Hitachi G 18MR, G 23MR User Manual
Model Disc Grinder
Modèle Meuleuse
Modelo Amoladora angular
G 18MR • G 23MR
G23MR
SAFETY INSTRUCTIONS AND INSTRUCTION MANUAL
WARNING
IMPROPER OR 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 other users and owners before they use the power tool.
This manual should be stored in safe place.
INSTRUCTIONS DE SECURITE ET MODE D’EMPLOI
AVERTISSEMENT
Une utilisation INCORRECTE OU 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 et
propriétaires avant qu’ils utilisent l’outil motorisé.
Ce mode d’emploi doit être conservé dans un endroit sûr.
INSTRUCCIONES DE SEGURIDAD Y MANUAL DE INSTRUCCIONES
ADVERTENCIA
¡La utilización INAPROPIADA O PELIGROSA de esta herramienta eléctrica puede resultar
en lesiones de gravedad o 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 utilizar la herramienta eléctrica.
Este manual debe ser guardado en un lugar seguro.
DOUBLE INSULATION
DOUBLE ISOLATION
AISLAMIENTO DOBLE
English
IMPORTANT SAFETY INFORMATION ...... 3
MEANINGS OF SIGNAL WORDS .............. 3
SAFETY ............................................................ 4
GENERAL SAFETY RULES ......................... 4
SPECIFIC SAFETY RULES AND
SYMBOLS..............................................6
DOUBLE INSULATION FOR SAFER
OPERATION .......................................... 8
FUNCTIONAL DESCRIPTION ....................... 10
NAME OF PARTS ...................................... 10
SPECIFICATIONS ...................................... 10
CONTENTS
Page Page
ASSEMBLY AND OPERATION ..................... 11
APPLICATIONS ......................................... 11
PRIOR TO OPERATION ............................. 11
GRINDER OPERATION ............................. 13
DEPRESSED CENTER WHEEL
ASSEMBLY AND DISASSEMBLY ...... 14
MAINTENANCE AND INSPECTION ............. 15
ACCESSORIES .............................................. 17
STANDARD ACCESSORIES ..................... 17
OPTIONAL ACCESSORIES ....................... 17
PARTS LIST ................................................... 50
Français
INFORMATIONS IMPORTANTES DE
SÉCURITÉ ............................................ 18
SIGNIFICATION DES MOTS
D’AVERTISSEMENT ........................... 18
SECURITE ......................................................19
REGLES GENERALE DE SECURITE ......... 19
REGLES DE SECURITE SPECIFIQUES
ET SYMBOLES .................................... 21
DOUBLE ISOLATION POUR UN
FONCTIONNEMENT PLUS SUR ........ 24
DESCRIPTION FONCTIONNELLE ................ 25
NOM DES PARTIES .................................. 25
SPECIFICATIONS ...................................... 25
Español
INFORMACIÓN IMPORTANTE SOBRE
SEGURIDAD ........................................ 33
SIGNIFICADO DE LAS PALABRAS DE
SEÑALIZACIÓN...................................33
SEGURIDAD .................................................. 34
NORMAS GENERALES DE SEGURIDAD 34
NORMAS Y SÍMBOLOS ESPECÍFICOS DE
SEGURIDAD ........................................ 36
AISLAMIENTO DOBLE PARA OFRECER
UNA OPERACIÓN MÁS SEGURA ..... 39
DESCRIPCIÓN FUNCIONAL ......................... 40
NOMENCLATURA ..................................... 40
ESPECIFICACIONES .................................. 40
TABLE DES MATIERES
Page Page
Página Página
ASSEMBLAGE ET FONCTIONNEMENT ...... 26
UTILISATIONS .......................................... 26
AVANT L’UTILISATION ............................ 26
UTILISATION DE LA MEULEUSE ............ 28
ASSEMBLAGE ET DESASSEMBLAGE
DE LA MEULE A DEPRESSION
CENTRALE .......................................... 29
ENTRETIEN ET INSPECTION ....................... 30
ACCESSOIRES .............................................. 32
ACCESSOIRES STANDARD ..................... 32
ACCESSOIRES SUR OPTION ................... 32
LISTE DES PIECES ........................................ 50
ÍNDICE
MONTAJE Y OPERACIÓN ............................ 41
APLICACIONES ......................................... 41
ANTES DE LA OPERACIÓN ...................... 41
OPERACIÓN DE LA AMOLADORA
ANGULAR ........................................... 43
MONTAJE Y DESMONTAJE DE LA
RUEDA DE DISCO ABOMBADO ........ 44
MANTENIMIENTO E INSPECCIÓN .............. 46
ACCESORIOS ................................................ 48
ACCESORIOS ESTÁNDAR ....................... 48
ACCESORIOS OPCIONALES .................... 48
LISTA DE PEIZAS .......................................... 50
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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English
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
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) Don’t 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
an outlet. 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 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.
