Worx WX279.X Installation manual

WX279 WX279.X
Lithium-Ion Brushless
Impact Wrench
SAFETY AND OPERATING
MANUAL

1
2
3
4
5
7
6

A3
B1
100%
0%
2
1
B2
A1 A3
A2
A4

C1
D1
C2
D2
D3
F
E
1: 1300/min
2: 2100/min
3: 2900/min

C1
D1
C2
D2
D3
F
E
1: 1300/min
2: 2100/min
3: 2900/min

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WX279 WX279.X
Lithium-Ion Brushless
Impact Wrench
PRODUCT SAFETY
GENERAL POWER TOOL
SAFETY WARNINGS
WARNING Read all safety warnings,
instructions, illustrations and specifications
provided with this power tool. Failure to follow all
instructions listed below may result in electric shock, fire
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.
1) Work area safety
a) Keep work area clean and well lit. Cluttered or
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) Keep children and bystanders away while
operating a power tool. Distractions can cause you
to lose control.
2) 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.
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.
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.
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.
f) If operating a power tool in a damp location is
unavoidable, use a residual current device (RCD)
protected supply. Use of an RCD reduces the risk of
electric shock.
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.
b) Use personal protective equipment. Always
wear eye protection. Protective equipment such as
dust mask, non-skid safety shoes, hard hat, or hearing
protection used for appropriate conditions will reduce
personal injuries.
c) Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to power source and/or battery pack, picking up
or carrying the tool. Carrying power tools with your
finger on the switch or energising power tools that
have the switch on invites accidents.
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.
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 and clothing away
from moving parts. Loose clothes, jewellery or long
hair can be caught in moving parts.
g) If devices are provided for the connection of
dust extraction and collection facilities, ensure
these are connected and properly used. Use of
dust collection can reduce dust-related hazards.
h) 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.
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.
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.
c) Disconnect the plug from the power source and/
or remove the battery pack, if detachable, 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.
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 and accessories. Check
for misalignment or binding of moving parts,
breakage of parts and any other condition
that may affect the power tool’s operation. If
damaged, have the power tool repaired before
use. Many accidents are caused by poorly maintained
power tools.
f) Keep cutting tools sharp and clean. Properly
maintained cutting 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,
taking into account the working conditions and

8
WX279 WX279.X
Lithium-Ion Brushless
Impact Wrench
the work to be performed. Use of the power tool
for operations different from those intended could
result in a hazardous situation.
h) Keep handles and grasping surfaces dry, clean
and free from oil and grease. Slippery handles and
grasping surfaces do not allow for safe handling and
control of the tool in unexpected situations.
5) Battery tool use and care
a) Recharge only with the charger specified by the
manufacturer. A charger that is suitable for one type
of battery pack may create a risk of fire when used
with another battery pack.
b) Use power tools only with specifically
designated battery packs. Use of any other battery
packs may create a risk of injury and fire.
c) 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 fire.
d) Under abusive conditions, liquid may be ejected
from the battery; avoid contact. If contact
accidentally occurs, flush with water. If liquid
contacts eyes, additionally seek medical help.
Liquid ejected from the battery may cause irritation or
burns.
e) Do not use a battery pack or tool that is
damaged or modified. Damaged or modified
batteries may exhibit unpredictable behaviour
resulting in fire, explosion or risk of injury.
f) Do not expose a battery pack or tool to fire
or excessive temperature. Exposure to fire or
temperature above 130 °C may cause explosion.
g) Follow all charging instructions and do not
charge the battery pack or tool outside the
temperature range specified in the instructions.
Charging improperly or at temperatures outside the
specified range may damage the battery and increase
the risk of fire.
6) 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.
b) Never service damaged battery packs. Service
of battery packs should only be performed by the
manufacturer or authorized service providers.
IMPACT WRENCH SAFETY
WARNING
1. Hold power tool by insulated gripping
surfaces, when performing an operation
where the fastener may contact hidden
wiring. Fasteners contacting a “live” wire may
make exposed metal parts of the power tool “live”
and could give the operator an electric shock.
SAFETY WARNINGS FOR
BATTERY PACK
a) Do not dismantle, open or shred cells or
battery pack.
b) Do not short-circuit a battery pack. Do not
store battery packs haphazardly in a box or
drawer where they may short-circuit each
other or be short-circuited by conductive
materials. 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 fire.
c) Do not expose battery pack to heat or fire.
Avoid storage in direct sunlight.
d) Do not subject battery pack to mechanical
shock.
e) In the event of battery leaking, do not
allow the liquid to come into contact
with the skin or eyes. If contact has been
made, wash the affected area with copious
amounts of water and seek medical advice.
f) Seek medical advice immediately if a cell
or battery pack has been swallowed.
g) Keep battery pack clean and dry.
h) Wipe the battery pack terminals with a
clean dry cloth if they become dirty.
i) Battery pack needs to be charged before
use. Always refer to this instruction and
use the correct charging procedure.
j) Do not maintain battery pack on charge
when not in use.
k) After extended periods of storage, it may
be necessary to charge and discharge
the battery pack several times to obtain
maximum performance.
l) Battery pack gives its best performance
when it is operated at normal room
temperature (20 °C ± 5 °C).
m) When disposing of battery packs, keep
battery packs of different electrochemical
systems separate from each other.
n) Recharge only with the charger specified
by Worx. Do not use any charger other
than that specifically provided for use with
the equipment. A charger that is suitable for
one type of battery pack may create a risk of fire
when used with another battery pack.
o) Do not use any battery pack which is not
designed for use with the equipment.
p) Keep battery pack out of the reach of
children.
q) Retain the original product literature for
future reference.
r) Remove the battery from the equipment
when not in use.
s) Dispose of properly.
t) Do not mix cells of different manufacture,
capacity, size or type within a device.
u) Do not remove battery pack from its

