M7 DW-404 User manual

GERNERAL SAFETY RULES
GERNERAL POWER TOOL
SAFETY WARNINGS
WORK AREA SAFETY
INTENDED USE
ELECTRICAL SAFETY
Read all safety warnings, instructions,
illustrations and specications provided
with this power tool.
Failure to follow the warnings and instructions
may result in electric shock, re and / or
serious injury.
Save all warnings and instructions for
future reference.
The term “power tool” in the warnings refers
to your mains-operated (corded) power tool
or battery-operated (cordless) power tool.
Cordless Impact Wrench is intended for
driving in and loosening bolts and nuts.
1. Keep the work area clean and well lit.
Cluttered or dark areas invite accidents.
2. Do not operate power tools in explosive
atmospheres, such as in the presence
of ammable liquids, gases or dust.
Power tools create sparks which may ignite
the dust or fumes.
3. Keep children and bystanders away
while operating a power tool. Distractions
can cause you to lose control.
1. 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. Unmodied
plugs and matching outlets will reduce risk
of electric shock.
2. 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.
3.
Do not expose power tools to rain or
wet conditions. Water entering a power
tool will increase the risk of electric shock.
4. Do not abuse the cord. Never use the
cord for carrying, pulling or unplugging
the power tool. Keep the cord away
from heat, oil, sharp edges or moving
1. Stay alert, watch what you are doing
and use common sense when operating
a power tool. Do not use the tool while
tired or under the inuence of drugs,
alcohol, or medication. A moment of
inattention while operating power tools may
result in serious personal injury.
2. Use personal protective equipment.
Always wear eye protection. Protective
equipment such as a dust mask, non-
skid safety shoes, hard hat, or hearing
protection, used for appropriate conditions,
will reduce personal injuries.
3. Prevent unintentional starting. Ensure
that the switch is in the o󰀨-position
before connecting to a power source
and/or battery pack, picking up or
carrying the tool. Carrying power tools
with your nger on the switch or energizing
power tools that have the switch on invites
accidents.
4. 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.
5. Do not overreach. Keep proper
footing and balance at all times. This
enables better control of the power tool in
unexpected situations.
6.
Dress properly. Do not wear loose
clothing or jewelry. Keep your hair,
clothing and gloves away from moving
parts. Loose clothes, jewelry or long hair
can be caught in moving parts.
7. If devices are provided for the
connection of dust extraction and
collection facilities, ensure that these
are connected and properly used. Use
PERSONAL SAFETY
WARNING
parts. Damaged or entangled cords
increase the risk of electric shock.
5. 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.
6. If operating a power tool in a damp
location is unavoidable, use a ground-
fault circuit interrupter (RCD) protected
supply. Use of a RCD reduces the risk of
electric shock.
1

GERNERAL SAFETY RULES
POWER TOOL USE AND CARE
BATTERY TOOL USE AND CARE
1. Recharge only with the charger
specied by the manufacturer. A charger
that is suitable for one type of battery pack
may create a risk of re when used with
another battery pack.
2. Use power tools only with specically
designated battery packs. Use of any
other battery packs may create a risk of
injury and re.
3. When battery pack is not in use, keep
it away from other metal objects, like
paper clips, coins, keys, nails, screws
or other small metal objects that can
make a connection from one terminal
to another. Shorting the battery terminals
together may cause burns or a re.
4. Under abusive conditions, liquid may
be ejected from the battery; avoid
contact. If contact accidentally occurs,
ush with water. If liquid contacts
eyes, additionally seek medical help.
Liquid ejected from the battery may cause
irritation or burns.
5.
Do not use a battery pack or tool that
is damaged or modied. Damaged
or modied batteries may exhibit
unpredictable behaviour resulting in re,
explosion or risk of injury.
6.
Do not expose a battery pack or tool to
re or excessive temperature. Exposure
to re or temperature above 130 °C may
cause explosion (temperature „265 °F“).
7. Follow all charging instructions and
do not charge the battery pack or tool
outside the temperature range specied
in the instructions. Charging improperly
or at temperatures outside the specied
range may damage the battery and
increase the risk of re.
The battery pack will need to be recharged
before use.
1. Do not force the power tool. Use the
correct power tool for your application.
The correct power tool will do the job better
and more safely at the rate for which it was
designed.
2. Do not use the power tool if the switch
does not turn it on and o󰀨. Any power
tool that cannot be controlled with the
switch is dangerous and must be repaired.
3.
Disconnect the plug from the power
source and/or the battery pack from
the power tool before making any
adjustments, changing accessories,
or storing power tools. Such preventive
safety measures reduce the risk of starting
the power tool accidentally.
4. 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.
5. Maintain power tools. Check for
misalignment or binding of moving
parts, breakage of parts and any other
condition that may a󰀨ect the power
tool’s operation. If damaged, have the
power tool repaired before use. Many
accidents are caused by poorly maintained
power tools.
6. Keep cutting tools sharp and clean.
Properly maintained cutting tools with
sharp cutting edges are less likely to bind
and are easier to control.
7. Use the power tool, accessories, tool
bits, etc. in accordance with these
instructions, taking into account the
working conditions and the work to
be performed. Use of the power tool for
operations di󰀨erent from those intended
could result in a hazardous situation.
8. Keep handles and grasping surfaces
dry, clean and free from oil and grease.
CAUTION
of these devices can reduce dust-related
hazards.
8. Do not let familiarity gained from
frequent use of tools allow you to
become complacent and ignore tool
safety principles. A careless action can
cause severe injury within a fraction of a
second.
Slippery handles and grasping surfaces
do not allow for safe handling and control
of the tool in unexpected situations.those
intended could result in a hazardous
situation.
2

