MAINTENANCE AND INSPECTION ............................................................16
SERVICE PARTS LIST ................................................................................. 18
GENERAL POWER TOOL SAFETY WARNINGS
WARNING
Read all safety warnings and all instructions.
Failure to follow the warnings and instructions may result in electric shock, fi re and/or serious
injury.
Save all warnings and instructions for future reference.
The term “power tool” in the warnings refers to your mains-operated (corded) power tool or
battery-operated (cordless) power tool.
1) Work area safety
a) Keep work area clean and well lit.
Cluttered or dark areas invite accidents.
b) Do not operate power tools in explosive atmospheres, such as in the presence
of fl ammable liquids, gases or dust.
Power tools create sparks which may ignite the dust or fumes.
c) Keep children and bystanders away while operating a power tool.
Distractions can cause you to lose control.
2) Electrical safety
a) Power tool plugs must match the outlet.
Never modify the plug in any way.
Do not use any adapter plugs with earthed (grounded) power tools.
Unmodifi ed plugs and matching outlets will reduce risk of electric shock.
b) Avoid body contact with earthed or grounded surfaces, such as pipes,
radiators, ranges and refrigerators.
There is an increased risk of electric shock if your body is earthed or grounded.
11
Page 12
English
c) Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of electric shock.
d) Do not abuse the cord. Never use the cord for carrying, pulling or unplugging
the power tool.
Keep cord away from heat, oil, sharp edges or moving parts.
Damaged or entangled cords increase the risk of electric shock.
e) When operating a power tool outdoors, use an extension cord suitable for
outdoor use.
Use of a cord suitable for outdoor use reduces the risk of electric shock.
f) If operating a power tool in a damp location is unavoidable, use a residual
current device (RCD) protected supply.
Use of an RCD reduces the risk of electric shock.
3) Personal safety
a) Stay alert, watch what you are doing and use common sense when operating a
power tool.
Do not use a power tool while you are tired or under the infl uence of drugs,
alcohol or medication.
A moment of inattention while operating power tools may result in serious personal
injury.
b) Use personal protective equipment. Always wear eye protection.
Protective equipment such as dust mask, non-skid safety shoes, hard hat, or hearing
protection used for appropriate conditions will reduce personal injuries.
c) Prevent unintentional starting. Ensure the switch is in the off position before
connecting to power source and/or battery pack, picking up or carrying the
tool.
Carrying power tools with your fi nger on the switch or energising power tools that have
the switch on invites accidents.
d) Remove any adjusting key or wrench before turning the power tool on.
A wrench or a key left attached to a rotating part of the power tool may result in
personal injury.
e) Do not overreach. Keep proper footing and balance at all times.
This enables better control of the power tool in unexpected situations.
f) Dress properly. Do not wear loose clothing or jewellery. Keep your hair,
clothing and gloves away from moving parts.
Loose clothes, jewellery or long hair can be caught in moving parts.
g) If devices are provided for the connection of dust extraction and collection
facilities, ensure these are connected and properly used.
Use of dust collection can reduce dust-related hazards.
4) Power tool use and care
a) Do not force the power tool. Use the correct power tool for your application.
The correct power tool will do the job better and safer at the rate for which it was
designed.
b) Do not use the power tool if the switch does not turn it on and off .
Any power tool that cannot be controlled with the switch is dangerous and must be
repaired.
12
Page 13
English
c) Disconnect the plug from the power source and/or the battery pack from the
power tool before making any adjustments, changing accessories, or storing
power tools.
Such preventive safety measures reduce the risk of starting the power tool
accidentally.
d) Store idle power tools out of the reach of children and do not allow persons
unfamiliar with the power tool or these instructions to operate the power tool.
Power tools are dangerous in the hands of untrained users.
e) Maintain power tools. Check for misalignment or binding of moving parts,
breakage of parts and any other condition that may aff ect the power toolʼs
operation.
If damaged, have the power tool repaired before use.
Many accidents are caused by poorly maintained power tools.
f) Keep cutting tools sharp and clean.
Properly maintained cutting tools with sharp cutting edges are less likely to bind and
are easier to control.
g) Use the power tool, accessories and tool bits etc. in accordance with these
instructions, taking into account the working conditions and the work to be
performed.
Use of the power tool for operations diff erent from those intended could result in a
hazardous situation.
5) Service
a) Have your power tool serviced by a qualifi ed repair person using only identical
replacement parts.
This will ensure that the safety of the power tool is maintained.
CAUTION
Keep children and infi rm persons away.
When not in use, tools should be stored out of reach of children and infi rm persons.
PRECAUTIONS ON USING DEMOLITION HAMMER
1. Wear ear protections
Exposure to noise can cause hearing loss.
2. Use auxiliary handles supplied with the tool.
Loss of control can cause personal injury.
