Stanley IW12 User manual

USER MANUAL
Safety, Operation and Maintenance
IW12
HYDRAULIC
IMPACT WRENCH
© 2014 STANLEY Black & Decker, Inc.
New Britain, CT 06053
U.S.A.
66023 2/2018 Ver. 16

2 ► IW12 User Manual
DECLARATION OF CONFORMITY
ÜBEREINSTIMMUNGS-ERKLARUNG
DECLARATION DE CONFORMITE CEE
DECLARACION DE CONFORMIDAD
DICHIARAZIONE DI CONFORMITA
Hydraulic Tools
______________________________________________________________________
I, the undersigned:
Ich, der Unterzeichnende:
Je soussigné:
El abajo firmante:
lo sottoscritto:
Weisbeck, Andy
Surname and First names/Familiennname und Vornamen/Nom et prénom/Nombre y apellido/Cognome e nome
hereby declare that the equipment specified hereunder:
bestätige hiermit, daß erklaren Produkt genannten Werk oder Gerät:
déclare que l’équipement visé ci-dessous:
Por la presente declaro que el equipo se especifica a continuación:
Dichiaro che le apparecchiature specificate di seguito:
1. Category: Hydraulic Hand Held Impact Wrench
Kategorie:
Catégorie:
Categoria:
Categoria:
2. Make/Marke/Marque/Marca/Marca Stanley
3. Type/Typ/Type/Tipo/Tipo: IW1214001, IW1234001, IW12140AX
4. Serial number of equipment:
Seriennummer des Geräts:
Numéro de série de l’équipement:
Numero de serie del equipo:
Matricola dell´attrezzatura:
All
Has been manufactured in conformity with
Wurde hergestellt in Übereinstimmung mit
Est fabriqué conformément
Ha sido fabricado de acuerdo con
E’ stata costruita in conformitá con
Directive/Standards
Richtlinie/Standards
Directives/Normes
Directriz/Los Normas
Direttiva/Norme
No.
Nr
Numéro
No
n.
Approved body
Prüfung durch
Organisme agréé
Aprobado
Collaudato
ISO
EN ISO
EN
ISO
Machinery Directive
11148-6:2010
3744:2010
28662-7:2009
28927-2:2009
2006/42/EC:2006
Self
Self
Self
Self
Self
5. Special Provisions: None
Spezielle Bestimmungen:
Dispositions particulières:
Provisiones especiales:
Disposizioni speciali:
6. Representative in the Union: Patrick Vervier,Stanley Dubuis 17-19, rue Jules Berthonneau-BP 3406 41034 Blois Cedex, France.
Vertreter in der Union/Représentant dans l’union/Representante en la Union/Rappresentante presso l’Unione
Done at/Ort/Fait à/Dado en/Fatto a Stanley Hydraulic Tools, Milwaukie, Oregon USA Date/Datum/le/Fecha/Data 1-5-11
Signature/Unterschrift/Signature/Firma/Firma
Position/Position/Fonction/Cargo/Posizione Director of Product Development
DECLARATION OF CONFORMITY

IW12 User Manual ◄ 3
TABLE OF CONTENTS
SAFETY SYMBOLS ..................................................................................................................................................4
SAFETY PRECAUTIONS..........................................................................................................................................5
TOOL STICKERS & TAGS ........................................................................................................................................6
HOSE TYPES............................................................................................................................................................7
HOSE RECOMMENDATIONS ..................................................................................................................................8
HTMA / EHTMA REQUIREMENTS ...........................................................................................................................9
OPERATION............................................................................................................................................................10
TOOL PROTECTION & CARE................................................................................................................................12
TROUBLESHOOTING ............................................................................................................................................13
SPECIFICATIONS...................................................................................................................................................14
IW12 PARTS ILLUSTRATION .................................................................................................................................15
IW12 PARTS LIST ..................................................................................................................................................16
IW12 CHANGES / UPDATES TO SPOOL & MAIN HOUSING ..............................................................................17
IW12 CHANGES / UPDATES TO IMPACT MECHANISM .....................................................................................18
STANDARD & HEAVY DUTY MECHANISMS.........................................................................................................20
UNDERWATER TOOLS DEPTH GUIDELINE.........................................................................................................21
SERVICING: This manual contains safety, operation and routine maintenance instructions. STANLEY Infrastructure
recommends that servicing of hydraulic tools, other than routine maintenance, must be performed by an authorized
and certied dealer. Please read the following warning.
To ll out a product warranty validation form, and for information on your warranty,
visit www.stanleyinfrastructure.com and select the Company tab > Warranty.
Note: The warranty validation record must be submitted to validate the warranty.
SERIOUS INJURY OR DEATH COULD RESULT FROM THE IMPROPER REPAIR OR
SERVICE OF THIS TOOL.
REPAIRS AND / OR SERVICE TO THIS TOOL MUST ONLY BE DONE BY AN
AUTHORIZED AND CERTIFIED DEALER.
For the nearest certied dealer, call STANLEY Infrastructure at [phone] and ask for a Customer Service Representative.

4 ► IW12 User Manual
Always observe safety symbols. They are included for your safety and for the protection of the tool.
LOCAL SAFETY REGULATIONS
Enter any local safety regulations here. Keep these instructions in an area accessible to the operator and
maintenance personnel.
Safety symbols and signal words, as shown below, are used to emphasize all operator, maintenance and repair
actions which, if not strictly followed, could result in a life-threatening situation, bodily injury or damage to equipment.
This is the safety alert symbol. It is used to alert you to potential personal injury
hazards. Obey all safety messages that follow this symbol to avoid possible
injury or death.
This safety alert and signal word indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
This safety alert and signal word indicates a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
This safety alert and signal word indicates a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
This signal word indicates a potentially hazardous situation which, if not avoided,
may result in property damage.
This signal word indicates a situation which, if not avoided, will result in damage
to the equipment.
This signal word indicates a situation which, if not avoided, may result in damage
to the equipment.
SAFETY SYMBOLS