GERNERAL SAFETY RULES
SAFETY INSTRUCTIONS
SYMBOL MEANING
SAFETY ALERT SYMBOL: Indicates DANGER, WARNING, OR CAUTION. May be
used in conjunction with other symbols or pictographs.
DANGER indicates an imminently hazardous situation
which, if not avoided, will result in death or serious
injury.
WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury.
CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
injury.
Read all safety warnings designated by the symbol and all instructions.
The purpose of safety symbols is to attract your attention to possible dangers. The safety
symbols and the explanations with them deserve your careful attention and understanding. The
symbol warnings do not, by themselves, eliminate any danger. The instructions and warnings
they give are no substitutes for proper accident prevention measures.
Be sure to read and understand all safety instructions in this manual,
including all safety alert symbols such as “DANGER,” ”WARNING,” and “CAUTION”
before using this tool. Failure to following all instructions listed below may result in
electric shock, re, and/or serious personal injury.
!
DANGER
WARNING
WARNING
WARNING
CAUTION
SERVICE
RESIDUAL RISK
1. Have your power tool serviced by a
qualied repair person using only
identical replacement parts. This will
ensure that the safety of the power tool is
maintained.
2.
Never service damaged battery packs.
Service of battery packs should only
be performed by the manufacturer or
authorized service providers.
Use personal protective equipment.
1. High sound levels may cause hearing
damage. Always wear hearing protector
when operating this tool.
2. Wearing eye/face protection can reduce
the danger of high-speed socket being
ejected from the tool, due to improper
socket insertion during operation.
3. Test run the tool to conrm the rotation
direction before practical use. This
will reduce the potential hazard due to
unexpected rotating direction.
4. Prolonged use will cause user fatigue.
Periodic breaks are recommended for user
safety.
5. Avoid storing this tool where it is subject to
high humidity.
6. Prevent vibration and using wrench in
a short time. Should wear vibration-
absorbing gloves and watch out no loosen
parts of gloves to prevent entanglement by
wrench.
3

SAFETY SYMBOLS
Some of these following symbols may be used on this tool. Please study them and learn their
meaning. Proper interpretation of these symbols will allow you to operate the tool better and
more safely.
To ensure safety and reliability, all repairs should be performed by a
qualied service technician.
Dangerous Location Precaution Marking Label
Using Cordless Impact
Wrench
Electrostatic discharge devices that may be
dangerous to persons bearing pacemakers.
If the relative humidity is lower than 20%, please
use static eliminator to depress electrostatic
phenomenon to prevent the electric shock hazard
by electrostatic.
Using Cordless Impact
Wrench Eyes protection with safety glass
Using Cordless Impact
Wrench
Read the instruction manual carefully before
proceeding with start-up, operation, maintenance,
or any other jobs on the tool.
Using Cordless Impact
Wrench Ears protection
Using Cordless Impact
Wrench
Prevent vibration and using wrench in a short
time.
Should wear vibration-absorbing gloves and
watch out no loosen parts of gloves to prevent
entanglement by wrench.
Direct Current Type Or Characteristic Of Current
No-load Speed Rotational Speed At No Load
Class II Construction Double Insulated Construction
Per Minute Revolutions, Strokes, Surface Speed Orbits, etc.,
Per Minute …/min or min-1
WARNING
4

