Maintenance And Inspection - Hitachi Koki DH 24DV Bedienungsanleitung

The rotational speed of the rotary hammer can be
controlled by varying the amount that the switch
trigger is pulled. Speed is low when the switch
trigger is pulled slightly and increases as the switch
trigger is pulled more.
When releasing the switch trigger, the brake will
be applied for immediate stopping.
2. Rotation + Striking
Align the " " mark with the "
rotating the change lever to set the "Rotation +
Striking" mode (Fig. 8).
(1) Mount the drill bit.
(2) Pull the trigger switch after applying the drill bit
tip to the drilling position (Fig. 10).
(3) Pushing the rotary hammer forcibly is not necessary
at all. Pushing slightly so that drill dust comes out
gradually is just sufficient.
CAUTION
When the drill bit touches construction iron bar, the
bit will stop immediately and the rotary hammer
will react to revolve. Therefore please grip the side
handle and handle tightly as shown in Fig. 10.
3. Rotation only
Align the " " mark with the "
the change lever to set the "Rotation only" mode
(Fig. 8).
To drill a wood or metal material using the optional
drill chuck and chuck adapter, proceed as follows.
Installing drill chuck and chuck adapter: (Fig. 11)
(1) Attach the drill chuck to the chuck adaptor.
(2) The part of the SDS-plus shank is the same as the
drill bit. Therefore, refer to the item of "Mounting
the drill bit" for attaching it.
CAUTION
Application of force more than necessary will not
only expedite work at all, but will deteriorate the
tip edge of the drill bit and reduce the service life
of the rotary hammer in addition.
Drill bit may snap off while withdrawing the rotary
hammer from the drilled hole. For withdrawing, it
is important to use a pushing motion.
Do not attempt to use the rotary hammer in the
rotation and striking mode with the drill chuck and
chuck adapter attached. This would seriously shorten
the service life of every component of the machine.
4. When driving wood screws (Fig. 13)
(1) Selecting a suitable driver bit
Employ plus-head screws, if possible, since the
driver bit easily slips off the heads of slotted-head
screws.
(2) Tightening wood screws
Prior to tightening wood screws, make pilot holes
suitable for them in the wooden board. Apply the
bit to the screw head grooves and gently drive the
screws in the holes.
CAUTION
Exercise care in preparing a pilot hole suitable for
the wood screw taking the hardness of the wood
into consideration. Should the hole be excessively
small or shallow, requiring much power to drive
the screw into it, the thread of the wood screw may
sometimes be damaged.
5. Using depth gauge (Fig. 12)
(1) Loosen the knob on the side handle, and insert the
depth gauge into the mounting hole on the side
handle.
(2) Adjust the depth gauge position according to the
6. How to use the drill bit (taper shank) and the taper
(1) Mount the taper shank adapter to the rotary hammer
(2) Mount the drill bit (taper shank) to the taper shank
" mark by (3) Turn the switch ON, and drill a hole to prescribed
(4) To remove the drill bit (taper shank), insert the
7. Switching between the "SAVE" and the "POWER"
(1) "SAVE" mode ... decreased hammering force
(2) "POWER" mode ... increased hammering force
" mark by rotating
CAUTION
LUBRICATION
Low viscosity grease is applied to this rotary hammer so
that it can be used for a long period without replacing the
grease. Please contact the nearest service center for
grease replacement when any grease is leaking form
loosened screw.
Further use of the rotary hammer despite the grease
shortage causes damage to reduce the service life.
CAUTION
A specific grease (FG-6A) is used with this machine,
therefore, the normal performance of the machine may
be badly affected by use of different grease. Please be
sure to let one of our service centers to undertake
replacement of the grease.

MAINTENANCE AND INSPECTION

1. Inspecting the tool
2. Inspecting the mounting screws
3. Maintenance of the motor
depth of the hole and tighten the knob bolt securely.
shank adapter
(Fig. 14).
adapter (Fig. 14).
depth.
cotter into the slot of the taper shank adapter and
strike the head of the cotter with a hammer
supporting on the rest (Fig. 15).
modes
The hammering force of the hammer can be
increased or decreased to conform with intended
usage, by operating the shift knob as per Fig. 16.
Adjust the force to match the usage intended.
This can prevent thin drill bits which are less than
5 mm in diameter, from being bent or broken.
This can be used to speedily and efficiently drill
holes when the drill bits which are being used are
greater than 5 mm in diameter.
This can be used to drill holes into wood or metal.
Do not drill holes in wood with the "SAVE" mode.
There is a likelihood that the motor will burn out
because it can easily lock up due to the low power.
Since use of a dull tool will degrade efficiency 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.
English
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