Hitachi DH 24PB3 User Manual

Model

Modèle

Modelo

DH 24PB3

Rotary Hammer Marteau rotatif Martillo perforador

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.

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.

MANUALDEINSTRUCCIONESEINSTRUCCIONESDESEGURIDAD

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.

DOUBLE INSULATION

DOUBLE ISOLATION

AISLAMIENTO DOBLE

					CONTENTS
English											Page
					Page
IMPORTANT SAFETY INFORMATION ........						3	ASSEMBLY AND OPERATION ............				10
MEANINGS OF SIGNAL WORDS ..........						3	APPLICATIONS .................................				10
						4	PRIOR TO OPERATION .....................				10
SAFETY ...................................................							HOW TO USE ....................................				12
GENERAL SAFETY RULES .................						4	HOW TO USE THE CORE BIT (FOR LIGHT LOAD)				... 15
SPECIFIC SAFETY RULES AND SYMBOLS					.....	6	MAINTENANCE AND INSPECTION				17
DOUBLE INSULATION FOR SAFER
OPERATION .....................................						8	ACCESSORIES ......................................				18
FUNCTIONAL DESCRIPTION						9	STANDARD ACCESSORIES .............				18
							OPTIONAL ACCESSORIES ...............				18
NAME OF PARTS ................................						9	PARTS LIST				70
SPECIFICATIONS ................................						9
			TABLE DES MATIERES
Français											Page
					Page
INFORMATIONS IMPORTANTES DE SÉCURITÉ ...						24	ASSEMBLAGE ET FONCTIONNEMENT ....				32
SIGNIFICATION DES MOTS							APPLICATIONS .................................				32
D’AVERTISSEMENT .........................						24	AVANT L’UTILISATION ....................				32
SECURITE						25	UTILISATION .....................................				34
							COMMENT UTILISER LA COURONNE (POUR
REGLES GENERALE DE SECURITE .......						25		UNE CHARGE LEGERE) .........................			38
REGLES DE SECURITE SPECIFIQUES ET SYMBOLES					...	27	ENTRETIEN ET INSPECTION				40
DOUBLE ISOLATION POUR UN
							ACCESSOIRES				41
FONCTIONNEMENT PLUS SUR ........						30
DESCRIPTION FONCTIONNELLE						31	ACCESSOIRES STANDARD .............				41
							ACCESSOIRES SUR OPTION				41
NOM DES PARTIES						31
							LISTA DES PIÈCES				70
SPECIFICATIONS						31
						ÍNDICE
Español										Página
			Página
INFORMACIÓN IMPORTANTE SOBRE SEGURIDAD ...						47	MONTAJE Y OPERACIÓN ...................				55
SIGNIFICADO DE LAS PALABRAS DE							APLICACIONES .................................				55
SEÑALIZACIÓN .................................						47	ANTES DE LA OPERACIÓN ..............				55
SEGURIDAD						48	COMO SE USA ..................................				57
							MODO DE USAR LA BARRENA TUBULAR
NORMAS GENERALES DE SEGURIDAD						48
					...			(PARA CARGAS LIGERAS)			61
NORMAS Y SÍMBOLOS ESPECÍFICOS DE SEGURIDAD						50
							MANTENIMIENTO E INSPECCIÓN				63
AISLAMIENTO DOBLE PARA OFRECER UNA
OPERACIÓN MÁS SEGURA ...................						53	ACCESORIOS .......................................				64
DESCRIPCIÓN FUNCIONAL						54	ACCESORIOS ESTÁNDAR ...............				64
			................				ACCESORIOS OPCIONALES				64
NOMENCLATURA						54
							LISTA DE PIEZAS				70
ESPECIFICACIONES ..........................						54

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.

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SAFETY

GENERAL SAFETY RULES

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)Double Insulated tools are equipped with a polarized plug (one blade is wider than the other.) This plug will fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse the plug. If it still does not fit, contact a qualified electrician to install a polarized outlet.

Do not change the plug in any way. Double Insulation eliminates the need for the three wire grounded power cord and grounded power supply system.

(2)Avoid body contact with grounded surfaces such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is grounded.

(3)Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.

(4)Do not abuse the cord. Never use the cord to carry the tools or pull the plug from a receptacle. Keep cord away from heat, oil, sharp edges or moving parts. Replace damaged cords immediately. Damaged cords increase the risk of electric shock.

(5)When operating a power tool outside, use an outdoor extension cord marked “W-A” or “W”. These cords are rated for outdoor use and reduce the risk of electric shock.

