Hitachi DH 30PC2 Safety Instructions And Instruction Manual

DH 30PC2

DOUBLE INSULATION

DOUBLE ISOLATION

AISLAMIENTO DOBLE

MODE D’EMPLOI ET INSTRUCTIONS DE SECURITE

AVERTISSEMENT

Une utilisation incorrecte et dangereuse de cet outil motorisé peut entraîner la

mort ou de sérieuses blessures corporelles!

Ce mode d’emploi contient d’importantes informations à propos de la sécurité

de ce produit. Prière de lire et de comprendre ce mode d’emploi avant d’utiliser

l’outil motorisé. Garder ce mode d’emploi à la disponibilité des autres utilisateurs

avant qu’ils utilisent l’outil motorisé.

INSTRUCTION MANUAL AND SAFETY INSTRUCTIONS

WARNING

Improper and unsafe use of this power tool can result in death or serious bodily

injury!

This manual contains important information about product safety. Please read

and understand this manual before operating the power tool. Please keep this

manual available for others before they use the power tool.

MANUAL DE INSTRUCCIONES E INSTRUCCIONES DE SEGURIDAD

ADVERTENCIA

¡La utilización inapropiada e insegura de esta herramienta eléctrica puede

resultar en lesiones serias o en la muerte!

Este manual contiene información importante sobre la seguridad del producto.

Lea y comprenda este manual antes de utilizar la herramienta eléctrica. Guarde

este manual para que puedan leerlo otras personas antes de que utilicen la

herramienta eléctrica.

Model

Rotary Hammer

Modèle

Marteau rotatif

Modelo

Martillo perforador

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CONTENTS

English

Page

IMPORTANT SAFETY INFORMATION

..... 3

MEANINGS OF SIGNAL WORDS ...... 3

SAFETY ................................................... 3

GENERAL POWER TOOL SAFETY WARNINGS

... 3

SPECIFIC SAFETY RULES AND SYMBOLS

..... 4

DOUBLE INSULATION FOR SAFER

OPERATION ..................................... 5

FUNCTIONAL DESCRIPTION ................ 7

NAME OF PARTS ................................ 7

SPECIFICATIONS ................................ 7

Page

ASSEMBLY AND OPERATION .............. 8

APPLICATIONS ................................... 8

PRIOR TO OPERATION ....................... 8

HOW TO USE .................................... 10

HOW TO USE THE CORE BIT (FOR LIGHT LOAD)

... 14

MAINTENANCE AND INSPECTION .... 16

ACCESSORIES ...................................... 18

STANDARD ACCESSORIES ............. 18

OPTIONAL ACCESSORIES .................. 19

PARTS LIST .......................................... 66

TABLE DES MATIERES

Français

Page

INFORMATIONS IMPORTANTES DE SÉCURITÉ

... 24

SIGNIFICATION DES MOTS

D’AVERTISSEMENT ......................... 24

SECURITE ............................................. 24

AVERTISSEMENTS DE SÉCURITÉ GÉNÉRAUX

CONCERNANT LES OUTILS ÉLECTRIQUES ...

24

REGLES DE SECURITE SPECIFIQUES ET SYMBOLES

... 26

DOUBLE ISOLATION POUR UN

FONCTIONNEMENT PLUS SUR

........ 27

DESCRIPTION FONCTIONNELLE ........ 28

NOM DES PARTIES .......................... 28

SPECIFICATIONS .............................. 28

Page

ASSEMBLAGE ET FONCTIONNEMENT ....

29

APPLICATIONS ................................. 29

AVANT L’UTILISATION .................... 29

UTILISATION ..................................... 31

COMMENT UTILISER LA COURONNE (POUR

UNE CHARGE LEGERE)

.........................

35

ENTRETIEN ET INSPECTION............... 37

ACCESSOIRES ...................................... 39

ACCESSOIRES STANDARD ............. 39

ACCESSOIRES SUR OPTION .............. 40

LISTA DES PIÈCES ............................... 66

ÍNDICE

Español

Página

INFORMACIÓN IMPORTANTE SOBRE SEGURIDAD ...