IW12 User Manual ◄ 5
Always observe safety symbols. They are included for your safety and for the protection of the tool.
LOCAL SAFETY REGULATIONS
Enter any local safety regulations here. Keep these instructions in an area accessible to the operator and
maintenance personnel.
Safety symbols and signal words, as shown below, are used to emphasize all operator, maintenance and repair
actions which, if not strictly followed, could result in a life-threatening situation, bodily injury or damage to equipment.
This is the safety alert symbol. It is used to alert you to potential personal injury
hazards. Obey all safety messages that follow this symbol to avoid possible
injury or death.
This safety alert and signal word indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
This safety alert and signal word indicates a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
This safety alert and signal word indicates a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
This signal word indicates a potentially hazardous situation which, if not avoided,
may result in property damage.
This signal word indicates a situation which, if not avoided, will result in damage
to the equipment.
This signal word indicates a situation which, if not avoided, may result in damage
to the equipment.
Tool operators and maintenance personnel must always
comply with the safety precautions given in this manual
and on the stickers and tags attached to the tool and
hose. These safety precautions are given for your
safety. Review them carefully before operating the tool
and before performing general maintenance or repairs.
Supervising personnel should develop additional
precautions relating to the specic work area and local
safety regulations. If so, place the added precautions in
the space provided on in this manual.
The model IW12 Hydraulic Impact Wrench will provide
safe and dependable service if operated in accordance
with the instructions given in this manual. Read and
understand this manual and any stickers and tags
attached to the tool and hose before operation.
Failure to do so could result in personal injury or
equipment damage.
• The operator must start in a work area without
bystanders. Flying debris can cause serious injury.
• Do not operate the tool unless thoroughly trained
or under the supervision of an instructor. Establish
a training program for all operators to ensure safe
operation.
• Always wear safety equipment such as goggles,
gloves, ear, head and breathing protection and
safety shoes at all times when operating the tool.
Use gloves and aprons when necessary.
• Inspect tool daily for loose fasteners, missing parts
and leakage. Have tool repaired if necessary.
• The operator must be familiar with all prohibited work
areas such as excessive slopes and dangerous
terrain conditions.
• Maintain proper footing and balance at all times and
do not overreach.
• Do not inspect or clean the tool while the hydraulic
power source is connected. Accidental engagement
of the tool can cause serious injury. Be observant of
hydraulic and water hose lying about the work area,
as they can be a tripping hazard.
• Always connect hoses to the tool hose couplers
before energizing the hydraulic power source. Be
sure all hose connections are tight and are in good
condition.
• Do not operate the tool at oil temperatures above
140 °F/60 °C. Operation at higher temperatures can
cause higher than normal temperatures at the tool
which can result in operator discomfort.
• Do not operate a damaged, improperly adjusted or
incompletely assembled impact wrench.
• Never wear loose clothing that can get entangled in
the working parts of the tool.
• Keep all parts of your body away from the rotating
parts. Long hair or loose clothing can become drawn
into rotating components.
• Always use accessories that conform to the
specications given in “Specications” on page
14.
• Do not reverse impact wrench rotation direction by
changing uid ow direction.
• Release the trigger if the power supply has been
interrupted.
• When working near electrical conductors, always
assume that all conductors are energized and that
insulation, clothing and hoses can conduct electricity.
Use hose certied and labeled as non-conductive.
• To avoid personal injury or equipment damage,
all tool repair, maintenance and service must only
be performed by authorized and properly trained
personnel.
• Serious injury or death could result from a tool or
accessories dropped from an elevated height.
• Warning: Hydraulic uid under pressure could
cause skin injection injury. If you are injured by
hydraulic uid, get medical attention immediately.
• During operation do not contact the impact
mechanism, accessories or hardware as they can
become very hot; use your Personal Protection
Equipment (PPE).
• Warning: Use of this tool on certain materials could
generate dust potentially containing a variety of
hazardous substances such as asbestos, silica or
lead. Inhalation of dust containing these or other
hazardous substances could result in serious
injury, cancer or death. Protect yourself and those
around you. Research and understand the materials
you are cutting. Follow correct safety procedures
and comply with all applicable national, state or
provisional health and safety regulations relating to
them, including, if appropriate arranging for the safe
disposal of the materials by a qualied person.
SAFETY PRECAUTIONS

