Hitachi DH 24DV User Manual

English

IMPORTANT SAFETY INFORMATION ................. 3

MEANINGS OF SIGNAL WORDS......................... 3

SAFETY ...................................................................... 4

GENERAL SAFETY RULES – FOR ALL

BATTERY OPERATED TOOLS ....................... 4

SPECIFIC SAFETY RULES AND SYMBOLS ......... 6

IMPORTANT SAFETY INSTRUCTIONS FOR

USE OF THE CORDLESS ROTARY

HAMMER ........................................................ 8

IMPORTANT SAFETY INSTRUCTIONS

FOR BATTERY CHARGER .............................. 8

IMPORTANT SAFETY INSTRUCTIONS

FOR USE OF THE BATTERY AND

BATTERY CHARGER ...................................... 9

FUNCTIONAL DESCRIPTION .................................. 11

MODEL ................................................................. 11

CONTENTS

Page

NAME OF PARTS ................................................ 11

SPECIFICATIONS ................................................ 13

ASSEMBLY AND OPERATION ............................... 14

APPLICATIONS.................................................... 14

REMOVAL AND INSTALLATION METHOD

OF BATTERY .................................................... 14

CHARGING METHOD.......................................... 14

BEFORE USE ....................................................... 17

PRIOR TO OPERATION ....................................... 17

HOW TO USE ...................................................... 19

MAINTENANCE AND INSPECTION ....................... 23

ACCESSORIES ......................................................... 25

STANDARD ACCESSORIES ............................... 25

OPTIONAL ACCESSORIES ................................. 25

PARTS LIST .............................................................. 84

Page

Français

INFORMATIONS IMPORTANTES DE SÉCURITÉ SIGNIFICATION DES MOTS D’AVERTISSEMEN

SECURITE ................................................................ 31

REGLES GENERALE DE SECURITE – POUR TOUS

LES OUTILS FONCTIONNANT SUR BATTERIE ...

REGLES DE SECURITE SPECIFIQUES ET SYMBOLES .........

CONSIGNES DE SÉCURITÉ IMPORTANTES

POUR L'UTILISATION DU MARTEAU

PERFORATEUR À BATTERIE ...................... 35

CONSIGNES DE SÉCURITÉ IMPORTANTES

POUR LE CHARGEUR DE BATTERIE .......... 35

CONSIGNES DE SÉCURITÉ IMPORTANTES POUR L’UTILISATION

DE LA BATTERIE ET DU CHARGEUR DE BATTERIE ...

DESCRIPTION FONCTIONNELLE ........................... 38

MODELE ............................................................... 38

Español

INFORMACIÓN IMPORTANTE SOBRE SEGURIDAD......

SIGNIFICADO DE LAS PALABRAS DE SEÑALIZACIÓN

SEGURIDAD ............................................................. 58

NORMAS GENERALES DE SEGURIDAD – PARA TODAS

LAS HERRAMIENTAS ALIMENTADAS CON BATERÍA NORMAS Y SÍMBOLOS ESPECÍFICOS DE SEGURIDAD INSTRUCCIONES IMPORTANTES PARA

LA UTILIZACIÓN DEL TALADRO DE

PERCUSIÓN SIN CABLE .............................. 62

INSTRUCCIONES IMPORTANTES DE SEGURIDAD

PARA EL CARGADOR DE BATERÍAS INSTRUCCIONES IMPORTANTES DE SEGURIDAD

PARA LA BATERÍA Y EL CARGADOR DE BATERÍAS

DESCRIPCIÓN FUNCIONAL .................................... 65

MODELO .............................................................. 65

TABLE DES MATIERES

Page

......... 30

T .... 30

31 33

ÍNDICE

Página

..... 57

... 58

.... 60

................. 62

... 64

NOM DES PARTIES ............................................. 38

SPECIFICATIONS ................................................ 40

ASSEMBLAGE ET FONCTIONNEMENT ..........................