45

SIGNIFICADO DE LAS PALABRAS DE

SEÑALIZACIÓN ................................. 45

SEGURIDAD ......................................... 45

ADVERTENCIAS DE SEGURIDAD GENERAL

DE LA HERRAMIENTA ELÉCTRICA

.... 45

NORMAS Y SÍMBOLOS ESPECÍFICOS DE SEGURIDAD

..... 47

AISLAMIENTO DOBLE PARA OFRECER UNA

OPERACIÓN MÁS SEGURA

................... 48

DESCRIPCIÓN FUNCIONAL ................ 49

NOMENCLATURA ............................. 49

ESPECIFICACIONES .......................... 49

Página

MONTAJE Y OPERACIÓN ................... 50

APLICACIONES ................................. 50

ANTES DE LA OPERACIÓN .............. 50

COMO SE USA .................................. 52

MODO DE USAR LA BARRENA TUBULAR

(PARA CARGAS LIGERAS)

................ 56

MANTENIMIENTO E INSPECCIÓN ..... 58

ACCESORIOS ....................................... 60

ACCESORIOS ESTÁNDAR ............... 60

ACCESORIOS OPCIONALES ............ 61

LISTA DE PIEZAS ................................. 66

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IMPORTANT SAFETY INFORMATION

Read and understand all of the safety precautions, warnings and operating instructions in the Instruction Manual

before operating or maintaining this power tool.

Most accidents that result from power tool operation and maintenance are caused by the failure to observe basic

safety rules or precautions. An accident can often be avoided by recognizing a potentially hazardous situation

before it occurs, and by observing appropriate safety procedures.

Basic safety precautions are outlined in the “SAFETY” section of this Instruction Manual and in the sections which

contain the operation and maintenance instructions.

Hazards that must be avoided to prevent bodily injury or machine damage are identified by WARNINGS on the

power tool and in this Instruction Manual.

NEVER use this power tool in a manner that has not been specifically recommended by HITACHI.

MEANINGS OF SIGNAL WORDS

WARNING indicates a potentially hazardous situations which, if ignored, could result in death or serious injury.

CAUTION indicates a potentially hazardous situations which, if not avoided, may result in minor or moderate

injury, or may cause machine damage.

NOTE emphasizes essential information.

SAFETY

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, fire 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

flammable 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.

Unmodified 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.

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 influence of drugs, alcohol or

medication.

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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 finger 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.

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 affect the power tool’s 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 different

from those intended could result in a

hazardous situation.

5) Service

a) Have your power tool serviced by a qualified

repair person using only identical

replacement parts.

This will ensure that the safety of the power

tool is maintained.

SPECIFIC SAFETY RULES AND SYMBOLS

1. Wear ear protectors.

Exposure to noise can cause hearing

loss.

2. Use auxiliary handles, if supplied with the tool.

Loss of control can cause personal injury.

3. Hold power tools by insulated gripping surfaces

when performing an operation where the cutting

tool 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. NEVER touch the tool bit with bare hands after

operation.

5. NEVER wear gloves made from materials likely to

roll up such as cotton, wool, cloth or string, etc.

6. ALWAYS attach the side handle and securely grip

the Rotary Hammer.

7. NEVER touch moving parts.

NEVER place your hands, fingers or other body

parts near the tool’s moving parts.

8. NEVER operate without all guards in place.

NEVER operate this tool without all guards or

safety features in place and in proper working

order. If maintenance or servicing requires the

removal of a guard or safety feature, be sure to

replace the guard or safety feature before resuming

operation of the tool.

9. Use right tool.

Don’t force small tool or attachment to do the job

of a heavy-duty tool.

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Don’t use tool for purpose not intended —for

example— don’t use circular saw for cutting tree

limbs or logs.

10. NEVER use a power tool for applications other

than those specified.

NEVER use a power tool for applications other than

those specified in the Instruction Manual.

11. Handle tool correctly.

Operate the tool according to the instructions

provided herein. Do not drop or throw the tool.

NEVER allow the tool to be operated by children,

individuals unfamiliar with its operation or

unauthorized personnel.

12. Keep all screws, bolts and covers tightly in place.

Keep all screws, bolts, and plates tightly mounted.

Check their condition periodically.

13. Do not use power tools if the plastic housing or

handle is cracked.

Cracks in the tool’s housing or handle can lead to

electric shock. Such tools should not be used until

repaired.