6 ► IW12 User Manual
The safety tag (P/N 15875) at right is
attached to the tool when shipped from the
factory. Read and understand the safety
instructions listed on this tag before removal.
We suggest you retain this tag and attach it
to the tool when not in use.
NOTE:
THE INFORMATION LISTED ON
THE STICKERS SHOWN, MUST
BE LEGIBLE AT ALL TIMES.
REPLACE DECALS IF
THEY BECOME WORN OR
DAMAGED. REPLACEMENTS
ARE AVAILABLE FROM
YOUR LOCAL STANLEY
DISTRIBUTOR.
28323
CE DECAL (CE)
11207
CIRCUIT TYPE D
DECAL (CE)
D
30 LPM @ 138 BAR
EHTMA CATEGORY
73683
IW12 NAME TAG (US & CE)
Failure to use hydraulic hose labeled and certified
as non-conductive when using hydraulic toolson
or near electric lines mayresultin deathor
Forproper and safe operationread ownersmanual
and mwke surethat you have been properly
trained in correct procedures required for work
serious injury.
on or around electric lines.
ELECTROCUTION
HAZARD
DANGER
12412
DANGER DECAL
29083
ROTATION DIRECTION
DECAL
29530
SOUND POWER
LEVEL DECAL (CE)
Lwa
03788
GPM DECAL
4-12 GPM / 15-45 LPM
DO NOT EXCEED 2000 PSI / 140 BAR
DO NOT EXCEED SPECIFIED FLOW OR PRESSURE USE
CLOSED-CENTER TOOL ON CLOSED-CENTER SYSTEM.
USE OPEN-CENTER TOOL ON OPEN-CENTER SYSTEM.
CORRECTLY CONNECT HOSES TO TOOL ‘IN’ AND ‘OUT’
PORTS. IMPROPER HANDLING,USE OR OTHER MAINTE-
NANCE OF TOOL COULD RESULT IN A LEAK OR BURST OR
OTHER TOOL FAILURE. CONTACT AT A LEAK OR BURST
CAN CAUSE OIL INJECTION INTO THE BODY. FAILURE TO
OBSERVE THESE PRECAUTIONS CAN RESULT IN SERIOUS
PERSONAL INJURY.
SAFETY TAG P/N 15875 (Shown smaller then actual size)
DANGERDANGER
READ OPERATION MANUAL AND
SAFETY INSTRUCTIONS FOR THIS
TOOL BEFORE USING IT.
USE ONLY PARTS AND REPAIR
PROCEDURES APPROVED BY
STANLEY AND DESCRIBED IN THE
OPERATION MANUAL.
TAG TO BE REMOVED ONLY BY
TOOL OPERATOR.
SEE OTHER SIDE
1. FAILURE TO USE HYDRAULIC HOSE LABELED AND CER-
TIFIED AS NON-CONDUCTIVE WHEN USING HYDRAULIC
TOOLS ON OR NEAR ELECTRICAL LINES MAY RESULT IN
DEATH OR SERIOUS INJURY.
BEFORE USING HOSE LABELED AND CERTIFIED AS NON-
CONDUCTIVE ON OR NEAR ELECTRIC LINES BE SURE THE
HOSE IS MAINTAINED AS NON-CONDUCTIVE. THE HOSE
SHOULD BE REGULARLY TESTED FOR ELECTRIC CUR-
RENT LEAKAGE IN ACCORDANCE WITH YOUR SAFETY
DEPARTMENT INSTRUCTIONS.
2. A HYDRAULIC LEAK OR BURST MAY CAUSE OIL INJEC-
TION INTO THE BODY OR CAUSE OTHER SEVERE
PERSONAL INJURY.
A. DO NOT EXCEED SPECIFIED FLOW AND PRESSURE
FOR THIS TOOL. EXCESS FLOW OR PRESSURE MAY
CAUSE A LEAK OR BURST.
B. DO NOT EXCEED RATED WORKING PRESSURE OF
HYDRAULIC HOSE USED WITH THIS TOOL. EXCESS
PRESSURE MAY CAUSE A LEAK OR BURST.
C. CHECK TOOL HOSE COUPLERS AND CONNECTORS
DAILY FOR LEAKS. DO NOT FEEL FOR LEAKS WITH
YOUR HANDS. CONTACT WITH A LEAK MAY RESULT
IN SEVERE PERSONAL INJURY.
IMPORTANT
D. DO NOT LIFT OR CARRY TOOL BY THE HOSES. DO
NOT ABUSE HOSE. DO NOT USE KINKED, TORN OR
DAMAGED HOSE.
3. MAKE SURE HYDRAULIC HOSES ARE PROPERLY CON-
NECTED TO THE TOOL BEFORE PRESSURING SYSTEM.
SYSTEM PRESSURE HOSE MUST ALWAYS BE CON-
NECTED TO TOOL “IN” PORT. SYSTEM RETURN HOSE
MUST ALWAYS BE CONNECTED TO TOOL “OUT” PORT.
REVERSING CONNECTIONS MAY CAUSE REVERSE
TOOL OPERATION WHICH CAN RESULT IN SEVERE
PERSONAL INJURY.
4. DO NOT CONNECT OPEN-CENTER TOOLS TO CLOSED-
CENTER HYDRAULIC SYSTEMS. THIS MAY RESULT IN
LOSS OF OTHER HYDRAULIC FUNCTIONS POWERED BY
THE SAME SYSTEM AND/OR SEVERE PERSONAL INJURY.
5. BYSTANDERS MAY BE INJURED IN YOUR WORK AREA.
KEEP BYSTANDERS CLEAR OF YOUR WORK AREA.
6. WEAR HEARING, EYE, FOOT, HAND AND HEAD PRO-
TECTION.
7. TO AVOID PERSONAL INJURY OR EQUIPMENT DAMAGE,
ALL TOOL REPAIR MAINTENANCE AND SERVICE MUST
ONLY BE PERFORMED BY AUTHORIZED AND PROPERLY
TRAINED PERSONNEL.
IMPORTANT
READ OPERATION MANUAL AND
SAFETY INSTRUCTIONS FOR THIS
TOOL BEFORE USING IT.
USE ONLY PARTS AND REPAIR
PROCEDURES APPROVED BY
STANLEY AND DESCRIBED IN THE
OPERATION MANUAL.
TAG TO BE REMOVED ONLY BY
TOOL OPERATOR.
SEE OTHER SIDE
28788
Manual
Sticker
TOOL STICKERS & TAGS
73680 RAILROAD HELP
DESK DECAL