SPECIFIC SAFETY RULES
SPECIFIC SAFETY WARNINGS:
Some dust created by power sanding,
sawing, grinding, drilling and other
construction activities contains chemicals
known 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 lter out microscopic particles.
1. Use only with the chargers and batteries
listed below:
For use only with Li-Ion battery pack.
For use only with battery charger.
2. Always wear safety goggles and ear
protector when using this tool.
3. Prevent vibration and using wrench in
a short time. Should wear vibration-
absorbing gloves and watch out no loosen
parts of gloves to prevent entanglement by
wrench.
4. Ensure the switch is in the o󰀨 position
before inserting battery pack. Inserting the
battery pack into power tools that have the
switch on invites accidents.
5. Check the impact socket carefully for wear,
cracks or damage before installation.
6. Bit, sockets and tools get hot during
operation. Wear gloves when touching
them after use.
7. Remove the battery pack before changing
accessories. Accidental starting may occur,
because battery appliances with a battery
inserted are in the operative condition.
Switch is o󰀨 before attaching the battery
pack.
WARNING
WARNING
Battery Pack Charger
DB-1850P DC-18A
5

SAFETY RULES FOR CHARGER
1. Before using battery charger, read all
instructions and cautionary markings in
this manual and on the battery charger, the
battery and the product using the battery
to prevent misuse of the products and
possible injury or damage.
2. Do not use the charger outdoors or expose
it to wet or damp conditions. Water entering
the charger will increase the risk of electric
shock.
3. Use of an attachment not recommended or
sold by the battery-charger manufacturer
may result in a risk of re, electric shock or
injury to persons.
4. Do not abuse the cord or charger. Never
use the cord to carry the charger. Do not
pull the charger cord to disconnect the plug
from receptacle. Damage to the cord or
charger could occur and create an electric
shock hazard. Replace damaged cords
immediately.
5. Make sure that the cord is located so that it
will not be stepped on, tripped over, come
in contact with sharp edges or moving
parts, or otherwise subjected to damage
or stress. This will reduce the risk of
accidental falls, which could cause injury
and damage to the cord, which could then
result in electric shock.
6. Keep cord and charger from heat to
prevent damage to housing or internal
parts.
7. Do not allow gasoline, oils, petroleum-
based products, etc. to come in contact
with plastic parts. These materials contain
chemicals that can damage, weaken, or
destroy plastic.
8. An extension cord should not be used
unless absolutely necessary. Use of an
improper extension cord could result
in a risk of re and electric shock. If an
extension cord must be used, make sure
that:
9. Do not operate the charger with a
damaged cord or plug, which could cause
shorting and electric shock. If damaged,
have the charger repaired or replaced
by an authorized service technician at
Service Center.
10. Do not operate the charger if it has
received a sharp blow, been dropped, or
has otherwise been damaged in any way.
Take it to an authorized service technician
at Service Center for an electrical
check to determine if the charger is in
good working order.
11. Do not disassemble the charger. Take it
to an authorized service technician at a
. Service Center when service or repair
is required. Incorrect reassembly may
result in a risk of electric shock or re.
12. Unplug the charger from the electrical
outlet before attempting any maintenance
or cleaning to reduce the risk of electric
shock.
13. Disconnect charger from the power
supply when not in use. This will reduce
the risk of electric shock or damage to the
charger if metal items should fall into the
opening. It will also help prevent damage
to the charger during a power surge.
14. Risk of electric shock. Do not touch the
uninsulated portion of output connector or
uninsulated battery terminal.
The pins on plug of extension cord are the
same number, size and shape as those of the
plug on charger.
The cord is properly wired and in good
electrical condition
The size is large enough for AC ampere
rating of charger as specied below:
The Cord Length (Feet) 25’ 50’ 100’
Cord Size (AWG) 16 (AWG)
NOTE: AWG = American Wire Gauge
To reduce the risk of electric shock or
damage to the charger and battery, charge
only those lithium-ion rechargeable batteries
as specially designated on your charger’s
label. Other types of batteries may burst,
causing personal injury or damage.
CAUTION
6

