Torque Limiter; Indicator Lamp - Makita HR4003C Instruction Manual

CAUTION:
If the tool is operated continuously at low speeds
•
for a long time, the motor may get overloaded,
resulting in tool malfunction.
The speed adjusting dial can be turned only as far
•
as 5 and back to 1. Do not force it past 5 or 1, or
the speed adjusting function may no longer work.
Selecting the action mode
CAUTION:
Do not rotate the change lever when the tool is
•
running. The tool will be damaged.
To avoid rapid wear on the mode change mechanism,
•
be sure that the change lever is always positively
located in one of the action mode positions.
Hammer drilling mode
Fig.4
For drilling in concrete, masonry, etc., rotate the change
lever to the symbol. Use a tungsten-carbide tipped bit.
Hammering mode (Switch trigger mode)
Fig.5
For chipping, scaling or demolition operations, rotate the
change lever to the
chisel, scaling chisel, etc.
Hammering mode (Switch button mode)
Fig.6
For continuous chipping,
operations, rotate the change lever to the
Fig.7
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
certain 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
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.
symbol. Use a bull point, cold
scaling or demolition
symbol.
symbol mode, the
If above symptoms occur, stop using the tool
immediately and ask your local service center.
The red service indicator lamp lights up when the
carbon 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
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
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
Clean the bit shank and apply bit grease before
installing the bit.
Fig.13
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
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.
Fig.14
To remove the bit, pull the chuck cover down all the way
and pull the bit out.
7