Stihl FSA 45 Instruction Manual
STIHL FSA 45
{
Instruction Manual
Manual de instrucciones
WARNING
Read Instruction Manual thoroughly before use and
follow all safety precautions – improper use can cause
serious or fatal injury.
ADVERTENCIA
Antes de usar la máquina lea y siga todas las precauciones
de seguridad dadas en el manual de instrucciones – el uso
incorrecto puede causar lesiones graves o mortales.
Instruction Manual
1 - 35
Manual de instrucciones
36 - 73
Contents
English
1 Introduction
2 Guide to Using this Manual
2.1 Signal Words
2.2 Symbols in Text
3 Main Parts
3.1 Trimmer and Charger
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3.2 Mowing Head, Cutting Attachments and Deflector
4 Safety Symbols on the Products
Original Instruction ManualPrinted on chlorine-free paper
4.1 Trimmer and Charger
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5 IMPORTANT SAFETY INSTRUCTIONS
5.1 Introduction
5.2 Intended Use
5.3 Operator
5.4 Personal Protective Equipment
5.5 Trimmer
5.6 Integrated Battery
5.7 Using the Trimmer
6 Charger Safety
6.1 Warnings and Instructions
7 Maintenance, Repair and Storage
7.1 Warnings and Instructions
8 Before Starting Work
Printing inks contain vegetable oils, paper can be recycled.
8.1 Preparing the Trimmer for Operation
9 Charging the Trimmer
9.1 Charging
10 LED Diagnostics
10.1 Trimmer Status
10.2 Charge Status
11 Assembling the Trimmer
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11.1 Combinations of Deflectors and Cutting
Attachments
11.2 Mounting the Deflector
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11.3 PolyCut 2-2 Mowing Head
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11.4 Mounting the Loop Handle
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12 Adjusting the Trimmer
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12.1 Adjusting the Length of the Drive Tube
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12.2 Adjusting the Loop Handle
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12.3 Converting the Trimmer for Edging
3
13 Inserting and Removing the Activation Key
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13.1 Inserting the Activation Key
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13.2 Removing the Activation Key
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14 Switching the Trimmer On and Off
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14.1 Switching On
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14.2 Switching Off
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15 Checking the Trimmer
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15.1 Testing the Controls
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15.2 Checking the Mowing Head and Cutting
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Attachment
16 During Operation
16.1 Using the Trimmer
16.2 Using the FSA 45 for Edging
17 After Finishing Work
17.1 Preparing for Transportation or Storage
18 Transporting the Trimmer
18.1 Trimmer
19 Storing the Trimmer and Charger
19.1 Trimmer
19.2 Polymer Blades
19.3 Charger
20 Cleaning
20.1 Cleaning the Trimmer and Charger
21 Inspection and Maintenance
21.1 Inspecting and Maintaining the Trimmer
22 Troubleshooting Guide
22.1 Troubleshooting
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{
© ANDREAS STIHL AG & Co. KG 2016
0458-718-8621-A. VA0.J16.
0000007382_002_GB
0458-718-8621-A
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
1
English
1 Introduction
23 Specifications
23.1 STIHL FSA 45
23.2 STIHL LK 45
23.3 Symbols on the Trimmer and Charger
23.4 FCC 15 Compliance Statement for Power Tool
and Charger
24 Replacement Parts and Equipment
24.1 Genuine STIHL Replacement Parts
25 Disposal
25.1 Disposal of the Trimmer and Charger
26 Limited Warranty
26.1 STIHL Incorporated Limited Warranty Policy
27 Trademarks
27.1 Registered Trademarks
27.2 Common Law Trademarks
28 Addresses
28.1 STIHL Incorporated
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32
1 Introduction
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32
Thank you for your purchase. The information contained in
32
this manual will help you receive maximum performance and
satisfaction from your trimmer and, if followed, reduce the
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risk of injury from its use.
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SAVE THIS MANUAL!
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35
Do not lend or rent the trimmer without this instruction
35
manual. Allow only persons who fully understand the
information in this manual to operate the trimmer.
For further information, or if you do not understand any of
the instructions in this manual, please go to
www.stihlusa.com (for Canada: www.stihl.ca) or contact
your authorized STIHL servicing dealer.
Because a trimmer is a high-speed cutting tool,
special safety precautions must be observed to
reduce the risk of personal injury.
Read this instruction manual thoroughly before
use and periodically thereafter. Follow all safety
precautions. Careless or improper use of the
trimmer can cause serious or fatal injury.
2 Guide to Using this Manual
2.1 Signal Words
This manual contains safety information that requires your
special attention. Such information is introduced with the
following symbols and signal words:
DANGER
Indicates a hazardous situation that, if not avoided, will
result in death or serious injury.