15. Save these instructions. Refer to them
frequently and use them to instruct others
who may use this tool. If you lend this
tool to someone else, also lend these
instructions to them to prevent misuse of
the product and possible injury.
lead from lead-based paintslead from
lead-based paints
Arsenics and chromium from chemically
reacted lumber.reacted 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.
1. The serial number of Mighty Seven would have year in 2nd/3rd digital number and months
showed by 4th/5th digital number.
Some dust created by power Cutting contains
chemicals known to cause cancer, birth
defects or other reproductive harm. Some
examples of these chemicals are:
GENERAL INFORMATION
WARNING
7

FUNCTIONAL DESCRIPTION
OPERATING CONTROL
1. Main Parts of DW-404
This tool is intented for driving in and loosening bolts and nuts.
1/2" Square Drive
LED Worklight
Trigger Switch
Mode Selector
Belt Clip
Direction Of
Rotation Selector
Vents
8

CAUTION
NOTE: Due to continuing program of development, the specications in this manual are
given as general information and are not binding. We reserve the right to e󰀨ect, at any time and
without prior notice, changes or alternations to parts, tting and accessory equipment deemed
necessary for any reason what so ever.
DW-404:
A-weighted sound pressure level measuring: LpA= 72.8dB, Uncertainty KpA= 2.5 dB
A-weighted sound power level under calculation: LwA= 93.7dB, Uncertainty KwA= 2.5 dB
Vibration level (m/s2): 14.5 m/s2, Uncertainty K = 1.5 m/s2
Prevent vibration and using wrench in a short time. Should wear vibration-
absorbing gloves and watch out no loosen parts of gloves to prevent
entanglement by wrench.
SPECIFICATIONS
2. TOOL SPECIFICATIONSNOTE:
Model DW-404
Square Driver 1/2”(12.7mm)
Bolt Capacity M6-M16
Max. torque (FT-LB / Nm) 660 FT-LB (900 Nm)
Li-Ion Battery Pack DB-1850P (5.0 Ah)
Charger 220-240V~
Allowable temperature range (°C) 0-40
Rated Voltage 18Vd.c. (18 )
no/No Load speed (min-1)
I : 0-900 RPM (min-1)
II : 0-1400 RPM (min-1)
III : 0-1800 RPM (min-1)
IIII : 0-2200 RPM (min-1)
Impacts per minute (/min)
I : 0-1150
II : 0-1700
III : 0-2300
IIII : 0-2500
Weight (kg) 1.16
9

The battery pack will need to
be recharged before use.
CAUTION
1. LED FUNCTIONS OF CHARGER
2. POWER BAR
3. LOW-BATTERY CAPACITY INDICATOR
5. WHEN TO CHARGE THE BATTERY PACK
4. STORAGE RECOMMENDATIONS
This Lithium-Ion battery pack is equipped with a POWER BAR, which is used to display the
battery pack’s remaining run time. Press the POWER BAR button to display the LED lights.
The LED lights will stay lit for approximately 4 seconds.
NOTE: The POWER BAR can be used whether the battery is attached or removed from tool.
•If LED worklights on the POWER BAR
begins to rapidly and continuously ash
when the trigger switch on the wrench is
depressed, the battery pack’s power has
run out, and the battery pack should be
recharged.
•Unlike other battery pack types, Lithium-
Ion battery packs deliver fade-free power
for their entire run time. The tool will not
experience a slow, gradual loss of power
as you work. To signal that the battery pack
is at the end of its run time and needs to
be charged, the power to the tool will drop
quickly. The POWER BAR will begin to
display four ashing LED lights when the
battery is completely discharged. When
this happens, remove the tool from the
workpiece, and charge the battery pack as
needed.
•The best storage place is one that is cool and
dry, away from direct sunlight and excess
heat or cold, Do not exceed 40°C (104 °F).
•For long storage, it is recommended to store
a fully charged battery pack in a cool dry
place out of the charger for optimal results.
•Use the POWER BAR to determine when
you need to recharge the battery pack.
• You can “top-o󰀨” your battery pack’s
charge before starting a big job or long
period of use.
NOTE: The POWER BAR may also display
four ashing LED lights due to an overload or
high temperature situation.
The Lithium-Ion battery can be charged
at any time and will not develop a
“memory” when charged after only a partial
discharge. It is not necessary to run down
the battery pack charge before recharging.
Remove the battery pack from the tool
when convenient for you and your job.
LED INDICATOR
HI/LO TEMP.
(SEE MANUAL)
DEFECTIVE
BATTERY
BATTERY
CHARGING
BATTERY
FULL
BATTERY PACK
Hot/Cold battery On O󰀨 Charging will begin when battery
returns to 0°C-40°C
Defective Flashing O󰀨 Battery pack or Charger is
defective
Charging O󰀨 Flashing Charging
Fully charged O󰀨 On Charging is complete
Maintenance charging
RED LED GREEN LED ACTION
40-59% Charge
60-79% Charge
80-100% Charge
20-39% Charge
Under 20% Charge
Completely Discharged
High/Low Temperature
10

