Hitachi DH 38YE User Manual

English

MODEL

MODELE DH 38YE MODELO

ROTARY HAMMER MARTEAU ROTATIF MARTILLO GIRATORIO

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.

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.

DOUBLE INSULATION
DOUBLE ISOLATION
AISLAMIENTO DOBLE	1

English

					CONTENTS
	English										Page
					Page		OPERATION AND MAINTENANCE
	IMPORTANT INFORMATION .............					3					10
	MEANINGS OF SIGNAL WORDS					3	NAME OF PARTS ..............................
							SPECIFICATIONS				10
	SAFETY						ACCESSORIES ..................................				11
								STANDARD ACCESSORIES			11
	IMPORTANT SAFETY INSTRUCTIONS
						4		OPTIONAL ACCESSORIES ...........			11
	FOR USING ALL POWER TOOLS ..................						APPLICATIONS .................................				13
	IMPORTANT SAFETY INSTRUCTIONS						PRIOR TO OPERATION .....................				13
	FOR USE OF THE ROTARY HAMMER					7	HOW TO USE ....................................				15
							HOW TO USE THE CORE BIT				17
	REPLACEMENT PARTS					7
							HOW TO REPLACE GREASE				18
	POLARIZED PLUGS					7
							MAINTENANCE AND INSPECTION				19
	USE OF EXTENSION CORD					8
							SERVICE AND REPAIRS ...................				20
	DOUBLE INSULATION FOR SAFER OPERATION				.....	9	PARTS LIST .......................................				58
			TABLE DES MATIERES
	Français										Page
					Page		UTILISATION ET ENTRETIEN
	INFORMATIONS IMPORTANTES ....					21
	SIGNIFICATION DES MOTS D’AVERTISSEMENT ..					21	NOM DES PIECES .............................				29
	SECURITE						FICHE TECHNIQUE ...........................				29
							ACCESSOIRES				30
	CONSIGNES DE SECURITE IMPORTANTES POUR
								ACCESSOIRES STANDARD .........			30
	L’UTILISATION DE TOUS LES OUTILS ELECTRIQUES				...	22		ACCESSOIRES EN OPTION ..........			30
	CONSIGNES DE SECURITE IMPORTANTES						APPLICATIONS .................................				32
	POUR L’UTILISATION DU MARTEAU ROTATIF					26	AVANT L’UTILISATION ....................				32
							UTILISATION				33
	PIECES DE RECHANGE					26
							COMMENT REMPLACER LA GRAISS				35
	FICHE POLARISEES					26
							REMPLACEMENT DE LA GRAISSE				36
	UTILISATION D’UN CORDON DE RALLONGE					27
							ENTRETIEN ET INSPECTION				37
	DOUBLE ISOLATION POUR UN
							ENTRETIEN ET REPARATION				38
	FONCTIONNEMENT PLUS SUR					28
							LISTA DES PIÈCES ................................				58
						ÍNDICE
	Español
										Página
			Página
	INFORMACIÓN IMPORTANTE .........					39	OPERACIÓN Y MANTENIMIENTO
	SIGNIFICADO DE LAS PALABRAS DE SEÑALIZACIÓN ..					39	NOMENCLATURA ............................				47
	SEGURIDAD						ESPECIFICACIONES .........................				47
							ACCESORIOS ....................................				48
	INSTRUCCIONES IMPORTANTES DE SEGURIDAD PARA							ACCESORIOS ESTÁNDAR ............			48
	UTILIZACIÓN DE TODAS LAS HERRAMIENTAS ELÉCTRICAS ..					40		ACCESORIOS OPCIONALES ........			48
	INSTRUCCIONES IMPORTANTES DE SEGURIDAD						APLICACIONES .................................				50
	PARA UTILIZACIÓN DEL MARTILLO GIRATORIO					44	ANTES DE LA OPERACIÓN ..............				50
							MODO DE UTILIZACIÓN				51
	PIEZAS DE REEMPLAZO					44
							MODO DE USAR LA BARRENA TUBULAR				54
	ENCHUFES POLARIZADOS					44
							CAMBIO DE GRASA				55
	UTILIZACIÓN DE UN CABLE PROLONGADOR					45
							MANTENIMIENTO E INSPECCIÓN				.. 56
	AISLAMIENTO DOBLE PARA OFRECER UNA						SERVICIO Y REPARACIONES ..........				57
	OPERACIÓN MÁS SEGURA .........................					46	LISTA DE PIEZAS ..............................				58

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IMPORTANT INFORMATION

Read and understand all of the operating instructions, safety precautions and warnings 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, unless you first confirm that the planned use will be safe for you and others.