2
0458-718-8621-A
1 2
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10
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12
17
18
20
14
15
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5
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3
#
19
#
13
7
16
0000-GXX-1403-A0
3 Main Parts
WARNING
Indicates a hazardous situation that, if not avoided, could
result in death or serious injury.
NOTICE
Indicates a risk of property damage, including damage to the
machine or its individual components.
2.2 Symbols in Text
The following symbol is included to assist you with the use
of the manual:
Refers to a designated chapter or sub-chapter in this
instruction manual.
3Main Parts
3.1 Trimmer and Charger
The trimmer is powered by an integrated lithium ion battery
that cannot be removed from the power tool.
0458-718-8621-A
English
1 Control Handle
Trimmer's rear handle.
2 Trigger Switch Lockout
Must be depressed while the retaining latch is unlocked
to allow activation of the trigger switch.
3 Retaining Latch
Locks the trigger switch.
4 Activation Key
Enables the flow of electrical power from the integrated
battery to the motor.
5 Activation Key Socket
Socket for connecting the activation key to the trimmer.
6Star Knob
Tightens the loop handle in position.
7Housing
Contains the integrated battery.
3
English
3 Main Parts
8 Drive Tube Release Button
Unlocks the drive tube to allow length adjustment and
conversion for edging.
9 Loop Handle
Handle for the operator's front hand.
10 Trimmer LEDs
Indicate the trimmer's state of charge and display error
messages regarding potential malfunctions in the power
tool or its integrated battery.
11 Push Button
Activates the trimmer's LEDs.
12 Charging Socket
Socket for connecting the charger to the trimmer.
13 Trigger Switch
Activates the cutting attachment when depressed.
14 Drive Tube
Trimmer shaft.
15 Trimmer Head Adjustment Latch
Allows the angle of the trimmer head to be adjusted for
edging.
16 Bump Guard
Limits the cutting range of the mowing line and helps
regulate cutting depth during edging.
17 Connector
Connects the charger to the trimmer's charging socket.
18 Power Supply Cord
Supplies electrical charging current when the charger is
plugged into a wall outlet.
19 Plug
Connects the charger to a wall outlet.
20 Charger (Power Supply)
Power supply for charging the trimmer.
3.2 Mowing Head, Cutting Attachments and Deflector
1
2
4
3
6
5
1 Deflector
Designed to reduce the risk of injury from thrown objects
and contact with the cutting attachment.
2 Line Limiting Blade
Metal blade on the deflector that trims the mowing line to
the proper length.
3 Polymer Blade
Rigid cutting attachment for trimming grass and similar
material.
4 Mounting Post
Post on each side of the mowing head for mounting the
polymer blades.
5 Trimmer Line
Nylon cutting attachment for trimming grass and similar
material.
6 PolyCut 2-2 Mowing Head
The mowing head for mounting trimmer line or polymer
blades.
0000-GXX-1404-A1
# Rating Plate
Contains electrical information and the product's serial
number.
4
0458-718-8621-A
4 Safety Symbols on the Products
English
4 Safety Symbols on the Products
4.1 Trimmer and Charger
The following safety symbols are found on the trimmer and/
or charger:
To reduce the risk of injury, follow the specified
safety precautions.
Read and follow all safety precautions in the
instruction manual. Improper use can lead to
serious or fatal personal injury or property
damage.
To reduce the risk of eye injury, always wear
proper eye protection, @ 5.4.
To reduce the risk of personal injury from thrown
objects, inspect the work area and remove
stones, pieces of metal and other objects that
could be thrown by the cutting attachment.
@ 5.7.4.
15m (50ft)
To reduce the risk of injury or property damage
from unintended activation, remove the
activation key any time the trimmer is not in use,
@ 7.
To reduce the risk of personal injury or property
damage from a short circuit, fire or explosion,
keep the trimmer dry. Protect it from rain, water,
liquids and damp conditions. Never immerse the
trimmer in water or other liquids, @ 5.5.
To reduce the risk of personal injury
from thrown objects, keep bystanders
at least 50 ft. (15 m) away, @ 5.7.4.
To reduce the risk of personal injury or property
damage from fire, explosion or burns, including
chemical burns, do not disassemble the
trimmer's housing. Never crush, drop, damage
or heat the trimmer above 212 °F (100 °C),
expose it to fire or incinerate, @ 5.5.
To reduce the risk of personal injury or property
dam age from fire, use and store the trimm er on l y
within an ambient temperature range of 32 °F to
122 °F (0 °C to 50 °C), @ 5.6.
To reduce the risk of personal injury or property
damage from fire or electric shock, keep the
charger dry. Protect it from rain, water, liquids
and damp conditions. For indoor use only, @ 6.
