900W
1/2” I
IW1000
INSTRUCTION M
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Introduction
Description of symbols
Your new GMC power tool will more than satisfy
your expectations. It has been manufactured under
stringent GMC Quality Standards to meet superior
performance criteria.
The rating plate on your tool may show symbols.
These represent important information about the
product or instructions on its use.
Wear hearing protection.
Wear eye protection.
Wear breathing protection.
You will find your new tool easy and safe to operate,
and, with proper care, it will give you many years
of dependable service.
Double insulated for additional protection.
CAUTION. Carefully read through this entire Instruction
Manual before using your new GMC Power Tool. Take
special care to heed the Cautions and Warnings.
Conforms to relevant standards
for electromagnetic compatibility.
Your GMC power tool has many features that will make
your job faster and easier. Safety, performance, and
dependability have been given top priority in the
development of this tool, making it easy to maintain
and operate.
Specifications
Voltage:
230–240Vac ~ 50Hz
900W
Input power:
Environmental protection
No Load Speed:
Impacts Per Minute:
Net Weight:
2100min-1
2700 IPM
3.4kg
Recycle unwanted materials instead
of disposing of them as waste. All tools,
hoses and packaging should be sorted,
taken to the local recycling centre and
disposed of in an environmentally safe way.
Torque Output:
Max 240ft/lb
3
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e. When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of a cord
suitable for outdoor use reduces the risk of electric shock.
General safety instructions
WARNING. Read all instructions. Failure to follow all
instructions listed below may result in electric shock,
fire and/or serious injury. The term “power tool” in all of
the warnings listed below refers to your mains operated
(corded) power tool or battery operated (cordless) power
tool. Please familiarise yourself fully with the device, and
understand how it works before operating it for the first time.
3. Personal safety
a. Stay alert, watch what you are doing and use
common sense when operating a power tool.
Do not use a power tool while you are tired or under
the influence of drugs, alcohol or medication. A moment
of inattention while operating power tools may result in
serious personal injury.
Save these instructions
ꢀ. Work area
b. Use safety equipment. Always wear eye protection.
Safety equipment such as dust mask, non-skid
safety shoes, hard hat, or hearing protection used for
appropriate conditions will reduce personal injuries.
a. Keep work area clean and well lit. Cluttered and dark
areas invite accidents.
b. 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 or fumes.
c. Avoid accidental starting. Ensure the switch is in the
off position before plugging in. Carrying power tools with
your finger on the switch or plugging in power tools that
have the switch on invites accidents.
c. Keep children and bystanders away while operating a
power tool. Distractions can cause you to lose control.
d. Remove any adjusting key or wrench before turning
the power tool on. A wrench or a key left attached to a
rotating part of the power tool may result in personal injury.
ꢁ. Electrical safety
a. Power tool plugs must match the outlet.
Never modify the plug in any way. Do not use any
adapter plugs with earthed (grounded) power tools.
Unmodified plugs and matching outlets will reduce risk
of electric shock.
e. Do not overreach. Keep proper footing and balance at
all times. This enables better control of the power tool in
unexpected situations.
f. Dress properly. Do not wear loose clothing or
jewellery. Keep your hair, clothing and gloves away from
moving parts. Loose clothes, jewellery or long hair can be
caught in moving parts.
b. Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric
shock if your body is earthed or grounded.
g. If devices are provided for the connection of dust
extraction and collection facilities, ensure these are
connected and properly used. Use of these devices
can reduce dust related hazards.
c. Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electric shock.
d. Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the power tool.
Keep cord away from heat, oil, sharp edges or moving
parts. Damaged or entangled cords increase the risk of
electric shock.
4. Power tool use and care
a. Do not force the power tool. Use the correct power tool
for your application. The correct power tool will do the job
better and safer at the rate for which it was designed.
4
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• Always wear safety glasses and using hearing
protection during operation. Exposure to noise may
cause hearing loss.
b. Do not use the power tool if the switch does not turn
it on and off. Any power tool that cannot be controlled
with the switch is dangerous and must be repaired.