9
WX279 WX279.X
Lithium-Ion Brushless
Impact Wrench
original packaging until required for use.
v) Observe the plus (+) and minus (–) marks
on the battery and ensure correct use.
SYMBOLS
To reduce the risk of injury, user
must read instruction manual.
Warning
Wear ear protection
Wear eye protection
Wear dust mask
Wear protective gloves.
Batteries may enter water cycle if
disposed improperly, which can
be hazardous for ecosystem. Do
not dispose of waste batteries as
unsorted municipal waste.
Do not burn.
Li-I on
Li-I on
Li-Ion battery. This product has been
marked with a symbol relating to
‘separate collection’ for all battery
packs and battery pack. It will
then be recycled or dismantled in
order to reduce the impact on the
environment. Battery packs can be
hazardous for the environment and
for human health since they contain
hazardous substances.
High speed
Low speed
Lock
RCM marking
ABN: Australian Business
Number. By this number, business
information such as entity type,
status, business location etc. can be
found at website http://abr.business.
gov.au.
ABN of Positec Australia Pty Limited
is 14 101 682 357
COMPONENT LIST
1. FORWARD/REVERSE ROTATION SWITCH
2. BATTERY PACK *
3. HOOK
4. BATTERY PACK RELEASE BUTTON *
5. ON/OFF SWITCH
6. LED LIGHT
7. SQUARE DRIVER
* Not all the accessories illustrated or
described are included in standard delivery.
TECHNICAL DATA
Type WX279 WX279.X (2 - designation of
machinery, representative of Impact Wrench)
WX279 WX279.X***
Voltage 20 V Max**
No-load speed 0-1300/2100/2900 /min
Impact rate 0-1600/2900/3300 bpm
Max torque 100/180/300 N.m
Chuck size 1/2" (13 mm)
Machine
Weight(bare tool) 1.1 kg

