Makita DHR241 Instruction Manual page 7

Switch action
► Fig.3: 1. Switch trigger
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 switch trigger. Tool
speed is increased by increasing pressure on the switch
trigger. Release the switch trigger to stop.
Reversing switch action
► Fig.4: 1. Reversing switch lever
This tool has a reversing switch to change the direction of rota-
tion. Depress the reversing switch lever from the A side for clock-
wise rotation or from the B side for counterclockwise rotation.
When the reversing switch lever is in the neutral posi-
tion, the switch trigger cannot be pulled.
CAUTION:
• Always check the direction of rotation before
operation.
• Use the reversing switch only after the tool
comes to a complete stop. Changing the direc-
tion of rotation before the tool stops may dam-
age the tool.
• When not operating the tool, always set the
reversing switch lever to the neutral position.
Selecting the action mode
Rotation with hammering
► Fig.5: 1. Lock button 2. Rotation with hammering
3. Action mode changing knob
For drilling in concrete, masonry, etc., depress the lock
button and rotate the action mode changing knob to
the symbol. Use a tungsten-carbide tipped bit.
Rotation only
► Fig.6: 1. Rotation only
For drilling in wood, metal or plastic materials, depress
the lock button and rotate the action mode changing
knob to the symbol. Use a twist drill bit or wood bit.
Hammering only
► Fig.7: 1. Hammering only
For chipping, scaling or demolition operations, depress
the lock button and rotate the action mode changing
knob to the symbol. Use a bull point, cold chisel,
scaling chisel, etc.
CAUTION:
• Do not rotate the action mode changing knob
when the tool is running. The tool will be
damaged.
• To avoid rapid wear on the mode change mech-
anism, be sure that the action mode changing
knob is always positively located in one of the
three action mode positions.
Torque limiter
The torque limiter will actuate when a certain torque
level is reached. The motor will disengage from the out-
put 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 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.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
the battery cartridge is removed before carrying
out any work on the tool.
Side grip (auxiliary handle)
► Fig.8: 1. Grip base 2. Side grip 3. Loosen 4. Tighten
5. Teeth 6. Protrusion
CAUTION:
• Always use the side grip to ensure operating
safety.
Install the side grip so that the teeth on the grip fit in
between the protrusions on the tool barrel. Then tighten
the grip by turning clockwise at the desired position. It
may be swung 360° so as to be secured at any position.
Bit grease
Coat the bit shank head beforehand with a small
amount of bit grease (about 0.5 -1 g). This chuck lubri-
cation assures smooth action and longer service life.
Installing or removing the bit
Clean the bit shank and apply bit grease before install-
ing the bit.
► Fig.9: 1. Bit shank 2. Bit grease
Insert the bit into the tool. Turn the bit and push it in until
it engages.
► Fig.10: 1. Bit 2. Chuck cover
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.
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.
► Fig.11: 1. Bit 2. Chuck cover
7 ENGLISH