Hitachi WH 22 User manual

English

1

WH 14 • WH 16 • WH 22

MODEL IMPACT WRENCH

MODÈLE CLÉ À CHOC

MODELO

LLAVE DE IMPACTO

DOUBLE INSULATION

DOUBLE ISOLATION

AISLAMIENTO DOBLE

MODE D’EMPLOI ET INSTRUCTIONS DE SECURITE

AVERTISSEMENT

Une utilisation incorrecte et dangereuse de cet outil motorisé peut entraîner la

mort ou de sérieuses blessures corporelles!

Ce mode d’emploi contient d’importantes informations à propos de la sécurité de

ce produit. Prière de lire et de comprendre ce mode d’emploi avant d’utiliser l’outil

motorisé. Garder ce mode d’emploi à la disponibilité des autres utilisateurs avant

qu’ils utilisent l’outil motorisé.

INSTRUCTION MANUAL AND SAFETY INSTRUCTIONS

WARNING

Improper and unsafe use of this power tool can result in death or serious bodily

injury!

This manual contains important information about product safety. Please read

and understand this manual before operating the power tool. Please keep this

manual available for others before they use the power tool.

MANUAL DE INSTRUCCIONES E INSTRUCCIONES DE SEGURIDAD

ADVERTENCIA

¡La utilización inapropiada e insegura de esta herramienta eléctrica puede resultar

en lesiones serias o en la muerte!

Este manual contiene información importante sobre la seguridad del producto.

Lea y comprenda este manual antes de utilizar la herramienta eléctrica. Guarde

este manual para que puedan leerlo otras personas antes de que utilicen la

herramienta eléctrica.

WH22

English

2

CONTENTS

English

Page

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

MEANINGS OF SIGNAL WORDS ...... 3

SAFETY

IMPORTANT SAFETY INSTRUCTIONS

FOR USING ALL POWER TOOLS ......

4

IMPORTANT SAFETY INSTRUCTIONS

FOR USE OF THE IMPACT WRENCH

....

7

REPLACEMENT PARTS ...................... 7

POLARIZED PLUGS ............................ 7

USE OF EXTENSION CORD ............... 8

DOUBLE INSULATION FOR SAFER OPERATION

..... 9

Page

OPERATION AND MAINTENANCE

NAME OF PARTS .............................. 10

SPECIFICATIONS .............................. 10

ACCESSORIES .................................. 11

STANDARD ACCESSORIES ......... 11

OPTIONAL ACCESSORIES ........... 11

APPLICATIONS ................................. 12

PRIOR TO OPERATION ..................... 13

HOW TO USE .................................... 14

OPERATIONAL CAUTIONS .............. 14

MAINTENANCE AND INSPECTION

.... 16

SERVICE AND REPAIRS ................... 17

PARTS LIST ....................................... 50

Français

Page

INFORMATIONS IMPORTANTES .... 18

SIGNIFICATION DES MOTS D’AVERTISSEMENT

.. 18

SECURITE

CONSIGNES DE SECURITE IMPORTANTES POUR

L’UTILISATION DE TOUS LES OUTILS ELECTRIQUES

...

19

CONSIGNES DE SECURITE IMPORTANTES

POUR L’UTILISATION DU CLÉ À CHOC

.... 23

PIECES DE RECHANGE .................... 23

FICHE POLARISEES .......................... 23

UTILISATION D'UN CORDON DE RALLONGE

.. 24

DOUBLE ISOLATION POUR UN

FONCTIONNEMENT PLUS SUR

........ 25

Page

UTILISATION ET ENTRETIEN

NOM DES PIECES ............................. 26

SPECIFICATIONS .............................. 26

ACCESSOIRES .................................. 27

ACCESSOIRES STANDARD ......... 27

ACCESSOIRES EN OPTION .......... 27

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

AVANT L’UTILISATION .................... 29

UTILISATION .......................................

