Operational Cautions - Hitachi DV 14DBEL Bedienungsanleitung

English
CAUTION
The selection examples shown in Table 5 should be
considered as general standard. As different types of
tightening screws and different materials to be
tightened are used in actual works proper adjustments
are naturally necessary.
When using the impact driver drill with a machine
screw at HIGH (high speed), a screw may damage or
a bit may loose due to the tightening torque is too
strong. Use the driver drill at LOW (low speed) when
using a machine screw.
NOTE
The use of the battery 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.
When using the unit as an impact drill, prolonged
operation of 5 minutes or more will result in internal
heat which may cause a repeated noise other than
the sound normally emitted by the motor. This does
not indicate a malfunction.
Discontinuing use of the unit and allowing its internal
temperature to cool down will eliminate the noise.
For prolonged use, allow the unit to cool down
periodically.
7. Using the hook
The hook is used to hang up the power tool to your
waist belt while working.
CAUTION
When using the hook, hang up the power tool firmly
not to drop accidentally.
If the power tool is dropped, it may lead to an accident.
When carrying the power tool with hooked to your
waist belt, do not fit any bit to the tip of power tool. If
the sharp bit such as drill is fitted to the power tool
when carrying it with hooked to your waist belt, you
will be injured.
Install securely the hook. Unless the hook is securely
installed, it may cause an injury while using.
(1) Removing the hook.
Remove the screws fixing the hook with Phillips screw
driver. (Fig. 9)
(2) Replacing the hook and tightening the screws.
Install securely the hook in the groove of power tool
and tighten the screws to fix the hook firmly. (Fig. 10)
8. Using the light
Pull the trigger switch to light up the light. The light
keeps on lighting while the trigger switch is being
pulled. The light goes out after releasing the trigger
switch. (Fig. 11)
(The light automatically goes out 10 seconds after
releasing the trigger switch.)
CAUTION
Do not expose directly your eye to the light by looking
into the light.
If your eye is continuously exposed to the light, your
eye will be hurt.
9. Mounting and dismounting of the bit
(1) Mounting the bit
Loosen the sleeve by turning it toward the left (in the
counterclockwise direction as viewed from the front)
to open the clip on the keyless chuck. After inserting
a driver bit, etc., into the keyless drill chuck, and
tighten the sleeve by turning it toward the right (in
the clockwise direction as viewed from the front).
(See Fig. 12)
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If the sleeve becomes loose during operation, tighten
it further.
The tightening force becomes stronger when the
sleeve is tightened additionally.
(2) Dismounting the bit
Loosen the sleeve by turning it toward the left (in the
counterclockwise direction as viewed from the front),
and then take out the bit etc. (See Fig. 12)
NOTE
If the sleeve is tightened in a state where the clip of
the keyless chuck is opened to a maximum limit, a
click noise may occur. This is the noise that occurs
when the loosening of the keyless chuck is prevented
and is not a malfunction.
CAUTION
When it is no longer possible to loosen the sleeve,
use a vise or similar instrument to secure the bit. Set
the clutch mode between 1 and 7 and then turn the
sleeve to the loose side (left side) while operating the
clutch. It should be easy now to loosen the sleeve.
10. Automatic spindle-lock mechanism
This unit has automatic spindle-lock mechanism for
quick bit changes.
11. Confirm that the battery is mounted correctly
12. Check the rotational direction
The bit rotates clockwise (viewed from the rear side)
by pushing the R-side of the selector button.
The L-side of the selector button is pushed to turn the
bit counterclockwise. (See Fig. 13) (The
marks are provided on the body.)
CAUTION
Always use this unit with clockwise rotation, when
using it as an impact drill.
13. Switch operation
When the trigger switch is depressed, the tool rotates.
When the trigger is released, the tool stops.
The rotational speed of the drill 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.
NOTE
A buzzing noise is produced when the motor is about
to rotate; This is only a noise, not a machine failure.
14. For drilling into brick
Excessive pressing force never increases drilling
speed. It will not only damage the drill tip or reduce
working efficiency, but could also shorten the service
life of drill bit. Operate the impact driver drill within
10-15 kg pressing force while drilling into brick.

OPERATIONAL CAUTIONS

Resting the unit after continuous work
(1) The power tool is equipped with a temperature
protection circuit to protect the motor.
Continuous bolt-tightening work may cause the
temperature of the unit to rise, activating the
temperature protection circuit and automatically
stopping operation.
If this happens, allow the power tool to cool before
resuming use.
(2) After use for continuous tightening wood screw
works, 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.
and