eliminates the need for the three wire grounded power cord and
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(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.
English
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SPECIFIC SAFETY RULES AND SYMBOLS
1. ALWAYS use proper guard with grinding wheel. A guard protects operator from broken
wheel fragments.
2. Accessories must be rated for at least the speed recommended on the tool warning
label. Wheels and other accessories running over rated speed can fly apart and cause
injury.
3. 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.
4. ALWAYS wear ear protectors when using the tool for extended periods.
Prolonged exposure to high intensity noise can cause hearing loss.
5. Use only a depressed center wheel with a rated capacity which is GREATER than 6600
RPM. Using any wheel a rated capacity LESS than 6600 RPM and/or an incorrect sized
wheel (see SPECIFICATIONS at page 10) may result in wheel breakage, flying wheel
fragments, and resulting in death or serious injury.
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.
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English
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 youself or others. Blades, cutting implements and
accessories which have been mounted to the tool should be secure and tight.
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. NEVER use a depressed center wheel which is cracked or deformed or worn away (see
the MAINTENANCE AND INSPECTION section on page 15).
21. NEVER use the grinder in places where the sparks generated by the grinder can cause
explosion, such as where flammable materials or gases are present.
22. NEVER push in the push button while the spindle is running.
23. ALWAYS wear eye protection that meets the requirement of the latest revision of ANSI
Standard Z87.1.
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English
24. ALWAYS wear a mask or respirator to protect yourself from dust or potentially harmful
particles generated during the grinding operation.
25. ALWAYS firmly grip the body handle and side handle while operating the grinder.
26. ALWAYS have a trial run before grinding commence (see “Test the grinder before
using” on page 12).
27. ALWAYS follow the instructions contained in this manual when replacing the depressed
center wheel.
28. 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.
29. 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
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. Either the symbol “
insulation” appear on the power tool or on the nameplate.
Although this system has no external grounding, you must still follow the normal electrical
safety precautions given in this Instruction Manual, including not using the power tool in
wet environments.
To keep the double insulation system effective, follow these precautions:
䡬 Only HITACHI AUTHORIZED SERVICE CENTER should disassemble or assemble this
power tool, and only genuine HITACHI replacement parts should be installed.
䡬 Clean the exterior of the power tool only with a soft cloth moistened with soapy water,
and dry thoroughly.
Never use solvents, gasoline or thinners on plastic components; otherwise the plastic
may dissolve.
8
” or the words “Double
SAVE THESE INSTRUCTIONS
AND
MAKE THEM AVAILABLE TO
OTHER USERS AND OWNERS
OF THIS TOOL!
English
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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
Push Button
Gear Cover
Packing Gland
Depressed Center Wheel
Housing
Brush Cover
Side Handle
Wheel Guard
Fig. 1
Handle
Switch
SPECIFICATIONS
Model G18MR G23MR
Motor Single-Phase Series Commutator Motor
Power Source Single-Phase 120 V AC 60 Hz / DC
Current 15 A
No-Load Speed 6000/min
Wheel Size:
External diam. 7" (180 mm) 9" (230 mm)
Hole diam. 7/8" (22 mm) 7/8" (22 mm)
Weight 11.9 lbs (5.4 kg)
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ASSEMBLY AND OPERATION
APPLICATIONS
䡬 Removal of casting fin and finishing of various type of steel, bronze and aluminum
materials and castings.
䡬 Grinding of welded sections or sections cut by means of an acetylene torch.