30

PRECAUTIONS POUR L’UTILISATION

.. 30

ENTRETIEN ET INSPECTION ........... 32

ENTRETIEN ET REPARATION .......... 33

LISTE DES PIECES ............................ 50

ÍNDICE

Español

Página

INFORMACIÓN IMPORTANTE ......... 34

SIGNIFICADO DE LAS PALABRAS DE SEÑALIZACIÓN

.. 34

SEGURIDAD

INSTRUCCIONES IMPORTANTES DE SEGURIDAD PARA

UTILIZACIÓN DE TODAS LAS HERRAMIENTAS ELÉCTRICAS

.. 35

INSTRUCCIONES IMPORTANTES DE SEGURIDAD

PARA UTILIZACIÓN DEL LLAVE DE IMPACTO

.... 39

PIEZAS DE REEMPLAZO .................. 39

ENCHUFES POLARIZADOS ............. 39

UTILIZACIÓN DE UN CABLE PROLONGADOR

...... 40

AISLAMIENTO DOBLE PARA OFRECER UNA

OPERACIÓN MÁS SEGURA

................... 41

Página

OPERACIÓN Y MANTENIMIENTO

NOMENCLATURA ............................ 42

ESPECIFICACIONES ......................... 42

ACCESORIOS .................................... 43

ACCESORIOS ESTÁNDAR ............ 43

ACCESORIOS OPCIONALES ........ 43

APLICACIONES ................................. 44

ANTES DE LA OPERACIÓN .............. 45

COMO SE USA .................................. 46

PRECAUCIONES DURANTE LA OPERACION

.... 46

MANTENIMIENTO E INSPECCIÓN..48

MANTENIMIENTO Y REPARACIÓN

... 49

LISTA DE PIEZAS .............................. 50

TABLE DES MATIERES

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3

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 TOOLSaaaa

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

of power tools. To avoid these risks, follow these basic safety instruc-

tions:

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 IMPACT WRENCH

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

of the impact wrench. To avoid these risks, follow these basic safety

instructions:

1. When working in high places, check there is nobody below. During operation, take care

not to catch or tighten the cord accidentally.

2. Use the earplugs if using for a long time use.

3. Switch the reversing switch only after the motor is stopped when it is necessary to change

the direction of the rotation.

4. Use a step up transformer when a long extension cable is used.

5. Confirm the tightening torque by a torque wrench before use in order to ascertain the

correct tightening torque to be used.

6. Attach the hex. socket securely onto the anvil. If the hex. socket is insufficiently secured,

it may drop out and cause an accident. For hex. socket attachment refer to "PRIOR TO

OPERATION" on page 13.

7. Confirm whether the socket has any crack in it.

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 – 618 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:

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.

SAVE THESE INSTRUCTIONS

AND

MAKE THEM AVAILABLE TO

OTHER USERS OF THIS TOOL!

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SPECIFICATIONS

Model WH14 WH16 WH22

Motor Single-Phase, Series Commutator Motor

Power Source Single-Phase, 115V AC 60Hz

Current 4A 5A 10A

No-Load Speed 2100rpm 1700rpm 1600rpm

Capacities

3/8" – 5/8" (M10 – M16) 3/8" – 5/8" (M10 – M16) 5/8" – 7/8" (M16 – M22)

147 ft-lbs (20 kg-m) 220 ft-lbs (30 kg-m) 440 ft-lbs (60 kg-m)

Tightening tightening tightening tightening

Torque M16 × 55 (F10T) M16 × 55 (F10T) M22 × 70 (F10T)

(high strength bolt) (high strength bolt) (high strength bolt)

Square Drive 1/2" (12.7 mm) 1/2" (12.7 mm) 3/4" (19 mm)

Weight 5.1 lbs (2.3 kg) 6.4 lbs (2.9 kg) 11 lbs (5 kg)

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

Fig. 1

Cap Cover

........

Nameplate

Side handle

Anvil

Switch

(WH22)

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ACCESSORIES

WARNING: Accessories for this power tool are mentioned in this Instruction

Manual.

The use of any other attachment or accessory can be dangerous and

could cause injury or mechanical damage.

STANDARD ACCESSORIES

䡬 WH22: (1) Side handle (Code No. 985280) ...................................................................... 1

(2) Hex. socket 32 mm (including pin and ring) (Code No. 874523).................. 1

(3) Case (Code No. 319896) .................................................................................. 1

OPTIONAL ACCESSORIES....... sold separately

1. Variety of sockets

Although the Hitachi Impact Wrench is

delivered with only one standard socket,

ample sockets are available to cover

impact tightening of various sizes and

types of bolts.

