12.Do not point the tool at any one in the area when operating. The bit could fly out and injure someone seriously.
13.Do not touch the bit or parts close to the bit immediately after operation; they may be extremely hot and could burn your skin.
14.Some material contains chemicals which may be toxic. Take caution to prevent dust inhalation and skin contact. Follow material supplier safety data.
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 
symbol 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 
symbol mode.
When the tool is in the 
symbol mode, the switch 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.
For Model HR4003C, HR4013C
Number on | Revolutions per | Blows per |
adjusting dial | minute | minute |
|
|
|
5 | 500 | 2,900 |
|
|
|
4 | 470 | 2,700 |
|
|
|
3 | 380 | 2,150 |
|
|
|
2 | 290 | 1,650 |
|
|
|
1 | 250 | 1,450 |
014134
For Model HR5202C, HR5212C
Number on | Revolutions per | Blows per |
adjusting dial | minute | minute |
|
|
|
5 | 310 | 2,250 |
|
|
|
4 | 290 | 2,100 |
|
|
|
3 | 230 | 1,700 |
|
|
|
2 | 180 | 1,300 |
|
|
|
1 | 150 | 1,100 |
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
Hammering mode (Switch trigger mode) (Fig. 5)
For chipping, scaling or demolition operations, rotate the change lever to the 
symbol. Use a bull point, cold chisel, scaling chisel, etc.
Hammering mode (Switch button mode)
For continuous chipping, scaling or demolition operations, rotate the change lever to the 
symbol.
(Fig. 6)
The switch button projects out and lights in red.
Use a bull point, cold chisel, scaling chisel, etc. (Fig. 7)
NOTE:
•When using the tool in the 
symbol mode, 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.
7
