EGO COMMERCIAL STX4500 User manual

BRUSHLESS
WARNING: To reduce the risk of injury, the user must read and understand the
Operator’s Manual before using this product. Save these instructions for future reference.
MNL_EGO_STX4500_AV01.01_230607
COMMERCIAL
OPERATOR’S MANUAL
56 VOLT LITHIUM-ION COMMERCIAL
CORDLESS LINE TRIMMER
MODEL NUMBER STX4500

B1 B2
BRUSHLESS
SPEED
A
1. Speed Indicator
8. Shoulder Strap
7. Loop Handle
10. Trimmer Line
11. Release Tab
13. Line-cutting Blade
14. Line Trimmer
Guard
12. Trimmer Head (Bump head)
24. Sealing Bolt
23. Hex Key
22*. Nut
26*. 3-tooth Blade
27*. Blade Sheath
(These are all for brush cutter head only)
21*. Outer Flange
20. Safety Barrier Bar 25*. Brush Cutter Guard
9. Shaft
6. Carrying
Eyelet
15. Threshold Ring
16. Lock-off Lever
17. Trigger Switch
24. Sealing
Bolt
18. Battery-release
Button
19. Latch
5. Rear Handle
4. Battery-status
Indicator 3. Speed Mode
Button
2. Bluetooth®Indicator
* SOLD SEPARATELY

D5
D1
D3
D4
D6
1
2
C
Safety
Barrier Bar
(only for use
with brush
cutter head)
Quick-release Lever
Loop
Handle
Clamping
Block
Wing Nut
D2

E1
E3
E2
E4
E5 E6
1
2
E8
Brush Cutter Guard
E7
Line Trimmer Guard

H1
H3
F1
H2
H4
F2
1
2
J
12
SPEED
K
Speed Mode Button
Bluetooth®
Indicator
Battery-
status
Indicator
Speed
Indicator

M1
L
N2 P
N1
1
2
M2
1
2
15 cm

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX4500 7
Original instructions
READ ALL INSTRUCTIONS!
READ OPERATOR’S MANUAL
Residual risk! People with electronic devices,
such as pacemakers, should consult their physician(s)
before using this product. Operation of electrical
equipment in close proximity to a heart pacemaker
could cause interference or failure of the pacemaker.
WARNING: To ensure safety and reliability, all
repairs and replacements should be performed by a
qualified service technician.
SAFETY SYMBOLS
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.
WARNING: Be sure to read and understand all safety
instructions in this Operator’s Manual, including all safety
alert symbols such as “DANGER,” “WARNING,” and
“CAUTION” before using this machine. Failure to follow all
instructions listed below may result in electric shock, fire,
and/or serious personal injury.
SYMBOL MEANING
SAFETY ALERT SYMBOL: Indicates DANGER,
WARNING, or CAUTION. May be used in conjunction with
other symbols or pictographs.
WARNING: The operation of any machines can
result in foreign objects being thrown into your eyes,
which can result in severe eye damage. Before beginning
power tool operation, always wear safety goggles or
safety glasses with side shields and a full face shield
when needed. We recommend a Wide Vision Safety Mask
for use over eyeglasses or standard safety glasses with
side shields.
SAFETY INSTRUCTIONS
This page depicts and describes safety symbols that may
appear on this product. Read, understand, and follow
all instructions on the machine before attempting to
assemble and operate it.
Safety Alert Indicates a potential
personal injury hazard.
Read
Operator’s
Manual
To reduce the risk of
injury, user must read and
understand operator’s
manual before using this
product.
Wear Eye
Protection
Always wear safety
gogglesor safety glasses
with side shields and a full
face shield when operating
this product.
Wear Ear
Protection
Always wear ear protection
when operating this
product.
Wear Head
Protection
Wear an approved safety
hard hat to protect your
head.
Wear
Protective
Gloves
Protect your hands with
gloves when handling blade
or blade guard.
Wear Safety
Footwear
Wear non-slip safety
footwear when using this
equipment.
Beware
of thrown
objects
Alerts user to beware of
thrown objects.
Beware of
blade thrust
Alerts user to beware of
blade thrust.
Disconnect
battery
before
maintenance
Alerts user to disconnect
battery before maintenance.
The distance
between the
machine and
bystanders
shall be at
least 15 m.
Alerts user to keep the
distance between the
machine and bystanders be
at least 15 m.
45cm
Cutting Width The Max. cutting width of
line trimmer

