Operational Cautions; Maintenance And Inspection - Hitachi DS 14DL2 Handling Instructions Manual

8. How to use the LED 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. 15)
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. 16)
○ 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. 16)
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 11 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. Confi rm 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. 17) (The
are provided on the body.)
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 <DV14DL2 / DV18DL2>
Excessive pressing force never increases drilling speed.
It will not only damage the drill tip or reduce working
effi ciency, 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.
15. Installing/Removing the side handle
CAUTION
Firmly install the side handle. If loose, the side handle
may gyrate or fall out and cause bodily injury.
(1) Install the side handle so that the protrusions on the main
unit and grooves on the side handle interlock.
Tighten the grip after checking that the side handle is not
riding on the slip prevention protrusion (Fig. 20).
(2) Loosen the grip to remove the side handle.

OPERATIONAL CAUTIONS

○ Resting the unit after continuous work

MAINTENANCE AND INSPECTION

1. Inspecting the tool
2. Inspecting the mounting screws
3. Maintenance of the motor
4. Inspecting the carbon brushes (Fig. 21)
NOTE:
5. Replacing carbon brushes
and marks
L R
CAUTION:
6. Cleaning of the outside
7. Storage
NOTE
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.
Since use of a dull tool will degrade effi ciency and cause
possible motor malfunction, sharpen or replace the tool
as soon as abrasion is noted.
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.
The motor unit winding is the very "heart" of the power
tool.
Exercise due care to ensure the winding does not
become damaged and/or wet with oil or water.
The motor employs carbon brushes which are
consumable parts. Since and excessively worn carbon
brush can result in motor trouble, replace the carbon
brush with new ones when it becomes worn to or near
the "wear limit". In addition, always keep carbon brushes
clean and ensure that they slide freely within the brush
holders.
When replacing the carbon brush with a new one, be sure
to use the Hitachi Carbon Brush Code No. 999054.
Take out the carbon brush by fi rst removing the brush
cap and then hooking the protrusion of the carbon brush
with a fl at head screw driver, etc., as shown in Fig. 23.
When installing the carbon brush, choose the direction
so that the nail of the carbon brush agrees with the
contact portion outside the brush tube. Then push it in
with a fi nger as illustrated in Fig. 24. Lastly, install the
brush cap.
Be absolutely sure to insert the nail of the carbon brush
into the contact portion outside the brush tube. (You can
insert whichever one of the two nails provided).
Caution must be exercised since any error in this
operation can result in the deformed nail of the carbon
brush and may cause motor trouble at an early stage.
When the driver 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.
Store the driver drill in a place in which the temperature is
less than 40°C and out of reach of children.
Make sure that the battery is fully charged when stored
for a long period (3 months or more). The battery with
smaller capacity may not be able to be charged when
used, if stored for a long period.
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