Hikoki DH 28PD Manuel utilisateur

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.

DH 28PD

Model Rotary Hammer

Modèle Marteau rotatif

Modelo Martillo perforador

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CONTENTS

English

Page

IMPORTANT SAFETY INSTRUCTIONS

... 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 ................................ 8

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 ............... 18

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

TABLE DES MATIERES

Français

Page

CONSIGNES DE SÉCURITÉ IMPORTANTES

... 23

SIGNIFICATION DES MOTS

D’AVERTISSEMENT ......................... 23

SECURITE ............................................. 23

AVERTISSEMENTS DE SÉCURITÉ GÉNÉRAUX

CONCERNANT LES OUTILS ÉLECTRIQUES ..

23

REGLES DE SECURITE SPECIFIQUES ET SYMBOLES

... 25

DOUBLE ISOLATION POUR UN

FONCTIONNEMENT PLUS SUR

........ 26

DESCRIPTION FONCTIONNELLE ........ 27

NOM DES PARTIES .......................... 27

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

Page

ASSEMBLAGE ET FONCTIONNEMENT ....

28

APPLICATIONS ................................. 28

AVANT L’UTILISATION .................... 28

UTILISATION ..................................... 30

COMMENT UTILISER LA COURONNE (POUR

UNE CHARGE LEGERE)

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

35

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

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

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

ACCESSOIRES SUR OPTION ........... 39

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

ÍNDICE

Español

Página

INSTRUCCIONES IMPORTANTES SOBRE SEGURIDAD

... 44

SIGNIFICADO DE LAS PALABRAS DE

SEÑALIZACIÓN ................................. 44

SEGURIDAD ......................................... 44

ADVERTENCIAS DE SEGURIDAD GENERAL

DE LA HERRAMIENTA ELÉCTRICA .............

44

NORMAS Y SÍMBOLOS ESPECÍFICOS DE SEGURIDAD

..... 46

AISLAMIENTO DOBLE PARA OFRECER UNA

OPERACIÓN MÁS SEGURA

................... 47

DESCRIPCIÓN FUNCIONAL ................ 48

NOMENCLATURA ............................. 48

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

Página

MONTAJE Y OPERACIÓN ................... 49

APLICACIONES ................................. 49

ANTES DE LA OPERACIÓN .............. 49

COMO SE USA .................................. 51

MODO DE USAR LA BARRENA TUBULAR

(PARA CARGAS LIGERAS)

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

MANTENIMIENTO E INSPECCIÓN ..... 58

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

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

ACCESORIOS OPCIONALES ............ 60

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

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IMPORTANT SAFETY INSTRUCTIONS

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.

ROTARY HAMMER SAFETY WARNINGS

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 movinkpparts.

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.

Don’t use tool for purpose not intended —for

example— don’t use circular saw for cutting tree

limbs or logs.

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English

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 yourself 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

no ............. 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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English

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

Drill bit

Fig. 1

Stopper

Front cap

Grip

Nameplate

Change lever

Push button

Switch

Handle

Housing

Tail cover

Brush cap

(inside the tail cover)

Set screw

(under the tail cover)

Side handle

Dust collecting

unit

Dust box

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APPLICATIONS

Rotation and hammering function

䡬

Drilling anchor holes

䡬

Drilling holes in concrete

䡬

Drilling holes in tile

Rotation only function

䡬

Drilling in steel or wood (with optional

accessories).

䡬

Tightening machine screws, wood screws (with

optional accessories).

Hammering only function

䡬

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 requirements

specified on the product nameplate.

2. Power switch

Ensure that the switch is in the OFF position. If the

plug is connected to a receptacle while the switch

is in the ON position, the power tool will start

operating immediately and can cause serious injury.

ASSEMBLY AND OPERATION

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 serious hazard.

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.

SPECIFICATIONS

Motor Single-Phase, Series Commutator Motor

Power Source Single-Phase, 120 V 60 Hz

Current 6.3 A

Capacity Concrete: 5/32" – 1-1/8" (4 mm – 28 mm)

Steel: 1/2" (13 mm)

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

No-Load Speed 0 – 1,050 / min.

Full-load Impact Rate 0 – 4,000 / min.