IW12 User Manual ◄ 7
The rated working pressure of the hydraulic hose must be equal to or higher than the relief valve setting on the
hydraulic system. There are three types of hydraulic hose that meet this requirement and are authorized for use with
STANLEY hydraulic tools. They are:
Certi ed non-conductive — constructed of thermoplastic or synthetic rubber inner tube, synthetic  ber braid
reinforcement, and weather resistant thermoplastic or synthetic rubber cover. Hose labeled certifi ed non-
conductive is the only hose authorized for use near electrical conductors.
Wire-braided (conductive) — constructed of synthetic rubber inner tube, single or double wire braid
reinforcement, and weather resistant synthetic rubber cover. This hose is conductive and must never be used
near electrical conductors.
Fabric-braided (not certi ed or labeled non-conductive) — constructed of thermoplastic or synthetic rubber
inner tube, synthetic  ber braid reinforcement, and weather resistant thermoplastic or synthetic rubber cover.
This hose is not certifi ed non-conductive and must never be used near electrical conductors.
HOSE SAFETY TAGS
To help ensure your safety, the following DANGER tags are attached to all hose purchased from STANLEY. DO
NOT REMOVE THESE TAGS.
If the information on a tag is illegible because of wear or damage, replace the tag immediately. A new tag may be
obtained from your STANLEY Distributor.
THE TAG SHOWN BELOW IS ATTACHED TO “CERTIFIED NON-CONDUCTIVE” HOSE
THE TAG SHOWN BELOW IS ATTACHED TO “CONDUCTIVE” HOSE.
(Shown smaller than actual size)
SIDE 1
DANGER
1. FAILURE TO USE HYDRAULIC HOSE LABELED AND CERTIFIED AS NON-CONDUCTIVE
WHEN USING HYDRAULIC TOOLS ON OR NEAR ELECTRIC LINES MAY RESULT IN
DEATH OR SERIOUS INJURY.
FOR PROPER AND SAFE OPERATION MAKE SURE THAT YOU HAVE BEEN PROPERLY
TRAINED IN CORRECT PROCEDURES REQUIRED FOR WORK ON OR AROUND
ELECTRIC LINES.
2. BEFORE USING HYDRAULIC HOSE LABELED AND CERTIFIED AS NON-CONDUCTIVE
ON OR NEAR ELECTRIC LINES. WIPE THE ENTIRE LENGTH OF THE HOSEAND FITTING
WITH A CLEAN DRY ABSORBENT CLOTH TO REMOVE DIRT AND MOISTURE AND TEST
HOSE FOR MAXIMUM ALLOWABLE CURRENT LEAKAGE IN ACCORDANCE WITH SAFETY
DEPARTMENT INSTRUCTIONS.
SEE OTHER SIDE
SIDE 2
DO NOT REMOVE THIS TAG
3. DO NOT EXCEED HOSE WORKING PRESSURE OR ABUSE HOSE. IMPROPER USE
OR HANDLING OF HOSE COULD RESULT IN BURST OR OTHER HOSE FAILURE.
KEEP HOSE AS FAR AWAY AS POSSIBLE FROM BODY AND DO NOT PERMIT DIRECT
CONTACT DURING USE. CONTACT AT THE BURST CAN CAUSE BODILY INJECTION
AND SEVERE PERSONAL INJURY.
4. HANDLE AND ROUTE HOSE CAREFULLY TO AVOID KINKING, ABRASION, CUTTING, OR
CONTACT WITH HIGH TEMPERATURE SURFACES. DO NOT USE IF KINKED. DO NOT
USE HOSE TO PULL OR LIFT TOOLS, POWER UNITS, ETC.
5. CHECK ENTIRE HOSE FOR CUTS CRACKS LEAKS ABRASIONS, BULGES, OR DAM-
AGE TO COUPLINGS IF ANY OF THESE CONDITIONS EXIST, REPLACE THE HOSE
IMMEDIATELY. NEVER USE TAPE OR ANY DEVICE TO ATTEMPT TO MEND THE HOSE.
6. AFTER EACH USE STORE IN A CLEAN DRY AREA.
SEE OTHER SIDE
DANGER
DO NOT REMOVE THIS TAG
DANGER
(Shown smaller than actual size)
SIDE 2
5. CHECK ENTIRE HOSE FOR CUTS CRACKS LEAKS ABRASIONS, BULGES, OR DAMAGE TO
COUPLINGS IF ANY OF THESE CONDITIONS EXIST, REPLACE THE HOSE IMMEDIATELY.
NEVER USE TAPE OR ANY DEVICE TO ATTEMPT TO MEND THE HOSE.
6. AFTER EACH USE STORE IN A CLEAN DRY AREA.
DANGER
DO NOT REMOVE THIS TAG
DANGER
SIDE 1
1. DO NOT USE THIS HYDRAULIC HOSE ON OR NEAR ELECTRIC LINES. THIS HOSE IS
NOT LABELED OR CERTIFIED AS NON-CONDUCTIVE. USING THIS HOSE ON OR NEAR
ELECTRICAL LINES MAY RESULT IN DEATH OR SERIOUS INJURY.
2. FOR PROPER AND SAFE OPERATION MAKE SURE THAT YOU HAVE BEEN PROPERLY
TRAINED IN CORRECT PROCEDURES REQUIRED FOR WORK ON OR AROUND ELEC-
TRIC LINES.
3. DO NOT EXCEED HOSE WORKING PRESSURE OR ABUSE HOSE. IMPROPER USE OR
HANDLING OF HOSE COULD RESULT IN BURST OR OTHER HOSE FAILURE. KEEP HOSE
AS FAR AWAY AS POSSIBLE FROM BODY AND DO NOT PERMIT DIRECT CONTACT
DURING USE. CONTACT AT THE BURST CAN CAUSE BODILY INJECTION AND SEVERE
PERSONAL INJURY.
4. HANDLE AND ROUTE HOSE CAREFULLY TO AVOID KINKING, CUTTING, OR CONTACT
WITH HIGH TEMPERATURE SURFACES. DO NOT USE IF KINKED. DO NOT USE HOSE TO
PULL OR LIFT TOOLS, POWER UNITS, ETC.
DO NOT REMOVE THIS TAG
DANGER
SEE OTHER SIDE SEE OTHER SIDE
HOSE TYPES

8 ► IW12 User Manual
Oil Flow Hose Lengths Inside Diameter USE
(Press/Return)
Min. Working Pressure
GPM LPM FEET METERS INCH MM PSI BAR
Certi ed Non-Conductive Hose - Fiber Braid - for Utility Bucket Trucks
4-9 15-34 up to 10 up to 3 3/8 10 Both 2250 155
Conductive Hose - Wire Braid or Fiber Braid -DO NOT USE NEAR ELECTRICAL CONDUCTORS
4-6 15-23 up to 25 up to 7.5 3/8 10 Both 2500 175 4-6 15-23 26-100 7.5-30 1/2 13 Both 2500 175
5-10.5 19-40 up to 50 up to 15 1/2 13 Both 2500 175
5-10.5 19-40 51-100 15-30 5/8 16 Both 2500 175 5-10.5 19-40 100-300 30-90 5/8 16 Pressure 2500 175
3/4 19 Return 2500 175
10-13 38-49 up to 50 up to 15 5/8 16 Both 2500 175 10-13 38-49 51-100 15-30 5/8 16 Pressure 2500 175
3/4 19 Return 2500 175
10-13 38-49 100-200 30-60 3/4 19 Pressure 2500 175
1 25.4 Return 2500 175
13-16 49-60 up to 25 up to 8
5/8 16 Pressure 2500 175 3/4 19 Return 2500 175
13-16 49-60 26-100 8-30
3/4 19 Pressure 2500 175
1 25.4 Return 2500 175
Figure 1. Typical Hose Connections
Tool to Hydraulic Circuit Hose Recommendations The chart to the right shows recommended minimum hose diameters for various hose lengths based on gallons per minute (GPM)/liters per minute (LPM). These recommendations are intended to keep return line pressure (back pressure) to a minimum acceptable level to ensure maximum tool performance. This chart is intended to be used for hydraulic tool applications only based on STANLEY tool operating requirements and should not be used for any other applications. All hydraulic hose must have at least a rated minimum working pressure equal to the maximum hydraulic system relief valve setting. All hydraulic hose must meet or exceed speci cations as set forth by SAE J517.
PRESSURE
RETURN
<<< FLOW
FLOW >>>
HOSE RECOMMENDATIONS