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 tires 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.

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English

(3)Avoid accidental starting. Be sure switch is off before plugging in. Carrying tools with your finger on the switch or plugging in tools that have 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 enables 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.

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 the plug form the power source before making any adjustments, changing accessories, or storing the tool. 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)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.

(7)Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the tool's operation. If damaged, have the tool serviced before using. Many accidents are caused by poorly maintained tools.

(8)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 with 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.

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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 or its own cord. Contact with a “live” wire will make exposed metal parts of the tool “live” and shock the operator.

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

Prolonged exposure to high intensity noise can cause hearing loss.

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

4.NEVER wear gloves made from materials likely to roll up such as cotton, wool, cloth or string, etc.

5.ALWAYS attach the side handle and securely grip the Rotary Hammer.

6.NEVER touch moving parts.

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

7.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.

8.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.

9.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.

10.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.

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

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

12.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.

13.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.

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English

14.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.

15.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.

16.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.

17.NEVER leave tool running unattended. Turn power off.

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

18.Carefully handle power tools.

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

19.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.

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

of ANSI Standard Z87.1.

21.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.

22.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

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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:

Only HITACHI AUTHORIZED SERVICE CENTER should disassemble or assemble this power tool, and only genuine HITACHI replacement parts should be installed.

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.

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

Depth gauge		Nameplate
		Housing
Drill bit
Front cap		Stopper
	Push button
Grip		Handle
Side handle	Change lever
		Switch
	Push button
	Fig. 1
SPECIFICATIONS
Motor	Single-Phase, Series Commutator Motor
Power Source	Single-Phase, 120 V 60 Hz
Current	7.0 A
Capacity	Concrete:	1/8" ~ 15/16" (3.4 mm ~ 24 mm)
	Steel:	1/2" (13 mm)
	Wood:	1-1/4" (32 mm)
No-Load Speed	0 – 1,050/min.
Full-load Impact Rate	0 – 4,600/min.
Weight	5.0 lbs (2.3 kg)

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ASSEMBLY AND OPERATION

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)

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.

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 fautly 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.

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6. Mounting the drill bit (Fig. 2)

Front cap

Grip

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)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)

Part of SDS-plus shank

Drill bit

Fig. 2

Grip

Fig. 3

Dust cup

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.

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.

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).

Fig. 4

Dust collector (B)

Fig. 5

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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).

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.

	L	Push
R	L	button
L	R
	R

Fig. 6

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. However, the switch trigger can only be pulled in halfway during reverse and rotates at half the speed of forward operation.

Pulling the trigger and pushing the stopper, it keeps the switched-on condition which is convenient for continuous running. When switching off, the stopper can be disconnected by pulling the trigger again. The switch stopper is unusable

during reverse.

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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).

(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.

CAUTION:

English

Change lever

Push button

Fig. 7

Fig. 8

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. 8.

	3. Rotation only	Change lever
	This rotary hammer can be set to
	rotation only mode by pressing the
	push button and turning the change
	lever to mark (Fig. 9).
	To drill a wood or metal material using	Push button
	the separately sold drill chuck and chuck
	adaptor, proceed as follows. Installing	Fig. 9

	drill chuck and chuck adaptor (Fig. 10):		Front cap	Grip
	(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.		Part of SDS-plus
	Drill chuck
			shank
		Chuck adaptor
	CAUTION:		Fig. 10

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.

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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 striking function with the drill chuck and chuck adaptor attached. This would seriously shorten the service life of every components of the machine.

4.When driving machine screws (Fig. 11)

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 5 (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:

Bit

Socket

Chuck adaptor (D)	Front cap
	Grip

Fig. 11

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 function with chuck adaptor (D) and bit attached.

5. When driving wood screws (Fig. 11)

(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.

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6. Using depth gauge (Fig. 12)

(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. 13).

(2)Mount the drill bit (taper shank) to the taper shank adaptor (Fig. 13).

(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. 14).

English

Mounting hole

Depth gauge

Knob on side handle

		Fig. 12
	Drill bit	Grip
	Taper shank	Front cap
	adaptor

Fig. 13

Rests

Fig. 14

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.

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(1)Mount the core bit to the core bit shank (Fig. 15).

Lubricate the thread of the core bit shank to facilitate disassembly.

(2)Mount the core bit shank to the rotary hammer (Fig. 16).

(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. 17).

2. How to bore (Fig. 18)

(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. 19)

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.