• Do not wear loose fitting clothing and jewellery which
may become caught in moving parts and result in
serious injury.
• Always use impact-quality sockets only. Do not use
handtool sockets, damaged or sockets.
• Always ensure that sockets must be securely attached
prior to use.
• Only use sockets that are in good condition.
c. Disconnect the plug from the power source before
making any adjustments, changing accessories, or
storing power tools. Such preventive safety measures
reduce the risk of starting the power tool accidentally.
d. Store idle power tools out of the reach of children
and do not allow persons unfamiliar with the power
tool or these instructions to operate the power tool.
Power tools are dangerous in the hands of untrained users.
e. Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and any other
condition that may affect the power tools operation. If
damaged, have the power tool repaired before use. Many
accidents are caused by poorly maintained power tools.
• Never trigger the tool when it has not been placed in
applied to a work object.
• Sockets must be correctly attached.
• Disconnect the power supply before installing sockets or
performing any maintenance.
• 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.
f. Keep cutting/scraping tools sharp and clean. Properly
maintained cutting/scraping tools with sharp cutting edges
are less likely to bind and are easier to control.
g. Use the power tool, accessories and tool bits etc.,
in accordance with these instructions and in the
manner intended for the particular type of power
tool, taking into account the working conditions and
the work to be performed. Use of the power tool for
operations different from those intended could result in a
hazardous situation.
• Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electric shock.
• Avoid accidental starting. Check and make sure that the
switch is off before plugging in. When carrying the tool be
careful and pay attention to where you place your hand
and fingers as the switch can invite accidents.
• Do not overreach. Keep proper footing and balance at all
times. Proper footing and balance enables better control
of the tool in unexpected situations.
• Do not use on a ladder or unstable support. Stable
footing on a solid surface enables better control of the
tool in unexpected situations.
• Keep the tool and its handle dry, clean and free from oil
and grease. Always use a clean cloth when cleaning.
Never use brake fluids, gasoline, petroleum based
products, or any strong solvents to clean your tool.
Following this rule will reduce the risk of loss of control
and deterioration of the enclosure plastic.
5. Service
a. Have your power tool serviced by a qualified repair
person using only identical replacement parts. This
will ensure that the safety of the power tool is maintained.
Additional safety rules for impact wrenches
This impact wrench kit is designed for removing and
installing nuts and bolts, and has been designed as a
general purpose tool kit for DIYers and hobbyists.
• Disconnect the impact wrench from the power supply
before changing tools or accessories, servicing and
during non-operation.
5
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• Remove the plug from the socket before carrying out any
adjustment, servicing or maintenance.
If in doubt, do not plug in the tool. Using a power source
with a voltage less than the nameplate rating is harmful to
the motor.
• When an extension cable is required, you must ensure it
has the right ampere rating for your power tool and is in a
safe electrical condition.
The tool must be used only for its prescribed purpose.
Any use other than those mentioned in this Manual will
be considered a case of misuse. The user and not the
manufacturer shall be liable for any damage or injury
resulting from such cases of misuse.
• Fully unwind cable drum extensions to avoid potential
overheating.
• Ensure your mains supply voltage is the same as your
tool rating plate voltage.
To use this tool properly, you must observe the safety
regulations, the assembly instructions and the operating
instructions to be found in this Manual. All persons who use
and service the machine have to be acquainted with this
Manual and must be informed about its potential hazards.
Children and frail people must not use this tool. Children
should be supervised at all times if they are in the area in
which the tool is being used. It is also imperative that you
observe the accident prevention regulations in force in your
area. The same applies for general rules of occupational
health and safety.
• Your tool is double insulated for additional protection
against a possible electrical insulation failure within
the tool.
• Always check walls, floors and ceilings to avoid hidden
power cables and pipes.
• Be careful, after long working periods external metal parts
and accessories could be hot.
• Do not put pressure on the impact wrench, such that it
slows the motor down. Allow the impact wrench socket to
operate without pressure. You will get better results and
you will be taking better care of your tool.
The manufacturer shall not be liable for any changes made
to the tool nor for any damage resulting from such changes.