IW12 User Manual ◄ 9
HTMA / EHTMA REQUIREMENTS
TOOL TYPE
HTMA
HYDRAULIC SYSTEM REQUIREMENTS TYPE I TYPE II TYPE RR TYPE III
Flow range 4-6 GPM
(15-23 LPM)
7-9 GPM
(26-34 LPM)
9-10.5 GPM
(34-40 LPM)
11-13 GPM
(42-49 LPM)
Nominal operating pressure
(At the power supply outlet)
1500 psi
(103 bar)
1500 psi
(103 bar)
1500 psi
(103 bar)
1500 psi
(103 bar)
System relief valve setting
(At the power supply outlet)
2100-2250 psi
(145-155 bar)
2100-2250 psi
(145-155 bar)
2200-2300 psi
(152-159 bar)
2100-2250 psi
(145-155 bar)
Maximum back pressure
(At tool end of the return hose)
250 psi
(17 bar)
250 psi
(17 bar)
250 psi
(17 bar)
250 psi
(17 bar)
Measured at a max  uid viscosity of:
(At minimum operating temperature)
400 ssu*
(82 centistokes)
400 ssu*
(82 centistokes)
400 ssu*
(82 centistokes)
400 ssu*
(82 centistokes)
Temperature: Suf cient heat rejection capacity to limit
maximum  uid temperature to:
(At maximum expected ambient temperature)
140° F
(60° C)
140° F
(60° C)
140° F
(60° C)
140° F
(60° C)
Minimum cooling capacity at a temperature difference of
between ambient and  uid temps
3 hp
(2.24 kW)
40° F
(22° C)
5 hp
(3.73 kW)
40° F
(22° C)
6 hp
(5.22 kW)
40° F
(22° C)
7 hp
(4.47 kW)
40° F
(22° C)
NOTE: Do not operate the tool at oil temperatures above 140° F (60° C). Operation at higher temperatures can cause operator
discomfort at the tool.
Filter minimum full- ow  ltration 25 microns 25 microns 25 microns 25 microns
Sized for  ow of at least:
(For cold temp startup and maximum dirt-holding capacity)
30 GPM
(114 LPM)
30 GPM
(114 LPM)
30 GPM
(114 LPM)
30 GPM
(114 LPM)
Hydraulic  uid, petroleum based (premium grade, anti-
wear, non-conductive) Viscosity (at minimum and maximum
operating temps)
100-400 ssu
(20-82
centistokes)
100-400 ssu
(20-82
centistokes)
100-400 ssu
(20-82
centistokes)
100-400 ssu
(20-82
centistokes)
NOTE: When choosing hydraulic  uid, the expected oil temperature extremes that will be experienced in service determine the most
suitable temperature viscosity characteristics. Hydraulic  uids with a viscosity index over 140 will meet the requirements over a wide
range of operating temperatures.
*SSU = Saybolt Seconds Universal
CLASSIFICATION
EHTMA
HYDRAULIC SYSTEM
REQUIREMENTS BCD
Flow range
3.5-4.3 GPM
(13.5-16.5
LPM)
4.7-5.8 GPM
(18-22 LPM)
7.1-8.7 GPM
(27-33 LPM)
9.5-11.6 GPM
(36-44 LPM)
11.8-14.5 GPM
(45-55 LPM)
Nominal operating pressure
(At the power supply outlet)
1870 psi
(129 bar)
1500 psi
(103 bar)
1500 psi
(103 bar)
1500 psi
(103 bar)
1500 psi
(103 bar)
System relief valve setting
(At the power supply outlet)
2495 psi
(172 bar)
2000 psi
(138 bar)
2000 psi
(138 bar)
2000 psi
(138 bar)
2000 psi
(138 bar)
NOTE: These are general hydraulic system requirements. See tool speci cation page for tool speci c requirements.
HTMA / EHTMA REQUIREMENTS

10 ► IW12 User Manual
WRENCH TORQUE INFORMATION
FACTORS THAT AFFECT TORQUE
An impact wrench is a rotary hammer that impacts the
head of a bolt or nut. It does not apply a slow steady
torque like a standard torque wrench. Therefore, several
factors affect the result of torque when using impact
wrenches:
1. LONG BOLTS: Long bolts having high-friction
threads with lubrication under the bolt head or
associated nut can twist when impacted, then
untwist before the next impact. This will especially
happen if there is low friction between the bolt head
or nut and the mating surface.
2. HEAVY, LOOSE OR MULTIPLE ADAPTERS:
Heavy, loose or multiple adapters between the
wrench and socket can dissipate the intensity of the
impact to the bolt head or nut.
3. AMOUNT OF IMPACT: Maximum torque results
can be obtained by allowing continuous impacting
of the socket against the bolt head or nut for at least
10 seconds.
4. HYDRAULIC FLOW RATE: If the ow rate to the
tool is too low, the hammer (or impact) speed is
reduced. If the ow is correct, a change in the relief
pressure does not affect the impact force. Poorly
designed hydraulic circuits can result in lower ow
rates and reduced impact speeds when pressure is
required during impacting.
BOLT GRADE AND THREAD
RECOMMENDATIONS
Allowable bolt torque is limited by both bolt thread
diameter and grade of steel in the bolt. The IW12 Impact
Wrench is recommended for use on the following bolt
grade and thread sizes:
SAE Grade 2 1 to 1-1/2 inch / 25/38 mm
SAE Grade 5 3/4 to 1-1/4 inch / 19-32 mm
SAE Grade 8 5/8 to 1 inch / 16-25 mm
PREPARATION PROCEDURES
CHECK POWER SOURCE
1. Using a calibrated ow meter and pressure gauge,
check that the hydraulic power source develops a
ow of 4–12 GPM/15-45 LPM at 1000–2000 psi/70-
140 bar.
2. Make certain that the hydraulic power source is
equipped with a relief valve set to open at 2100
psi/145 bar minimum.
CONNECT HOSES
1. Wipe all hose couplers with a clean, lint-free cloth
before making connections.
2. Connect hoses from the hydraulic power source
to the tool ttings or quick disconnects. It is good
practice to connect the return hose rst and
disconnect it last to minimize or eliminate trapped
pressure within the wrench.
3.
Always use sockets and accessories designed for
impact type applications. DO NOT USE STANDARD
SOCKETS OR ACCESSORIES. THESE CAN
CRACK OR FRACTURE DURING OPERATION.
Observe the ow indicators stamped on the main
body assembly and the hose couplers to ensure that
the ow is in the proper directions. The female
couple on the tools “IN” port is the inlet (pressure)
coupler.
NOTE: If the uncoupled hoses are left in the sun,
pressure increase within the hoses can make them
difcult to connect. Whenever possible, connect the
free ends of hoses together.
WRENCH OPERATION
The IW12 is designed for 3/4-inch square sockets and
accessories. Adapter part number 06790 or equivalent
will permit the use of 5/8-inch quick change drive
attachments.
Normal applications include installation or removal of
fasteners requiring torque in the range of 300–1200 ft
lb/407–1627 Nm and auger bit wood boring. DO NOT
use the wrench as a hammer drill for metal drilling.
During normal operation it is common to see some
grease leakage from around the anvil during hard
use. Refer to the IW12 Service Manual for the correct
lubrication procedures.
1. Observe all Safety Precautions.
2. Move the hydraulic circuit control valve to the “ON”
position to operate the wrench.
3. Select the direction of impact desired using the
rotary reversing valve located on the left side of
the wrench. To select clockwise direction, move the
lever toward the front (drive end) of the wrench. To
select counterclockwise direction, move the lever to
the rear (handle end) of the wrench.
NOTE: To more accurately tighten bolts, lubricate
OPERATION

