How To Use; Maintenance And Inspection - Hitachi DH 20V Bedienungsanleitung

3. Extension cord
When the work area is removed from the power
source, use an extension cord of sufficient thickness
and rated capacity. The extension cord should be
kept as short as practicable.
4. Mounting the drill bit (Fig.1)
Please operate the model exclusively intended for
the SDS bit as described below.
Fully shift the slide grip of the chuck section in the
direction of arrow and insert the drill bit while rotating
it slowly. Match the drill bit to the square hole in
the slide grip and firmly insert it. The drill bit is firmly
locked in place when the slide grip is returned to
its original position. Remove the drill bit in the reverse
order of installation. Do not fail to use HITACHI
GENUINE DRILL BIT. Although the chuck section is
of dust-proof construction, the movement of slide
grip may become dull due to concrete dust after the
machine has been used for long periods. Lubricate
the sliding part of the slide grip.
5. Mounting the dust cup (Fig.2)
When it is necessary to drill a hole with the drill
bit facing upward, such as drilling holes in a ceiling,
use of a dust cup will minimize falling particles to
attain easy drilling work. Mount the dust cup to the
drill bit as shown in Fig.2.
When using a large drill bit, enlarge the hole in the
center when mounting it on the drill bit.

HOW TO USE

Please operate the model exclusively intended for the
SDS bit as described below.
1. Switch operation
The rotational speed of the drill bit can be controlled
by varying the amount that the trigger switch is
pulled. Speed is low when the trigger switch is
pulled slightly and increaes when the switch is
pulled more.
2. Rotation + striking
This hammer drill can be set to rotation and striking
mode by rotating the selector lever fully counter-
clockwise to mark. (Fig.3)
(1) Mount the drill bit
(2) Pull the trigger switch after placing the drill bit tip
in the drilling position. (Fig.4)
(3) Pushing the hammer drill forcibly is not necessary.
It is sufficient to push slightly so that drill dust
comes out gradually.
CAUTION
When the drill bit touches construction iron bar, the
bit will stop immediately and the hammer drill react
to revolving. Therefore, grip the side handle and
handle tightly.
3. Rotation only
The hammer drill can be set to rotation only mode
by rotating the selector lever fully clockwise to
mark. (Fig.5)
(1) Attach the drill chuck and chuck adapter (optional
accessories). The hammer drill can be used for
drilling of steel and wood materials with these
accessories.
In order to attach the accessories, fully withdraw
the slide grip of chuck section in the direction of
the arrow in Fig.6.
Slightly insert the chuck adapter into the square
hole of the slide grip by rotating; fully insert the
chuck adapter after it is matched with the square
hole. Return the slide grip to its original position
so that the chuck adapter is locked tight.
For removal of the accessories, reverse the above
procedures.
(2) Application of excessive force will not expedite the
work, but will only deteriorate the tip edge of the
drill bit resulting in reduced service life of the
hammer drill.
(3) When the hole is nearly completed, the drill bit
sometimes breaks. When the hole is nearly
completed, release the pushing force.
CAUTION
After drilling is finished, always disconnect the plug
from the receptacle.
4. How to use the drill bit (taper shank) and the taper
shank adapter
(1) Mount the taper shank adapter to the hammer drill.
(Fig.7)
(2) Mount the dill bit (taper shank) to the taper shank
adapter. (Fig.7)
(3) Turn the switch ON, and drill a hole of prescribed
depth.
(4) To remove the drill bit (taper shank), insert the
cotter into the slot of the taper shank adapter that
is supported by the rest and strike the head of the
cotter with a hammer (Fig.8).
5. How to use the stopper
Fixing the stopper (Fig.9)
(1) Loosen the side handle and insert the linear part
of the stopper into the fitting hole of the handle
holder from the chuck section side.
(2) Move the stopper to its prescribed position while
the side handle is left loosened, then rotate the side
handle clockwise to fix the stopper.
LUBRICATION
Low viscosity grease should be applied to this hammer
drill so that it can be used for a long period without
replacing the grease. Please contact the nearst service
agent for grease replacement if grease leaks from
loosened screws.
Continued use of the hammer drill despite a grease
shortage will cause reduction of the service life.
CAUTION
The specified grease should be used in this machine.
Therefore, the normal performance of the machine may
be negatively affected by use of another grease. Please
be sure to ask our service agent for replacement of the
grease.

MAINTENANCE AND INSPECTION

CAUTION
Be sure to run power OFF and disconnect the plug
during maintenance and inspection.
1. Inspecting the drill bits
Since use of a dull drill bit will cause motor
malfunctioning and reduced efficiency, replace the
drill bit with a new one or resharpen without delay
when abrasion is noted.
English
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