Weight 10.4 lbs (4.7 kg)

Dust collecting adapter

Max. hole-drilling depth: 3-11/32" (85 mm) (adjustment possible between 0 and 3-11/32" (85 mm))

Diameter of drill: 5/32" – 23/32" (4 – 18 mm)

Max. length of drill: 3-15/16" (100 mm)

(effective length)

Dust box capacity: 0.1 gallon (0.4 liters)

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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) Insert the drill bit in a twisting manner into the tool

holder until it latches itself. (Fig. 2)

(3) Check the latching by pulling on the drill bit.

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

direction of the arrow and pull out the drill bit. (Fig.

3)

7. Installation of dust cup or dust collector (B)

(Optional accessories) (Fig. 4, Fig. 5)

When using a rotary hammer for upward drilling

operations attach a dust cup or dust collector (B) to

collect dust or particles for easy operation.

䡬

Installing the dust cup

Use the dust cup by attaching to the drill bit a shown

in Fig. 4.

When using a bit which has big diameter, enlarge

the center hole of the dust cup with this rotary

hammer.

Dust cup

Drill bit

Part of SDS-plus shank

Grip

Front cap

Fig. 2

Fig. 3

Grip

Fig. 4

䡬

Installing dust collector (B)

When using dust collector (B), insert dust collector

(B) from the tip of the bit by aligning it to the groove

on the grip (Fig. 5)

CAUTION:

䢇

The dust cup and dust collector (B) are for exclusive

use of concrete drilling work. Do not use them for

wood or metal drilling work.

䢇

Insert dust collector (B) completely into the chuck

part of the main unit.

䢇

When turning the rotary hammer on while dust

collector (B) is detached from a concrete surface,

dust collector (B) will rotate together with the drill

bit. Make sure to turn on the switch after pressing

dust cup on the concrete surface. (When using dust

collector (B) attached to a drill bit that has more

than 7-15/32" (190 mm) of overall length, dust

collector (B) cannot touch the concrete surface and

will rotate. Therefore please use dust collector (B)

by attaching to drill bits which have 6-17/32" (166

mm), 6-19/64" (160 mm) and 4-21/64" (110 mm)

overall length.

䢇

Dump particles after every two or three holes when

drilling.

䢇

Please replace the drill bit after removing dust

collector (B).

8. Selecting the driver bit

Screw heads or bits will be damaged unless a bit

appropriate for the screw diameter is employed to

drive in the screws.

9. Confirm the direction of bit rotation (Fig. 6)

The bit rotates clockwise (viewed from the rear side)

by pushing the R-side of the push button. The

L-side of the push button is pushed to turn the bit

counterclockwise.

Dust collector (B)

Fig. 5

Fig. 6

Push button

R

L

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10. 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:

䢇

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.

䢇

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.

䢇

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 pits 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. To turn the switch OFF, release the

trigger switch to its original position.

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. 7)

Turn the grip slightly and confirm that the clutch

has been engaged with a click.

(1) Mount the drill bit.

(2) Pull the trigger switch after applying the drill bit tip

to the drilling position (Fig. 8)

(3) Pushing the rotary hammer forcibly is not necessary

at all. Pushing slightly so that drill dust comes out

gradually is just sufficient.

3. Using the dust-collecting unit

Using the rotary hammer with the dust-collecting

unit attached creates a more hygienic working

environment free of flying dust (Fig. 9).

(1) Attaching the dust-collecting unit

Insert the dust-collecting unit along the rail on the

rotary hammer. When it is inserted as far as it will

go, fix it to the rotary hammer with the two latches

(Fig. 10).

CAUTION:

The dust-collecting unit is designed for use when

drilling concrete. Do not use for drilling holes in

metal or wood.

Fig. 7

Fig. 8

Fig. 10

Fig. 9

Push button

Change lever

Nozzle

Ajuster

Drill bit

Dust box

Dust-collecting

unit

Latch

Rail

Latch

Dust-collecting

unit

01Eng_DH28PD_US 10/2/09, 15:3210

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(2) Adjusting the dust-collecting unit

(a) Adjusting the position of the dust-collecting

nozzle

Push the nozzle in and adjust to the desired

position. Pull the adjuster on the nozzle in the

direction of the arrow to release the lock and

move until it contacts with the adjuster rod.

Push the adjuster in the opposite direction to

the arrow to lock (Fig. 11).

(b) Setting the hole-drilling depth

Pull the adjuster on the handle in the direction

of the arrow to release the lock, move to the

desired position to determine the stroke, and

push the adjuster in the opposite direction to

the arrow to lock.

The nozzle travel distance when the tip of the

nozzle matches the tip of the drill bit is the hole-

drilling depth (Fig. 12).