IW12 User Manual ◄ 11
threads, check with a torque wrench and duplicate
time of impacting for other bolts of the same length
and thread size.
4. Squeeze the trigger to activate the wrench.
5. Release the trigger to stop the wrench.
COLD WEATHER OPERATION
If the wrench is to be used during cold weather, preheat
the hydraulic uid at low engine speed. When using the
normally recommended uids, uid temperature should
be at or above 50 °F/10 °C (400 ssu/82 centistokes)
before use.
Damage to the hydraulic system or wrench can result
from use with uid that is too viscous or thick.
UNDERWATER MODEL PREVENTATIVE
MAINTENANCE
After each use, the movable portions of the tool that
were exposed to water should be ushed with a water
displacing oil, such as WD-40™. Remove any remaining
water and debris as follows:
1. Spray oil throughout all moving parts and any areas
exposed to water.
2. Spray oil into the On/Off valve trigger slot area.
3. Dip or spray the entire tool.
4. Cycle the tool hydraulically several times before
storing away.
POST OPERATION
UNDERWATER MODELS ONLY
The wrench impact mechanism must be cleaned and
greased with waterproof grease after every day of use.
The main housing valve and motor are sealed and do
not require maintenance unless they are malfunctioning.
Remove, clean, grease and assemble the impact
mechanism as described in the IW12 Service Manual.
OPERATION

12 ► IW12 User Manual
• Make sure all couplers are wiped clean before
connection.
• The hydraulic circuit control valve must be in
the “OFF” position when coupling or uncoupling
hydraulic tools. Failure to do so may result in damage
to the quick couplers and cause overheating of the
hydraulic system.
• Always store the tool in a clean dry space, safe from
damage or pilferage.
• Make sure the circuit PRESSURE hose (with male
quick disconnect) is connected to the “IN” port. The
circuit RETURN hose (with female quick disconnect)
is connected to the opposite port. Do not reverse
circuit ow. This can cause damage to internal seals.
• Always replace hoses, couplings and other parts
with replacement parts recommended by STANLEY.
Supply hoses must have a minimum working
pressure rating of 2500 psi/172 bar.
In addition to the safety precautions found in
this manual, observe the following for equipment
protection and care.
• Do not exceed the rated ow .See “Specications” on
page 14 for correct ow rate and model number.
Rapid failure of the internal seals may result.
• Always keep critical tool markings, such as warning
stickers and tags, legible.
• Tool repair should be performed by experienced
personnel only.
• Make certain that the recommended relief valves
are installed in the pressure side of the system.
• Do not use the tool for applications for which it was
not intended.
TOOL PROTECTION & CARE

IW12 User Manual ◄ 13
If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem. When
diagnosing faults in operation of the wrench, always check that the hydraulic power source is supplying the correct
hydraulic ow and pressure to the tool as listed in the following table. Use a ow meter known to be accurate. Check
the ow with the hydraulic uid temperature at least 80 °F/27 °C.
PROBLEM CAUSE SOLUTION
Low performance or impact. Incorrect hydraulic ow. Check that the hydraulic power source
is producing 4–12 GPM/15–45 LPM at
1000–2000 psi/70–140 bar.
Defective quick disconnects. Check each quick disconnect.
Worn impact mechanism. Repair or replace the impact
mechanism. See Service Manual.
Hammer pins broken. Replace with integral frame (with
pins). Check relief adjustment screw
setting. Job may require a larger
wrench.
Incorrect grease or periodic
maintenance of the impact
mechanism is not being performed.
See Service Manual.
Spools incorrectly installed. Valve(s) incorrectly reassembled. See
Service Manual.
Sockets or adapters too heavy or
loose.
Use the correct impact type sockets or
adapters.
Long bolt with lubricated head. Lubricate threads only.
Wrench runs too fast. Impact
mechanism or screws broken.
Incorrect hydraulic ow (too high). Check that hydraulic power source is
producing 4-12 GPM/15-45 LPM at
1000-2000 psi/70-140 bar.
Supply and return hoses reversed. Install hoses correctly. Refer to
Operation section in this manual.
Relief sleeve or spring damaged. Remove and replace spool assembly.
Adjusting screw is in too far. Adjust correctly.
Grease leaks at anvil busing,
wrench warm.
Hard duty cycle and heat forces
grease out.
Normal unless greasing instructions in
Service Manual are not followed.
Grease leaks at anvil bushing,
wrench cold.
Main shaft O-ring leaking. Replace as required.
Oil leak at motor cap face. Fasteners loose. Tighten to recommended torque.
Face O-ring worn or missing. Replace as required.
Motor cap/main housing damaged. Replace as required.
Oil leaks at reversing spool. Damaged O-rings. Replace as required. Check Service
Manual to avoid cutting O-rings on
cross holes in the spool bore.
Wrong hydraulic uid. Circuit too
hot.
Refer to Operation section for correct
uid/circuit specications.
TROUBLESHOOTING