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX45008
2.7mm
Line
Diameter
The Diameter of the nylon
cutting line
XX
Noise Guaranteed sound power
level
WEEE
Waste electrical products
should not be disposed of
with household waste. Take
to an authorized recycler.
Regulatory
Compliance
Mark
This product complies
with applicable Australian
standards.
IPX5
Ingress
Protection
Degree
Protected against water
jets.
V Volt Voltage
Direct Current Type or a characteristic of
current
n0
Maximum
Speed Maximum rotational speed
.../min Per Minute Revolutions per minute
cm Centimeter Length or size
mm Millimeter Length or size
kg Kilogram Weight
°C Degrees
Celsius Temperature
GENERAL BATTERY-OPERATED MACHINE SAFETY
WARNINGS
WARNING:Read all safety warnings, instructions,
illustrations and specications provided with this
machine. 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 “machine” in the warnings refers to your
mains-operated (corded) machine or battery-operated
(cordless) machine.
Work area safety
◾Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
◾Do not operate machines in explosive atmospheres,
such as in the presence of ammable liquids,
gases or dust. Machines create sparks which may
ignite the dust or fumes.
◾Keep children and bystanders away while
operating a machine. Distractions can cause you to
lose control.
Electrical safety
◾Machine plugs must match the outlet. Never
modify the plug in any way. Do not use any
adapter plugs with earthed (grounded) machines.
Unmodified plugs and matching outlets will reduce risk
of electric shock.
◾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.
◾Do not operate the machine in rain or wet
conditions.Water entering the machine may increase
the risk of electric shock or malfunction that could
result in personal injury.
◾Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the machine. Keep
cord away from heat, oil, sharp edges or moving
parts. Damaged or entangled cords increase the risk
of electric shock.
◾When operating a machine outdoors, use an
extension cord suitable for outdoor use. Use of
a cord suitable for outdoor use reduces the risk of
electric shock.
◾If operating a machine in a damp location is
unavoidable, use a ground fault circuit interrupter
(GFCI) protected supply. Use of a GFCI reduces the
risk of electric shock.
Personal safety
◾Stay alert, watch what you are doing and use
common sense when operating a machine. Do
not use a machine while you are tired or under
the inuence of drugs, alcohol or medication. A
moment of inattention while operating machines may
result in serious personal injury.
◾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.
◾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 machine. Carrying machines with your finger on
the switch or energizing machines that have the switch
on invites accidents.

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX4500 9
◾Remove any adjusting key or wrench before
turning the machine on. A wrench or a key left
attached to a rotating part of the machine may result in
personal injury.
◾Do not overreach. Keep proper footing and balance
at all times. This enables better control of the machine
in unexpected situations.
◾Dress properly. Do not wear loose clothing or
jewelry. Keep your hair and clothing away from
moving parts. Loose clothes, jewelry or long hair can
be caught in moving parts.
◾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.
◾Do not let familiarity gained from frequent use of
machines allow you to become complacent and
ignore machine safety principles. A careless action
can cause severe injury within a fraction of a second.
Machine use and care
◾Do not force the machine. Use the correct machine
for your application. The correct machine will do
the job better and safer at the rate for which it was
designed.
◾Do not use the machine if the switch does not turn
it on and off. Any machine that cannot be controlled
with the switch is dangerous and must be repaired.
◾Disconnect the plug from the power source and/
or remove the battery pack, if detachable, from
the machine before making any adjustments,
changing accessories, or storing machines. Such
preventive safety measures reduce the risk of starting
the machine accidentally.
◾Store idle machines out of the reach of children
and do not allow persons unfamiliar with the
machine or these instructions to operate the
machine. Machines are dangerous in the hands of
untrained users.
◾Maintain machines and accessories. Check for
misalignment or binding of moving parts, breakage
of parts and any other condition that may affect
the machine’s operation. If damaged, have the
machine repaired before use. Many accidents are
caused by poorly maintained machines.
◾Keep cutting machines sharp and clean. Properly
maintained cutting machines with sharp cutting edges
are less likely to bind and are easier to control.
◾Use the machine, accessories and machine bits
etc. in accordance with these instructions, taking
into account the working conditions and the work
to be performed. Use of the machine for operations
different from those intended could result in a
hazardous situation.
◾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 machine in unexpected situations.
Battery machine use and care
◾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 fire when used
with another battery pack.
◾Use machines only with specically designated
battery packs. Use of any other battery packs may
create a risk of injury and fire.
◾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.
◾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.
◾Do not use a battery pack or machine that is
damaged or modied. Damaged or modified batteries
may exhibit unpredictable behavior resulting in fire,
explosion or risk of injury.
◾Do not expose a battery pack or machine to
re or excessive temperature. Exposure to fire or
temperature above 130 °C may cause explosion.
◾Follow all charging instructions and do not
charge the battery pack or machine outside the
temperature range specied in the instructions.
Charging improperly or at temperatures outside the
specified range may damage the battery and increase
the risk of fire.
Service
◾Have your machine serviced by a qualied repair
person using only identical replacement parts.
This will ensure that the safety of the machine is
maintained.
◾Never service damaged battery packs. Service
of battery packs should only be performed by the
manufacturer or authorized service providers.