UTILISATIONS ..................................................... 41

MÉTHODE DE RETRAIT ET D’INSTALLATION

DE LA BATTERIE .......................................... 41

MÉTHODE DE RECHARGE ................................. 41

AVANT L’UTILISATION ...................................... 44

AVANT LA MISE EN MARCHE ........................... 44

UTILISATION ....................................................... 47

ENTRETIEN ET INSPECTION .................................. 50

ACCESSOIRES ......................................................... 52

ACCESSOIRES STANDARD ............................... 52

ACCESSOIRES EN OPTION ................................ 52

LISTE DES PIECES ................................................... 84

NOMENCLATURA ............................................... 65

ESPECIFICACIONES ............................................ 66

MONTAJE Y OPERACIÓN ....................................... 67

APLICACIONES ................................................... 67

MÉTODO DE EXTRACCIÓN E INSTALACIÓN

DE LA BATERÍA ............................................ 67

MÉTODO DE CARGA .......................................... 67

ANTES DE LA UTILIZACIÓN .............................. 70

ANTES DE LA OPERACIÓN ................................ 70

COMO SE USA .................................................... 72

MANTENIMIENTO E INSPECCIÓN ........................ 76

ACCESORIOS ........................................................... 78

ACCESORIOS ESTÁNDAR .................................. 78

ACCESORIOS OPCIONALES .............................. 79

LISTA DE PIEZAS .................................................... 84

Page

Página

English

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.

English

SAFETY

GENERAL SAFETY RULES – FOR ALL BATTERY OPERATED TOOLS

WARNING: Read and understand all instructions.

Failure to follow all instructions listed below, may result in electric shock, fire and/or serious personal injury.

SAVE THESE INSTRUCTIONS

1. Work Area (1) Keep your work area clean and well lit. Cluttered benches and dark areas invite

accidents.

(2) 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 of fumes.

(3) Keep bystanders, children, and visitors away while operating a power tool.

Distractions can cause you to lose control.

2. Electrical Safety (1) A battery operated tool with integral batteries or a separate battery pack must be

recharged only with the specified charger for the battery.

A charger that may be suitable for one type of battery may create a risk of fire when used with another battery.

(2) Use battery operated tool only with specifically designed battery pack.

Use of any other batteries may create a risk of fire.

3. Personal Safety (1) Stay alert, watch what you are doing and use common sense when operating a

power tool. Do not use tool while tired or under the influence of drugs, alcohol, or medication. A moment of inattention while operating power tools may result in

serious personal injury.

(2) Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep

your hair, clothing and gloves away from moving parts. Loose clothes, jewelry, or

long hair can be caught in moving parts.

(3) Avoid accidental starting. Be sure switch is off position before inserting battery.

Carrying tools with your finger on the switch or inserting the battery pack into a tool with the switch on invites accidents.

(4) Remove adjusting keys or wrenches before turning the tool on. A wrench or a key

that is left attached to a rotating part of the tool may result in personal injury.

(5) Do not overreach. Keep proper footing and balance at all times. Proper footing and

balance enable better control of the tool in unexpected situations.

(6) Use safety equipment. Always wear eye protection. Dust mask, non-skid safety

shoes, hard hat, or hearing protection must be used for appropriate conditions.

English

4. Tool Use and Care (1) Use clamps or other practical way to secure and support the workpiece to a stable

platform. Holding the work by hand or against your body is unstable and may lead

to loss of control.

(2) Do not force tool. Use the correct tool for your application. The correct tool will do

the job better and safer at the rate for which it is designed.

(3) Do not use tool if switch does not turn it on or off. Any tool that cannot be controlled

with the switch is dangerous and must be repaired.

(4) Disconnect battery pack from tool or place the switch in the locked or off position

before making any adjustments, changing accessories, or storing the tools. Such

preventive safety measures reduce the risk of starting the tool accidentally.

(5) Store idle tools out of reach of children and other untrained persons. Tools are

dangerous in the hands of untrained users.

(6) When battery pack is not in use, keep it away from other metal objects like: paper

clips, coins, keys, nails, screws, or other small metal objects that can make a connection from one terminal to another.

Shorting the battery terminals together may cause sparks, burns, or a fire.

(7) Maintain tools with care. Keep cutting tools sharp and clean. Properly maintained

tools, with sharp cutting edges are less likely to bind and are easier to control.

(8) Check for misalignment or binding of moving parts, breakage of parts, and any

other condition that may affect the tools operation. If damaged, have the tool serviced before using. Many accidents are caused by poorly maintained tools.

(9) Use only accessories that are recommended by the manufacturer for your model.

Accessories that may be suitable for one tool, may become hazardous when used on another tool.

5. Service (1) Tool service must be performed only by qualified repair personnel. Service or

maintenance performed by unqualified personnel could result in a risk of injury.

