Prior To Operation; Maintenance And Inspection - Hitachi DN 12DY Handling Instructions Manual

NOTE
The charging time may vary according to temperature
and power source voltage.
4. Disconnect the charger's power cord from the
receptacle
5. Hold the charger fi rmly and pull out the battery
NOTE
After operation, pull out batteries from the charger fi rst,
and then keep the batteries properly.
Regarding electric discharge in case of new
batteries, etc.
As the internal chemical substance of new batteries
and batteries that have not been used for an extended
period is not activated, the electric discharge might be
low when using them the fi rst and second time. This is
a temporary phenomenon, and normal time required for
recharging will be restored by recharging the batteries
2 – 3 times.
How to make the batteries perform longer.
(1) Recharge the batteries before they become completely
exhausted.
When you feel that the power of the tool becomes
weaker, stop using the tool and recharge its battery.
If you continue to use the tool and exhaust the electric
current, the battery may be damaged and its life will
become shorter.
(2) Avoid recharging at high temperatures.
A rechargeable battery will be hot immediately after
use. If such a battery is recharged immediately after
use, its internal chemical substance will deteriorate,
and the battery life will be shortened. Leave the battery
and recharge it after it has cooled for a while.
CAUTION
○ If the batteries has been heated right after operation (for
due to sunlight, etc.), the charger's pilot lamp may not
light in red. In such a case, fi rst let the bettery cool, then
start charging.
○ When the pilot lamp fl ickers in red (at 0.2-second
intervals), check for and take out any foreign objects
in the charger's battery installation hole. If there are no
foreign objects, it is probable that the battery or charger
is malfunctioning. Take it to your authorized Service
Center.
○ Since the built-in micro computer takes about 3
seconds to confi rm that the battery being charged with
UC14YFA is taken out, wait for a minimum of 3 seconds
before reinserting it to continue charging. If the battery
is reinserted within 3 seconds, the battery may not be
properly charged.

PRIOR TO OPERATION

1. Setting up and checking the work environment
Check if the work environment is suitable by following
the precautions.
HOW TO USE
1. Mounting and dismounting of the bit
(1) Mounting the bit
After inserting a driver bit, etc. into the keyless drill
chuck, fi rmly grasp the ring and tighten the sleeve by
turning it toward the right (in the clockwise direction as
viewed from the front) (See Fig. 4).
○ 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
Firmly grasp the ring and loosen the sleeve by turning
it toward the left (in the counter-clockwise direction as
viewed from the front) (See Fig. 4).
○ 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.
2. Confi rm that the battery is mounted correctly
3. 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. 5) (The
marks are provided on the body).
4. Switch operation
○ When the trigger switch is depressed, the tool rotates.
When the trigger is released, the tool stops (Fig. 6).
○ 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.
○ When releasing the trigger of the switch,l the brake will
be applied for immediate stopping.
NOTE
A buzzing noise is produced when the motor is about to
rotate; This is only a noise, not a machine failure.
CAUTION
○ While operating the cordless angle drill, take care not to
lock the motor.
○ If the motor is locked, immediately turn the power off . If
the motor is locked for a while, the motor of battery may
be burnt.
○ When pressing the tool against the object to be drilled,
take care not to touch the keyless chuck with your
hands.
NOTE
The use of the battery EB1230HL 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.

MAINTENANCE AND INSPECTION

1. Inspecting the tool
Since use of as dull tool will degrade effi ciency and
cause possible motor malfunction, sharpen or replace
the tool as soon as abrasion is noted.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that
they are properly tightened. Should any of the screws
be loose, retighten them immediately. Failure to do so
could result in serious hazard.
3. Cleaning on the outside
When the Cordless Angle Drill is stained, wipe with a
soft dry cloth or a cloth moistened with soapy water. Do
not use chloric solvents, gasoline or paint thinner, for
they melt plastics.
4. Storage
Store the Cordless Angle Drill in a place in which the
tempera ture is less than 40°C and out of reach of
children.
English
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