Even when the tool is used as prescribed it is not possible to
eliminate all residual risk factors. The following hazards may
arise in connection with the tool’s construction and design:
• Always switch off before you put the impact wrench down.
• Ensure that the lighting is adequate.
• Keep the area free of tripping hazards.
• Damage to the lungs if an effective dust mask is
not worn.
• Do not touch the socket after operation. It may be hot.
• Do not let anyone under 18 years operate this tool.
• Damage to hearing if effective ear protectors are
not worn.
• Rags, cloths, cord, string and the like should never be left
around the work area.
Wear goggles
• Support the work properly.
Wear ear muffs
• If you are interrupted when operating the tool, complete
the process and switch off before looking up.
Wear a breathing mask
• Periodically check that all nuts, bolts and other fixings are
properly tightened.
• When using the impact wrench, use safety equipment
including safety glasses or shield, ear protectors, and
protective clothing including safety gloves. Wear a dust
mask if required.
ꢂ
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Contents of carton
• 1/2” Impact wrench
• Kitbox
Assembly
The GMC impact wrench is packed, fully assembled except
for the impact socket. Please select the required impact
socket and insert correctly (refer to the socket change
section of this manual).
• Instruction manual
7
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Know your product
1. Drive Shank
2. Trigger Switch
3. Replaceable Brushes
4. Handle/Grip
3
5. Power Cord
ꢀ
ꢁ
4
5
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Unpacking
Operation
Due to modern mass production techniques, it is unlikely
that your GMC Power Tool is faulty or that a part is missing.
If you find anything wrong, do not operate the tool until the
parts have been replaced or the fault has been rectified.
Failure to do so could result in serious personal injury.
Starting & stopping
1. Check the rating label on
the impact wrench indicates
230V–240V.
2. Plug the cordset into the
mains socket.
Assembly
Installing and Removing Sockets
3. Squeeze the trigger switch (2)
to start the impact wrench.
CAUTION. Always ensure that the impact wrench is
switched off and the plug is removed from the power point
before making any adjustments.
4. Release the trigger switch to
stop the motor.
Use only sockets designed for impact wrenches. Always
select the correct size impact socket for nuts and bolts. Using
the wrong size socket may damage the nut or bolt and cause
the fastening torque to be inaccurate or inconsistent.
CAUTION. Always maintain a tight control of the tool when
switching on and off. Remember the motor will continue to
run for a short time after switching off.
Direction Of Rotation/Forward and Reverse
1. Unplug the wrench.
The impact wrench has a rocker-type trigger switch for
operating the wrench in forward or reverse. To operate
the wrench in the forward direction, depress the lower half
of the switch (2). To operate the wrench in reverse, depress
the upper half of the switch. To stop the wrench, release
the switch trigger and allow the motor to come to a
complete stop.
2. Select the required socket.
3. Firmly push the socket onto the drive shank until the hog
ring locks it into place.
4. To remove the socket, pull it away from the drive shank.
Reverse
Forward
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WARNING. Wear safety goggles, a dust mask and ear
defenders.
Using the impact wrench
The impact wrench can be used for driving nuts and
bolts using an impact socket and is suitable for many
DIY applications.
WARNING. Do not use the impact wrench in wet or
damp conditions.
Operating the Impact Wrench
Trouble shooting
Correct fastening torque may be determined by the kind
of bolt, the size of the bolt or the material of the workpiece.
Trouble
Problem
Suggested remedy
Ensure that the cord
is connected to the
power supply
It is recommended that a test is performed prior to the final
operation, in order to determine the fastening time for the
nut or bolt you are using.
Power cord
not plugged in
Power fault,
fuse or circuit
breaker tripped
When using the impact wrench follow the below procedure:
1. Hold the tool pointed straight at the nut or bolt.
Check the
power supply
Use authorised
Cord damaged service centre to
repair or replace
Tool will
not start
Use authorised
Faulty switch
Faulty motor
service centre to
repair or replace
Use authorised
service centre to
repair or replace
2. Depress the switch and fasten for the fastening time.
3. After fastening, always check the torque with a torque
wrench.
