4
English
MOUNTING AND OPERATION
Action
Figure
Page
Mounting a tool
1
99
Work Mode Setup
2
99
How to drill holes
3
99
How to chisel or demolish*
4
99
Adjustment of the tool position mode
5
99
Switch operation
6
100
Using tapershank adapter
7
100
Removing tapershank adapter
8
100
Using drill chuck and chuck adapter
9
100
Mounting core bit
10
100
Mounting guide plate and center pin
11
100
How to dismount the core bit
12
101
Replacing carbon brushes
13
101
Selecting accessories
―
102, 103
* Operate this Rotary Hammer by utilizing its empty
weight. The performance will not be better even if it is
pressed or thrust forcibly against the work surface.
Hold this Rotary Hammer with a force just su
ffi
cient to
counteract the reaction.
CAUTION
After long time of use, the cylinder case becomes hot.
Therefore, be careful not to burn your hands.
Warming up (Fig. 4)
The grease lubrication system in this unit may require
warming up in cold regions.
Position the end of the bit so makes contact with the
concrete, turn on the switch and perform the warming
up operation. Make sure that a hitting sound is produced
and then use the unit.
CAUTION
When the warming up operation is performed, hold the
side handle and the main body securely with both hands
to maintain a secure grip and be careful not to twist your
body by the jammed drill bit.
GREASE REPLACEMENT
This machine is of full air-tight construction to protect against
dust and to prevent lubricant leakage. This machine can be
used without grease supplement for an extended period of
time. However, perform the grease replacement to maintain
the service life. Replace the grease as described below.
1. Grease Replacement Period
After purchase, replace grease after every 6 months of
usage. Ask for grease replacement at the nearest Hitachi
Authorized Service Center. Proceed for replacement of
grease.
2. How to replace grease
CAUTION
Before replacing the grease, turn the power o
ff
and pull
out the plug from the receptacle.
(1) Remove the crank cover and wipe o
ff
the old grease
inside.
(2) Supply 60 g (the standard volume to cover the
connecting rod) of Hitachi Electric Hammer Grease A to
the crank case.
(3) After replacing the grease, install the crank cover
securely.
NOTE
The Hitachi Electric Hammer Grease A is of the low
viscosity type. When the grease is consumed, purchase
from an authorized Hitachi Service Center.
MAINTENANCE AND INSPECTION
CAUTION
Be sure to switch OFF and disconnect the attachment
plug from the receptacle to avoid a serious accident.
1. Inspecting accessories
Since use of a dull accessory, such as a bull point, a
cutter, etc. will degrade e
ffi
ciency and cause possible
motor malfunction, sharpen or replace with a new one 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. Inspecting the carbon brushes (Fig. 13)
The Motor employs carbon brushes which are
consumable parts. When they become worn to or near
the “wear limit”
ⓐ
, it results in motor trouble.
When an auto-stop carbon brush is equipped, the motor
will stop automatically. At that time, replace both carbon
brushes with new ones which have the same carbon
brush Numbers
ⓑ
shown in the
Fig. 13
. In addition,
always keep carbon brushes clean and ensure that they
slide freely within the brush holders.
5. Replacing carbon brushes
(
Fig. 13
)
Loosen the two set screws and remove the tail cover.
Remove the brush caps and carbon brushes. After
replacing the carbon brushes, do not forget to tighten the
brush caps securely and to install the tail cover.
CAUTION
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
GUARANTEE
We guarantee Hitachi Power Tools in accordance with
statutory/country speci
fi
c regulation. This guarantee does
not cover defects or damage due to misuse, abuse, or
normal wear and tear. In case of complaint, please send
the Power Tool, undismantled, with the GUARANTEE
CERTIFICATE found at the end of this Handling instruction,
to a Hitachi Authorized Service Center.
000Book̲DH38MS.indb 4
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2014/10/30 13:46:55
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