(2) When servicing a tool, use only identical replacement parts. Follow instructions in

the Maintenance section of this manual. Use of unauthorized parts or failure to

follow Maintenance Instruction may create a risk of electric shock or injury.

WARNING:

Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:

● Lead from lead-based paints,

● Crystalline silica from bricks and cement and other masonry products, and

● Arsenic and chromium from chemically-treated lumber.

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.

English

SPECIFIC SAFETY RULES AND SYMBOLS

1. Hold tools by insulated gripping surfaces when performing an operation where the cutting tool may contact hidden wiring. Contact with a “live” wire will make exposed

metal parts of the tool “live” and shock the operator.

2. ALWAYS wear ear plugs when using the tool for extended periods.

Prolonged exposure to high intensity noise can cause hearing loss.

3. Never touch moving parts.

Never place your hands, fingers or other body parts near the tool’s moving parts.

4. 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.

5. 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.

6. 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.

7. 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.

8. Definitions for symbols used on this tool

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

.............. direct current

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

---/min ...... revolutions or reciprocation per minute

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

Keep all screws, bolts, and plates tightly mounted. Check their condition periodically.

10. 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.

11. 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.

English

12. 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.

13. Carefully handle power tools.

Should a power tool be dropped or struck against hard materials inadvertently, it may be deformed, cracked, or damaged.

14. 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.

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. ALWAYS wear eye protection that meets the requirement of the latest revision of ANSI

Standard Z87.1.

English

IMPORTANT SAFETY INSTRUCTIONS FOR USE OF THE CORDLESS ROTARY HAMMER

WARNING: Death or serious bodily injury could result from improper or unsafe use

of the cordless rotary hammer. To avoid these risks, follow these basic safety instructions:

1. NEVER touch the tool bit with bare hands after operation.

2. NEVER wear gloves made of stuff liable to roll up such as cotton, wool cloth or string, etc.

3. ALWAYS attach the side handle and securely grip the Cordless Rotary Hammer.

4. ALWAYS be careful with buried object such as an underground, wiring. Touching these active wiring or electric cable with this tool, you may receive an electric shock. Comfirm if there are any buried object such as electric cable within the wall, floor or ceiling where you are going to operate here after.

IMPORTANT SAFETY INSTRUCTIONS FOR BATTERY CHARGER

1. This manual contains important safety and operating instructions for battery charger Model UC24YFB.

2. Before using battery charger, read all instructions and cautionary markings on (1) battery charger, (2) battery, and (3) product using battery.

3. To reduce risk of injury, charge HITACHI rechargeable battery type EB2420. Other type of batteries may burst causing personal injury and damage.

4. Do not expose battery charger to rain or snow.

5. Use of an attachment not recommended or sold by the battery charger manufacturer may result in a risk of fire, electric shock, or injury to persons.

6. To reduce risk of damage to electric plug and cord, pull by plug when disconnecting battery charger.

7. Make sure cord is located so that it will not be stepped on, tripped over, or otherwise subjected to damage or stress.

8. An extension cord should not be used unless absolutely necessary. Use of improper extension cord could result in a risk of fire and electric shock. If extension cord must be used make sure: a. That blades of extension cord are the same number, size, and shape as those of

plug on battery charger; b. That extension cord is properly wired and in good electrical condition; and c. That wire size is large enough for AC ampere rating of battery charger as specified

in Table 1.

English

Table 1

RECOMMENDED MINIMUM AWG SIZE FOR

EXTENSION CORDS FOR BATTERY CHARGERS

AC Input Rating Amperes* AWG Size of Cord

Equal to or but less Length of Cord, Feet (Meter)

greater than than 25 (7.5) 50 (15) 100 (30) 150 (45)

0 2 18 18 18 16 2 3 18 18 16 14 3 4 18 18 16 14

* If the input rating of a battery charger is given in watts rather than in amperes, the

corresponding ampere rating is to be determined by dividing the wattage rating by the voltage rating-for example:

1250 watts 125 volts

9. Do not operate battery charger with damaged cord or plug-replace them immediately.

10. Do not operate battery charger if it has received a sharp blow, been dropped, or otherwise damaged in any way; take it to a qualified serviceman.

11. Do not disassemble battery charger; take it to a qualified serviceman when service or repair is required. Incorrect reassembly may result in a risk of electric shock or fire.

12. To reduce risk of electric shock, unplug charger from receptacle before attempting any maintenance or cleaning. Removing the battery will not reduce this risk.