Carbon brush Replace the
worn off carbon brush
Impact Time
Extension cord Use extension cord
Many variables exist that will cause the available torque of
the fastener to vary considerably. The optimum impact time
is approximately 6 seconds.
too long or
undersized
heavy enough to
carry the current
Poor
performance
Use authorised
service centre to
repair or replace
Note. Using an universal joint or extension bar may reduce
the fastening force of the impact wrench and thus the
application may require longer fastening time.
Visible spark
Short of
lubricant
Use authorised service
centre to add lubricant
WARNING. The machine and the tool attachments
may become warm when being used for a long time. If
this occurs turn the machine off and place it in a safe
environment and allow to cool down. Do not attempt to
touch the metal blades after prolonged application as they
will be hot and may burn. Do not overload the machine and
always allow it to cool between the individual work steps.
Tool is
overheating
Turn off the tool and
let it cool down to room
temperature
Overtime
running
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Maintenance
Brush replacement
WARNING. Always ensure that the tool is switched off and
the plug is removed from the power point before making any
adjustments or maintenance procedures.
The impact wrench has externally accessible brush
assemblies that should be periodically checked for wear.
To check and replace the brushes follow the below
instructions.
1. Keep the tool’s air vents unclogged and clean at all times.
1. Unplug the impact wrench.
2. Regularly check to see if any dust or foreign matter has
entered the grills near the motor and around the on/off
switch. Use a soft brush to remove any accumulated dust.
Wear safety glasses to protect your eyes whilst cleaning.
2. With a flathead screwdriver,
remove the bush caps. The
brush assembly is spring
loaded and will pop out when
you remove the brush cap.
3. If the body of the tool needs cleaning, wipe it with a soft
damp cloth. A mild detergent can be used but nothing like
alcohol, petrol or other cleaning agents.
3. Remove the brush assembly
(brush and spring). Check for
wear. If worn, replace.
4. Never use caustic agents to clean plastic parts.
CAUTION. Water must never come into contact with
the tool.
Note: always replace in pairs.
Do not replace one side without
replacing the other.
5. Lubricate all moving parts at regular intervals.
Note. Do not at any time let brake fluid, petrol or petroleum-
based products, penetrating oils, etc., come in contact with
plastic parts. They can damage, weaken or destroy plastic
which may result in serious personal injury.
4. Replace the brush assembly.
5. Replace the brush cover and
tighten with a screwdriver.
Note: be careful not to
overtighten.
Electric tools used on fibreglass material, wallboard,
spackling compounds, or plaster are subject to accelerated
wear and possible premature failure because the fibreglass
chips and grindings are highly abrasive to bearings,
brushes, commutators, etc. Consequently, we do not
recommend using this tool for extended work on these
types of materials. However, if you do work with any of
these materials, it is extremely important to clean the tool
using compressed air.
General Inspection
Regularly check that all the fixing screws are tight.
They may vibrate loose over time.
Power cord maintenance
If the supply cord needs replacing, the task must be carried
out by the manufacturer, the manufacturer’s agent, or an
authorised service centre in order to avoid a safety hazard.
ꢀꢀ
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GMC customer assist
If your product needs repairing, replacing,
technical service or you simply need help or advice,
please contact us on our Customer Assist Line
ꢀ300 880 00ꢀ (Australia) or 0800 445 7ꢁꢀ (New Zealand).
For prompt service we suggest you log your service request
access to the Internet, please contact our service department
on ꢀ300 880 00ꢀ (Australia) or 0800 445 7ꢁꢀ (New Zealand).
7am –7pm, 7days a week (AEST).
Please note that if repair or replacement is required,
you must provide a valid original purchase receipt.
You will need the following details at hand to log your service request;
Personal details: First & Last name, address, pick up address,
contact phone numbers, email address
Product details: Product number, date of purchase, retailer bought from,
State & postcode, receipt number, reason for the request,
copy of official purchase receipt
Attach your purchase receipt and save with this Manual for future reference.
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