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX450010
LINE TRIMMER AND BRUSH CUTTER SAFETY
WARNINGS
◾Do not use the machine in bad weather conditions,
especially when there is a risk of lightning. This
decreases the risk of being struck by lightning.
◾Thoroughly inspect the area for wildlife where the
machine is to be used. Wildlife may be injured by the
machine during operation.
◾Thoroughly inspect the area where the machine
is to be used and remove all stones, sticks, wires,
bones, and other foreign objects. Thrown objects
can cause personal injury.
◾Before using the machine, always visually inspect
to see that the cutter or blade and the cutter or
blade assembly are not damaged. Damaged parts
increase the risk of injury.
◾Follow instructions for changing accessories.
Improperly tightened blade securing nuts or bolts
may either damage the blade or result in it becoming
detached.
◾Wear eye, ear, head and hand protection. Adequate
protective equipment will reduce personal injury by flying
debris or accidental contact with the cutting line or blade.
◾While operating the machine, always wear non-slip
and protective footwear. Do not operate the
machine when barefoot or wearing open sandals.
This reduces the chance of injury to the feet from
contact with the moving cutters or lines.
◾While operating the machine, always wear long
trousers. Exposed skin increases the likelihood of
injury from thrown objects.
◾Keep bystanders away while operating the
machine. Thrown debris can result in serious personal
injury.
◾Always use two hands when operating the
machine. Holding the machine with both hands will
avoid loss of control.
◾Hold the machine by the insulated gripping
surfaces only, because the cutting line or blade
may contact hidden wiring. Cutting line or blades
contacting a “live” wire may make exposed metal parts
of the machine “live” and could give the operator an
electric shock
◾Always keep proper footing and operate the
machine only when standing on the ground.
Slippery or unstable surfaces may cause a loss of
balance or control of the machine.
◾Do not operate the machine on excessively steep
slopes. This reduces the risk of loss of control, slipping
and falling which may result in personal injury.
◾When working on slopes, always be sure of your
footing, always work across the face of slopes,
never up or down and exercise extreme caution
when changing direction. This reduces the risk of
loss of control, slipping and falling which may result in
personal injury.
◾Keep all parts of the body away from the cutter,
line or blade when the machine is operating.
Before you start the machine, make sure the cutter,
line or blade is not contacting anything. A moment
of inattention while operating the machine may result
in injury to yourself or others.
◾Do not operate the machine above waist height.
This helps prevent unintended cutter or blade
contact and enables better control of the machine in
unexpected situations.
◾When cutting brush or saplings that are under
tension, be alert for spring back. When the tension
in the wood fibers is released, the brush or sapling
may strike the operator and/or throw the machine out
of control.
◾Use extreme caution when cutting brush and
saplings. The slender material may catch the blade
and be whipped toward you or pull you off balance.
◾Maintain control of the machine and do not touch
cutters, lines or blades and other hazardous
moving parts while they are still in motion. This
reduces the risk of injury from moving parts.
◾Carry the machine with the machine switched
off and away from your body. Proper handling of
the machine will reduce the likelihood of accidental
contact with a moving cutter, line or blade
◾Only use replacement cutters, lines, cutting heads
and blades specied by the manufacturer. Incorrect
replacement parts may increase the risk of breakage
and injury.
◾When clearing jammed material or servicing the
machine, make sure the switch is off and the
battery pack is removed. Unexpected starting of the
machine while clearing jammed material or servicing
may result in serious personal injury.
◾When transporting or storing the machine, always
t the cover on metal blades. Proper handling of
the machine will reduce the likelihood of accidental
contact with the blade.
◾Damage to Trimmer - If you strike a foreign object
with the trimmer or it becomes entangled, stop the
machine immediately, check for damage and have any
damage repaired before further operation is attempted.
Do not operate with a broken guard or spool.

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX4500 11
◾If the equipment should start to vibrate abnormally,
stop the motor and check immediately for the
cause. Vibration is generally a warning of trouble. A
loose head may vibrate, crack, break or come off the
trimmer, which may result in serious or fatal injury.
Make sure that the cutting attachment is properly fixed
in position. If the head loosens after fixing it in position,
replace it immediately. Never use a trimmer with a
loose cutting attachment.
◾Use only with EGO’s battery packs and chargers
listed below:
BATTERY PACK CHARGER
BA1400, BA1400T, BA2800,
BA2800T, BA4200, BA4200T,
BA5600T, BA6720T
CH2100E, CH5500E,
CH7000E
BAX1501 CHX5500
Blade thrust causes and related warnings
Blade thrust is a sudden sideways, forward or backward
motion of the machine, which may occur when the blade
jams or catches on an object such as a sapling or a tree
stump. It can be violent enough to cause the machine and/
or operator to be propelled in any direction, and possibly
lose control of the machine.
Blade thrust and its related hazards can be avoided by
taking proper precautions as given below.
◾Maintain a rm grip with both hands on the
machine and position your arms to resist blade
thrust. Position your body to the left side of the
machine. Blade thrust can increase the risk of injury
due to the machine moving unexpectedly. Blade thrust
can be controlled by the operator if proper precautions
are taken.
◾If the blade binds, or when interrupting a cut
for any reason, switch the machine off and hold
the machine motionless in the material until the
blade comes to a complete stop. While the blade
is binding, never attempt to remove the machine
from the material or pull the machine backward
while the blade is in motion, otherwise blade thrust
may occur. Investigate and take corrective actions to
eliminate the cause of blade binding.
◾Do not use blunt or damaged blades. Blunt or
damaged blades increase the risk of jamming or
catching on an object, resulting in blade thrust.
◾Always maintain good visibility of the material
being cut. Blade thrust is more likely to occur in areas
where it is difficult to see the material being cut.
◾If you are approached by another person while
operating the machine, switch the machine off.
There is an increased risk of injury to other persons
being struck by the moving blade in the event of blade
thrust.
SAVE THESE INSTRUCTIONS!
SPECIFICATIONS
Voltage 56 V
n0
Low: 3500 /min
Medium: 4500 /min
High: 5200 /min
Cutting Mechanism Bump Head
Cutting Line Type 2.7 mm nylon twist line
Cutting Width 45 cm
Recommended Operating
Temperature 0°C - 40°C
Recommended Storage
Temperature -20°C - 70°C
Optimum Charging
Temperature 5°C - 40°C
Weight (without battery pack) 4.1 kg
Guaranteed sound power level 96 dB(A)
PACKING LIST
PART NAME QUANTITY
Line Trimmer 1
Line Trimmer Guard Assembly 1
Loop Handle Assembly 1
Shoulder Strap 1
Safety Barrier Bar (only use with brush
cutter head) 1
Hex Key 1
Operator’s Manual 1