13. This battery charger might be attached to HITACHI battery operated tools as a standard accessory. In this case, please confirm Instruction Manual of the HITACHI battery operated tools before using the battery charger.

= 10 amperes

IMPORTANT SAFETY INSTRUCTIONS FOR USE OF THE BATTERY AND BATTERY CHARGER

You must charge the battery before you can use the cordless rotary hammer. Before using the model UC24YFB battery charger, be sure to read all instructions and cautionary statements on it, the battery and in this manual. REMEMBER: USE ONLY HITACHI BATTERY TYPE EB2420. OTHER TYPES OF BATTERIES MAY BURST AND CAUSE INJURY!

Follow these instructions to avoid the risk of injury:

WARNING: Improper use of the battery or battery charger can lead to serious injury.

To avoid these injuries:

1. NEVER disassemble the battery.

2. NEVER incinerate the battery, even if it is damaged or is completely worn out. The

battery can explode in a fire.

English

3. NEVER short-circuit the battery.

4. NEVER insert any objects into the battery charger’s air vents. Electric shock or

damage to the battery charger may result.

5. NEVER charge outdoors. Keep the battery away from direct sunlight and use only

where there is low humidity and good ventilation.

6. NEVER charge when the temperature is below 32°F (0°C) or above 104°F (40°C).

7. NEVER connect two battery chargers together.

8. NEVER insert foreign objects into the hole for the battery or the battery charger.

9. NEVER use a booster transformer when charging.

10. NEVER use an engine generator or DC power to charge.

11. NEVER store the battery or battery charger in places where the temperature may

reach or exceed 104°F (40°C).

12. ALWAYS operate charger on standard household electrical power (120 volts). Using

the charger on any other voltage may overheat and damage the charger.

13. ALWAYS wait at least 15 minutes between charges to avoid overheating the charger.

14. ALWAYS disconnect the power cord from its receptacle when the charger is not in

use.

SAVE THESE INSTRUCTIONS

AND

MAKE THEM AVAILABLE TO

OTHER USERS OF THIS TOOL!

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.

MODEL

DH24DV (BFK): with charger (UC24YFB) and case DH24DV (2BFK): with charger (UC24YFB), case and extra battery

NAME OF PARTS

1. Cordless Rotary Hammer (DH24DV)

Depth gauge

Grip Change lever

Front cap

Side handle

Push button

Switch trigger

Shift knob

Batery

English

䡬 Battery (EB2420)

Latch

Nameplate

2. Battery Charger (UC24YFB)

Pilot Lamp

Caution Plate

Terminal Hole

Fig. 1

Guide Rail

Nameplate

Fig. 2

SPECIFICATIONS

1. Cordless Rotary Hammer (DH24DV)

Motor DC motor

No-load speed SAVE/POWER 0–500/min. / 0–1000/min.

Full-load impact rate SAVE/POWER 0–2200/min. / 0–4500/min.

Concrete 15/16″ (24 mm)

Capacity Drilling Steel 1/2″ (13 mm)

Wood 1–3/16″ (30 mm) *

English

Battery (EB2420)

Weight 8.9 lbs. (4.0 kg)

* Do not use the “SAVE” mode when boring holes with the wood drill. There is a likelihood

that the motor will burn out.

Nickel cadmium battery

Voltage ........ DC 24 V

2. Battery Charger (UC24YFB)

Input power source Single phase: AC 120 V 60 Hz

Charging time Approx. 50 min. (At a temperature of 68°F (20°C))

Charger

Weight 1.3 lbs. (0.6 kg)

Charging voltage .......................... DC 24 V

Charging current........................... DC 2.5 A

English

ASSEMBLY AND OPERATION

APPLICATIONS

Rotation and striking function

䡬 Drilling anchor holes 䡬 Drilling holes in concrete 䡬 Drilling holes in tile

Rotation only function

䡬 Drilling in steel or wood 䡬 Tightening machine screws, wood screws

REMOVAL AND INSTALLATION METHOD OF BATTERY

1. Battery removal

Hold the handle tightly and push the battery latches to remove the battery (See Figs. 3 and 4).

2. Battery installation

Insert the battery aligning both guide rail of battery and body. Make sure the battery is fixed firmly. (See Fig. 4)

Latch

Guide Rail of Battery

Battery

Pull Out

Fig. 3 Fig. 4

Insert

Housing

Guide Rail of Housing

CHARGING METHOD

NOTE: Before plugging into the receptacle, make sure the following points.

