Maintenance And Inspection - Hitachi Koki DV 18V Instrucciones De Manejo

English
Set the side handle to a position that is suited to the
operation and then securely tighten the side handle grip.
To attach a depth gauge on the side handle, insert the
gauge into the U-shaped groove on the side handle,
adjust the position of the depth gauge in accordance with
the desired depth of the hole, and fi rmly tighten the side
handle grip. (Fig. 6)
8. IMPACT to ROTATION changeover (Fig. 7)
Shift the change lever between the right and left positions
to switch easily between IMPACT (rotation and impact)
and ROTATION (rotation only), respectively.
To bore holes in hard materials such as concrete, stone
and tiles, shift the change lever to the right-hand position
(as indicated by the
The drill bit operates by the combined actions of impact
and rotation.
To bore holes in metal, wood and plastic, shift the change
lever to the left-hand position (as indicated by the mark).
The drill bit operates by rotational action only, as in the
case of a conventional electric drill.
CAUTION
○ Do not use the Impact Drill in the IMPACT function if the
material can be bored by rotation only. Such action will
not only reduce drill effi ciency, but may also damage the
drill tip.
○ Operating the Impact Drill with the change lever in
mid-position may result in damage. When switching,
make sure that you shift the change lever to the correct
position.
9. High-speed/Low-speed changeover
Prior to changing speed, ensure that the switch is in the
OFF position, and the drill has come to a complete stop.
To change speed, rotate the gear shift dial as indicated
by the arrow in Fig. 8. The numeral "1" engraved on the
drill body denotes low speed, the numeral "2" denotes
high speed.
If it is hard to turn the gear shift dial, turn the chuck slightly
in either direction and then turn the gear shift dial again.
HOW TO USE
1. Switch operation
○ When the trigger 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.
○ The desired rotation speed can be pre-selected with the
speed control dial.
Turn the speed control dial clockwise for higher speed
and counterclockwise for lower speed. (Fig. 9)
○ Pulling the trigger and pushing the stopper, it keeps
the switched-on condition which is convenient for
continuous running. When switching off , the stopper can
be disconnected by pulling the trigger again.
CAUTION
If the L-side of push button is pressed for reverse bit
rotation, the stopper cannot be used.
2. Drilling
○ When drilling, start the drill slowly, and gradually
increasing speed as you drill.
○ Always apply pressure in a straight line with the bit. Use
enough pressure to keep drilling, but do not push hard
enough to stall the motor or defl ect the bit.
○ To minimize stalling or breaking through the material,
reduce pressure on drill and ease the bit through the last
part of the hole.
5
mark).
○ If the drill stalls, release the trigger immediately, remove
the bit from the work and start again. Do not click the
trigger on and off in an attempt to start a stalled drill. This
can damage the drill.
○ The larger the drill bit diameter, the larger the reactive
force on your arm.
Be careful not to lose control of the drill because of this
reactive force.
To maintain fi rm control, establish a good foothold,
use side handle, hold the drill tightly with both hands,
and ensure that the drill is vertical to the material being
drilled.

MAINTENANCE AND INSPECTION

1. Inspecting the drill bits
Since use of an abraded drill bits will cause motor
malfunctioning and degraded effi ciency, replace the drill
bits with a new one or resharpening without delay when
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. Inspecting the carbon brushes
For your continued safety and electrical shock protection,
carbon brush inspection and replacement on this tool
should ONLY be performed by a Hitachi Authorized
Service Center.
5. Replacing supply cord
If the supply cord of Tool is damaged, the Tool must be
returned to Hitachi Authorized Service Center for the
cord to be replaced.
6. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION
Repair, modifi cation 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.
MODIFICATION
Hitachi Power Tools are constantly being improved
and modifi ed to incorporate the latest technological
advancements.
Accordingly, some parts (i.e. code numbers and/or
design) may be changed without prior notice.
NOTE
Due to HITACHI's continuing program of research and
development, the specifi cations herein are subject to change
without prior notice.