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX450012
DESCRIPTION
KNOW YOUR LINE TRIMMER (Fig. A)
1. Speed Indicator
2. Bluetooth®Indicator
3. Speed Mode Button
4. Battery-status Indicator
5. Rear Handle
6. Carrying Eyelet
7. Loop Handle
8. Shoulder Strap
9. Shaft
10. Trimmer Line
11. Release Tab
12. Trimmer Head (Bump head)
13. Line-cutting Blade
14. Line Trimmer Guard
15. Threshold Ring
16. Lock-off Lever
17. Trigger Switch
18. Battery-release Button
19. Latch
20. Safety Barrier Bar
21*. Outer Flange
22*. Nut
23. Hex Key
24. Sealing Bolt (2)
25*. Brush Cutter Guard
26*. 3-tooth Blade
27*. Blade Sheath
* SOLD SEPARATELY
ASSEMBLY
WARNING:If any parts are damaged or missing, do
not operate this product until the parts are replaced. Use
of this product with damaged or missing parts could result
in serious personal injury.
WARNING: Do not attempt to modify this product or
create accessories not recommended for use with this line
trimmer. Any such alteration or modification is misuse and
could result in a hazardous condition leading to possible
serious personal injury.
WARNING: To prevent accidental starting that could
cause serious personal injury, always remove the battery
pack from the machine when assembling parts.
WARNING: When the machine is equipped with
brush cutter head, the safety barrier bar shall be mounted.
MOUNTING THE GUARD (FIG. B1 & B2)
WARNING: Always wear gloves when mounting or
replacing the guard. Take care of the blade on the guard
and protect your hand from cutting.
WARNING: Never operate the machine without
the guard firmly in place. The guard must always be
on the machine to protect the user! When the guard is
fixed, never attempt to remove or adjust the guard, if
a replacement is needed, it should be performed by a
qualified service technician!
NOTICE: There are two kinds of guards compatible with
this machine. Only the guard with icon can be used
with line trimmer head and must NOT be used with brush
cutter head. Be careful to choose the correct guard when
using the machine.
NOTICE: The brush cutter guard is sold separately.
Loosen and remove the two bolts from the guard, align
the guard mounting holes with the assembly holes and
then lock the guard onto the shaft base with the two bolts,
together with two spring washers.
WARNING: Make sure the guard is fixed according
to Fig. B1 & B2, any reverse fixing will cause great danger!
MOUNTING AND ADJUSTING THE LOOP HANDLE
1. Stop the motor and remove the battery pack from the
machine, if installed.
2. Loosen the wing nut to separate the adjustable loop
handle (Fig. C).
NOTICE: Must install the safety barrier bar onto the loop
handle when the machine is equipped with brush cutter
head.
3. Push the loop handle onto the shaft between the
threshold ring and the warning label (Fig. D1).
4. Insert the clamping block into the handle slot (Fig. D2).
5. Align the recessed part in the barrier bar with the
protruded part on the loop handle, press the barrier
bar onto the loop handle (Fig. D3).
6. Mount the quick-release lever and tighten the wing