S

D

B

E

L

(1) WH14, WH16:

Table 1 B = 1/2" (12.7 mm)

Socket

Ordinary Socket Long Socket

Designation

Dimension (mm) Dimension (mm)

Hex. Socket

12

13

14

17

19

21

22

23

24

26

27

30

S

14

17

19

21

22

23

24

26

27

30

D

25

28

32

35

36

38

42

E

24

15

17

19

24

25

24

34

L

40

32

34

36

40

50

S

12

13

14

17

19

21

22

23

24

26

27

30

D

20

21.5

22

25

28

31

32.5

33

34

38

40

42

E

34

57

L

52

75

Code No.

873540

873536

873624

873626

873627

873628

873629

873630

985195

985196

Code No.

955138

955139

955140

955141

955142

955143

955144

955145

955146

955147

955148

985197

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NOTE:

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

APPLICATIONS

䡬 Tightening and loosening various kinds of bolts and nuts

(2) WH22:

Table 2 B = 3/4" (19 mm)

Socket

Ordinary Socket Long Socket

Designation

Dimension (mm) Dimension (mm)

Hex. Socket

22

23

24

26

27

29

30

32

35

36

S

22

23

24

26

27

29

30

32

35

36

D

32

38

40

42

43

45

47

50

52

55

E

32

29

L

60

55

S

23

24

26

27

29

30

32

35

36

D

33

34

38

39

42

43

46

52

55

E

32

57

72

L

60

85

100

Code No.

955031

874527

874528

874529

874530

874531

874532

874523

874533

874534

Code No.

955032

955033

955034

955035

955036

955037

955038

955039

955040

2. Extension bar : Code No. 873633 (WH14, WH16) Code No. 874535 (WH22)

The extension bar is convenient for working in very restricted spaces or when the socket

provided cannot reach the bolt to be tightened.

CAUTION:

When the extension bar is used the tightening torque is reduced slightly compared with

the ordinary socket. So it is necessary to operate the tool a little longer to get the same

torque.

3. Universal joint : Code No. 955135 (WH14) Code No. 955088 (WH22)

The universal joint is convenient for impacting nuts when there is an angle between the

socket and wrench, or when working in a very narrow space.

4. Corner attachment (Model EW-14R) (WH14, WH16)

Use this attachment only when the machine is applied to the nut or bolt at a right angle.

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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.

6. Attacking the side handle

The position of the side handle attached to

the hammer case can be changed by

unscrewing the handle. (Right hand screw)

Turn the handle to the desired position for

the job and secure the handle by screwing

up tight.

7. Mounting the socket

(1) Pin, O-ring type (WH22) (Fig.2)

Select a socket matched to the bolt to be

tightened or loosened. Insert the socket on

the anvil of the wrench, and secure it with

the pin and ring. When removing the socket,

reverse the sequence.

(2) Plunger type (WH14, WH16) (Fig.3)

Align the plunger located in the square

part of the anvil with the hole in the hex.

socket. Then push the plunger, and mount

the hex. socket on the anvil. Check that the

plunger is fully engaged in the hole. When

removing the socket, reverse the sequence.

Fig. 2

Hex. socket

Anvil

Ring

Fig. 3

Hex. socket

Plunger

Anvil

Hole

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14

HOW TO USE

1. Operation of switch (Fig.4)

The switch in this machine functions as a

motor switch and rotational direction

selector switch. When the switch is set to R

indicated on the handle cover, the motor

rotates clockwise to tighten the bolt. When

the switch is set to L, the motor rotates

counterclockwise to loosen the bolt. When

the switch is released, the motor stops.

CAUTION:

Be sure to turn the switch OFF and wait

until the motor completely stops before

changing the direction of wrench

revolution. Switching while the motor is

rotating will result in burning the motor.