WARNING
WARNING
WARNING
If any part is broken or missing, DO NOT
attempt to attach the battery or operate
the tool until the broken or missing part is
replaced. Failure to do so could result in
possible serious injury.
ASSEMBLY
ASSEMBLY
UNPACKING
TO DETACH BATTERY
PACK (FIG. 1)
TO ATTACH BATTERY
PACK (FIG. 1)
Do not attempt to modify this tool or create
accessories not recommended for use with
this tool. Any such alteration or modication
is misuse and could result in a hazardous
condition leading to possible serious injury.
Your tool should never be connected to the
battery when you are assembling parts,
making adjustments, installing or removing
blades, cleaning, or when it is not in use.
Disconnecting the tool will prevent accidental
starting, which could cause serious personal
injury.
1. Carefully remove the tool and any
accessories from the carton. Make sure
that all items listed in the packing list are
included.
2. Inspect the tool carefully to make sure that
no breakage or damage occurred during
shipping.
3. Do not discard the packing material
until you have carefully inspected and
satisfactorily operated the tool.
1. Make sure that the cordless tool is
switched o󰀨.
2. Depress the battery-release buttons
located on the front of the battery pack to
release the battery pack.
3. Pull the battery pack out and remove it
from the cordless tool.
1. Make sure that the sander is switched
o󰀨.
2. Align the raised rib on the battery pack with
the grooves on the bottom of the Impact
Wrench, and then slide the battery pack
onto the tool.
NOTICE: Make sure that the latch on the
battery pack snaps into place and the battery
pack is secured to the cordless tool before
operation.
Release Button
Detach
Attach
FIG. 1
11

OPERATION
TRIGGER SWITCH (FIG. 2)
VARIABLE SPEED
MODE SELECTOR (FIG. 4)
DIRECTION -OF-ROTATION
SELECTOR (FORWARD/CENTER-
LOCK/REVERSE) (FIG. 3)
1. To turn the Impact Wrench on, depress the
trigger switch.
2. To turn it o󰀨, release the trigger switch.
The variable-speed trigger switch delivers
higher speed with increased trigger pressure
and lower speed with decreased trigger
pressure.
The direction of rotation is reversible and
is controlled by a selector located above
the trigger switch. With the Impact Wrench
held in normal operating position: Position
the direction-of-rotation selector to the left
of the tool for forward rotation. Position the
direction-of-rotation selector to the right of the
tool for reverse rotation. Setting the switch
in the OFF (center-lock) position helps to
reduce the possibility of accidental starting
when not in use.
NOTICE: To prevent gear damage, always
allow the Impact Wrench to come to
a complete stop before changing the
direction of rotation.
NOTICE: The Impact Wrench will not
run unless the direction of the rotation
selector is engaged fully to the left or
right.
NOTICE: The Impact Wrench is designed
with 4-speed and loose-stop functions,
but the functions are available only when
the tool is operating in reverse rotation.
FIG. 2
Trigger
Switch
Direction
Of
Rotation
Selector
FIG. 3
Forward Reverse
FIG. 4
Loose Stop
Mode-Selector
Button
Speed
Mode-Selector
Button
1. Attach the battery pack to the Impact
Wrench.
2. Position the direction-of-rotation selector
to the rigth of the tool for forward rotation,
and press the trigger switch to turn on the
speed mode-indicator light.
3. Press the speed mode-selector button;
the speed will change in four steps: low-1,
medium2-3 and high-4.
12