MEANINGS OF SIGNAL WORDS

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

CAUTION indicates a hazardous situations which, if ignored, could result in moderate personal injury, or could cause machine damage.

NOTE emphasizes essential information.

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SAFETY

INPORTANT SAFETY INSTRUCTIONS

FOR USING ALL POWER TOOLS

WARNING: Death or serious bodily injury could result from improper or unsafe use of power tools. To avoid these risks, follow these basic safety instructions:

READ ALL INSTRUCTIONS

1.NEVER TOUCH MOVING PARTS.

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

2.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.

3.ALWAYS WEAR EYE AND EAR PROTECTOR.

Protect yourself from flying or expelled wood chips, metal particles or other debris by using protective goggles or equivalent eye protector. Wear ear protector to protect yourself from excessive noise.

4.PROTECT YOURSELF AGAINST ELECTRIC SHOCK.

Prevent body contact with grounded surfaces such as pipes, radiators, ranges and refrigeration enclosures. Never operate the tool in damp or wet locations.

5.DISCONNECT TOOLS.

Never leave the tool connected to a power source. Always disconnect the tool from its power source before servicing, inspecting, maintaining, cleaning and before changing or checking any parts.

6.AVOID UNINTENTIONAL STARTING.

Don’t carry the tool while it is connected to its power source. Don’t carry the tool with your finger near the power switch. Be sure the power switch is in the “off” position before connecting the tool to its power source.

7.STORE TOOL PROPERLY.

When not in use, the tool should be stored in a dry place. Keep out of reach of children. Lock-out the storage area.

8.KEEP WORK AREA CLEAN.

Cluttered areas and benches invite injuries. Clear all work areas and work benches of unnecessary tools, debris, furniture, etc.

9.CONSIDER WORK AREA ENVIRONMENT.

Don’t expose power tools to rain. Don’t use power tools in damp or wet locations. Keep work area well lit and well ventilated.

Don’t use tool in presence of flammable liquids or gases.

Power tools produce sparks during operation. They also spark when switching ON/ OFF. Never use power tools in sites containing lacquer, paint, benzine, thinner, gasoline, gases, adhesive agents, and other materials which are combustible or

explosive.

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10.KEEP CHILDREN AWAY.

Do not let visitors contact tool or extension cord.

All visitors should be kept safely away from work area.

11.DON’T FORCE TOOL.

It will do the job better and safer at the rate for which it was intended.

12.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.

13.DRESS PROPERLY.

Do not wear loose clothing or jewelry. They can be caught in moving parts. Rubber gloves and non-skid footwear are recommended when working outdoors. Wear protective hair covering to contain long hair.

14.USE FACE, DUST MASK OR RESPIRATOR IF OPERATION IS DUSTY.

All persons in the area where power tools are being operated should also wear face, dust mask or respirator.

15.DON’T ABUSE CORD.

Never carry tool by cord or yank it to disconnect from receptacle. Keep cord from heat, oil and sharp edges.

16.SECURE WORK.

Use clamps or a vise to hold work. It’s safer than using your hand and it frees both hands to operate tool.

17.DON’T OVERREACH.

Keep proper footing and balance at all times.

18.MAINTAIN TOOLS WITH CARE.

Keep tools sharp and clean for better and safer performance. Follow instructions for lubricating and changing accessories.

Inspect tool cords periodically and if damaged, have repaired by an authorized service center. Inspect extension cords periodically and replace if damaged.

Keep handles dry, clean, and free from oil and grease.

19.REMOVE ADJUSTING KEYS AND WRENCHES.

Keys and adjusting wrenches remove from tool before turning it on.

20.OUTDOOR USE EXTENSION CORD.

When tool is used outdoors, use only extension cord intended for use outdoors and so marked.

21.STAY ALERT.

Watch what you are doing. Use common sense. Do not operate tool when you are tired. Tools should never be used by you if you are under the influence of alcohol, drugs or medication that makes you drowsy.

22.CHECK DAMAGED PARTS.

Before further use of the tool, a guard or other part that is damaged should be carefully checked to determine that it will operate properly and perform its intended function. Check for alignment of moving parts, binding of moving parts, breakage of parts, mounting, and any other conditions that may affect its operation.

A guard or other part that is damaged should be properly repaired or replaced by an authorized service center unless otherwise indicated elsewhere in this Instruction Manual.