14. Blades and accessories must be securely mounted

to the tool.

Prevent potential injuries to youself or others.

Blades, cutting implements and accessories which

have been mounted to the tool should be secure

and tight.

15. Keep motor air vent clean.

The tool’s motor air vent must be kept clean so

that air can freely flow at all times. Check for dust

build-up frequently.

16. Operate power tools at the rated voltage.

Operate the power tool at voltages specified on its

nameplate.

If using the power tool at a higher voltage than

the rated voltage, it will result in abnormally fast

motor revolution and may damage the unit and

the motor may burn out.

17. NEVER use a tool which is defective or operating

abnormally.

If the tool appears to be operating unusually,

making strange noises, or otherwise appears

defective, stop using it immediately and arrange

for repairs by a Hitachi authorized service center.

18. NEVER leave tool running unattended. Turn power

off.

Don’t leave tool until it comes to a complete stop.

19. Carefully handle power tools.

Should a power tool be dropped or struck against

hard materials inadvertently, it may be deformed,

cracked, or damaged.

20. Do not wipe plastic parts with solvent.

Solvents such as gasoline, thinner benzine, carbon

tetrachloride, and alcohol may damage and crack

plastic parts. Do not wipe them with such solvents.

Wipe plastic parts with a soft cloth lightly

dampened with soapy water and dry thoroughly.

21. ALWAYS wear eye protection that meets the

requirement of the latest revision of

ANSI Standard Z87.1.

22. ALWAYS be careful with buried object such as an

underground wiring.

Touching live wiring or electric cable with this tool

may result in electric shock.

Confirm before use whether hidden objects are

present, such as electric cables within the wall,

floor or ceiling.

23. Definitions for symbols used on this tool

V ............... volts

Hz ............. hertz

A ............... amperes

n

o .............. no load speed

W .............. watt

............. Class II Construction

---/min ...... revolutions per minute

.............. Alternating current

DOUBLE INSULATION FOR SAFER

OPERATION

To ensure safer operation of this power tool, HITACHI

has adopted a double insulation design. “Double

insulation” means that two physically separated

insulation systems have been used to insulate the

electrically conductive materials connected to the power

supply from the outer frame handled by the operator.

Therefore, either the symbol “ ” or the words “Double

insulation” appear on the power tool or on the

nameplate.

Although this system has no external grounding, you

must still follow the normal electrical safety precautions

given in this Instruction Manual, including not using the

power tool in wet environments.

To keep the double insulation system effective, follow

these precautions:

䡬

Only HITACHI AUTHORIZED SERVICE CENTER

should disassemble or assemble this power tool,

and only genuine HITACHI replacement parts

should be installed.

䡬

Clean the exterior of the power tool only with a

soft cloth moistened with soapy water, and dry

thoroughly.

Never use solvents, gasoline or thinners on plastic

components; otherwise the plastic may dissolve.

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SAVE THESE INSTRUCTIONS

AND

MAKE THEM AVAILABLE TO

OTHER USERS

AND

OWNERS OF THIS TOOL!

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SPECIFICATIONS

Motor Single-Phase, Series Commutator Motor

Power Source Single-Phase, 120V 60Hz

Current 7.4A

Capacity Concrete: 5/32" – 1-3/16" (4mm – 30mm)

Steel: 1/2" (13mm)

Wood: 1-1/4" (32mm)

No-Load Speed 0 – 850/min.

Full-load Impact Rate 0 – 3,700/min.

Weight 9.5 lbs (4.3 kg)

FUNCTIONAL DESCRIPTION

NOTE:

The information contained in this Instruction Manual is designed to assist you in

the safe operation and maintenance of the power tool.

NEVER operate, or attempt any maintenance on the tool unless you have first

read and understood all safety instructions contained in this manual.

Some illustrations in this Instruction Manual may show details or attachments

that differ from those on your own power tool.

NAME OF PARTS

Housing

Nameplate

Drill bit

Tail cover

Grip

Side handle

Change lever

Stopper

Trigger

Set screw (under the tail cover)

Handle

Brush cap

(inside the tail cover)

Fig. 1

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APPLICATIONS

Rotation and hammering function

Drilling anchor holes

Drilling holes in concrete

Drilling holes in tile

Rotation only function

Drilling in steel or wood (with optional accessories).

