your work very
cleanly without dust scattered around in the work site.
CAUTION:
These two accessories can be used only for drilling
holes in concrete. Accordingly, do not use them in
metal or wood drilling operation.
Installing dust extractor attachment
Loosen the clamp screw of the side grip by turning it
counterclockwise.
Insert the coupling rod of the dust extractor attach-
ment through the coupling hole of the side grip until
the rod cannot be pushed in any further.
And then tighten the clamp screw clockwise to secure
the dust extractor attachment.
The coupling rod can be inserted from either side A or
B. (Fig. 7)
Note:
At some angles of the side grip with the tool, the dust
position extractor attachment cannnot be installed on the tool
position because of the interference between the attachment
and the tool.
Insert firmly the hose of the dust extractor attachment
into the hose port of the tool until the hose hits against
the bottom of the port to be fixed firmly to the tool.
(Fig. 8)
symbol on the tool body.
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