䡬 The power source voltage is stated on the nameplate. 䡬 The cord is not damaged.

WARNING: Do not charge at voltage higher than indicated on the nameplate.

If charged at voltage higher than indicated on the nameplate, the charger will burn up.

1. Insert the plug of battery charger into the receptacle.

When the plug of battery charger has been inserted into the receptacle, pilot lamp will blink in red. (At 1-second intervals)

English

WARNING:

Do not use the electrical cord if damaged. Have it repaired immediately.

2. Insert the battery to the battery charger.

Insert the battery into the battery charger as shown in Fig. 5. Make sure the battery is fully seated in the battery charger.

Before insert After insert

Fig. 5

3. Charging

䡬 When the battery is connected to the battery charger, charging will commence and the

pilot lamp will light in red. (See Table 2)

NOTE: If the pilot lamp flikers in red, pull out the plug from the receptacle and check if

the battery is properly mounted.

䡬 When the battery is fully charged, the pilot lamp will blink in red slowly. (At 1-second

intervals) (See Table 2)

Table 2

Indications of the pilot lamp

Before charging

While charging

Charging complete

Charging impossible

Blinks (RED)

Lights (RED)

Blinks (RED)

Flickers (RED)

Lights (GREEN)

Lights for 0.5 seconds. Does not light for

0.5 seconds. (off for 0.5 seconds)

Lights continuously

Lights for 0.5 seconds. Does not light for

0.5 seconds. (off for 0.5 seconds)

Lights for 0.1 seconds. Does not light for

0.1 seconds. (off for 0.1 seconds)

Lights continuously

Malfunction in the battery or the charger

The battery temperature is high, making recharging impossible.

English

䡬 Regarding the temperature of the rechargeable battery

The temperatures for rechargeable batteries are as shown in the table below, and batteries that have become hot should be cooled for a while before being recharged.

Table 3

Rechargeable batteries

EB2420

䡬 Regarding recharging time

Table 4 shows the recharging time required according to the type of battery.

Table 4 Recharging time (approx. min.) at 68°F (20°C)

Battery Voltage (V)

24 V EB2420 50 min.

NOTE: The recharging time may vary according to ambient temperature and power

source voltage.

Temperatures at which the battery can be recharged

23°F — 140°F (–5°C — 60°C)

Battery capacity (Ah)

2.0 Ah

4. Disconnect battery charger from the receptacle.

CAUTION:

Do not pull the plug out of the receptacle by pulling on the cord. Make sure to grasp the plug when removing from receptacle to avoid damaging cord.

5. Remove the battery from the battery charger.

Supporting the battery charger with hand, pull out the battery from the battery charger.

CAUTION:

● When the battery charger has been continuosly used, the battery charger will heated, thus constituting the cause of the failures. Once the charging has been completed, give 15 minutes rest until the next charging.

● If the battery is rechraged when it is warm due to battery use or exposure to sunlight, the pilot lamp may light in green. The battery will not be recharged. In such a case, let the battery cool before charging.

Regarding electric discharge in case of new batteries, etc.

As the internal chemical substance of new batteries and batteries that have not been used for an extended period is not activated, the electric discharge might be low when using them the first and second time. This is a temporary phenomenon, and normal time required for recharging will be restored by recharging the batteries 2 – 3 times.

English

How to make the batteries perform longer

(1) Recharge the batteries before they become completely exhausted.

When you feel that the power of the tool becomes weaker, stop using the tool and recharge its battery. If you continue to use the tool and exhaust the electric current, the battery may be damaged and its life will become shorter.

(2) Avoid recharging at high temperatures.

A rechargeable battery will be hot immediately after use. If such a battery is recharged immediately after use, its internal chemical substance will deteriorate, and the battery life will be shortened. Leave the battery and recharge it after it has cooled for a while.

BEFORE USE

Check the work area to make sure that it is clear of debris and clutter. Clear the area of unnecessary personnel. Ensure that lighting and ventilation is adequate.

PRIOR TO OPERATION

1. Confirming condition of the environment

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

2. Attaching the side handle (Fig. 6)

(1) Turn the grip of the side handle to loosen it and

push it in until it comes in contact with the housing.

(2) Adjust the side handle to the angle that allows

the easiest use, then turn the side handle’s grip firmly to lock it place.