䡬 Grinding of synthetic resins, slate, brick, marble.
WARNING: To avoid the risk of serious injury, NEVER use this grinder with cup
wheels and/or saw blades.
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. Check your work environment
Ensure the following before operation;
䡬 No flammable gas, liquid, or object at worksite.
䡬 When grinding thin steel sheet it may cause a high booming noise.
To avoid such noise, place a rubber mat under the workpiece.
䡬 Clear the area of children or unauthorized personnel.
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6. Mounting the wheel guard
Be sure to mount the wheel guard at an angle that will protect the operator’s body from
injury by a broken wheel piece.
[Installing and adjusting the wheel guard]
䡬 Open the lever and insert the locating pin
of wheel guard, bringing it into line with
the across flats of packing ground.
䡬 Then, turn the wheel guard to a desired
position (for use).
䡬 Close the lever and fix it. If and when
required, carry out adjustments by
tightening or loosening the screw.
䡬 If the lever does not move smoothly, apply
some lubricating oil to the sliding section
between the set piece and the lever.
Fasten the wheel guard at the position
where the across flats of the wheel guard
positioning pin and packing ground are
aligned (the position where the wheel
guard is inserted), but do not use it.
Set Piece
Locating Pin
Lever
Wheel Guard
Screw
WARNING: If the wheel guard is not
attached properly, a broken
wheel may result in and
cause death or serious
injury.
Packing Gland
Fig. 2
Across
Flats
7. Thoroughly check that the depressed center wheel is free of cracks, splits and
other abnomalities before mounting. Make sure it is firmly clamped and has
been properly mounted. Refer to page 14 of this manual for Depressed Center
Wheel Assembly and Disassembly.
8. Test the grinder before using
Before actually beginning the grinding work, test the grinder by first clearing the area
of all other personnel. Make sure the wheel guard is in place and that you are wearing
eye protection. Turn the grinder “on”, and make sure the grinder runs smoothly and
shows no abnormalities.
Duration of the trial run is as follows:
When depressed center wheel is replaced .................. 3 minutes or more
When starting daily work .............................................. 1 minute or more
9. Use only properly rated depressed center wheels
Use only depressed center wheels rated at 6600 RPM or more.
Using a depressed center wheel rated less can lead to wheel disintegration during
operation and cause serious bodily injury.
10. Check the push button
Make sure that the push button is disengaged by pushing push button two or three
times before turning on the grinder. (Fig. 5)
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GRINDER OPERATION
1. Hold the grinder firmly by its handle and side handle (Fig. 1)
The grinder produces a counterforce which must be controlled by firmly holding onto
the grinder.
2. Turn the grinder “on” (Fig. 3)
While holding the grinder firmly, use one
finger to switch to the “on” position.
Switch ON: Push the locking button forward
and then press the switch lever.
*For continuous use, press the
switch lever. The switch lever
is locked by pushing the
locking button forward once
again.
(*Subject to change depending on area.)
Switch OFF: Press and release the switch lever.
Locking
Button
Fig. 3
Switch
Lever
3. Use light grinding pressure
There is no need to press hard when grinding. Usually the grinder’s own weight is
sufficient to allow the required light contact with the surface to be ground.
WARNING: Do not press the grinder forcibly against the surface to be ground. Heavy
pressure can result in wheel breakage and serious injury. It can also
damage the surface being ground or damage the grinder’s motor.
English
4. Use proper grinding angle
Grind only with the wheel’s edge by lifting the grinder 15° to 30°, as shown in Fig. 4.
CAUTION:
● Do not use the entire surface of the depressed center wheel. Use only the edge of the
depressed center wheel.
5. Move the grinder in the proper direction
When using a new depressed center wheel
in direction A (Fig. 4), the wheel edge may
cut into the workpiece. In this case, grind
in direction B (Fig. 4).
Once the wheel edge is worn, the workpiece
can be ground in both directions.
NOTE: The wheel provided (resinoid wheel) is rated as Class A grain and # 24 grain size. It
is most suitable for heavy grinding of steel and other types of materials.