Tightening machine screws, wood screws (with optional accessories).

Hammering only function

Light-duty chiselling of concrete, groove digging and edging.

PRIOR TO OPERATION

1. Power source

Ensure that the power source to be utilized conforms to the power source re-

quirements specified on the product nameplate.

2. Power switch

Ensure that the switch is in the OFF position. If the plug is connected to a recep-

tacle while the switch is in the ON position, the power tool will start operating

immediately and can cause serious injury.

3. Extension cord

When the work area is far away from the power source, use an extension cord of

sufficient thickness and rated capacity. The extension cord should be kept as

short as practicable.

WARNING:

Damaged cord must be replaced or repaired.

4. Check the receptacle

If the receptacle only loosely accepts the plug, the receptacle must be repaired.

Contact a licensed electrician to make appropriate repairs.

If such a faulty receptacle is used, it may cause overheating, resulting in a seri-

ous hazard.

ASSEMBLY AND OPERATION

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5. Confirming condition of the environment:

Confirm that the work site is placed under appropriate conditions conforming to

prescribed precautions.

6. Mounting the drill bit (Fig. 2)

CAUTION:

To prevent accidents, make sure to turn

the switch off and disconnect the plug

from the receptacle.

NOTE:

When using tools such as bull points,

drill bits, etc., make sure to use the

genuine parts designated by our

company.

(1) Clean the shank portion of the drill bit.

(2) To attach a drill bit (SDS-plus shank),

fully pull the grip in the direction of the

arrow as shown in Fig. 2 and insert the

drill bit as far as it will go while manu-

ally turning.

(3) By releasing the grip, the drill bit will

be secured.

(4) To remove the drill bit, fully pull the grip

in the direction of the arrow and pull

out the drill bit.

7. Installation of dust cup (Optional

accessories) (Fig. 3)

When using a rotary hammer for up-

ward drilling operations attach a dust

cup to collect dust or particles for easy

operation.

Installing the dust cup

Use the dust cup by attaching to the

drill bit a shown in Fig. 3.

When using a bit which has big

diameter, enlarge the center hole of the

dust cup with this rotary hammer.

CAUTION:

The dust cup is for exclusive use of concrete drilling work. Do not use them for

wood or metal drilling work.

Dump particles after every two or three holes when drilling.

Drill bit

Part of SDS-plus

shank

Grip

Front cap

Fig. 2

Dust cup

Fig. 3

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8. Selecting the driver bit

Screw heads or bits will be damaged should an inappropriate bit for the screw

diameter be employed to drive in the screws.

9. Selecting the function mode

You can switch functions to the 3 modes of “hammering only, “rotation +

hammering”, and “rotation only” by turning the change lever while pressing

the push button. Set the

mark position of the change lever to that of the mode

to be used.

CAUTION:

Before operating the change lever, check and make sure that the motor has

stopped.

A failure can occur if it is operated while the motor is running.

To operate the change lever, press the push button, and release the lock of the

change lever. Also, check and make sure after operation that the push button

has returned and that the change lever has been locked.

Switch the change lever without mistake. If it is used at a position halfway,

there is a fear that the service life of the switching mechanism may be shortened.

HOW TO USE

CAUTION:

To prevent accidents, make sure to turn the switch off and disconnect the plug

from the receptacle when the drill bits and other various parts are installed or

removed. The power switch should also be turned off during a work break and

after work.

1. Switch operation

The rotation speed of the drill bit can be controlled steplessly by varying the

amount that the trigger switch is pulled. Speed is low when the trigger switch is

pulled slightly and increases as the switch is pulled more.

2. Rotation + Hammering

This rotary hammer can be set to

rotation and hammering mode by

pressing the push button and turning

the change lever to

mark. (Fig. 4)

Turn the grip slightly and confirm that

the clutch has been engaged with a

click.

Fig. 4

Change lever

Push

button

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(1) Mount the drill bit.

(2) Pull the trigger switch after applying the

drill bit tip to the drilling position (Fig. 5)

(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 an iron reinforcing rod, 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. 5.

3. Rotation only

This rotary hammer can be set to

rotation only mode by pressing the

push button and turning the change

lever to

mark. (Fig. 6)

Turn the grip slightly and confirm that

the clutch has been engaged with a

click.