Core bit

Thread

Core bit shank

Fig. 15

	Fig. 16
	Guide plate
Center pin	Core bit tip
Core bit

Fig. 17

Fig. 18

Core bit shank

Fig. 19

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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

For your continued safety and electrical shock protection, carbon brush inspection and replacement on this tool should ONLY be performed by a HITACHI AUTHORIZED SERVICE CENTER.

5.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.

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.

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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. 324555) ...............................................................................	1
(2)Side Handle (Code No. 324548) ...............................................................................	1
(3)Depth Gauge (Code No. 310331) .............................................................................	1
OPTIONAL ACCESSORIES...........	sold separately

1. Drilling anchor holes (Rotation + Hammering)

Drill Bit (Slender shaft)

(1) Drill Bit (Slender		(2)	Adaptor for slender shaft
Shaft)			(SDS-plus shank)
		(1) Drill Bit (Slender Shaft)			(2) Adaptor for
					Slender Shaft
Outer diameter	Effective Length Overall Length			Code No.	Code No.
1/8"		1-25/32"	3-35/64"	306369
(3.4 mm)		(45 mm)	(90 mm)
					306370
9/64"		1-25/32"	3-35/64"
				306368
(3.5 mm)		(45 mm)	(90 mm)

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Drill Bit (Taper shank) and taper shank adaptor

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

(SDS-plus shank)

	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)

Cotter (Code No. 944477)

	Taper mode	Code No.	Applicable drill bit
				7/16" (11 mm)
			Drill bit	1/2" (12.3 mm)
	Morse taper	303617		1/2" (12.7 mm)
			(Taper
				9/16" (14.3 mm)
	(No. 1)		shank)
				9/16" (14.5 mm)
				11/16" (17.5 mm)
	Morse taper	303618	Drill bit	7/8" (21.5 mm)
			(Taper
	(No. 2)
			shank)
	A-taper	303619	Taper shank adaptor formed A-
			taper or B-taper is provided as an
	B-taper	303620	optional accessory, but drill bit for
			it is not provided.

1/2" (13 mm) Hammer Drill chuck and Chuck wrench

For drilling operations when using a straight shank bit for impact drilling with a rotary hammer

Impact Drill		1/2" (13 mm) Hammer Drill
Application		Chuck (SDS-plus shank)
Straight shank Bit		(includes Chuck wrench)

Chuck wrench

Name	Code No.
1/2" (13 mm) Hammer Drill Chuck	303332
Chuck wrench	303334
Rubber Cap	303335

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2. Knock-in anchor (Rotation + Hammering)

Anchor Setter (for anchor setting)

(SDS-plus shank)

<Outer wedge type with the female screw>

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

<Inner wedge type with the headless screw>

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

(for

<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)

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3. Large hole boring (Rotation + Hammering)

	Guide	Center pin		Core Bit	Core bit Shank
	Plate				(SDS-plus shank)
	Center	Code No.	Core bit (outer diameter)		Code No.		Core bit shank		Code No.
	pin
	–	–		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)
	(B)	982685	1-3/4" (45 mm)		982677		(B)	12"	303627
			(B)	2" (50 mm)	982678			(300 mm)
	Guide plate
	Core bit		Code No.	Core bit		Code No.
	(outer diameter)			(outer diameter)
	1-1/4" (32 mm)		982686	1-3/4" (45 mm)		982689
	1-3/8" (35 mm)		982687	2" (50 mm)		982690
	1-1/2" (38 mm)		982688

4. Crushing operation (Rotation + Hammering)

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

Code No. 303046

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5. Bolt placing operation with Chemical Anchor (Rotation + Hammering)

Standard socket	)	(SDS-plus shank)
(on the market		1/2" (12.7 mm) Chemical
		Anchor Adapter
		(Code No.303044)
		3/4" (19 mm) Chemical
		Anchor Adapter
		(Code No. 303045)

6. Drilling holes and driving screws (rotation only)Drill chuck, chuck adaptor and chuck wrench

Special screw	Drill chuck (13VLRB–D)	Chuck adaptor (G)
Code No. 981122	(includes chuck wrench)	(SDS-plus shank)
	Code No. 321814	Code No. 303623

Chuck wrench

7. Drilling holes (rotation only)

Drill chuck (13VLD–D)	Chuck adaptor (D)
(includes chuck wrench)	(SDS-plus shank)
Code No. 321813	Code No. 303624

Chuck wrench

1/2" (13 mm) drill chuck ass’y (includes chuck wrench) and chuck (for drilling into steel or wood).

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