AB
Fig. 4
15°–30°
6. Adjust operation to desired finish
For a fine finish, decrease pressure by lifting slightly. Grind slowly and at the appropriate
speed.
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CAUTION:
● The revolving depressed center wheel will create air turbulence.
Do no lay the grinder down in areas of dust or dirt until it has come to a complete
stop.
DEPRESSED CENTER WHEEL ASSEMBLY AND DISASSEMBLY
WARNING: Never attempt to assemble or disassemble the depressed center wheel,
unless the power switch is in the “OFF” position and the electrical
cord has been disconnected from the receptacle.
1. Assembly
(1) Turn the disc grinder upsidedown so that the spindle is facing upward.
(2) Align the oval-shaped indentation of the wheel washer with the notched part of the
spindle, then attach them.
(3) Fit the protuberance of the depressed center wheel onto the wheel washer.
(4) Screw the wheel nut onto the spindle.
(5) While pushing the push button with
one hand, lock the spindle by turning
the depressed center wheel slowly with
the other hand.
Tighten the wheel nut by using the
supplied wrench as shown in Fig. 5.
CAUTION:
● Tighten the wheel nut securely and confirm
that the depressed center wheel does not
wobble.
Wrench
Wheel Nut
Depressed
Center Wheel
Wheel
Washer
Tighten
2. Disassembly
To remove the depressed center wheel,
simply reverse the above-mentioned
procedure.
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Wheel
Guard
Spindle
Push
Button
Fig. 5
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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.
Using cracked, deformed or damaged wheels can lead to wheel
breakage and resulting serious injury.
1. Replacing the depressed center wheel
Replace the depressed center wheel when it has been worn out to about 2-3/8" (60mm)
in external diameter. Confirm that there is no crack or any damage to the depressed
center wheel. If there is a crack or a transformation in the wheel, replace it immediately.
2. Inspecting the screws
Regularly inspect all screws and ensure that they are fully tightened. Should any of the
screws be loosened, retighten them immediately.
WARNING: Using this grinder with loosened screws is extremely dangerous.
3. Confirm that there is no damage in the
wheel guard, the electrical cord and the
housing, etc.
Check that the on/off switch operates
normally.
4. Inspecting the carbon brushes (Fig. 6)
The motor employs carbon brushes which
are consumable parts. Replace the carbon
brush with a new one when it becomes
worn to its wear limit. Always keep carbon
brushes clean and ensure that they slide
freely within the brush holders.
Wear limit
0.89" (22.5mm)
No. of carbon
brush
61
0.26" (6.5mm)
Fig. 6
CAUTION:
● Using this grinder with a carbon brush
which is worn in excess of the wear limit
will damage the motor.
NOTE: Use HITACHI carbon brush No. 61
indicated in Fig. 6.
䡬 Replacing carbon brushes:
<Disassembly>
(1) Loosen the D4 tapping screw retaining
the brush cover and remove the brush
cover.
Carbon
Brush
Spring
Fig. 7
Brush Holder
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(2) Use the auxiliary hexagonal wrench or small screwdriver to pull up the edge of the
spring that is holding down the carbon brush. Remove the edge of the spring toward
the outside of the brush holder.
(3) Remove the end of the pig-tail on the carbon brush from the terminal section of
brush holder and then remove the carbon brush form the brush holder.
<Assembly>
(1) Insert the end of the pig-tail of the carbon brush in the terminal section of brush
holder.
(2) Insert the carbon brush in the brush holder.
(3) Use the auxiliary hexagonal wrench or small screwdriver to return the edge of the
spring to the head of the carbon brush.
(4) Mount the tail cover and tighten the D4 tapping screw.
5. 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.
6. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION:
● Repair, modification and inspection of Hitachi Power Tools must be carried out by a
Hitachi Authorized Service Center.
This Parts List will be helpful if presented with the tool to the Hitachi Authorized
Service Center when requesting repair or other maintenance.
In the operation and maintenance of power tools, the safety regulations and standards
prescribed in each country must be observed.
MODIFICATIONS: Hitachi Power Tools are constantly being improved and modified to
incorporate the latest technological advancements.
Accordingly, some parts (i.e. code numbers and/or design) may be
changed without prior notice.
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