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX4500 13
nut. Make sure that the loop handle is positioned
upwards and points toward the top of the rear handle
(Fig. D4).
7. Pull the quick-release lever up to move/rotate the loop
handle to a comfortable operating position (Fig. D5).
8. Fold the quick-release lever to secure the loop handle
in place (Fig. D6).
WARNING: Never operate the machine without the
loop handle firmly in place.
REPLACE THE TRIMMER HEAD WITH THE BRUSH
CUTTER HEAD
1. Remove the battery pack from the machine
2. Rotate the trimmer head to align the slot in the flange
with the shaft-locking hole in the gear case and insert
a stabilizer into the hole (Fig. E1).
3. Rotate the trimmer head CLOCKWISE to remove it from
the motor shaft (Fig. E1, E2).
4. The blade is shipped with a sheath. Before mounting
the blade onto the brush cutter, the sheath should be
removed from the hook on the sheath (Fig. E3).
NOTICE: To protect against injury, you have to wear
gloves prior to any operation with the 3-tooth blade.
5. Mount the inner flange and flange cover into its place,
if they had separated from the shaft (Fig. E4).
6. Mount the blade onto the motor shaft, ensuring that
the surface of the blade is flush with the surface of the
inner flange bulge. Mount the outer flange and the nut
(Fig. E5). Finger-tighten the nut COUNTERCLOCKWISE.
7.
Position the gear case against a solid surface for
support. With one hand hold the brush cutter shaft and
the other hand grasp a 16 mm socket wrench (not
included) to tighten the nut COUNTERCLOCKWISE
(Fig. E6).
8. Remove the line trimmer guard by loosening the two
bolts with washers (Fig. E7).
9. Install the brush cutter guard (not included) with the
two bolts and washers from the line trimmer, the same
way as line trimmer guard (Fig. E8).
NOTICE: When the machine is equipped with the brush
cutter head, be carefully to choose the correct guard.
OPERATION
WARNING: Do not allow familiarity with this product
to make you careless. Remember that a careless fraction
of a second is sufficient to inflict serious injury.
WARNING: Always wear eye protection, along with
hearing protection. Failure to do so could result in objects
being thrown into your eyes and other possible serious
injuries.
WARNING: Do not use any attachments or
accessories not recommended by the manufacturer of
this product. The use of attachments or accessories not
recommended can result in serious personal injury.
WARNING: To prevent serious personal injury,
remove the battery pack from the machine before
servicing, cleaning, changing attachments or removing
material from the unit.
APPLICATIONS
You may use this product for the purposes listed below:
Trimming: used for removing grass and weeds up against
walls, fences, trees and borders.
Cutting: used for cutting the grass that is difficult to
reach using a normal mower.
NOTICE: The machine is to be used only for its prescribed
purposes. Any other use is deemed to be a case of
misuse.

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX450014
ATTACHING/DETACHING THE BATTERY PACK
Fully charge before rst use.
To Attach (Fig. F1)
Align the battery ribs with the mounting slots in the
machine battery port and slide the battery pack until it
snaps into position.
To Detach (Fig. F2)
Depress the battery-release button and the battery pack
will disengage from the latch.
WARNING:Always be aware for the location of your
feet, children, or pets when pressing the battery-release
button. Serious injury could result in if the battery pack
falls. NEVER remove the battery pack at a high location.
MOUNTING THE SHOULDER STRAP AND HOLDING
THE MACHINE
Depress the carabiner to open it and attach it onto the
carrying eyelet (Fig. H1).
For safe and better operation, put on the shoulder strap
across the shoulder as Fig. H2. Adjust the shoulder strap
in a comfortable operating position. Hold the machine with
both hands: One hand on the rear handle and the other
hand on the loop handle. The trimmer head should be
parallel to the ground so that it easily contacts the material
to be cut without the operator having to bend over.
There are two ways to release the strap. Take it away from
your shoulder directly (Fig. H3) or press the hook of the
strap and take it apart from the carrying eyelet fixed on the
shaft (Fig. H4).
WARNING:The shoulder strap is also a quick
release mechanism in a hazardous situation. When
an emergency occurs, take it off from your shoulder
immediately, no matter what way the strap is in.
WARNING:When wearing the strap, no other
wearable should interfere with the release and removal
of the strap.
WARNING:You should not use the single-shoulder
strap and double-shoulder strap simultaneously.
STARTING/STOPPING THE MACHINE (Fig. J)
To Start
1. Move the lock-off lever forward and then press the
trigger switch to start.
2. Different pressure on the trigger results in variable
rotating speed of the cutting unit. Adjust the speed to
suit the task at hand.
NOTICE: The motor starts only when the lock-off lever is
moved forward and the trigger switch is depressed at the
same time.
To Stop
Move the machine away from the cutting area and release
the trigger switch to stop it.
WARNING:Always remove the battery pack from the
machine during work breaks and after finishing work.
CHANGING SPEED MODE (FIG. K)
The machine features three speed modes.
Every time press the speed mode switch, the speed mode
will change.
The speed indicator will display the active speed status:
one light for low speed, two lights for medium speed,
three lights for high speed. The low speed mode provides
better control of the machine and longer operating time
per charge.
NOTICE:
The speed mode can be set before the machine is turned
on OR during operation.
When the machine is re-started after a break, the speed
mode will return to the previous speed.
BATTERY-STATUS INDICATOR AND SPEED
INDICATOR (FIG. K)
The battery-status indicator shows the charge level and
the working status of the battery pack, and the speed
indicator shows the working status of the machine as
shown in the chart below. The battery-status indicator
and the speed indicator will illuminate when the machine
is started OR the speed mode button is pressed.