To drill a wood or metal material using

the separately sold drill chuck and chuck

adaptor, proceed as follows. Installing

drill chuck and chuck adaptor (Fig. 7):

(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 reducing drilling

efficiency 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 drill anchor holes or holes in concrete with the main unit in

the rotation only function.

Do not attempt to use the rotary hammer in the rotation and hammering func-

tion with the drill chuck and chuck adaptor attached. This would seriously shorten

the service life of every components of the machine.

Fig. 5

Fig. 6

Change lever

Push

button

Front cap

Grip

Fig. 7

Chuck

adaptor

Drill

chuck

Part of SDS-plus

shank

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4. When driving machine screws

(Fig. 8)

First, insert the bit into the socket in the

end of chuck adaptor (D).

Next, mount chuck adaptor (D) on the

main unit using procedures described

in 6 (1), (2), (3), put the tip of the bit in

the slots in the head of the screw, grasp

the main unit and tighten the screw.

CAUTION:

Exercise care not to excessively prolong driving time, otherwise, the screws

may be damaged by excessive force.

Apply the rotary hammer perpendicularly to the screw head when driving a

screw; otherwise, the screw head or bit will be damaged, or driving force will

not be fully transferred to the screw.

Do not attempt to use the rotary hammer in the rotation and hammering func-

tion with chuck adaptor (D) and bit attached.

5. When driving wood screws (Fig. 8)

(1) Selecting a suitable driver bit

Employ phillips screws, if possible, since the driver bit easily slips off the heads

of slotted-head screws.

(2) Driving in wood screws

Prior to driving in 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 into

the holes.

After rotating the rotary hammer at low speed for a while until a wood screw in

partly driven into the wood, squeeze the trigger more strongly to obtain the

optimum driving force.

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.

Bit

Socket

Chuck

adaptor (D) Front cap

Grip

Fig. 8

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6. Hammering only

This rotary hammer can be set to

hammering only mode by pressing the

push button and turning the change

lever to

mark. (Fig. 9)

(1) Mount the bull point or cold chisel.

(2) Press the push button and set the

change lever to

mark.

The rotation is released, turn the grip

and adjust the cold chisel to desired

position. (Fig. 10)

(3) Turn the change lever to

mark.

(Fig. 9)

Then bull point or cold chisel is locked.

7. Using the stopper (Fig. 11)

(1) Loosen the side handle, and insert the

stopper into the handle bolt hole.

(2) Adjust the stopper position according

to the depth of the hole and tighten the

side handle securely.

8. How to use the drill bit (taper shank)

and the taper shank adaptor.

(1) Mount the taper shank adaptor to the

rotary hammer. (Fig. 12)

(2) Mount the drill bit (taper shank) to the

taper shank adaptor. (Fig. 12)

(3) Turn the switch ON, and drill a hole in

prescribed depth.

(4) To remove the drill bit (taper shank),

insert the cotter into the slot of the taper

shank adaptor and strike the head of

the cotter with a hammer supporting

on the rests. (Fig. 13)

Fig. 10

Grip

Handle bolt

Stopper

Knob on side

handle

Fig. 11

Change lever

Push button

Fig. 9

Fig. 12

Drill bit

Taper shank

adaptor

Front cap

Grip

Cotter

Rests

Taper shank adaptor

Fig. 13

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9. Using the side handle

When you wish to change a position of the side handle, turn grip of the side

handle counterclockwise to loosen it, and then fasten it firmly.

CAUTION:

When boring a hole, there can be a case where the machine attempts to rotate

by the reaction at the time of penetrating a concrete wall and/or when a tip of

the blade comes in contact with the rebar.

Firmly fasten the side handle and hold the machine with both of your hands.

Unless you hold it securely, an accident can occur.

HOW TO USE THE CORE BIT (FOR LIGHT LOAD)

When boring penetrating large hole use the core bit (for light load). At that time use

with the center pin and the core bit shank provided as optional accessories.

1. Mounting

CAUTION:

Be sure to turn power OFF and discon-

nect the plug from the receptacle.

(1) Mount the core bit to the core bit shank.

(Fig. 14)

Lubricate the thread of the core bit

shank to facilitate disassembly.