2. Tightening and loosening bolts

A hex. socket matching the bolt or nut must first be selected. Then mount the socket on

the anvil, and grip the nut to be tightened with the hex. socket. Holding the wrench in line

with the bolt, press the power switch to impact the nut for several seconds. If the nut is

only loosely fitted to the bolt, the bolt may turn with the nut, therefore preventing proper

tightening. In this case, stop impact on the nut and hold the bolt head with a wrench

before restarting impact, or manually tighten the bolt and nut to prevent them slipping.

OPERATIONAL CAUTIONS

1. Confirm the line voltage (Figs.5, 6, 7,

8 and 9)

The available tightening torque is

influenced by line voltage. Reduced line

voltage lowers the available tightening

torque.

For example, if you use a 115 V type wrench

on a 105 V line the available tightening

torque will be reduced to 70 to 90%. When

extending the power cord, use an extension

cord which is as short as possible. When

the line voltage is low and a long extension

cord is needed a step up transfomer should

be used. The relation between the line

voltage and the tightening torque are

shown in the figures.

0

0246810

10

20

30

(kg-m)

(s)

(WH14)M16 × 55 (F10T)

Switch

Fig. 4

Tightening time

Rating

Tightening torque

Fig. 5

115V

105V

L

R

L

R

English

15

20

0

0246810

30

40

50

60

70

(kg-m)

(s)

(WH22)

M20 × 70 (F10T)

20

0

0246810

30

40

50

60

70

(kg-m)

(s)

M16 × 70 (F10T)

(WH22)

20

10

30

0

0246810121416

40

(kg-m)

(s)

M16 × 55 (F10T)

(WH16)

2. Work at a tightening torque suitable

for the bolt under impact

The optimum tightening torque for nuts

and bolts differs with material and size of

the nuts and bolts. An excessively large

tightening torque for a small bolt may

stretch or break the bolt. The tightening

torque increases proportionally to the

operating time. Use the correct operating

time for the bolt.

3. Selecting the socket to be matched

to the bolt

Be sure to use a socket which is matched to

the bolt to be tightened. Using an improper

socket will result not only in insufficient

tightening but also in damage to the socket

or nut.

A worn or deformed hex. or square-holed

socket will not give an adequate tightness

for fitting to the nut or anvil, consequently

resulting in loss of tightening torque.

Pay attention to wear of socket holes, and

replace before further wear has developes.

Matching socket and bolt sizes are shown

in Tables 1 and 2.

The numerical value of a socket designation

denotes the side-to-side distance (S) of its

hex. hole.

4. Holding the tool

Hold the Impact Wrench firmly with both

hands by the body handle and the side

handle. In this case hold the wrench in line

with the bolt.

It is not necessary to push the wrench very

hard. Hold the wrench with a force just

sufficient to counteract the impact force.

5. Confirm the tightening torque

The following factors contribute to a

reduction of the tightening torque. So

confirm the actual tightening torque

needed by screwing up some bolts before

the job with a hand torque wrench.

Factors affecting the tightening torque are

as follows.

(1) Line voltage:

The tightening torque decreases when the

line voltage becomes low. (See Figs. 5, 6, 7,

8 and 9)

Fig. 6

Fig. 7

Fig. 8

Tightening time

Rating

Tightening torque

Tightening time

Rating

Tightening torque

Tightening time

Rating

Tightening torque

115V

105V

115V

105V

115V

105V

English

16

(2) Operating time:

The tightening torque increases when the

operating time increases. But the tightening

torque does not increase above a certain

value even if the tool is driven for a long

time. (See Figs. 5, 6, 7, 8 and 9)

(3) Diameter of bolt:

The tightening torque differs with the

diameter of the bolt as shown in Figs. 5, 6,

7, 8 and 9. Generally a larger diameter bolt

has a larger tightening torque.

(4) Tightening conditions:

The tightening torque differs according to

the torque ratio; class, and length of bolts

even when bolts with the same size threads

are used. The tightening torque also differs

according to the condition of the surface of

metal through which the bolts are to be

tightened.

(5) Using optional parts:

The tightening torque is reduced a little when an extension bar, universal joint or a long

socket is used.

(6) Clearance of the socket:

A worn or deformed hex. or a square-holed socket will not give an adequate tightness to

the fitting between the nut or anvil, consequently resulting in loss of tightening torque.