䡬

The maximum hole-drilling depth when using

the dust-collecting unit is 85 mm.

䡬

When using the dust-collecting unit, it is

possible to use HITACHI drill bits between

5/32" (4 mm) and 23/32" (18 mm) in diameter

and up to 3-15/16" (100 mm) in effective length.

(3) Drilling holes

When drilling holes, hold the rotary hammer so that

the tip of the nozzle contacts with the concrete

surface. Dust-collecting effectiveness is reduced if

the unit is not in contact with the surface (Fig. 13).

(4) Removing dust

Excessive dust in the dust box will reduce dust-

collecting effectiveness. Empty the dust box

regularly.

Push the lever to remove the dust box from the dust-

collecting unit, and empty and clean the box (Fig.

14).

Dust-collecting effectiveness is reduced if the filter

in the dust box becomes blocked.

Use the table below as a guide to replacement of

the dust box.

Fig. 11

Fig. 12

Fig. 13

Fig. 14

Dust box capacity Drill diameter of 6 mm / depth of 28 mm: 130 holes

Drill diameter of 8 mm / depth of 30 mm: 75 holes

Drill diameter of 12 mm / depth of 50 mm: 20 holes

Guide to replacement of dust box

Dust box has been filled and emptied 100 times

Arrow

Ajuster

rod

Nozzle

Ajuster

Nozzle

Ajuster rod

Ajuster

Arrow

Lever

Dust box

Dus-collecting

unit

01Eng_DH28PD_US 10/2/09, 15:3211

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(5) Replacing the rubber cap

Wear of the rubber cap will reduce dust-collecting

effectiveness.

Replace the rubber cap when it becomes worn.

How to replace the rubber cap (Fig. 15)

(1) Remove the nozzle seal from the nozzle.

(2) Replace the rubber cap with a new cap.

Fit the rubber cap making sure that it is correctly

oriented.

(3) Attach the nozzle seal.

Insert the lip of the nozzle seal securely into the

groove of the nozzle.

At this time, make sure that the groove between

the nozzle and the nozzle seal is uniform all the way

round.

4. When not using the dust-collecting unit

When using the rotary hammer without the dust-

collecting unit, attach the provided cover in the unit

attachment hole (Fig. 16).

CAUTION:

If no cover is attached, dust or other particles may

be sucked up from the hole, causing damage to

the motor.

5. Rotation only

NOTE:

The dust-collecting unit cannot be used. Remove

the unit and insert the provided cap in the unit

attachment hole.

CAUTION:

If no cover is attached, dust or other particles may

be sucked up from the hole, causing damage to

the motor.

This rotary hammer can be set to rotation only

mode by pressing the push button and turning the

change lever to mark. (Fig. 17)

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. 18):

(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:

䢇

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.

䢇

Drill bit may snap off while withdrawing the rotary

hammer from the drilled hole. For withdrawing, it

is important to use a pushing motion.

䢇

Do not attempt to drill anchor holes or holes in

concrete with the main unit in the rotation only

function.

Fig. 16

Fig. 17

Fig. 18

Fig. 15

Lip

Groore

Nozzle

Nozzle seal

Rubber cap

Groore between nozzle

and nozzle seal

Cover

Attachment

hole

Change lever

Push button

Front

cap

Chuck

adaptor

Grip

Part of SDS-plus

shank

Drill

chuck

01Eng_DH28PD_US 10/2/09, 15:3212

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䢇

Do not attempt to use the rotary hammer in the

rotation and hammering function with the drill

chuck and chuck adapter attached. This would

seriously shorten the service life of every

components of the machine.

6. When driving machine screws (Fig. 19)

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:

䢇

Exercise care not to excessively prolong driving

time, otherwise, the screws may be damaged by

excessive force.

䢇

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.

䢇

Do not attempt to use the rotary hammer in the

rotation and hammering function with the chuck

adapter (D) and bit attached.

7. When driving wood screws (Fig. 19)

(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

䡬

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.

䡬

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.

8. Hammering only

NOTE:

The dust-collecting unit cannot be used. Remove

the unit and insert the provided cap in the unit

attachment hole.

CAUTION:

䢇

If no cover is attached, dust or other particles may

be sucked up from the hole, causing damage to

the motor.

This rotary hammer can be set to hammering only

mode by pressing the push button and turning the

change lever to mark. (Fig. 20)

(1) Mount the bull point or cold chisel.