(2) Mount the core bit shank to the rotary

hammer. (Fig. 15)

(3) Insert the center pin into the guide plate

until it stops.

(4) Engage the guide plate with the core

bit, and turn the guide plate to left or

right so that it does not fall even if it

faces downward. (Fig. 16)

Fig. 15

Fig. 14

Core bit

Thread

Core bit shank

Fig. 16

Core bit

Core bit tip

Guide plate

Center pin

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2. How to bore (Fig. 17)

(1) Connect the plug to the power source.

(2) A spring is installed in the center pin.

Push it lightly to the wall or the floor

straight. Connect all over the surface

of the core bit tip and start operating.

(3) When boring about 3/16" (5 mm) in

depth the position of the hole will

establish. Bore after that removing the

center pin and the guide plate from core

bit.

(4) Application of excessive force will not only expedite the work, but will deteriorate

the tip edge of the drill bit, resulting in reduced service life of the rotary hammer.

CAUTION:

When removing the center pin and the guide plate, turn OFF the switch and

disconnect the plug form the receptacle.

3. Dismounting. (Fig. 18)

Remove the core bit shank from the

rotary hammer and strike the head of

the core bit shank strongly two or three

times with the manual hammer hold-

ing the core bit, then the thread be-

comes loose and the core bit can be

removed.

Fig. 17

Fig. 18

Core bit shank

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MAINTENANCE AND INSPECTION

WARNING: Be sure to switch power OFF and disconnect the plug from the

receptacle during maintenance and inspection.

1. Inspecting the drill bits

Since use of a dull tool will cause motor malfunctioning and degraded efficiency,

replace the drill bit with a new one or resharpening without delay when abrasion

is noted.

2. Inspecting the screws

Regularly inspect all screws and ensure that they are properly tightened. Should

any of the screws be loosened, retighten them immediately.

WARNING: Using this rotary hammer with loosen screws is extremely

dangerous.

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. 19)

The motor employs carbon brushes which are consumable parts. When they

become worn to or near “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 Nos. shown in the figure.

In addition, always keep carbon brushes clean and ensure that they slide freely

within the brush holders.

CAUTION: Using this rotary hammer with a carbon brush which is worn in

excess of the wear limit will damage the motor.

NOTE: Use HITACHI carbon brush No.73 indicated in Fig. 19.

Wear limit

No. of carbon brush

0.28" (7 mm)

0.67" (17 mm)

73

Fig. 19

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Replacing carbon brushes:

(For parts name, refer to Fig. 1)

Loosen the two set screws and remove the tail cover. Remove the brush caps

and carbon brushes. After replacing the carbon brushes, tighten the brush caps

securely and to install the tail cover with securely tightening two set screws.

5. How to replase grease

This machine is 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

You should look at the grease when you change the carbon brush. (See item 4 in

the section MAINTENANCE AND INSPECTION.) Ask for grease replacement at

the nearest HITACHI Authorized Service Center. Proceed for replacement of

grease.

Grease replenishment

CAUTION: Before replenishing the grease, turn the power off and pull out the

power plug.

(1) Disassemble the crank case cover and

thoroughly wipe off the old grease

inside. (Fig. 20)

(2) Supply 1.0 oz (30g) of Hitachi Electric

Hammer Grease A (standard accessory,

contained in tube) in the crank case.

(3) After replacing the grease, reassemble

the crank case cover securely. At this

time, do not damage or lose the oil seal.

NOTE: The HITACHI Electric Hammer

Grease A is of the lower

viscosity type. When the

supplied grease tube is

consumed, purchase from a

HITACHI Autorized Service

Center.

6. Service and repairs

All quality power tools will eventually require servicing or replacement of parts

because of wear from normal use. To assure that only authorized replacement

parts will be used, all service and repairs must be performed by a Hitachi

Authorized Service Center, ONLY.

Crank case cover

Fig. 20

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ACCESSORIES

WARNING: ALWAYS use Only authorized HITACHI replacement parts and

accessories. NEVER use replacement parts or accessories which

are not intended for use with this tool. Contact HITACHI if you

are not sure whether it is safe to use a particular replacement

part or accessory with your tool.

The use of any other attachment or accessory can be dangerous

and could cause injury or mechanical damage.