5 IMPORTANT SAFETY
INSTRUCTIONS
5.1 Introduction
This section contains the prescribed general safety
warnings and instructions for handheld, motor-operated
electric trimmers. Additional important warnings and
instructions are provided in subsequent sections of this
manual.
WARNING
￭ When using electric trimmers, basic safety precautions
should always be followed to reduce the risk of fire,
electric shock and personal injury, including the following:
READ ALL INSTRUCTIONS BEFORE USING THE
TRIMMER!
1)Avoid Dangerous Environment – Don’t use trimmers in
damp or wet locations.
2)Don’t Use In Rain.
3)Keep Children Away – All bystanders should be kept at a
distance from work area.
0458-718-8621-A
5
English
5 IMPORTANT SAFETY INSTRUCTIONS
4)Dress Properly – Do not wear loose clothing or jewelry.
They can be caught in moving parts. Heavy-duty work
gloves (e.g. made of leather or other wear resistant
material) and substantial footwear are recommended
when working outdoors. Wear protective hair covering to
contain long hair.
5)Use Safety Glasses – Always use face or dust mask if
operation is dusty.
6)Use Right Tool – Do not use tool for any job except that for
which it is intended.
7)Avoid Unintentional Starting – Do not carry trimmer with
finger on the trigger switch.
8)Don’t Force Trimmer – It will do the job better and with less
likelihood of a risk of injury at the rate for which it was
designed.
9)Don’t Overreach – Keep proper footing and balance at all
times.
10)Stay Alert – Watch what you are doing. Use common
sense. Do not operate trimmer when you are tired.
11)Store Trimmer Indoors – When not in use, trimmer should
be stored indoors in a dry, locked place out of reach of
children with the activation key removed.
12)Maintain Trimmer With Care – Keep cutting attachment
clean for best performance and to reduce the risk of injury.
Follow instructions for changing accessories. Keep
handles dry, clean, and free from oil and grease.
13)Check Damaged Parts – Before further use of the
trimmer, a guard or other part that is damaged should be
carefully checked to determine that it will operate properly
and perform its intended function. Check for alignment of
moving parts, binding of moving parts, breakage of parts,
mounting, and any other condition that may affect its
operation. A guard or other part that is damaged should be
properly repaired or replaced by an authorized service
center unless indicated elsewhere in this manual.
14)Keep guards in place and in working order.
15)Keep hands and feet away from cutting area and cutting
attachment.
SAVE THESE INSTRUCTIONS
5.2 Intended Use
WARNING
￭ This trimmer is designed for light duty cutting of grass and
similar material in yards and gardens around the home.
Use of the trimmer for operations different than intended
could result in serious injury or death.
– Use the trimmer only for light-duty trimming tasks
around the home and garden.
– Cut grass and similar material only. Do not use the
trimmer for cutting shrubs, bushes or other types of
heavy vegetation.
– Do not use it for any other purposes. Misuse may
result in personal injury or property damage,
including damage to the trimmer.
￭ The LK 45 charger (power supply) is designed for
charging STIHL HSA 45, FSA 45 and BGA 45 power tools
only.
￭ Improper use could result in personal injury or property
damage.
– Use the trimmer and charger only as described in
this manual.
5.3 Operator
WARNING
￭ Working with the trimmer can be strenuous. The operator
must be in good physical condition and mental health. To
reduce the risk of personal injury from fatigue and loss of
control:
– Check with your doctor before using the trimmer if
you have any health condition that may be
aggravated by strenuous work.
– Do not operate the trimmer while under the influence
of any substance (drug, alcohol or medication, etc.)
that might impair vision, balance, dexterity or
judgment.
6
0458-718-8621-A
5 IMPORTANT SAFETY INSTRUCTIONS
English
– Be alert. Do not operate the trimmer when you are
tired. Take a break if you become tired.
– Do not permit minors to use the trimmer.
￭ According to STIHL's current knowledge, the electric
motor of this trimmer should not interfere with a
pacemaker.
– However, persons with a pacemaker should consult
their physician and pacemaker manufacturer before
operating this trimmer.
5.4 Personal Protective Equipment
WARNING
￭ To reduce the risk of personal injury:
– Always wear proper clothing and protective apparel,
including proper eye protection.
￭ Loss of control and severe cut injuries may result if hair,
clothing or apparel make contact with the moving cutting
attachment or otherwise become entangled in the
components of the trimmer. To reduce the risk of severe
personal injury:
– Wear sturdy and snug-fitting clothing that
also allows complete freedom of
movement.
– Wear overalls or long pants made of
heavy material to help protect your legs.
Do not wear shorts.
– Secure hair above shoulder level before starting
work. Avoid scarves, jewelry and other apparel that
could be caught on branches, brush or the moving
cutting attachment.