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX4500 15
Indicator Lights Meaning
Battery-status
indicator
Solid green Battery charge level of 20% to 100%
Flashing green Battery charge level of 10% to 20%
Solid red Battery charge level of less than 10%
Flashing red The battery pack is nearly depleted and needs
to be charged immediately.
Solid orange
The battery pack is overheated. Cool the battery
pack until the temperature drops below 67°C.
See “Battery High-Temperature Protection”
below
Flashing red/
green alternately
The battery pack electronics error. Replace
the battery pack or contact EGO customer
service center. See “Battery Electronics Error
Protection” below.
Speed indicator
(the illustration
shows the high
speed)
Solid green The machine is working properly.
Solid orange
The machine is overheated. Cool the machine until
the temperature drops below 80°C. See “Machine
High-Temperature Protection” below.
Flashing orange The machine is overloaded. See “Machine
Overload Protection” below.
Battery High-Temperature Protection
If the battery temperature exceeds 70°C during operation, the temperature-protection circuit will immediately shut off
the machine to protect the battery pack from overheating damage. The battery-status indicator will glow solid orange.
Release the trigger and wait until the overheated battery cools down and the indicator turns green, then restart the
machine.
Battery Electronics Error Protection
When the battery pack electronics error occurs, the battery-status indictor will flash red/green alternately and the
machine will shut off in 3 seconds. Replace the battery pack or contact EGO customer service center.
Machine Overload Protection
This machine has built-in overload circuit protection. When the machine is overloaded, the motor will stop and the
speed indicator will flash orange. Remove the battery pack from the machine, then reattach the battery pack and restart
the machine. Decrease the load on the machine, avoid too long or oversize cutting line or cutting on the heavy/woody
shrubs.
Machine High-Temperature Protection
If the machine temperature exceeds 90°C during operation, the temperature-protection circuit will immediately shut off
the machine from overheating damage. The speed indicator will glow solid orange. Release the trigger and wait until the
overheated machine cools down and the speed indicator turns green, then restart the machine.

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX450016
USING WITH LINE TRIMMER HEAD
WARNING:To avoid serious personal injury, wear
goggles or safety glasses at all times when operating this
unit. Wear a face mask or dust mask in dusty locations.
Clear the area to be cut before each use. Remove all
objects, such as rocks, broken glass, nails, wire, or line
that can be thrown or become entangled in the cutting
attachment. Clear the area of children, bystanders,
and pets. At a minimum, keep all children, bystanders
and pets at least 15m away; there still may be risk to
bystanders from thrown objects. Bystanders should be
encouraged to wear eye protection. If you are approached,
stop the motor and cutting attachment immediately.
Before each use, check for damage/worn parts
Check the bump head, guard and loop handle and replace
the parts that are cracked, warped, bent, or damaged in
any away.
The line-cutting blade on the edge of the guard can
dull over time. It is recommended that you periodically
sharpen it with a file or replace it with a new blade.
After each use, clean the trimmer.
CAUTION:Obstructions in the vents will prevent
the air from flowing into the motor housing and result in
overheating or damaged of the motor.
◾Use only mild soap and a damp cloth to clean the
machine. Never let any liquid get inside the machine;
never immerse any part of the machine into a liquid.
◾Keep air vents in the motor housing from debris at all
times.
WARNING:Never use water for cleaning your
trimmer. Avoid using solvents when cleaning plastic parts.
Most plastics are susceptible to damage from various
types of commercial solvents. Use clean cloths to remove
dirt, dust, oil, grease, etc.
Check for blockage of the trimmer head
◾To prevent blockage, keep the trimmer head clean.
Remove grass clippings, leaves, dirt and any other
accumulated debris before and after each use.
◾When blockage happens, stop the line trimmer and
remove the battery, then remove any grass that may
have wrapped itself around the motor shaft or trimmer
head.
Adjusting cutting line length (Fig. L)
The trimmer head allows the operator to release more
cutting line without stopping the motor. As line becomes
frayed or worn, additional line can be released by lightly
tapping the bump head on the ground while operating
the trimmer.
NOTICE: Line release will become more difficult if the
cutting line becomes too short.
WARNING:Do not remove or alter the line cutting
blade assembly. Excessive line length will cause the motor
to overheat and may result in serious personal injury.
Line replacement
NOTICE: Always use the recommended nylon cutting line
with a diameter that does not exceed 2.7 mm. Using line
other than that specified may cause the line trimmer to
overheat or become damaged.
WARNING:Never use metal-reinforced line, wire,
or rope, etc. These can break off and become dangerous
projectiles.
1. Remove the battery pack from the line trimmer.
2. Cut 6 m long cutting line, insert the line into the
mounting hole inside the eyelet (Fig. M1). Push and
pull the line from the other side until equal amounts
of line appear on both sides of the spool.
3. Press, while rotating the lower cover assembly in the
arrow direction, to wind the line onto the spool until
approximately 15 cm of line is showing on each side
(Fig. M2).
4. Push the lower cover assembly down while pulling on
the lines to manually advance the line and to check
for proper assembly of the trimmer head.
Reloading the cutting line
When the cutting line breaks from the line outlet or the
cutting line is not released when the trimmer head is
tapped, follow the below steps:
1. Press the release tabs on the upper cover and
remove the lower cover assembly by pulling it
straight out (Fig. N1).
2. Remove the cutting line from the spool.
3. With one hand holding the trimmer, use another hand
to grasp the lower cover assembly and align the tabs
on the upper cover with the slots in the lower cover
assembly (Fig. N2); Press the lower cover assembly
until it snaps into place with a distinct click sound.

