Operational Cautions - Hitachi WH 12DAF2 Handling Instructions Manual

English
NOTE:
Pay attention to the spring orientation. Install the
spring with larger diameter away from you. (Fig. 12)
(3) Using as an auxiliary light
(a) Press the switch to turn off the light.
If forgotten, the light will turn off automatically
after 15 minutes.
(b) The direction of the light can be adjusted within
the range of hook positions 1 - 5. (Fig. 13)
Lighting time
AAAA manganese batteries: approx. 15 hrs.
AAAA alkali batteries: approx. 30 hrs.
CAUTION:
Do not look directly into the light.
Such actions could result in eye injury.
(4) Replacing the batteries
(a) Loosen the hook screw with a phillips-head
screwdriver (No. 1). (Fig. 14)
Remove the hook cover by pushing in the direction
of the arrow. (Fig. 15)
(b) Remove the old batteries and insert the new
batteries. Align with the hook indications and
position the plus (+) and minus (–) terminals
correctly. (Fig. 16)
(c) Align the indentation in the hook main body with
the protuberance of the hook cover, press the
hook cover in the direction opposite to that of the
arrow shown in Fig. 15 and then tighten the screw.
Use commercially available AAAA batteries
(1.5 V).
NOTE:
Do not tighten the screw excessively. Such action
could strip the screw threads.
CAUTION:
Failure to observe the following can result in battery
leakage, rust or malfunction.
Position the plus (+) and minus (–) terminals correctly.
Replace both batteries at the same time. Do not mix
old and new batteries.
Remove exhausted batteries from the hook
immediately.
Do not discard batteries together with normal trash
and do not throw batteries into fire.
Store batteries out of the reach of children.
Use batteries correctly in accordance with the battery
specifications and indications.
2. Check the rotational direction
The bit rotates clockwise (viewed from the rear side)
by pushing the R-side of the push button.
The L-side of the push button is pushed to turn the bit
counterclockwise. (See Fig. 17) (The
are provided on the body.)
CAUTION:
The push button cannot be switched while the impact
driver is turning. To switch the push button, stop the
impact driver, then set the push button.
3. Switch operation
When the trigger switch is depressed, the tool rotates.
When the trigger is released, the tool stops.
The rotational speed can be controlled by varying the
amount that the trigger switch is pulled. Speed is low
when the trigger switch is pulled slightly and increases
as the trigger switch is pulled more.
4. Tightening and loosening screws (WH12DAF2)
Install the bit that matches the screw, line up the bit
in the grooves of the head of the screw, then tighten
it.
11
Push the impact driver just enough to keep the bit
fitting the head of the screw.
CAUTION:
Applying the impact driver for too long tightens the
screw too much and can break it.
Tightening a screw with the impact driver at an angle
to that screw can damage the head of the screw and
the proper force will not be transmitted to the screw.
Tighten with this impact driver lined up straight with
the screw.
5. Number of screws tightenings possible (WH12DAF2)
Please refer to the table below for the number of
screw tightened possible with one charge.
EB1214S
Screw used
Wood screw ø4 × 50
(Soft wood)
Machine screw M8 × 16
These values may vary slightly, according to
surrounding temperature and battery characteristics.
6. Number of bolt tightened possible (WR12DAF2)
Please refer to the table below for the number of bolt
tightened possible with one charge.
EB1214S
Bolt used
M12 × 45 High tension bolt
These values may vary slightly, according to
surrounding temperature and battery characteristics.
NOTE:
The use of the battery EB1226HL in a cold condition
(below 0 degree Centigrade) can sometimes result in
the weakened tightening torque and reduced amount
of work. This, however, is a temporary phenomenon,
and returns to normal when the battery warms up.

OPERATIONAL CAUTIONS

1. Resting the unit after continuous work
After use for continuous bolt-tightening work, rest
the unit for 15 minutes or so when replacing the
battery. The temperature of the motor, switch, etc.,
will rise if the work is started again immediately after
battery replacement, eventually resulting in burnout.
L R
and marks
NOTE:
Do not touch the hammer case, as it gets very hot
during continuous work.
2. Cautions on use of the speed control switch
This switch has a built-in, electronic circuit which
steplessly varies the rotation speed. Consequently,
when the switch trigger is pulled only slightly (low
speed rotation) and the motor is stopped while
continuously driving in screws, the components of
the electronic circuit parts may overheat and be
damaged.
3. Tightening torque
Refer to Fig. 18 and Fig. 19 for the tightening torque
of bolts (according to size), under the conditions
shown in Fig. 20. Please use this example as a general
reference, as tightening torque will vary according to
tightening conditions.
No. of tightenings
Approx. 190
Approx. 500
No. of tightenings
Approx. 87