￭ To reduce the risk of eye injury:
– Always wear goggles or close-fitting
protective glasses with adequate side
protection that are impact-rated and
marked as complying with ANSI Z87 "+"
(for Canada: CSA Z94).
– To reduce the risk of injury to your face, STIHL
recommends that you also wear a face shield or face
screen over your goggles or protective glasses.
￭ To help maintain a secure footing and reduce the risk of
injury while working:
– Wear substantial footwear with non-slip
soles. Do not wear sandals, flip-flops,
open-toed or similar footwear.
￭ To improve your grip and help protect your hands:
– Always wear heavy-duty work gloves
made of leather or another wearresistant material when handling the
trimmer.
5.5 Trimmer
WARNING
￭ To reduce the risk of electric shock:
– Do not expose the trimmer to rain, water
or excessive moisture.
– Store the trimmer indoors.
– Never immerse the trimmer in water or
other liquids.
￭ If the moving cutting attachment contacts you, it may
result in serious cut injuries. To reduce the risk of injuries:
– Keep hands, feet and other parts of your body away
from the cutting attachment.
– Never touch the moving cutting attachment with your
hand or any other part of your body.
– Never operate the trimmer with a damaged or
missing deflector.
0458-718-8621-A
7
English
5 IMPORTANT SAFETY INSTRUCTIONS
￭ This battery-powered trimmer is intended only for light-
duty garden and landscape maintenance around the
home. Use for other purposes may increase the risk of
personal injury and property damage.
– Cut grass and similar material only. Do not use the
trimmer for cutting brush, shrubs, bushes or other
types of heavy vegetation.
– Read and follow the operating instructions in this
manual for approved applications, @ 16.
￭ To reduce the risk of personal injury to the operator and
bystanders:
– Always release the trigger switch and
remove the activation key before
assembling, transporting, adjusting,
inspecting, cleaning, servicing,
maintaining or storing the trimmer and
any other time it is not in use.
￭ Although certain unauthorized attachments may fit STIHL
trimmers, their use may be extremely dangerous. Only
attachments supplied by STIHL or expressly approved by
STIHL for use with this specific model are authorized.
– Use only attachments supplied or expressly
approved by STIHL.
– Never attempt to mount a metal blade for use on the
trimmer.
– Never modify this trimmer in any way.
￭ If the trimmer is dropped or subjected to similar heavy
impacts:
– Check that it is undamaged, in good condition and
functioning properly before continuing work.
– Check that the controls and safety devices are
working properly.
– Check the LEDs for error messages, @ 10.1.
– Never work with a damaged or malfunctioning
trimmer.
– Never use or charge a trimmer with a housing that is
cracked, deformed, excessively hot, leaking battery
fluid or otherwise damaged. These could be signs
that the battery inside the trimmer is damaged,
increasing the risk of personal injury and property
damage from short circuit, fire or explosion.
￭ If the trimmer is damaged, not working properly, has been
left outdoors, exposed to rain or damp conditions or
dropped into water or other liquid, its components,
including its integrated battery, may no longer function
properly and safety devices may be inoperative. To
reduce the risk of personal injury and property damage:
– Take the trimmer to your authorized STIHL servicing
dealer to be checked before further operation.
￭ Genuine STIHL replacement parts are specifically
designed to match your trimmer model and meet safety
and performance requirements.
– STIHL recommends using genuine STIHL
replacement parts.
5.6 Integrated Battery
WARNING
￭ Use of an unauthorized charging device can damage the
lithium ion battery inside the trimmer and result in fire,
explosion and personal injury and property damage.
– Charge the trimmer only with a genuine
STIHL LK 45 charger (power supply).
￭ The trimmer's integrated battery contains safety features
and devices which, if damaged, may allow it to generate
heat, rupture, leak, ignite or explode.
– Be alert for signs that the battery may be damaged:
never use or charge a trimmer with a housing that is
cracked, deformed, excessively hot, leaking battery
fluid or otherwise damaged.
– Never attempt to remove the battery or open or
disassemble the trimmer's housing for any reason.
– Never subject the trimmer to heavy impacts or
attempt to crush, drop or otherwise damage it.
8
0458-718-8621-A
5 IMPORTANT SAFETY INSTRUCTIONS
English
– Never heat the trimmer above 212 °F
(100 °C) or place it on or near fires,
stoves or other high-temperature
locations.
– Never expose the trimmer to microwaves or high
pressures.
– Never insert foreign objects into the trimmer's
charging socket, activation key socket or other
openings.
￭ High temperatures may cause the trimmer's integrated
battery to generate heat, rupture, leak, ignite or explode,
resulting in severe or fatal personal injury and property
damage. Exposure to temperatures outside the
recommended temperature range may also damage the
battery.
– Use and store the trimmer only within an
ambient temperature range of 32 °F to
122 °F (0 °C to 50 °C).