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX4500 17
4. Follow the instructions in “Line replacement” to
reload the cutting line.
Tips for best trimming results
◾The correct angle for the cutting attachment is parallel
to the ground.
◾Do not force the trimmer. Allow the very tip of the line
to do the cutting (especially along walls). Cutting with
more than the tip will reduce cutting efficiency and
may overload the motor.
◾The cutting height is determined by the distance of the
cutting line from the lawn surface.
◾Grass over 8 inches (20 cm) should be cut by working
from top to the bottom in small increments to avoid
premature line wear or motor drag.
◾Slowly move the trimmer into and out of the area
being cut, maintaining the cutting head position at the
desired cutting height. This movement can be either
a forward-backward motion or a side-to-side motion.
Cutting shorter lengths produces best results.
◾Avoid trimming when grass and weeds are wet.
◾Wire and picket fences can cause extra string wear or
breakage. Stone and brick walls, curbs, and wood may
wear strings rapidly.
◾Avoid trees and shrubs. Tree bark, wood moldings,
siding, and fence posts can easily be damaged by the
strings.
USING WITH BRUSH CUTTER HEAD
WARNING:To cut wild growth and scrub, lower the
rotating 3-tooth blade down onto the growth to achieve a
chopping effect. Use the brush cutter like a scythe (sweep
it to the right and left) at ground level. Do not use the
cutting unit above waist height.
WARNING:The higher the cutting unit is off the
ground, the greater the risk of injury from cuttings being
thrown sideways.
WARNING:When cutting young stands or other
woody materials up to 2cm in diameter, use the left side of
the blade to avoid blade thrust situations. Do not attempt
to cut woody material with a larger diameter, since the
blade may catch or jerk the brush cutter forward. This
may cause damage to the blade or the brush cutter or loss
of control of the brush cutter, resulting personal injury.
WARNING:Improper use of a blade may cause it to
crack, chip, or shatter. Thrown parts may seriously injure
the operator or bystander. To reduce the risk of personal
injury, it is essential to take the following precautions:
◾Avoid contact with hard or solid foreign objects such as
stones, rocks or pieces of metal.
◾Never cut wood or shrubs with a stem diameter of
more than 2 cm.
◾Inspect the blade at a regular short interval for signs
of damage. Do not continue working with a damaged
blade.
◾Re-sharpen the blade regularly (when it has dulled
noticeably) and have it balanced if necessary
(performed by a qualified service technician).
Tips for best brush-cutting
◾Always hold brush cutter on your right side with both
hands when operating. Use a firm grip on both handles.
◾Maintain your grip and balance on both feet. Position
yourself so that you will not be drawn off balance by
the kickback reaction of the cutting blade.
◾Inspect and clear the area of any hidden objects such
as glass, rocks, concrete, fencing, wire, wood, metal,
etc., which can be thrown or entangled in the blade.
◾Never use blades near sidewalks, fencing, posts,
buildings or other immovable objects.
◾Never use a blade after hitting a hard object without
first inspecting it for damage. Do not use if any
damage is detected.
◾Use the unit for cutting from the right to the left in a
broad sweeping action from side to side.
◾Use only the EGOTM blade. Using any other brand blade
with this brush cutter could result in serious personal
injury.
MAINTENANCE
WARNING:Before inspecting, cleaning or servicing
the unit, stop the motor, wait for all moving parts to
stop, and remove the battery pack. Failure to follow
these instructions can result in serious personal injury or
property damage.
WARNING:When servicing, use only identical
replacement parts. Use of any other parts may create a
hazard or cause product damage. To ensure safety and
reliability, all repairs should be performed by a qualified
service technician.
CLEAN THE MACHINE
◾Clean the unit using a damp cloth with a mild
detergent.
◾Do not use any strong detergents on the plastic
housing or the handle. They can be damaged by
certain aromatic oils, such as pine and lemon, and by
solvents such as kerosene. Moisture can also cause
a shock hazard. Wipe off any moisture with a soft dry
cloth.

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX450018
LUBRICATE THE GEAR CASES
For best operation and longer lifetime, lubricate the gear
CASES with a special grease (4-5 ml each time) after
every 50 hours operation.
The special grease should meet the following
requirements:
1. Belong to DIN51818: NLGI-1 cone penetration
degree.
2. Ester base grease.
3. Excellent low-temperature startup, EP, mechanical
shearing, abrasion resistance and oxidative stability
properties.
4. Operation temperature must contain -40~180°C.
Remove the battery and the sealing bolts. Lubricating the
gear cases through the oil-hole.
STORING THE MACHINE
◾Remove the battery pack from the machine when it is
not in use.
◾Clean the machine thoroughly before storing it.
◾Store the unit in a dry, well-ventilated area, locked-up
or up high, out of the reach of children. Do not store
the machine on or adjacent to fertilizers, gasoline, or
other chemicals.
◾Use of the blade sheath onto the 3-tooth blade during
transport and storage.
Protecting the environment
Do not dispose of electrical appliances as
unsorted municipal waste, use separate
collection facilities.
Contact your local government for
information regarding the collection
systems available.
If electrical appliances are disposed of in
landfills or dumps, hazardous substances
can leak into the groundwater and get
into the food chain, damaging your health
and well-being.