(2) Press the push button and set the change lever to

mark. (Fig. 21)

The rotation is released, turn the tool and adjust

the tool to desired position. (Fig. 22)

Fig. 19

Fig. 20

Fig. 21

Bit

Socket

Chuck adaptor (D)

Front cap

Grip

Fig. 22

Push button

Change lever

Push button

01Eng_DH28PD_US 10/2/09, 15:3213

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(3) Turn the change lever to mark. (Fig. 20)

Then bull point or cold chisel is locked.

9 . Using the stopper (Fig. 23)

(1) Loosen the wing bolt and insert the stopper into

the mounting hole on the side handle.

(2) Adjust the stopper position according to the depth

of the hole and tighten the wing bolt securely.

10. How to use the drill bit (taper shank) and the taper

shank adaptor.

(1) Mount the taper shank adaptor to the rotary

hammer. (Fig. 24)

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

adaptor. (Fig. 24)

(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. 25)

Fig. 24

Fig. 23

11. 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 disconnect the plug

from the receptacle.

(1) Mount the core bit to the core bit shank. (Fig. 26)

Lubricate the thread of the core bit shank to facilitate

disassembly.

Stopper

Wing bolt

Side handle

Mounting hole

Drill bit

Taper shank

adaptor

Front cap

Grip

Cotter

Rests

Taper shank adaptor

Fig. 25

01Eng_DH28PD_US 10/2/09, 15:3214

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English

(2) Mount the core bit shank to the rotary hammer. (Fig.

27)

(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. 28)

2. How to bore (Fig. 29)

(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.

Fig. 26

Core bit

Thread

Core bit shank

Fig. 27

CAUTION:

When removing the center pin and the guide plate,

turn OFF the switch and disconnect the plug form

the receptacle.

3. Dismounting. (Fig. 30)

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 hammer

holding the core bit, then the thread becomes loose

and the core bit can be removed.

Fig. 28

Fig. 29

Core bit

Core bit tip

Guide plate

Center pin

Core bit shank

Fig. 30

01Eng_DH28PD_US 10/2/09, 15:3215

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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. 31)

The motor employs carbon brushes which are

consumable parts. When they become worn to or

near “wear limit”, it could result in motor trouble.

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.04 indicated in

Fig. 31.

䡬

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.

䡬

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.

䡬

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. 32)

(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.

Wear limit

No. of carbon brush

0.24" (6 mm)

0.67" (17 mm)

04

Fig. 31

01Eng_DH28PD_US 5/28/10, 2:57 PM16

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English

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.

7. Service 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 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.

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.

Crank cover

Fig. 32

01Eng_DH28PD_US 10/2/09, 15:3217

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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. 330220) ............................................................................................................... 1

(2) Side Handle (Code No. 330208) .............................................................................................................. 1

(3) Stopper (Code No. 982671) ..................................................................................................................... 1

(4) Cover (Code No. 331730) ......................................................................................................................... 1

(5) Rubber cap (replacement) (Code No. 331731) ...................................................................................... 1

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

1. Drilling anchor holes (Rotation + Hammering)

Cotter (Code No. 944477)

䡬

Drill Bit (Taper shank) and taper shank adaptor

(1) Drill Bit (Taper Shank)

(2) Taper Shank Adaptor

(SDS-plus shank)

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)

01Eng_DH28PD_US 10/2/09, 15:3218

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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 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

Anchor Setter (for anchor setting)

(SDS-plus shank)

2. Knock-in anchor (Hammering only)

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)

01Eng_DH28PD_US 10/2/09, 15:3219

20

English

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

(B) 982685 (B)

2" (50 mm) 982678

(B)

12"

303627

2-9/16" (65 mm) 982679 (300 mm)

3-5/32" (80 mm) 982680

Center

Code No. Code No. Code No.

Guide plate

Core bit

(outer diameter)

1-1/4" (32 mm)

1-3/8" (35 mm)

1-1/2" (38 mm)

Core bit

(outer diameter)

1-3/4" (45 mm)

2" (50 mm)

2-9/16" (65 mm)

3-5/32" (80 mm)

Code No.

982686

982687

982688

Code No.

982689

982690

982691

982692

3. Large hole boring (Rotation + Hammering)

Guide

Plate

Center pin Core Bit

Core bit Shank

(SDS-plus shank)

4. Demolishing operation (Hammering only)

Bull point (Round type) (SDS-plus shank)

Code No. 303046

Bull point (Square type) (SDS-plus shank)

Code No. 316656

01Eng_DH28PD_US 10/2/09, 15:3220

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