OPERATION
ELECTRIC BRAKE
LED WORKLIGHT (FIG. 5)
LED worklight, located on the base of the
Impact Wrench, will illuminate when the
trigger switch is depressed. This provides
additional light on the surface of the
workpiece for operation in lower-light areas.
The light will automatically turn o󰀨 within 10
seconds after releasing the trigger.
The Impact Wrench is equipped with an
electric brake. When the trigger switch
is released, the electric brake engages
automatically to quickly stop the rotation.
FIG. 5
LED Worklight
INSTALLING THE BELT CLIP (FIG.
6)
REMOVING THE BELT CLIP
1. Align the rib of the belt clip with the holeon
the base of the wrench.
2. Insert the screw and tighten the screw
securely with a screwdriver (available
separately).
1. Use a screwdriver (available separately)to
loosen the screw that attaches the belt clip
to the wrench.
2. Remove the screw and the belt clip.
Belt Clip
FIG. 6
4. Position the direction-of-rotation selector
to the left of the tool for reverse rotation,
Press the loose stop mode-selector button
: the loose stop mode is available and the
loose stop indicator will be on. When the
bolt/nut is loose, the tool stops the impact
and rotation after approximately one
second.
5. To turn o󰀨 the loose stop function, press
the loose stop mode-selector button for :
the loose stop function will turn o󰀨.
13

OPERATION
FIG. 7
Always use the correct size socket for bolts
and nuts. An incorrect socket will result in
inaccurate and inconsistent fastening torque
and/or damage to the bolt or nut.
1. Lock the trigger switch by placing the
direction-of-rotation selector in the OFF
(center) position.
2. To install the socket, push it onto the output
drive of the tool until it locks into place.
3. To remove the socket, simply pull it o󰀨.
1. Start threading the fastener by hand onto
or into its threaded counterpart (e.g. nut
onto bolt, or bolt into nut or threaded hole).
2. With the proper impact socket securely
mounted to the Impact Wrench, slide the
impact socket onto the nut or bolt head.
The proper fastening torque may di󰀨er
depending on the type or size of the bolt, the
material of the workpiece to be fastened, etc.
NOTICE: Hold the tool straight along the
axis of the bolt or nut.
NOTICE: Excessive fastening torque
may damage the bolt/nut or socket.
Before starting your job, always perform
a test operation to determine the proper
fastening time for your bolt or nut.
Practice with various fasteners, noting the
length of time required to reach the desired
torque. Check the tightness with a hand-
torque wrench. If the fasteners are too tight,
reduce the impacting time. If they are not
tight enough, increase the impacting time.
3. Place the direction-of-rotation select or
in the FORWARD position, and select a
suitable speed or the auto-stop function.
Hold the tool rmly while depressing the
trigger switch. The impact socket will turn
the fastener and the impacting action
will begin when the fastener encounters
resistance.
To loosen:
1. With the proper impact socket securely
mounted to the wrench, slide the impact
socket onto the bolt head.
2. Place the direction-of-rotation select or in
the REVERSE position. Hold the tool rmly
while depressing the trigger switch. The
tool will start to impact immediately.
3. Once the fastener has “broken loose,” it
will start to unthread. Be careful that you
do not allow a fastener to spin freely once
it is no longer engaged with its threaded
counterpart, as it may be thrown out of the
socket.
INSTALLING AND REMOVING
THE SOCKET (FIG. 7)
INSTALLING FASTENERS
IMPACTING TIPS
NOTICE: The friction ring, with certain
plasticity and strength, helps to prevent
the socket from disengaging from the
output drive of the impact wrench during
the operation.
NOTICE: Always keep the Impact Wrench
at a right angle to the fastener to avoid
damaging the fastener head.
To fasten:
Friction Ring
14