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX4500 19
TROUBLESHOOTING
PROBLEM CAUSE SOLUTION
Fail to start
◾The battery pack is not attached
to the line trimmer. ◾Attach the battery pack to the line trimmer.
◾No electrical contact between
the machine and battery. ◾Reinsert the battery pack.
◾The battery pack is depleted. ◾Charge the battery pack.
◾The lock-off lever and trigger
switch are not depressed
simultaneously.
◾Move the lock-off lever forward, then depress the
trigger to turn on the machine.
The machine stops
working while
cutting
◾Heavy cutting line is used. ◾Use recommended nylon cutting line with diameter
no greater than 2.7 mm.
◾The motor is overloaded.
◾The machine will recover when the load is
removed. For continuous working, reduce the load
of the machine.
◾The battery pack or machine is
too hot.
◾Allow the battery pack or machine to cool until the
temperature drops below 67°C.
◾The battery pack is
disconnected from the machine. ◾Re-install the battery to the machine.
◾The battery pack is depleted. ◾Charge the battery pack.
The cutting line
can’t be released
(only using with
trimmer head)
◾The motor shaft or trimmer head
is wound with grass.
◾Stop the trimmer, remove the battery and remove
the grass from the motor shaft and trimmer head.
◾There is no enough line in the
trimmer head.
◾Remove the battery and replace the cutting line;
follow the section “LINE REPLACEMENT” in this
manual.
◾The trimmer head is dirty. ◾Remove the battery and clean the lower cover
assembly, spool and upper cover.
◾Line is tangled in the trimmer
head.
◾Remove the battery, remove the line from the
spool and rewind; follow the section “LINE
REPLACEMENT” in this manual.
◾The line is too short.
◾Remove the battery and pull the line while
alternately pressing down on and releasing the
trimmer head.
Grass wraps around
trimmer head and
motor housing
◾Cutting tall grass at ground
level.
◾Cut out the weeds into several sections from top to
ground level.

56 VOLT LITHIUM-ION COMMERCIAL CORDLESS LINE TRIMMER — STX450020
WARRANTY POLICY
For warranty service or to make a claim, please visit our Warranty Portal at egopowerplus.com.au/warranty-policy,
alternatively you can contact EGO customer service via the following, Australia 1300 000 346,
New Zealand 0508 000 346.
Chervon Australia Pty Ltd ABN 36 165 077 501 and Chervon New Zealand Subsidiary Ltd NZBN 9429049277616
(“Chervon”) warrants to the original domestic purchaser that this product will be free from defects in materials and
workmanship for 5 years from date of purchase, and any battery or charger will be free from defects in materials and
workmanship for 3 years from date of purchase. Warranty for commercial use is 1 year on all product, battery and
chargers. The Commercial Range Product Warranty for commercial users is 2 years for product, backpack battery
(BAX1501) and commercial charger (CHX5500E). Please refer to product warranty table below for further clarification.
To make a claim, call 1300 000 346 for AU or 0508 000 346 for NZ or lodge a claim via our portal link above. Any
handling and transportation costs (and other expenses incurred in claiming this warranty) are not covered by this
warranty and will not be borne by Chervon. The replacement product or part or repaired product will be made available
for your collection at an address nominated by Chervon. Where a valid warranty claim is made, Chervon will replace the
defective product or repair the fault. Where the product is repaired, Chervon may use refurbished parts. This warranty
does not cover normal wear and tear, misuse or abuse (including overloading of the product beyond capacity and
exposure to water or rain), accidents, neglect or lack of proper installation, and improper maintenance or storage. This
warranty does not cover the damage resulting from modification, alteration or unauthorised repair. This warranty does
not cover normal deterioration of the exterior finish, including but not limited to scratches, dents, paint chips, or to any
corrosion or discolouring by heat, abrasive and chemical cleaners. This warranty is void if the product has been used
for rental purpose. This warranty may also be further limited or voided as specifically detailed in the product Manual.
Chervon has no other liability under this warranty. The benefits to you given by this warranty are in addition to other
rights and remedies imposed by State and Federal legislation that cannot be excluded. Our goods come with guarantees
that cannot be excluded under the Australian Consumer Law and the New Zealand Consumer Guarantee Act 1993. You
are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss
or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality
and the failure does not amount to a major failure. The warranty applies to the original purchaser and applies only to
purchases made from authorised EGO Dealers, which can be confirmed on the website store locator. For avoidance of
doubt, 3rd party online stores such as eBay, Gumtree, Amazon, etc. are excluded.
Chervon Australia Pty Ltd, Unit 14, 5 Kelletts Rd, Rowville, VIC. 3178.
Ph Australia; 1300 000 346. Email: [email protected]
Chervon New Zealand Subsidiary Ltd, 4th Floor, Smith & Caughey Building, 253 Queen St, Auckland, 1141.
Ph New Zealand; 0508 000 346. Email: [email protected]