Using an improper socket which does not match to the bolt will result in an insufficient

tightening torque. Matching socket and bolt sizes are shown in Tables 1 and 2.

MAINTENANCE AND INSPECTION

WARNING: Be sure to switch power OFF and disconnect the plug from the receptacle

during maintenance and inspection.

1. Inspecting the socket

A worn or deformed hex. or a square-holed socket will not give an adequate tightness to

the fitting between the nut or anvil, consequently resulting in loss of tightening torque.

Pay attention to wear of socket holes periodically, and replace with a new one if needed.

2. Inspecting the mounting screws

Regularly inspect all mounting screws and ensure that they are properly tightened.

Should any of the screws be lossened, retighten them immediately.

WARNING: Using this impact wrench with loosened screws is extremely dangerous.

20

0

0246810

30

40

50

60

70

(kg-m)

(s)

M20 × 70 (F10T)

(WH22)

Tightening torque

Tightening time

Rating

Fig. 9

115V

105V

English

17

0.67" (17mm)

0.24" (6mm)

(WH22)

43

0.47" (12mm)

0.20" (5mm)

(WH14,WH16)

21

3. Inspecting the carbon brushes (Fig. 10)

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.

CAUTION : Using this impact wrench with

a carbon brush which is worn

in excess of the wear limit will

damage the motor.

NOTE: Use HITACHI carbon brush number

indicated in Fig. 10.

4. Replacing carbon brushes

To replace carbon brushes, use a slotted

head screwdriver to disassemble the brush

caps after disassembling the cap covers.

Then remove the carbon brushes together

with the spring.

When assembling, reverse the procedure

for disassembling. In this case assemble

the cap covers after screwing up the brush

caps firmly.

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.

No. of carbon

brush

No. of carbon

brush

Wear limit

Fig. 10

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Item

Part Name

No.

41 Cap Cover

42 Brush Cap

43 Carbon Brush

44 Brush Holder

45A Hex. Socket Set Screw M5 × 8

46 Ball Bearing (608VVMC2EPS2L)

47 Rubber Washer

48 Tail Cover

49 Spling Washer M4

50 Tapping Screw D4 × 16

51 Tapping Screw D4 × 35

52 Washer M4

53 Handle Cover

54 Switch

55 Switch Adapter

56

Machine Screw (W/Washer) M3.5 × 5

57 Switch Holder

67 Plunger

68 Pin Retainer

Item

Part Name

No.

1 Bumper

2 0-Ring (1AP-20)

3 Hammer Case Ass’y

4 Anvil (B) Ass’y

5 Steel Ball D6.35

6 Hammer

7 Spring

8 Spring Seat

9 Steel Ball D3.175

10 Needle Roller

11 Spindle

12 Idle Gear

13 Ring Gear

14A Ball Bearing (6908ZZC2PS2S)

15 Inner Cover

16 Felt Packing

17 Packing Washer

18 Ball Bearing (6000VVCMPS2S)

19 Armature

20 Fan Guide

21 Stator Ass’y

22 Internal Wire

23 HITACHI Label

24A Housing Ass’y

25 Nameplate

29A

Hex. Socket Hd. Bolt (W/Flange) M5 × 45

30 Internal Wire

31 Terminal (A) M3.5

32 Hex. Hd. Tapping Screw D4 × 45

33 Special Washer

36A Tapping Screw (W/Flange) D4 × 16

37 Cord Clip

38 Cord Armor

39 Cord

40 Tapping Screw D4 × 10

Parts are subject to change without any

obligation on the part of the HITACHI due to

improvements.

WH16

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Item

Part Name

No.