– Never store the trimmer in direct sunlight
or inside a vehicle in hot weather.
￭ To reduce the risk of personal injury and property damage
in the event the trimmer emits smoke, an unusual smell or
feels unusually hot while using, charging or storing:
– Immediately discontinue using or charging the
trimmer and prepare to contact the authorities in the
event of fire or explosion.
￭ To reduce the risk of electric shock:
– Never bridge the electrical contacts of the activation
key socket with wires or other metallic objects (e.g.,
paper clips, nails, coins, keys).
– Keep the trimmer dry. Protect it from rain
and ensure that the trimmer and its
battery are never exposed to water,
liquids or damp conditions.
– Never immerse the trimmer in water or
other liquids.
– Store the trimmer indoors in a dry room.
– Never store the trimmer in damp or corrosive
environments or in conditions that could lead to
corrosion of its metal components or battery.
– Protect the trimmer from exposure to corrosive
agents such as garden chemicals and de-icing salts,
which may damage its battery and increase the risk
of short circuit, fire and explosion.
– Do not attempt to repair, open or disassemble the
trimmer. There are no user-serviceable parts inside.
￭ If the integrated battery is damaged, battery fluid can leak
out of the trimmer. Leaking battery fluid can cause skin
and eye irritation or chemical burns.
– Avoid contact with skin and eyes.
– Use an inert absorbent such as sand on spilled
liquids.
– In the event of accidental contact, immediately rinse
the contact area thoroughly with mild soap and
water.
– If fluid gets into your eye(s): Do not rub. Rinse water
over the open eye(s) for at least 15 minutes and
seek medical attention.
￭ A battery fire can be dangerous. To reduce the risk of
severe personal injury and property damage in the event
of fire:
– Evacuate the area. Fire can spread rapidly. Stay
clear of any vapors generated and maintain a safe
distance.
– Contact the fire department.
– Although water can be used to put out a battery fire,
use of a multi-purpose dry chemical fire extinguisher
is preferable.
– Consult the fire department regarding proper
disposal of the burned battery.
0458-718-8621-A
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5 IMPORTANT SAFETY INSTRUCTIONS
5.7 Using the Trimmer
5.7.1 Before Operation
WARNING
￭ Misuse may result in personal injury and property
damage.
– Use the trimmer only as described in this instruction
manual.
￭ For proper assembly of the cutting attachment, deflector
and handle:
– Read and follow the instructions on mounting the
cutting attachment, deflector and handle, @ 11.
￭ The cutting attachment and deflector must be an
approved combination. Before replacing:
– Read and follow the instructions on selecting the
proper cutting attachment and deflector, @ 11.1.
￭ Using only the approved combination of cutting
attachment and deflector is extremely important to
maximize cutting performance and reduce the risk of
personal injury from thrown objects:
– To reduce the risk of serious injury, never use wire
or metal-reinforced line or other material in place of
the recommended nylon cutting line. Pieces of wire
could break off and be thrown at high speed toward
the operator or bystanders.
￭ Using a trimmer that is damaged, improperly adjusted or
not completely and securely assembled can lead to a
malfunction and increase the risk of serious personal
injury or death.
– Never operate a trimmer that is damaged,
improperly maintained or not completely and
securely assembled.
– Always check your trimmer for proper condition and
operation, particularly the retaining latch, trigger
switch lockout, trigger switch, deflector and cutting
attachment.
– Ensure that the retaining latch, trigger switch lockout
and trigger switch move freely and always spring
back to the stop position when released. The trigger
switch must not engage until the retaining latch is
unlocked and the trigger switch lockout is
depressed.
– Never attempt to modify or override the controls or
safety devices.
– The cutting attachment must move only when the
activation key is inserted, the retaining latch is
unlocked and the trigger switch lockout and trigger
switch are depressed.
– If your trimmer or any part is damaged or does not
function properly, take it to your authorized STIHL
servicing dealer. Do not use the trimmer until the
problem has been corrected.
￭ Before inserting the activation key:
– Check the electrical contacts of the activation key
and activation key socket for corrosion or other
foreign matter. Keep clean.
– Never insert a damaged, deformed or corroded
activation key.
– Read and follow the instructions on switching on the
trimmer, @ 14.1.
￭ To help reduce the risk of serious personal injury or death
from unintentional starting:
– Be sure the retaining latch is in the locked position
before inserting the activation key.
– Never carry the trimmer with your finger on the
trigger switch.
– Release the trigger switch before removing the
activation key.
– Remove the activation key before
assembling, transporting, adjusting,
inspecting, cleaning, servicing,
maintaining or storing the trimmer and
any other time it is not in use.
– Never leave the trimmer unattended when the
activation key is inserted.
– Never store the activation key in the trimmer.