OPERATION
Hold the tool rmly, and place the socket over
the bolt or nut. Turn the tool on, and fasten
the bolt or nut to the proper torque. The
torque that is required to loosen a fastener
averages 75% to 80% of the tightening
torque, depending on the condition of the
contacting surfaces. However, if rust or
corrosion causes seizing, more torque may
be required. After fastening, always check the
torque with a torque wrench. The fastening
torque is a󰀨ected by a wide variety of factors,
including the following:
•Socket
Socket Failure to use the correct size
socket will cause a reduction in the
fastening torque. A worn socket (wear on
the hex end or square end) will cause a
reduction in the fastening torque.
•Bolt
Although the torque coe󰀩cient and the
class of bolt may be the same, the proper
fastening torque will di󰀨er according to the
diameter of the bolt.
Even if the diameters of bolts are the
same, the proper fastening torque will di󰀨er
according to the torque coe󰀩cient, the class
of bolt and the bolt length.
•Accessories
The use of a universal joint or an extension
bar (both available separately) will reduce
the fastening force of the Impact Wrench
somewhat. Compensate by fastening for a
longer period of time.
•Technique
The manner of holding the tool or the
material to be fastened will a󰀨ect the
torque.
Always wear safety goggles or safety
glasses with side shields during power
tool operations, or when blowing dust. If
operation is dusty, also wear a dust mask.
Do not at any time let brake uids,
gasoline, petroleum-based products,
penetrating oils, etc. come in contact with
plastic parts. Chemicals can damage,
weaken or destroy plastic, which may
result in serious personal injury.
WARNING
WARNING
15

The battery is supplied partially charged. To
ensure full capacity of the battery, completely
charge the battery in the battery charger
before.
A fully discharged battery pack will charge in
50 minutes for DB-1850P in a surrounding
temperature between 32° F (0° C) and 104° F
(40° C).
The tool may be cleaned most e󰀨ectively
with compressed dry air. Always wear safety
goggles when cleaning tools with compressed
air.
Avoid using solvents when cleaning plastic
parts. Most plastics are susceptible to
damage from various types of commercial
solvents and may be damaged by their use.
Use clean clothes to remove dirt, dust, oil,
grease, etc.
1. Charge the Lithium-Ion battery pack with
the correct charger.
2. Connect the charger to a power supply.
3. Align the raised ribs of the battery pack
with the slot in the charger.
4. Slide the battery pack onto the charger.
5. The charger will communicate with the
battery pack to evaluate the condition of
the battery pack.
1. Inspect the Impact Wrench, the on/o󰀨
switch and the accessories for damage.
2. Check for damaged, missing, or worn
parts.
3. Check for loose screws, misalignmentor
binding of moving parts, or any other
condition that may a󰀨ect the operation.
4. If abnormal vibration or noise occurs,
turn the tool o󰀨 immediately and have the
problem corrected before further use.
5. Detach the battery from the Impact
Wrench before cleaning or performing
any maintenance. Using compressed air
maybe the most e󰀨ective cleaning method.
Always wear safety goggles when cleaning
tools using compressed air.
All of the bearings in this tool are lubricated
with a su󰀩cient amount of high grade
lubricant for the life of the unit under normal
conditions. Therefore, no further lubrication is
required.
6. The POWER BAR LED lights will cycle
from right to left during charging. This is
part of the normal charging operation.
7. After charging is complete, the green
LED on the charger will come on and the
POWER BAR LED lights will go displayed
when the POWER BAR button is pressed
while the battery pack is on the charger.
8. The battery pack will fully charge if left on
the charger, but it will not overcharge.
BATTERY CHARGING
BEFORE EACH USE
LUBRICATION
NOTE: For your convenience, the charger
can operate with most generators and
inverters rated at 300 watts or higher.
OPERATION
MAINTENANCE
16

1. Tool, accessories and packaging should be sorted for environment-friendly recycling.
2. Power tools and accessories at the end of their service life still contain large amounts of valuable
raw materials and plastics which can likewise be fed back into a recycling process.
3. Some dust created by working contains harmful chemicals must be collected by special garbage
re- cycle site.
4. At the end of tool’s life, discard it with due care for our environment:
- Run the battery pack down completely, then remove it from the tool.
- Li-Ion cells are recyclable. Take them to your dealer or a local recycling station. The collected
battery packs will be recycled or disposed of properly.
1. In case of warranty, repair or the purchase of spare parts, always contact an authorized service
center. Attach the service card and the invoice.
2. The warranty does not cover normal wear, overloading or abnormal use of the product.
NO
SERVICE
ACCESSORIES
TROUBLESHOOTING
ENVIRONMENT PROTECTION
PROBLEM CAUSE SOLUTION
The Impact Wrench does not
work. The battery is depleted. Charge the battery.
The Impact Wrench does not
work and the tool LED worklight
ashes.
The tool is overheated. Allow the tool to cool down.
The impact wrench does not
work and the battery pack LED
light ashes.
The battery is overheated. Allow the battery to cool down.
17