10
WX279 WX279.X
Lithium-Ion Brushless
Impact Wrench
** Voltage measured without workload. Initial battery
voltage reaches maximum of 20 volts. Nominal
voltage is 18 volts.
*** X=1-999, A-Z, M1-M9 there are only used for
different customers, there are no safe relevant
changes between these models.
Category Model Capacity
20V Battery
WA3550 1.5 Ah
WA3550.1 1.5 Ah
WA3551 2.0 Ah
WA3551.1 2.0 Ah
WA3553 4.0 Ah
20V Charger
WA3760 0.4 A
WA3869 2.0 A
WA3880 2.0 A
We recommend that you purchase your accessories
from the same store that sold you the tool. Refer to
the accessory packaging for further details. Store
personnel can assist you and offer advice.
OPERATING INSTRUCTIONS
NOTE: Before using the tool, read the
instruction book carefully.
INTENDED USE:
This tool is intended for the fastening and loosening
of bolts, nuts and various threaded fasteners.This
tool is not intended for use as a drill.
ASSEMBLY AND
OPERATION
ACTION FIGURE
BEFORE OPERATION
Removing the Battery Pack See Fig. A1
Charging the Battery See Fig. A2
Installing the Battery Pack See Fig. A3
Checking the battery condition (only for
WX279)
See Fig. A4
ASSEMBLY
Inserting and Removing Socket (not
supplied)
See Fig.
B1, B2
Assembling the belt hook See Fig.
C1, C2
OPERATION
Switch Lock See Fig. D1
Forward And Reverse Rotation
Control
WARNING: Never Change
The Direction Of Rotation
When The Chuck Is Rotating,
Wait Until It Has Stopped!
See Fig.
D2, D3
Variable Speed Control See Fig. E
Operating the On/Off Switch
WARNING: Do not operate
for long periods at low
speed because excess heat will
be produced internally.
See Fig. F

11
WX279 WX279.X
Lithium-Ion Brushless
Impact Wrench
UsingThe LED Light
Before operation, the LED light
will be activated when the On/Off
switch is slightly depressed, and will
automatically turn off 20 seconds
after the On/Off switch is released.
The tool and battery are equipped
with a protection system. When
the LED Light is quickly flashing 3
seconds and turn off, the system
will automatically cut off power to
the tool to extend battery life.The
tool will automatically stop during
operation if the tool and/or battery
are placed under one of the following
conditions:
• Overloaded:The tool is operated
in a manner that causes it to draw
an abnormally high current. In this
situation, release theTrigger Switch
on the tool and stop the application
that caused the tool to become
overloaded.Then pull the Trigger
Switch again to restart.
• Overheated: Under the condition
above, if the tool does not start, the
Tool and Battery are overheated. In
this situation, let theTool and Battery
cool before pulling theTrigger Switch
again.
• Low battery voltage:The
remaining Battery capacity is too low
and the tool will not operate. In this
situation, remove and recharge the
Battery.
WARNING:
To turn on the light, press the
On/Off switch and make sure the
Forward/Reverse Rotation Control is
on right/left position.
See Fig. F
TROUBLE SHOOTING
1. I CAN NOT FIT THE BATTERY INTO THE
BATTERY CHARGER. WHY?
The battery can be inserted into the charger only in
one direction. Turn the battery around until it can
be inserted into the slot, the red LED Light should
turn on when the battery is charging.
2. REASONS FOR DIFFERENT BATTERY PACK
WORKING TIMES
Charging time problems, as above, and having
not used a Battery Pack for a prolonged time will
reduce the Battery Pack working time. This can
be corrected after several charge and discharge
operations by charging & working with your drill.
Heavy working conditions such as large screws
into hard wood will use up the Battery Pack energy
faster than lighter working conditions. Do not
re-charge your Battery Pack below 0oC and above
30oC as this will affect performance.
MAINTENANCE
Remove the battery pack from the machine
before carrying out any adjustment,
servicing or maintenance.
Your power tool requires no additional lubrication
or maintenance. There are no user serviceable
parts in your power tool. Never use water or
chemical cleaners to clean your power tool. Wipe
clean with a dry cloth. Always store your power
tool in a dry place. Keep the motor ventilation
slots clean. Keep all working controls free of
dust. Occasionally you may see sparks through
the ventilation slots. This is normal and will not
damage your power tool.
For Battery tools
The ambient temperature range for the use and
storage of tool and battery is 0oC-45oC.
The recommended ambient temperature range for
the charging system during charging is 0oC-40oC.
Positec Australia Pty Limited
10 Corporate Blvd Bayswater , VIC 3153,
Australia

Copyright © 2020 , Positec. All Rights Reserved.
AR01525801
www.worx.com