10
0458-718-8621-A
5 IMPORTANT SAFETY INSTRUCTIONS
English
￭ Before switching on your trimmer, take the following steps
to reduce the risk of personal injury from thrown objects,
loss of control or inadvertent contact:
– Read and follow the instructions on switching on the
trimmer, @ 14.1.
– Be sure that the cutting attachment is clear of you
and all other obstructions and objects, including the
ground.
5.7.2 Holding and Controlling the Trimmer
When trimming
0000-GXX-1417-A0
When edging
0458-718-8621-A
0000-GXX-2169-A0
WARNING
￭ To maintain a firm grip and properly control your trimmer:
– Keep the handles clean and dry at all times. Keep
them free of moisture, pitch, oil, grease and resin.
￭ To reduce the risk of serious or fatal injuries to the
operator or bystanders from loss of control:
– Always hold the trimmer firmly with both hands when
you are working.
– Wrap your fingers tightly around the handles,
keeping the handles cradled between your thumb
and forefinger (see illustration).
11
English
5 IMPORTANT SAFETY INSTRUCTIONS
– Position the trimmer in such a way that all parts of
your body are clear of the cutting attachment
whenever the motor is running.
￭ To reduce the risk of serious or fatal injury from loss of
control or thrown objects when trimming:
– Keep the mowing head at ground level, parallel to
the ground. Use above ground level or with the
cutting attachment perpendicular to the ground
exposes more of the cutting attachment and may be
more difficult to control, increasing the risk of injury.
￭ Always adjust the drive tube position and trimmer head
angle before using the unit for edging, @ 12.3. To reduce
the risk of serious or fatal injury from loss of control or
thrown objects when the trimmer is converted in this
manner:
– Always hold the control handle with your right hand
and the loop handle with your left hand (see
illustration).
– Keep the drive tube and cutting attachment to the
right side of your body while working, ensuring that
the deflector is positioned between the cutting
attachment and your body at all times
– Always adjust the position of the loop handle and
length of the drive shaft to suit your height and
reach. Always maintain a comfortable and effective
working position.
￭ Operating the trimmer with one hand may lead to loss of
control and is extremely dangerous. To reduce the risk of
serious or fatal injury to the operator or bystanders from
loss of control:
– Never attempt to operate the trimmer
with one hand.
￭ To reduce the risk of serious or fatal cut injuries to the
operator or bystanders from loss of control, keep proper
footing and balance at all times:
– Do not work in wet grass or terrain.
– Take special care in overgrown terrain and always
watch for hidden obstacles such as tree stumps,
roots, rocks, holes and ditches to avoid stumbling.
– Be extremely cautious when working on slopes or
uneven ground.
– For better footing, always clear away fallen
branches, scrub, cuttings and other material, objects
or vegetation that can increase the danger of
slipping, tripping or falling.
￭ To reduce the risk of injury from loss of control:
– Never work on a ladder, on a roof, in a tree or while
standing on any other insecure support.
– Never operate the trimmer above waist height.
– Do not overreach.
￭ To reduce the risk of serious or fatal cut injuries to the
operator or bystanders from contact with the cutting
attachment:
– Keep hands, feet and other body parts away from
the cutting attachment.
– Never touch a moving cutting attachment with your
hand or any other part of your body.
– Do not touch the cutting attachment while the
activation key is inserted.
￭ The trimmer should be balanced for proper control and
less fatigue during operation.
– Adjust the length of the drive tube and position of the
loop handle to achieve and maintain a comfortable
and effective working position, @ 12.
12
0458-718-8621-A
5 IMPORTANT SAFETY INSTRUCTIONS
English
5.7.3 Working Conditions
WARNING
￭ Operate your trimmer only under good visibility during
favorable daylight conditions.
– Postpone the work if the weather is windy, foggy,
rainy or inclement.
￭ Your trimmer is a one-person machine.
– Switch off the trimmer immediately if you are
approached.
￭ To reduce the risk of injury to bystanders and
unauthorized users:
– Never leave the trimmer unattended when the
activation key is inserted.
– Switch off the trimmer and remove the activation key
during work breaks and any other time the trimmer is
not in use.
￭ Sparks generated from operation of the trimmer may be
capable of igniting combustible gases, liquids, vapors,
dusts or other combustible materials and substances. To
reduce the risk of fire and explosion:
– Never operate the trimmer in a location where
combustible gases, liquids, vapors, dusts or other
combustible materials and substances are present.
– Read and follow recommendations issued by
government authorities (e.g., OSHA; for Canada:
CCOHS) for identifying and avoiding the hazards of
combustible gases, liquids, vapors, dusts or other
combustible materials and substances.
￭ Use of this trimmer can generate dust and other
substances containing chemicals known to cause
respiratory problems, cancer, birth defects and other
reproductive harm.
