Functional Description - Makita HR4003C Instruction Manual

4. In cold weather or when the tool has not been
used for a long time, let the tool warm up for a
while by operating it under no load. This will
loosen up the lubrication. Without proper warm-
up, hammering operation is difficult.
5. Always be sure you have a firm footing. Be sure
no one is below when using the tool in high
locations.
6. Hold the tool firmly with both hands.
7. Keep hands away from moving parts.
8. Do not leave the tool running. Operate the tool
only when hand-held.
9. Do not point the tool at any one in the area when
operating. The bit could fly out and injure
someone seriously.
10. Do not touch the bit, parts close to the bit, or
workpiece immediately after operation; they may
be extremely hot and could burn your skin.
11. Some material contains chemicals which may be
toxic. Take caution to prevent dust inhalation
and skin contact. Follow material supplier safety
data.
12. Do not touch the power plug with wet hands.
SAVE THESE INSTRUCTIONS.
WARNING:
DO NOT let comfort or familiarity with product
(gained from repeated use) replace strict adherence
to safety rules for the subject product. MISUSE or
failure to follow the safety rules stated in this
instruction manual may cause serious personal
injury.

FUNCTIONAL DESCRIPTION

CAUTION:
• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
Switch action
CAUTION:
• Before plugging in the tool, always check to see that
the switch trigger actuates properly and returns to the
"OFF" position when released.
Switch trigger (Fig. 1)
This switch functions when setting the tool in
and symbol modes.
To start the tool, simply pull the switch trigger. Release
the switch trigger to stop.
Switch button (Fig. 2)
This switch functions when setting the tool in
mode.
When the tool is in the
button projects out and lights in red.
To start the tool, press the switch button. The switch light
turns in green.
To stop the tool, press the switch button again.
Speed change (Fig. 3)
The revolutions and blows per minute can be adjusted
just by turning the adjusting dial. The dial is marked 1
(lowest speed) to 5 (full speed).
Refer to the table below for the relationship between the
number settings on the adjusting dial and the revolutions/
blows per minute.
6
symbol
symbol
symbol mode, the switch
For Model HR4003C, HR4013C
Number on Revolutions per
adjusting dial
5
4
3
2
1
014134
For Model HR5202C, HR5212C
Number on Revolutions per
adjusting dial
5
4
3
2
1
014872
For Model HR4013C, HR5212C only
NOTE:
• Blows at no load per minute becomes smaller than
those on load in order to reduce vibration under no
load, but this does not show trouble. Once operation
starts with a bit against concrete, blows per minute
increase and get to the numbers as shown in the table.
When temperature is low and there is less fluidity in
grease, the tool may not have this function even with
the motor rotating.
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)
For continuous chipping,
operations, rotate the change lever to the
(Fig. 6)
The switch button projects out and lights in red.
Blows per
minute minute
500 2,900
470 2,700
380 2,150
290 1,650
250 1,450
Blows per
minute minute
310 2,250
290 2,100
230 1,700
180 1,300
150 1,100
symbol. Use a bull point, cold
scaling or demolition
symbol.