Have defective switches replaced by the authorized service center. Do not use tool if switch does not turn it on and off.

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23.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.

24.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.

25.CHECK FOR LIVE WIRES.

Avoid the risk of severe electrical shock by checking for live electrical wires that may be buried in walls, floors or ceilings. The wires should be de-energized before work begins.

26.KEEP ALL SCREWS, BOLTS AND COVERS TIGHTLY IN PLACE.

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

27.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.

28.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.

29.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.

30.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.

31.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.

32.NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER OFF.

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

33.CAREFULLY HANDLE POWER TOOLS.

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

34.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.

35.USE ONLY GENUINE HITACHI REPLACEMENT PARTS.

Replacement parts not manufactured by Hitachi may void your warranty and can lead to malfunction and resulting injuries. Genuine Hitachi parts are available from your dealer.

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IMPORTANT SAFETY INSTRUCTIONS

FOR USE OF THE ROTARY HAMMER

WARNING: Death or serious bodily injury could result from improper or unsafe use of the demolition 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 Rotary Hammer.

4.ALWAYS wear eye and ear protectors during operation.

5.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.

REPLACEMENT PARTS

When servicing use only identical replacement parts.

Repairs should be conducted only by a Hitachi authorized service center.

POLARIZED PLUGS

To reduce the risk of electrick shock, this equipment has 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 the proper outlet. Do not change the plug in any way.

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USE OF EXTENSION CORD

Make sure your extension cord is in good condition. When using an extension cord, be sure to use one heavy enough to carry the current your product will draw. An undersized cord will cause a drop in line voltage resulting in loss of power and overheating. Table shows the correct size to use depending on cord length and nameplate ampere rating. If in doubt, use the next heavier gage. The smaller the gage number, the heavier the cord.

MINIMUM GAGE FOR CORD SETS

				Total Length of Cord in Feet (Meter)
			0 – 25	26 – 50	51 – 100	101 – 150
			(0 – 7.6)	(7.9 – 15.2)	(15.5 – 30.5)	(30.8 – 45.7)
Ampere		Rating			AWG
More	Not More
Than	Than
0	– 6		18	16	16	14
6 – 10			18	16	14	12
10	– 12		16	16	14	12
12	– 16		14	12	Not Recommended

WARNING: Avoid electrical shock hazard. Never use this tool with a damaged or frayed electrical cord or extension cord.

Inspect all electrical cords regularly. Never use in or near water or in any environment where electric shock is possible.

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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 and “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 OF THIS TOOL!

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OPERATION AND MAINTENANCE

NOTE:

The information contained in this Instruction Manual is designed to assist you in the safe operation and maintenance of the power tool.

Some illustrations in this Instruction Manual may show details or attachments that differ from those on your own power tool

NAME OF PARTS

Side handle

Switch trigger

		Selector lever
Tool holder			Housing
			Nameplate
			Set screw
			Cap cover
			Brush cap
			(Under the cap cover)
			Fig. 1
SPECIFICATIONS
Motor			Single-Phase, Series Commutator Motor
Power Source			Single-Phase, 115V AC 60Hz
Current			8A
Capacity			Drill Bit: 1-1/2" (38 mm)
			Core Bit: 4-1/8" (105 mm)
No-Load Speed			380/min
Full-load Impact Rate			2800/min.
Weight			17 lbs (7.7 kg)

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APPLICATIONS

Rotation and hammering function

Drilling anchor holes

Drilling holes in concrete Hammering function only

Crushing concrete, chipping, digging, and squaring (by applying 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.

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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.

6.How to install dust cover (Fig. 2)

Always install the dust cover on the drill bit or the taper shank adaptor. Insert the dust cover until it lies flush in the groove.

NOTE: For a thick drill bit, insert the dust cover from drill rear.

7. How to install tool

CAUTION: For tools such as a bull point and a cold chisel, use only Hitachi genuine parts.

(1)Clean, then smear the tool shank with the grease provided.

(2)Pull the tool holder in the direction of arrow 1 and rotate it in the direction of arrow 2 (counterclockwise). Fully insert the tool shank into the hexagonal hole of the front cover. (Fig. 3)

(3)Return the tool holder to fix the tool.

NOTE: Remove in the reverse order to installation.

Insert up to the groove

Dust cover

Fig. 2

Front Cover

Tool Shank

Tool Holder

Fig. 3

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HOW TO USE

1. How to drill holes (Fig. 4)

(1)Pull the switch trigger after applying the drill bit tip to the drilling position.