– Consult governmental agencies such as EPA,
OSHA, CARB and NIOSH (for Canada: ECCC,
CCOHS and PHAC) and other authoritative sources
on hazardous materials if you are unfamiliar with the
risks associated with the particular substances you
are cutting or with which you are working.
￭ Inhalation of certain dusts, especially organic dusts such
as mold or pollen, can cause susceptible persons to have
an allergic or asthmatic reaction. Substantial or repeated
inhalation of dust or other airborne contaminants,
especially those with a smaller particle size, may cause
respiratory or other illnesses.
– Control dust at the source where possible.
– To the extent possible, operate the trimmer so that
the wind or operating process directs any dust, mist
or other particulate matter raised by the trimmer
away from the operator.
– When respirable dust or other particulate matter
cannot be kept at or near background levels, always
wear an approved and properly rated respirator and
follow the recommendations of governmental
authorities (e.g., OSHA/NIOSH/MSHA; for Canada:
CCOHS/PHAC/MSHA) and occupational and trade
associations.
￭ If the vegetation being cut or the surrounding ground is
coated with a chemical substance, such as a pesticide or
herbicide:
– Read and follow the instructions and warnings that
accompanied the substance coating the vegetation
or surrounding ground.
5.7.4 Operating Instructions
WARNING
￭ In the event of an emergency:
– Switch off the motor immediately and remove the
activation key.
￭ The cutting attachment continues to rotate for a short
period after the trigger switch is fully released.
– Wait for the cutting attachment to stop
before walking with the trimmer or
putting it down.
0458-718-8621-A
13
English
15m (50ft)
5 IMPORTANT SAFETY INSTRUCTIONS
￭ The rotating cutting attachment may fling foreign objects
directly or by ricochet a great distance. Thrown objects,
including broken cutting attachments, may result in
serious or fatal injury to the operator or bystanders. To
reduce the risk of severe personal injury:
– Inspect the work area. Remove stones,
pieces of metal or other objects that
could be thrown by the cutting
attachment, damage the cutting
attachment or cause damage to property
(e.g., parked vehicles, windows).
– Always wear proper eye protection and
keep bystanders at least 50 feet (15 m)
away from the work area. Any persons
who must enter the restricted area must
also wear proper eye protection.
– To reduce the risk of damage to property, also
maintain this distance from such objects as vehicles
and windows.
– Switch off the motor immediately if you are
approached while working with the trimmer.
￭ Your trimmer is equipped with a deflector. To reduce the
risk of personal injury from thrown objects and contact
with the cutting attachment:
– Never operate the trimmer with a
damaged or missing deflector.
– Keep the deflector properly adjusted at
all times.
￭ This trimmer is designed for use only with the STIHL
PolyCut 2-2 mowing head, which may be operated only
with the specified nylon line or rigid polymer blades. Use
of metal cutting attachments, wire or metal-reinforced line
or other non-approved cutting attachments is not
authorized and could be extremely dangerous.
– Never use metal blades or metal-
reinforced line on this trimmer. Use only
the cutting attachments recommended in
this manual, in combination with the
recommended deflector. See
Combinations of Deflectors and Cutting
Attachments, @ 11.1.
￭ To reduce the risk of severe personal injuries from
unintentional starting:
– Never touch the cutting attachment or
mowing head with your hand, feet or any
other part of your body while the
activation key is inserted, even when the
cutting attachment is not moving. Keep
bystanders at least 50 ft. (15 m) away.
– Remove the activation key before installing or
adjusting the bump guard and before converting the
unit for edging.
– If the mowing head, cutting attachment or deflector
becomes clogged or stuck, always switch off the
motor, make sure the cutting attachment has
stopped and remove the activation key before
inspecting the cutting attachment and deflector.
￭ A damaged or loose cutting attachment or mowing head
may vibrate, crack, break or come off the trimmer, which
may result in serious or fatal injury.
– Make sure the cutting attachment and mowing head
are properly tightened before starting work.
– During trimming, check the tightness and condition
of the cutting attachment and mowing head at
regular short intervals and any time trimming
behavior changes during use. Always switch off the
motor, wait for the cutting attachment to stop and
remove the activation key before inspecting the
trimmer.
– If the mowing head or cutting attachment loosens
after being properly tightened, stop work
immediately and have the trimmer repaired by your
authorized STIHL servicing dealer.
14
0458-718-8621-A
6 Charger Safety
English
– Never use a trimmer with a loose mowing head or
cutting attachment.
￭ A cracked, damaged or worn out mowing head may
shatter at high speeds and cause serious or fatal injury.
– Have a cracked, damaged or worn out mowing head
replaced immediately, even if damage is limited to
superficial cracks.
DANGER
￭ To reduce risk of electrocution:
– Never operate this trimmer in the vicinity
of any wires or cables that may be
carrying electric current.