14 ► IW12 User Manual
Drive Size ................................................................................... 3/4-inch Square Drive, 5/8-inch Hex Quick Change
Weight (with couplers)..........................................................................................................................16.8 lbs/7.6 kg
Overall Length .................................................................................................................................. 9-1/2-inch/24 cm
Width ...................................................................................................................................................... 4-inch/10 cm
Pressure Range (Input Pressure)......................................................................................1000-2500 psi/70–172 bar
Flow Range ............................................................................................................................ 4–12 GPM/15–45 LPM
Optimum Flow ........................................................................................................................ 5–10 GPM/20–38 LPM
System Type........................................................................................ Open and Closed Center, HTMA Type II or III
Porting ....................................................................................................................................................8 SAE O-ring
Output Speed (free spin) ................................................................................................ 2000 rpm at 5 GPM/19 LPM
Input Speed ......................................................................................................................... 1200 Impacts per Minute
Connect Size and Type .............................................................................................................................FF Coupler
Torque...........................................................................................................................250–1200 ft. lb/340–1632 Nm
SOUND AND VIBRATION DECLARATION
Test conducted on 1212140, S/N 121610100 operated at standard 10 GPM input
Measured A-weighted sound power level, Lwa (ref. 1pW) in decibels 108 dBA
Uncertainty, Kwa, in decibels 3 dBA
Measured A-weighted sound pressure level, Lpa (ref. 20 µPa) at operator’s position, in decibels 95 dBA
Uncertainty, Kpa, in decibels 3 dBA
Values determined according to noise test code given in ISO 15744, using the basic standard
ISO 3744
NOTE: The sum of a measured noise emission value and its associated uncertainty represents
an upper boundary of the range of values which is likely to occur in measurements.
Declared vibration emission value in accordance with EN 12096
Measured vibration emission value (Main Handle): a 10.9 m/sec²
Uncertainty: K 1.2 m/sec²
Measured vibration emission value (Assist Handle): a 11.2 m/sec²
Uncertainty: K 1.2 m/sec²
Values determined according to ISO 28927-2, ISO 5349-1,2
ACCESSORIES
Description Part Number
3/4-inch Square Anvil to 3/4-inch Jacobs Chuck ...............................................................................................01857
5/8-inch Hex Shank ×1/2-inch Square Male Adapter........................................................................................05080
3/4-inch Square Anvil to 5/8-inch Hex Quick Change Adapter ..........................................................................06790
AUGER DRILL BITS – LINEMAN’S STYLE
5/8-inch Hex Shank use with Hex Adapter 06790
5/8 Hex Pole Bit, 9/16 ×21×24 Overall Length ................................................................................................27845
5/8 Hex Pole Bit, 13/16 ×21 ×24 Overall Length .............................................................................................27847
Assist Handle Kit ...............................................................................................................................................71706
SPECIFICATIONS
Adapter Part Number 06790, used to adapt 3/4-inch Square Drive to 5/8-inch Hex Quick
Change.
Adapter P/N 01857, used to adapt 3/4-inch Square Drive to 3/4-inch 3-Jaw Jacobs Chuck.

IW12 User Manual ◄ 15
1
2
3
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27 28
29
30
31
32
33
36
39
40
46
47
50
52
53
55
56
57
4
34
35
37
41
42
43
44
45
48
51
58
59
CLEAN, APPLY
242 LOCTITE®,
AND TORQUE
(8) CAPSCREWS
TO 28–30 FT
LB / 37.9–40.6
NM USING
THE TORQUE
PATTERN
SHOWN AT THE
UPPER LEFT.
IW12 PARTS ILLUSTRATION
49
60

