7
Lighting up the front lamp (Fig. 4 & 5)
CAUTION:
• Do not look in the light or see the source of light
directly.
To turn on the lamp status, press the button
for few
seconds. To turn off the lamp status, press the button
for few seconds again.
With the lamp status ON, pull the switch trigger to turn on
the lamp. To turn off, release it. The lamp goes out
approximately 10 seconds after releasing the switch trig-
ger.
With the lamp status OFF, the lamp will not turn on even
if the trigger is pulled.
NOTE:
• To confirm the lamp status, pull the trigger. When the
lamp lights up by pulling the switch trigger, the lamp
status is ON. When the lamp does not come on, the
lamp status is OFF.
• While pulling the switch trigger, the lamp status cannot
be changed.
• For approximately 10 seconds after releasing the
switch trigger, the lamp status can be changed.
Reversing switch action (Fig. 6)
This tool has a reversing switch to change the direction
of rotation. Depress the reversing switch lever from the A
side for clockwise rotation or from the B side for counter-
clockwise rotation.
When the reversing switch lever is in the neutral position,
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 direction of rotation
before the tool stops may damage the tool.
• When not operating the tool, always set the reversing
switch lever to the neutral position.
Changing the impact force (Fig. 7)
014968
The impact force can be changed in four steps: hard,
medium, soft, and T mode.
This allows a tightening suitable to the work.
Every time the button
is pressed, the number of blows
changes in four steps.
“T” is a special mode for fastening self drilling screws. In
this mode, the tool starts to drive a screw with faster rota-
tion, which is suited for drilling with the self-drilling-screw
tip. Once the tool starts to tighten the screw, it impacts in
medium force grade.
For approximately one minute after releasing the switch
trigger, the impact force can be changed.
NOTE:
• When all lamps on the switch panel go out, the tool is
turned off to save the battery power. The impact force
grade can be checked by pulling the switch trigger to
the extent that the tool does not operate.
• While pulling the switch trigger, the impact force grade
cannot be changed.
Impact force grade
displayed on panel
Maximum blows
Application
Work
DTD137
DTD148
Hard
3,600
(min
–1
)
3,800
(min
–1
)
Tightening when force and
speed are desired.
Tightening in underwork
material/Tightening long
screws/Tightening bolts.
Medium
2,600
(min
–1
)
2,600
(min
–1
)
Tightening when a good
finishing is needed.
Tightening in the finishing
board, plaster board.
Soft
1,100
(min
–1
)
1,100
(min
–1
)
Tightening when excessive
tightening need to be avoided
because of potentially
clogged female screw and
broken or damaged screw
head.
Tightening sash screw/
Tightening small screws such
as M6.
T mode
2,600
(min
–1
)
2,600
(min
–1
)
Tightening when speed and
good finishing are needed.
Tightening self drilling screws.