EC DECLARATION OF CONFORMITY
Brand Name: Mighty Seven
Serial Number: Please refer to the tool
Cordless Impact Wrench
Item No.: DW-404A (Tool is DW-404) and DW-404A1 (Tool is DW-404)
to which this declaration applies, complies with these normative documents:
•Machinert Directive: 2006/42/EC
•EMC: 2014/30/EU
and conforms to the following EN standard,
to which this declaration applies, complies with these normative documents:
• LVD: 2014 / 35 / EU
• EMC: 2014 / 30 / EU
• and conforms to the following EN standard,
• EN 61000-3-2:2019+A1:2021 • EN 61000-3-3:2013+A1:2019
Battery Charger
Item No.: DC-18A (Charger), Only with Li-Ion Battery Pack (DB-1850P)
Authorized contact, to compile the technical les :
Established with the EU
King Tony Europe
3 Rue des imprimeurs ZI République Nord 1.
No. 70-25, Qingguang RD., Wujih Dist.,
86000 POITIERS FRANCE
Taichung City, 41466 Taiwan.
TEL: [phone]
http://www.mighty-seven.com
E-MAIL: [e-mail]
General Manager
Christian Aubineau
Declared in: Taichung, Taiwan
Date: 2023/06/01
Jay Lin
Declared by: QA Manager
Manufacturer:
Mighty Seven International Co., Ltd.
Signature
• EN 62841-1:2015/AC:2015
• EN ISO 12100:2010
• EN 62841-2-2:2014/AC:2015
• EN 55014-1:2021 • EN 55014-2:2021
• EN 62233:2008
• EN 55014-1:2021 • EN 55014-2:2021
• EN 60335-1:2012+A13:2017 • EN 60335-2-29:2004+A11:2018
18

EC DECLARATION OF CONFORMITY
Brand Name: Mighty Seven
Serial Number: Please refer to the tool
Cordless Impact Wrench
Item No.: DW-404
to which this declaration applies, complies with these normative documents:
•Machinert Directive: 2006/42/EC
•EMC: 2014/30/EU
and conforms to the following EN standard,
Authorized contact, to compile the technical les :
Established with the EU
King Tony Europe
3 Rue des imprimeurs ZI République Nord 1.
No. 70-25, Qingguang RD., Wujih Dist.,
86000 POITIERS FRANCE
Taichung City, 41466 Taiwan.
TEL: [phone]
http://www.mighty-seven.com
E-MAIL: [e-mail]
General Manager
Christian Aubineau
Declared in: Taichung, Taiwan
Date: 2023/06/01
Jay Lin
Declared by: QA Manager
Manufacturer:
Mighty Seven International Co., Ltd.
Signature
• EN 62841-1:2015/AC:2015
• EN ISO 12100:2010
• EN 62841-2-2:2014/AC:2015
• EN 55014-1:2021 • EN 55014-2:2021
19

Declaration of Conformity
Brand Name:
Product Description: Cordless Impact Wrench
Item No.: DW-404
The above designated product(s) made by Mighty- Seven International Co.,Ltd
is/are in compliance with the prevailing requirements of the REACH Regulation
(1907/2006), Restriction of Hazardous Substances (RoHS) Directive 2011/65/EU
and all subsequent amendments including (EU) 2015/863.
RoHS Directive (2011/65/EU)
REACH Regulation (1907/2006)
No. 70-25, Qingguang RD., Wujih Dist., 86000 POITIERS FRANCE
Taichung City, 41466 Taiwan. TEL: [phone]
http://www.mighty-seven.com E-MAIL: [e-mail]
Declared in: Taichung, Taiwan
Date: 2023/06/01
QA Manager Jay Lin
Manufacturer: King Tony Europe
Authorized contact, to compile the technical les :
Mighty Seven International Co., Ltd. 3 Rue des imprimeurs ZI République Nord 1.
Signature
Name of hazardous substance Limited of RoHS ppm %
Pb <0.10%
Diisobutyl phthalate (DIBP) <0.10%
Dibutylphthalate (DBP) <0.10%
Butyl benzylphthalate (BBP) <0.10%
Phthalate
Bis(2-ethylhexy1) <0.10%
PBDE <0.10%
PBB <0.10%
Cr6+ <0.10%
Hg <0.10%
Cd <0.010%
20