3. Mounting the drill bit (Fig. 7)

(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. 7)

(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. 8)

4. Installation of dust cup or dust collector (B) (Optional accessories) (Fig. 9, Fig. 10)

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. 9. When using a bit which has big diameter, enlarge the center hole of the dust cup with this rotary hammer.

Side handle

Loosen

Drill bit

Part of SDS-plus shank

Fig. 6

Front cap

Fig. 7

Housing

Tighten

Grip

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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. 10)

CAUTION:

● 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.

● Insert dust collector (B) completely into the chuck

part of the main unit.

● 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.

● Dump particles after every two or three holes

when drilling.

● Please replace the drill bit after removing dust

collector (B).

Drill bit

5. 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.

Part of SDS-plus shank

Fig. 8

Dust Cup

Fig. 9

Dust collector (B)

Fig. 10

Grip

6. Confirm the direction of bit rotation (Fig. 11)

The bit rotates clockwise (viewed from the rear side) by pushing the R-side of the push button. (Fig. 11-a) The L-side of the push button is pushed to turn the bit counterclockwise. (Fig. 11-b) The motor does not rotate if the push button is set to the center position. (Fig. 11-c)

English

Push Push button

indication

(a) Forward rotation

Push

the

side

indication

(b) Reverse rotation

Fig. 11 Diagram seen from the handle side

HOW TO USE

1. Switch operation

䡬 When the switch trigger is depressed, the tool

rotates. When the switch trigger is released, the tool stops.

䡬 The rotational speed of the rotary hammer can be

controlled by varying the amount that the switch trigger is pulled. Speed is low when the switch trigger is pulled slightly and increases as the switch trigger is pulled more.

䡬 When releasing the switch trigger, the brake will

be applied for immediate stopping.

2. Rotation + Striking

Align the “ ” mark with the “ ” mark by rotating the change lever to set the “Rotation + Striking”

mode. (Fig. 12) (1) Mount the drill bit. (2) Pull the trigger switch after applying the drill bit

tip to the drilling position. (Fig. 13) (3) Pushing the rotary hammer forcibly is not

necessary at all. Pushing slightly so that drill dust

comes out gradually is just sufficient.

Push button

“ ” mark

Change lever

Push button

Fig. 12

Fig. 13

Center position

“ ” mark

“ mark

”

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. 13.

English

3. Rotation only

Align the “ ” mark with the “ ” mark by rotating

the change lever to set the “Rotation only” mode.

(Fig. 12)

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. 14): (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 mode.

● Do not attempt to use the rotary hammer in the rotation and striking mode with the

drill chuck and chuck adaptor attached. This would seriously shorten the service life of

every components of the machine.

Drill chuck

Chuck adaptor

Part of SDS-plus shank

Grip

Front cap

Fig. 14

4. When driving machine screws (Fig. 15)

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 3 (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 striking mode with chuck adaptor

(D) and bit attached.

Bit

Socket

Chuck adaptor (D)

Front cap

Grip

Fig. 15

5. When driving wood screws (Fig. 15)

(1) Selecting a suitable driver bit

Employ plus-head screws, if possible, since the

driver bit easily slips off the heads of slotted-head

screws. (2) Driving wood screws 䡬 Prior to driving 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.

6. Using depth gauge (Fig. 16)

(1) Loosen the knob on the side handle, and insert

the depth gauge into the mounting hole on the

side handle. (2) Adjust the depth gauge position according to the

depth of the hole and tighten the knob bolt

securely.

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

taper shank adaptor

(1) Mount the taper shank adaptor to the rotary

hammer. (Fig. 17) (2) Mount the drill bit (taper shank) to the taper shank

adaptor. (Fig. 17) (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. 18)

Side handle

Taper

Drill

shank

bit

adaptor

Cotter

English

Mounting hole

Depth gauge

Fig. 16

Front cap

Grip

Fig. 17

Taper shank adaptor

Rests

Fig. 18

English

8. Switching between the “SAVE” and the

“POWER” modes

The hammering force of the hammer can be

increased or decreased to conform with intended

usage, by operating the shift knob as per Fig. 19.

Adjust the force to match the usage intended. (1) “SAVE” mode ... decreased hammering force

This can prevent thin drill bits which are less than

5 mm in diameter, from being bent or broken. (2) “POWER” mode ... increased hammering force 䡬 This can be used to speedily and efficiently drill

holes when the drill bits which are being used are

greater than 5 mm in diameter. 䡬 This can be used to drill holes into wood or metal.

