Operational Cautions; Maintenance And Inspection - Hitachi DV 14DBL Handling Instructions Manual

11. 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. 14)
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 ect. (See Fig. 14)
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.
12. Automatic spindle-lock mechanism
This unit has automatic spindle-lock mechanism for
quick bit changes.
13. Confirm that the battery is mounted correctly
14. 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. 15) (The
are provided on the push button.)
15. 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.
16. 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.
17. 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. 16).
(2) Loosen the grip to remove the side handle.

OPERATIONAL CAUTIONS

1. 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.

MAINTENANCE AND INSPECTION

1. Inspecting the tool
Since use of as dull tool will degrade efficiency 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. Maintenance of the motor
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.
4. Cleaning on the outside
When the driver drill is stained, wipe with a soft dry
cloth or a cloth moistened with soapy water. Do not
L and R marks
use chloric solvents, gasoline or paint thinner, for
they melt plastics.
5. Storage
Store the driver drill in a place in which the tempera
ture is less than 40°C and out of reach of children.
NOTE:
Storing Lithium Batteries
Make sure the lithium batteries have been fully
charged before storing them.
Prolonged storage of batteries with a low charge
may result in performance deterioration or storage
capacity reduction, and may also render the batteries
incapable of holding a charge.
There are cases in which repeatedly charging and
discharging the batteries two to five times will result
in the full capacity being restored.
Replace the batteries in the event of the capacity not
being restored after repeated recharges.
6. Service parts list
CAUTION:
Repair, modification and inspection of Hitachi Power
Tools must be carried out by a Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the
tool to the Hitachi Authorized Service Center when
requesting repair or other maintenance.
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
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