NOTE:

Accessories are subject to change without any obligation on the part of the HITACHI.

STANDARD ACCESSORIES

(1) Plastic Case (Code No. 325679) ..............................................................................1

(2) Side Handle (Code No. 313078) ..............................................................................1

(3) Stopper (Code No. 971786) .....................................................................................1

(4) Dust Cup (Code No. 971787) ...................................................................................1

(5) Syringe (Code No. 318085) .....................................................................................1

7. S ervice parts list

A: Item No.

B: Code No.

C: No. Used

D: Remarks

CAUTION: Repair, modification and inspection of Hitachi Power Tools must be

carried out by an 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.

MODIFICATIONS:

Hitachi Power Tools are constantly being improved and modified to incorporate

the latest technological advancements.

Accordingly, some parts (i.e. code numbers and/or design) may be changed

without prior notice.

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Taper mode Code No. Applicable drill bit

7/16" (11 mm)

1/2" (12.3 mm)

303617

1/2" (12.7 mm)

9/16" (14.3 mm)

9/16" (14.5 mm)

11/16" (17.5 mm)

303618 7/8" (21.5 mm)

A-taper 303619

B-taper 303620

External dia. Code No.

7/16"

944460

(11 mm)

1/2"

944461

(12.3 mm)

1/2"

993038

(12.7 mm)

9/16"

944462

(14.3 mm)

9/16"

944500

(14.5 mm)

11 / 16 "

944463

(17.5 mm)

7/8"

944464

(21.5 mm)

Morse taper

(No. 1)

Drill bit

(Taper

shank)

Taper shank adaptor formed A-

taper or B-taper is provided as an

optional accessory, but drill bit for

it is not provided.

Morse taper

(No. 2)

Drill bit

(Taper

shank)

Cotter (Code No. 944477)

(1) Drill Bit (Taper Shank) (2) Taper Shank Adaptor

(SDS-plus shank)

OPTIONAL ACCESSORIES ...........sold separately

1. Drilling anchor holes (Rotation + Hammering)

Drill Bit (Taper shank) and taper shank adaptor

Anchor size

W 1/4" W 5/16" W 3/8"

(6.3 mm) (8 mm) (9.5 mm)

Overall Length

10-1/4" 10-1/4" 6-1/4" 10-1/4"

(260 mm) (260 mm) (160 mm) (260 mm)

Code No. 302976 302975 303621 302974

Anchor Setter (for anchor setting)

(SDS-plus shank)

2. Knock-in anchor (Hammering only)

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Anchor setting adaptor

(for manual hammer)

<Outer wedge type with

the female screw>

Anchor size Code No.

W1/4"

971794

(6.3 mm)

W5/16"

971795

(8 mm)

W3/8"

971796

(9.5 mm)

W1/2"

971797

(12.7 mm)

W5/8"

971798

(15.9 mm)

<Inner wedge type with

the headless screw>

Anchor size Code No.

W1/4"

971799

(6.3 mm)

W5/16"

971800

(8 mm)

W3/8"

971801

(9.5 mm)

W1/2"

971802

(12.7 mm)

W5/8"

971803

(15.9 mm)

Anchor size

W 1/4" W 5/16" W 3/8"

(6.3 mm) (8 mm) (9.5 mm)

Overall Length

10-1/4" 10-1/4" 6-1/4" 10-1/4"

(260 mm) (260 mm) (160 mm) (260 mm)

Code No. 302979 302978 303622 302977

Core bit (outer diameter) Core bit shank

––

1"(25 mm) 982672 Overall length

1-1/8" (29 mm) 982673 4-1/8" 303625

(A) 1-1/4" (32 mm) 982674 (A) (105 mm)

(A) 982684 1-3/8" (35 mm) 982675 12"

303626

1-1/2" (38 mm) 982676 (300 mm)

1-3/4" (45 mm) 982677

2" (50 mm) 982678

12"

(B) 982685 (B) 2-9/16" (65 mm) 982679 (B)

(300 mm)

303627

3-5/32" (80 mm) 982680

3-17/32" (90 mm) 982681

Center

Code No. Code No. Code No.

3. Large hole boring (Rotation + Hammering)

Guide

Plate

Center pin Core Bit

Core bit Shank

(SDS-plus shank)

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