16 ► IW12 User Manual
IW12 PARTS LIST
Item
No.
Part
No. Qty Description
1 00786 1 HSHCS 10-24 X 1-3/4 SST
2 00026 1 O-RING*
3 00145 4 LOCKWASHER 5/16" I.D.
4 00149 1 O-RING *
5 00166 1 RETAINING RING
6 09277 1 HEX NUT 5/16-18UNC SST
7 01870 8 HSHCS 3/8-16 X 1-3/4 SST
8 00717 1 O-RING *
9 00580 1 SETSCREW 1/4-20 X 1/4 SST
10 01211 2 O-RING *
11 01459 8 LOCKWASHER 3/8" I.D.
12 02764 4 HSHCS 5/16-18 X 3/4 SST
12A 02764 2 HSHCS 5/16-18 X 3/4 SST
(IW1234001 ONLY)
13 04939 1 LEVER
14 06533 1 O-RING *
15 07724 1 NYLOCK NUT 10-24UNC SST
16 07982 1 SPRING REST
17 07985 1 COMPRESSION COIL SPRING
18 07986 1 RELIEF SEAT
19 07987 1 BACK-UP WASHER
20 07988 1 COMPRESSION COIL SPRING
21 07989 1 IDLER GEAR ASSY (INCLUDES
ITEM # 59 BUSHING)
22 07991 1 IDLER SHAFT
23 07993 1 RELIEF POPPET
24 07996 1 TRIGGER (USED ON MODELS
IW12140 & IW1234001)
28536 1 TRIGGER (USED ON MOD-
ELS WITH TRIGGERLOCKS
IW1214001) SEE PAGE 17
25 07997 1 MOTOR CAP ASSY
26 08001 1 MAIN SHAFT
27 08002 1 REVERSING SPOOL
28 08015 2 BACK-UP RING *
29 08016 1 RETAINING RING EXTERNAL
09275 1 RETAINING RING EXTERNAL
(IW1234001 ONLY)
30 08017 1 O-RING *
31 08019 2 THRUST WASHER
32 08020 1 THRUST BEARING
33 08023 1 O-RING *
34 08067 1 HAMMER
Item
No.
Part
No. Qty Description
35 08069 2 HAMMER PIN
36 09396 1 BACK-UP RING *
37 09878 1 THRUST BEARING
38 15875 1 WARNING TAG (NOT SHOWN)
39 09612 1 CAUTION STICKER
40 19453 1 RELIEF ADJUSTMENT SCREW
41 20257 1 HAMMER FRAME
42 20258 1 BUSHING
43 20259 1 RETAINER
44 20262 1 RETAINING RING
45 21408 1 THRUST BEARING RACE
46 22063 1 SPOOL CAP
47 22064 1 ROD WIPER *
48 22728 1 ANVIL 3/4 SQ DRIVE
49 35451 1 IMPACT MECHANISM 3/4 SQ
(DOES NOT INCLUDE ITEMS
3, 12 & 39) USED ON BOTH
LAND & UNDERWATER MOD-
ELS. SEE PAGES 17, 18 & 20
FOR MORE INFO.
12783 1 IMPACT MECHANISM U/W
3/4 SQ (DOES NOT INCLUDE
ITEMS 3, 12 & 39) SEE PAGES
17, 18 & 20 FOR MORE INFO.
50 23678 1 HEADED PUSH PIN
51 29087 1 HAMMER CASE
52 58856 1 3/8 FF COUPLER BODY
FEMALE (SET 58718)
03972 1 3/8 FEMALE. 3/8 NPT FLUSH
FACE SET P/N 03971
53 58857 1 3/8 FF COUPLER NOSE MALE
(SET 58718)
03973 1 3/8 MALE. 3/8 NPT FLUSH
FACE SET P/N 03971
55 73046 1 ON/OFF SPOOL-OC SEE
PAGE 17 BEFORE ORDERING
56 73311 1 MAIN HOUSING ASSY, SEE
PAGE 17 BEFORE ORDERING
73312 1 MAIN HOUSING ASSY, SEE
PAGES 17, 18 & 20 FOR
MORE INFO BEFORE ORDER-
ING
57 73683 1 NAME TAG - IW12
58 08014 1 BUSHING (INCL W/ ITEM # 56)
59 07978 1 BUSHING (INCL W/ ITEM # 21)
60 00936 2 ADAPTER
Seal Kit P/N-13695 * Denotes Parts found in seal kit

IW12 User Manual ◄ 17
VALVE SPOOL (ITEM # 55)
The old valve spool (P/N-07998) was replaced with a new valve spool (P/N-73046) in 2012. The new valve spool is
backwards compatible and will work in older main housings. The old valve spool (P/N-07998) is now obsolete and no
longer available.
Old Valve Spool P/N-07998 New Valve Spool P/N-73046
MAIN HOUSING ASSY (ITEM # 56)
New main housing (P/N-73311)
used on all models starting with
serial number 021616114 and
higher.
NOTE: If you have an older IW12 with serial number 111912001 and earlier and you are replacing the main housing
assy shown below, you must purchase both a new valve spool (73046) and a new main housing (73311). The old
valve spool is not compatible with the new main housing design.
73311 Main Housing uses Impact
Mechanism 35451 or older mecha-
nism 22729.
NOTE: The 35451 impact mecha-
nism is now used for both Land and
Underwater applications.
New main housing (P/N-73312)
is a service part for use with the
12783 standard impact mecha-
nism ONLY.
73311
See page 20 to verify if you have
the Standard or Heavy Duty impact
mechanism.
73312
Old main housing (P/N-07999)
used on all models with serial
number 021616113 and lower.
This main housing is obsolete &
no longer available.
07999
IW12 CHANGES / UPDATES TO SPOOL & MAIN HOUSING
This main housing change took place in February 2016
NOTE: If you are replacing the
07999 main housing, you must
purchase both the new valve spool
and new main housing (see NOTE
above).
The only difference
between the 73312
main housing & the
73311 is the 73312
has an additional
step in the housing
that allows for an
O-ring in the loca-
tion shown.

18 ► IW12 User Manual
NOTE: The newer 35451 impact mechanism is now
used for both land and underwater applications.
This impact mechanism is used on all current IW12
models.
IW12 CHANGES / UPDATES TO IMPACT MECHANISM
35451
NOTE: The older 22729 impact mechanism is now
obsolete and no longer available. Use part 35451.
The only difference between 22729 & 35451 mechanisms
is the 35451 has an additional O-ring allowing its use for
land and underwater.
22729
12783
NOTE: If you have an older P/N 12783 - Impact
Mechanism and need to verify whether or not it is the
older standard mechanism, there are two key parts that
are noticeably different.
The Anvil and Hammer Case (Refer to page 20) are
the two parts to help you verify if you have a Standard or
Heavy-Duty mechanism.

IW12 User Manual ◄ 19
MODELS WITH SPECIFIC PARTS
Trigger Lock Models
1
2
3
4
Item
No.
Part
No. Qty Description
1 12285 1 TRIGGER GUARD
2 07724 1 LOCK NUT
3 12470 1 CAPSCREW STNLS
4 36004 2 SPACER
6 02449 2 CAPSCREW STNLS
Trigger Guard Models
1
2
4
6
3
Item
No.
Part
No. Qty Description
1 01652 2 PIGTAIL HOSE ASSY
2 03973 1 COUPLER (MALE)
3 03972 1 COUPLER (FEMALE)
COUPLER SET P/N-03971 (INCLUDES
MALE & FEMALE COUPLERS)

Models With Hose Whips
3
21
Item
No.
Part
No. Qty Description
1 28536 1 TRIGGER
2 01851 1 ROLL PIN
3 27441 1 THUMB LATCH
4 27445 1 TORSION SPRING

20 ► IW12 User Manual
STANDARD IMPACT & HEAVY DUTY IMPACT
MECHANISMS IN DETAIL
STANDARD MECHANISM
HEAVY DUTY MECHANISM
When ordering impact mechanism parts, rst determine which mechanism you have by visually inspecting the
following two parts indicated by the arrows (A: Hammer Case, B: Anvil).
Note the difference in the Hammer
Case (A) when ordering.
NOTE: The Anvil (B) for a Standard Mechanism has
a tab on one end, while the Heavy Duty Anvil has a
round diameter on one end.
AB
AB
55
55
STANDARD & HEAVY DUTY MECHANISMS