3. Hold power tool by insulated gripping surfaces, when performing an operation
where the cutting accessory may contact hidden wiring or its own cord. Cutting
accessory contacting a “live” wire may make exposed metal parts of the power tool
“live” and could give the operator an electric shock.
4. Do not touch the bit during or immediately after operation. The bit becomes very
hot during operation and could cause serious burns.
5. Before starting to break, chip or drill into a wall, fl oor or ceiling, thoroughly confi rm
that such items as electric cables or conduits are not buried inside.
6. Wear a mask when turning your head upward.
13
Page 14
English
7. Properly set the bit holder
8. At the start of work, confi rm screw tightening.
9. When working at a highly elevated location, pay attention to articles and persons
below.
10. Wear protective shoes to protect your feet.
SYMBOL
WARNING
The following show symbols used for the machine. Be sure that you understand their
meaning before use.
Read all safety warnings and all instructions.
SPECIFICATIONS
Voltage
Power Input1340 W
220 V
Full-load Impact Rate1400 /min
Weight (without cord,
side handle)
16.5 kg
STANDARD ACCESSORIES
In addition to the main unit (1 unit), the package contains the accessories listed in the below.
Case1
Bull Point
1
OPTIONAL ACCESSORIES (sold separately)
○
Asphalt Cutting
(1) Cutter
Overall Length: 410 mm
Width: 75 mm
○
Groove Digging and Edging
(1) Cold Chisel
Overall Length: 410 mm
14
Page 15
English
○
Tamping
(2) Shank
Overall Length: 250 mm
(1) Rammer
Outer diameter: 200 mm
○
Grease
500 g (in a can)
30 g (in a tube)
○
Scooping Work
(1) Scoop
Overall Length: 410 mm
APPLICATIONS
Demolishing concrete, chiseling off concrete, grooving, bar cutting.
Application examples:
Installation of piping and wiring, sanitary facility installation, machinery installation, water
supply and drainage work, interior jobs, harbor facilities and other civil engineering works.
PRIOR TO OPERATION
1. Power source
Ensure that the power source to be utilized conforms to the power requirements specifi ed
on the product nameplate.
2. Power switch
Ensure that the power switch is in the OFF position. If the plug is connected to a receptacle
while the power switch is in the ON position, the power tool will start operating immediately,
which could cause a serious accident.
3. Extension cord
When the work area is remote from the power source, use an extension cord of suffi cient
thickness and rated capacity. The extension cord should be kept as short as practicable.
4. Mounting a tool
NOTE
For tools such as a bull point and a cold chisel, use only
genuine HITACHI parts.
(1) Clean, then smear the tool shank with grease or machine oil
(Fig.1).
(2) Rotate the stop lever 180° in a clockwise direction while
pulling it toward you. Next, insert the tool shank into the
hexagonal hole on the front cover (Fig.1).
(3) Clamp the tool by turning the stop lever by half a turn in the
opposite direction (Fig. 2).
Tool shank
Front cover
2
3
Stop lever
Fig.1
Stop lever
1
15
Fig. 2
Page 16
English
HOW TO USE THE DEMOLITION HAMMER
1. Squeeze the trigger switch after applying the tip of the bit to the
crushing position.
In some cases, it is necessary to punch the tip of the bit against the
crushing position forcibly in order to begin the striking motion.
This is not due to malfunction of the tool. It means that the safe guard
mechanism against no-load striking is working.
2. Operate the tool by utilizing its empty weight. The performance will
not be better even if the tool is pressed or thrust forcibly against the
work surface. Hold the tool with a force just suffi cient to counteract the
reaction (Fig. 3).
Fig. 3
GREASE REPLACEMENT
This machine is of full air-tight construction to protect against dust and to prevent lubricant
leakage. Therefore, the machine can be used without lubrication for long periods. Replace the
grease as described below.
Grease Replacement Period
After purchase, replace grease after every 6 months of usage. Ask for grease replacement at the
nearest authorized HITACHI Service Center.
MAINTENANCE AND INSPECTION
CAUTION
Be sure to swith OFF and disconnect the attachment plug from the receptacle to
avoid a serious accident.
1. Inspecting the tool
Since use of a dull tool will degrade effi ciency 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.
16
Page 17
English
4. Inspecting the carbon brushes (Fig. 4)
The Motor employs carbon brushes which are consumable
parts. When they become worn to or near the “wear limit”,
it could result 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 fi gure.
In addition, always keep carbon brushes clean and ensure
that they slide freely within the brush holders.
5. Replacing carbon brushes
Loosen the screws (Hexagon socket hd. bolt M4×8) of
the cap covers, then remove the cap covers (Fig. 5). After
removing the brush caps, the carbon brushes can be
removed.
After replacing the carbon brushes, tighten the brush caps,
then mount the cap covers securely.
6. Service parts list
17 mm
Hexagon socket
hd. bolt M4×8
Wear limit
86
7 mm
Fig. 4
Fig. 5
No. of carbon
brush
Cap cover
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.