CAUTION:

Do not drill holes in wood with the “SAVE” mode.

There is a likelihood that the motor will burn out

because it can easily lock up due to the low power.

“SAVE” mode

Shift knob

“POWER” mode

Fig. 19

English

MAINTENANCE AND INSPECTION

CAUTION: Pull out battery before doing any inspection or maintenance.

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. Check the Mounting Screws

Loose mounting screws are dangerous. Regularly inspect them and make sure they

are tight.

CAUTION: Using this power tool 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. 20)

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 No. shown in the figure.

In addition, always keep carbon brushes clean and

ensure that they slide freely within the brush

holders.

5. Replacing the carbon brushes

(1) Loosen the screws (2) for the chuck cover, then

remove the chuck cover from the housing. (Fig.

21, Fig. 22) (2) Pinch the terminals for the carbon brushes with

pliers, then pull them out of the brush holder. (Fig.

23)

(3) Pull the springs forward with a slotted screwdriver,

then remove the carbon brushes. (Fig. 24) (4) Reverse these procedures to install the brushes.

Wear limit

0.12" (3 mm)

0.45"

(11.5 mm)

Fig. 20

Grip cover

Screw

Fig. 21

Pull

Fig. 23

Pliers

Terminal

Carbon brush

Fig. 24

Fig. 22

Spring

Slotted screwdriver

English

6. How to replace grease

Low viscosity grease is applied to this rotary hammer so that it can be used for a long

period without replacing the grease. Please contact the nearest service center for grease

replacement when any grease is leaking from loosened screw. Further use of the rotary

hammer despite the grease shortage causes seizure to reduce the service life.

CAUTION: A specific grease is used with this machine, therefore, the normal

performance of the machine may be badly affected by use of other grease. Please be sure to let one of our service agents undertake replacement of the grease.

7. Check for Dust

Dust may be removed with a soft cloth or a cloth dampened with soapy water.

Do not use bleach, chlorine, gasoline or thinner, for they may damage the plastics.

8. Disposal of the exhausted battery

WARNING: Do not dispose of the exhausted battery. The battery must explode if it

is incinerated. The product that you have purchased contains a rechargeable battery. The battery is recyclable. At the end of it’s useful life, under various state and local laws, it may be illegal to dispose of this battery into the municipal waste stream. Check with your local solid waste officials for details in your area for recycling options or proper disposal.

9. Storage

Storing in a place below 104°F (40°C) and out of the reach of children.

10. 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.

English

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

DH24DV (BFK)

DH24DV (2BFK)

1 Side handle (Code No. 323155) ................................................... 1

2 Depth gauge (Code No. 310331) .................................................. 1

3 Charger (UC24YFB) .......................................................................... 1

4 Plastic case (Code No. 323169) .................................................... 1

1 Side handle (Code No. 323155) ................................................... 1

2 Depth gauge (Code No. 310331) .................................................. 1

3 Charger (UC24YFB) .......................................................................... 1

4 Plastic case (Code No. 323169) .................................................... 1

5 Extra battery (EB2420) .................................................................... 1

OPTIONAL ACCESSORIES.....sold separately

1. Battery (EB2420)

English

3. Knock-in anchor (Rotation + Striking)

Anchor Setter (for anchor setting) (SDS-plus shank)

Anchor size

Overall Length

Code No. 302976 302975 303621 302974

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

(6.3 mm) (8 mm) (9.5 mm) 10-15/64" 10-15/64" 6-19/64" 10-15/64"

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

Anchor size

Overall Length

Code No. 302979 302978 303622 302977

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

(6.3 mm) (8 mm) (9.5 mm) 10-15/64" 10-15/64" 6-19/64" 10-15/64"

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

English

Anchor setting adaptor (for manual hammer)

<Outer wedge type with

the female screw>

Anchor size Code No.

W1/4"

(6.3 mm)

W5/16" (8 mm)

W3/8"

(9.5 mm)

W1/2"

(12.7 mm)

W5/8"

(15.9 mm)

971794

971795

971796

971797

971798

<Inner wedge type with

the headless screw>

Anchor size Code No.

W1/4"

(6.3 mm)

W5/16"

(8 mm)

W3/8"

(9.5 mm)

W1/2"

(12.7 mm)

W5/8"

(15.9 mm)

971799

971800

971801

971802

971803

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