1 Bumper

2 0-Ring (1AP-28)

3A Hammer Case Ass’y

4 Washer (A)

5 Anvil (A)

6 Steel Ball D7.14

7 Hammer

8 Spring

9 Spring Seat

10 Steel Ball D3.97

11 Gear Shaft

12 Spindle (B)

13A Idle Gear Set

14 Clip (A)

15B Ring Gear

16A Ball Bearing (6910ZZC2PS2S)

17 Inner Cover

18 Felt Packing

19 Packing Washer

20 Ball Bearing (6200VVCMPS2S)

21 Armature

22 Fan Guide

23 Stator Ass’y

24 Internal Wire

25 HITACHI Label

26 Collar

27A Housing Ass’y

28 Nameplate

32A

Hex. Socket Hd. Bolt (W/Flange) M5 × 60

33 Hex. Hd. Tapping Screw D5 × 70

34 Special Washer

37

Tapping Screw (W/Washer) D4 × 16

38 Cord Clip

39 Cord Armor

40 Cord

Parts are subject to change without any

obligation on the part of the HITACHI due to

improvements.

WH22

Item

Part Name

No.

41 Internal Wire

42 Terminal (A) M3.5

43 Tapping Screw D4 × 35

44 Washer M4

45A Handle Cover

46 Switch

47 Switch Adapter

48 Machine Screw (W/Washer)

49 Switch Holder

52 Tapping Screw M4 × 10

53 Cap Cover

54 Brush Cap

55 Carbon Brush

56 Brush Holder

57 Hex. Socket Set Screw M5 × 8

58 Ball Bearing (608VVMC2EPS2L)

59 Tail Cover

60 Tapping Screw D5 × 25

501 Hex. Socket Ass’y 32MM × 55L

502 Socket Pin

503 Socket Ring

504 Side Handle Ass’y

505 Side Handle

506 Handle Base

507 Ring

508 Square Bolt M8

509B Case

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103

Code No. 99509264 N

Printed in Japan

WARNING:

Some dust created by power sanding, sawing, grinding, drilling, and other construc-

tion activities contains chemicals known to the State of California to cause cancer,

birth defects or other reproductive harm. Some examples of these chemicals are:

● Lead from lead-based paints,

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

● Arsenic and chromium from chemically-treated lumber.

Your risk from these exposures varies, depending on how often you do this type

of work. To reduce your exposure to these chemicals: work in a well ventilated area,

and work with approved safety equipment, such as those dust masks that are specially

designed to filter out microscopic particles.

AVERTISSEMENT:

La poussière résultant d'un ponçage, d'un sciage, d'un meulage, d'un perçage ou

de toute autre activité de construction renferme des produits chimiques qui sont

connus par l'Etat de Californie pour causer des cancers, des défauts de naissance

et autres anomalies de reproduction. Nous énumérons ci-dessus certains de ces

produits chimiques:

● Plomb des peintres à base de plomb,

● Silice cristalline des briques et du ciment et autres matériaux de maçonnerie, et

● Arsenic et chrome du bois d'oeuvre traité chimiquement.

Le risque d'exposition à ces substances varie en fonction de la fréquence d'exécution

de ce genre de travail. Pour réduire l'exposition à ces produits chimiques, travailler

dans un lieu bien ventilé, et porter un équipement de protection agréé, par exemple

un masque anti-poussière spécialement conçu pour filter les particules microscopiques.

ADVERTENCIA:

Alogunos polvos creados por el lijado mecámico, el aserrado, el esmerilado, el

taladrado y otras actividades de construcción contienen sustancias químicas conocidas

por le Estado de California como agentes cancerígenos, defectos congénitos y otros

daños reproductores. Algunos ejemplos de estas sustancias químicas son:

● El plomo de las pinturas a base de plomo,

● El sílice cristalino de los ladrillos y cemento y otros productos de mampostería, y

● El arsénico y el cromo de la madera tratada químicamente.

El riesgo resultante de la exposición varía según la frecuencia con que se realiza

este tipo de trabajo. Para reducir la exposicíon a esta sustancias químicas: trabaje

en un lugar bien ventilado y realice el trabajo utilizando el equipamiento apropiado,

tal como las máscares para el polvo especialmente diseñados para eliminar las

partículas minúsculas.

Issued by

Shinagawa Intercity Tower A, 15-1, Konan 2-chome,

Minato-ku, Tokyo 108-6020, Japan

Distributed by

3950 Steve Reynolds Blvd.

Norcross, GA 30093

Hitachi Koki Canada Co.

6395 Kestrel Road

Mississauga ON L5T 1Z5

Hitachi WH 22 User manual

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