Makita HR4003C Instruction Manual page 8

Hammering mode (Switch button
mode)
► Fig.6: 1. Change lever 2. Pointer
For continuous chipping, scaling or demolition opera-
tions, rotate the change lever to the
► Fig.7: 1. Switch button
The switch button projects out and lights in red.
Use a bull point, cold chisel, scaling chisel, etc.
NOTE:
• When using the tool in the
switch trigger does not work but only the switch
button works.
Torque limiter
The torque limiter actuates when torque reaches a cer-
tain level. The motor disengages from the output shaft.
When this happens, the bit stops turning.
CAUTION:
• As soon as the torque limiter actuates, switch
off the tool immediately. This helps to prevent
premature wear of the tool.
Indicator lamp
► Fig.8: 1. Power-ON indicator lamp (green)
2. Service indicator lamp (red)
The green power-ON indicator lamp lights up when the
tool is plugged in. If the indicator lamp does not light up,
the mains cord or the controller may be defective.
When the indicator lamp lights up but the tool does not
start even the tool is switched on, the carbon brushes
may be worn out, or the controller, the motor or the ON/
OFF switch may be defective.
If above symptoms occur, stop using the tool immedi-
ately and ask your local service center.
The red service indicator lamp lights up when the car-
bon brushes are nearly worn out to indicate that the tool
needs servicing. After some period of use, the motor
automatically shuts off.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
unplugged before carrying out any work on the
tool.
Side handle
► Fig.9
CAUTION:
• Use the side handle only when chipping, scaling
or demolishing. Do not use it when drilling in
concrete, masonry, etc. The tool cannot be held
properly with this side handle when drilling.
► Fig.10: 1. Side handle 2. Clamp nut
symbol.
symbol mode, the
8 ENGLISH
The side handle can be swung 360° on the vertical and
secured at any desired position. It also secures at eight
different positions back and forth on the horizontal.
Just loosen the clamp nut to swing the side handle to a
desired position. Then tighten the clamp nut securely.
Side grip
CAUTION:
• Always use the side grip to ensure operating
safety when drilling in concrete, masonry, etc.
► Fig.11: 1. Side grip
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 clockwise.
Installing or removing the bit
► Fig.12: 1. Bit shank 2. Bit grease
Clean the bit shank and apply bit grease before install-
ing the bit.
► Fig.13: 1. Bit 2. Release cover
Insert the bit into the tool. Turn the bit and push it in until
it engages.
If the bit cannot be pushed in, remove the bit. Pull the
release 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.
► Fig.14: 1. Bit 2. Release cover
To remove the bit, pull the release cover down all the
way and pull the bit out.
Bit angle (when chipping, scaling or
demolishing)
► Fig.15: 1. Change lever 2. Pointer
The bit can be secured at 24 different angles. To
change the bit angle, rotate the change lever so that
the pointer points to the
desired angle.
► Fig.16: 1. Change lever 2. Pointer
Rotate the change lever so that the pointer points to
the symbol. Then make sure that the bit is securely
held in place by turning it slightly.
Depth gauge
► Fig.17: 1. Depth gauge 2. Lock button
The depth gauge is convenient for drilling holes of
uniform depth.
Press and hold the lock button, and insert the depth
gauge into the hex hole.
► Fig.18
Make sure the toothed side of the depth gauge faces
the marking.
Adjust the depth gauge by moving it back and forth
while pressing the lock button. After adjustment, release
the lock button to lock the depth gauge.
symbol. Turn the bit to the