(2)It is unnecessary to forcibly press the rotary hammer main body. It is sufficient to slightly press the rotary hammer to an extent that clips are freely discharged.

CAUTION:

Although this machine is equipped with a safety clutch, if the drill bit becomes bound in concrete or other material, the resultant stoppage of the drill bit could cause the machine body to turn in reaction. Ensure that the main handle and side handle are gripped firmly during operation.

2.How to chisel or crush (Fig. 5)

By applying the tool tip to the chiseling or crushing position, operate the rotary hammer by utilizing its empty weight. Forcible pressing or thrusting is unnecessary.

3.How to select rotation-hammering and

hammering. (Fig. 6)

(1)Rotation-hammering

Rotate the selector lever counter-clockwise and align with mark.

(2)Rotate the selector lever clockwise and align with .

CAUTION:

Turning the selector lever during motor rotation will rotate the tool accidentally. The selector lever should only be turned when the motor is stopped.

English

Fig. 4

Fig. 5

ID Mark	Selector
	Lever

Fig. 6

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4. How to use stopper

(1)Install the stopper (Fig. 7)

1 Loosen the side handle and insert the straight portion of the stopper into the handle bolt hole from the front cover.

2Loosen the side handle, move the stopper to the specified position and rotate the grip of the side handle clockwise to fix the stopper.

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

(1)Install drill bit with taper shank in the taper shank adaptor.

(2)Turn the power on and drill a base hole.

(3)After cleaning out dust with a syringe, attach the plug to the anchor tip and drive in the anchor with a manual hammer.

(4)To remove the drill bit with taper shank, insert a cotter into the slot of the taper shank adaptor, place supports under the rotary hammer and tap the cotter with a manual hammer. (Fig. 9)

Stopper

Side Handle

Fig. 7

Taper Shank Adaptor

Drill Bit (Taper shank)

Fig. 8

Taper Shank

Adaptor

Cotter

Support

Fig. 9

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HOW TO USE THE CORE BIT

When boring penetrating large hole use the core bit. 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. 10)

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

(2)Mount the core bit shank to the rotary hammer. (Fig. 11)

(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. 12)

2. How to bore (Fig. 13)

(1)Connect the plug to the receptacle.

(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 from the receptacle.

English

Core Bit

Core Bit Shank

Fig. 10

Fig. 11

Guide Plate

Center Pin

Core Bit Tip

Core Bit

Fig. 12

Fig. 13

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3.Dismounting (Fig. 14)

Remove the core bit shank from the rotary hammer and strike the head of the core bit shank strongly two or three times with a manual hammer holding the core bit, then the thread becomes loose and the core bit can be removed.

HOW TO REPLASE GREASE

Core Bit Shank

Fig. 14

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.

1.Grease replacement period

After purchase, replace grease after every 6 months of usage. Ask for grease replacement at the nearest HITACHI Authorized Service Center. Proceed for replacement of grease.

2.Grease replenishment

CAUTION:

Before replenishing the grease, turn the power off and pull out the power plug.

(1)Remove the crank case cover and wipe off the grease inside.

(2)Apply 0.7 oz (20 g) of HITACHI Electric Hammer Grease A (standard accessory, contained in tube) to the crank case.

As the tube contains 1 oz (30 g) of grease, supply 2/3 of the contained grease.

(3)After replenishing the grease, install the crank case securely.

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.

Crank Cover

Fig. 15

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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 mounting screws

Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loosened, retighten them immediately.

WARNING: Using this rotary hammer with loosened 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. 16)

The Motor employs carbon brushes which are consumable parts. When they become worn to or near the “wear limit”, it could result in motor trouble. When an auto-stop carbon brush is equipped, the motor will stop automatically. At that time, replace both carbon brushes with new ones which have the same carbon brush Numbers shown in the 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.

Wear limit
		a	No. of
			carbon brush
	Usual carbon	0.24"	43
	brush	(6 mm)
brush	Auto-stop	0.28"	73
a	carbon brush	(7 mm)
0.67"
(17 mm)

Fig. 16

NOTE: Use HITACHI carbon brush indicated in Fig. 16.

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Replacing carbon brushes: (For parts name, refer to Fig. 1)

Loosen the set screw then remove the cap cover. Remove the brush cap and carbon brush. After replacing the carbon brush, do not forget to tighten the brush cap securely and to install the cap cover.

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.

NOTE:

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

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