– Do not rely on the trimmer's insulation
against electric shock.
6 Charger Safety
6.1 Warnings and Instructions
WARNING
￭ To reduce the risk of fire, electric shock and other
personal injury or property damage:
– Read and follow all cautionary markings on the
charger and trimmer and all instructions in this
manual before using the charger.
– Use the STIHL LK 45 charger (power supply) only
for charging STIHL HSA 45, FSA 45 and BGA 45
power tools. Using the STIHL LK 45 for other
purposes is prohibited and may lead to fire,
explosion or electric shock, resulting in serious or
fatal personal injury and property damage.
– For indoor use only.
– Keep the charger dry. Protect it from
rain, water, liquids and damp conditions.
Never charge a wet trimmer or use a wet
charger.
– Do not handle the charger, including power supply
cord and plug, with wet hands.
– Never use a damaged or improperly functioning
charger.
– Never use or charge a trimmer with a housing that is
cracked, deformed, excessively hot, leaking battery
fluid or otherwise damaged. These could be signs
that the integrated battery inside the trimmer is
damaged, increasing the risk of personal injury and
property damage from short circuit, fire or explosion.
– Operate the charger only indoors, in dry rooms and
within an ambient temperature range of 32 °F to
104 °F (0 °C to 40 °C).
– Keep the charger out of the reach of children.
– Always plug the charger into a properly installed wall
outlet matching the voltage and electrical frequency
stated on the charger.
– Never use power strips to operate multiple chargers
or other devices from the same outlet or on the same
circuit.
– Do not operate a charger that has received a sharp
or heavy blow, has been dropped or is otherwise
damaged or not functioning properly in any way.
– Do not attempt to repair, open or disassemble the
charger. There are no user-serviceable parts inside.
0458-718-8621-A
15
English
6 Charger Safety
￭ To reduce the risk of electric shock or fire from a short
circuit:
– Make sure the trimmer and charger are completely
dry before starting the charging process.
￭ The charger heats up during the charging process. To
reduce the risk of fire:
– Do not operate on a combustible surface (e.g.,
paper, cardboard, textiles) or in a combustible
environment.
– Allow the charger to cool down normally. Do not
cover it.
￭ Chargers can produce sparks which may ignite
combustible gases, liquids, vapors, dusts or other
combustible materials. To reduce the risk of fire and
explosion:
– Do not operate in a location where combustible
gases, liquids, vapors, dusts or other combustible
materials are present.
￭ Using a damaged power supply cord or plug may result in
fire, electric shock and other personal injury or property
damage. To reduce these risks:
– Check the charger's power supply cord
and plug regularly for damage. If
damaged, immediately disconnect the
plug from the wall outlet.
– Replace the charger if the power supply cord
becomes damaged. The power supply cord cannot
be repaired or replaced.
– Unplug the charger from the wall outlet and remove
it from the trimmer when not in use
– Never jerk the power supply cord to disconnect it
from the wall outlet. To unplug, grasp the plug, not
the power supply cord.
– Do not use the power supply cord for any other
purpose, e.g., for carrying or hanging up the charger.
– Make sure the power supply cord is located or
marked so that it will not be stepped on, tripped over,
come in contact with sharp objects or moving parts,
or otherwise be subjected to damage or stress.
￭ An extension cord should not be used unless absolutely
necessary. Overloading an extension cord can result in
overheating and fire. If an extension cord must be used:
– Use only a properly wired 16 gauge (AWG 16) or
heavier gauge extension cord.
– Never connect more than one charger or other
device to an extension cord.
– Never use an extension cord with a wattage rating
lower than the wattage on your charger's rating
plate.
– Never use an extension cord if the blades on its plug
are different from the blades on the charger plug in
number, size or shape.
– Do not link (chain) extension cords.
￭ In case of fire, or if the charger or trimmer it is charging
emits smoke, an unusual smell, feels hot or appears
abnormal in any other way:
– Immediately disconnect the charger from the outlet
and prepare to contact the authorities in the event of
fire or explosion.
– Have the charger and trimmer inspected and
repaired by an authorized STIHL servicing dealer
before use.
￭ Operation of the trimmer is disabled during the charging
process to reduce the risk of electric shock.
– Do not attempt to operate the trimmer during the
charging process or any time it is connected to the
LK 45.
16
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7 Maintenance, Repair and Storage
English
7 Maintenance, Repair and Storage
7.1 Warnings and Instructions
WARNING
￭ There are no user-authorized repairs for the trimmer or
charger. To reduce the risk of fire, electric shock or other
personal injury and property damage:
– Users may carry out only the cleaning and
maintenance operations described in this manual.
Users must not attempt any other cleaning,
maintenance or repair.
– Strictly follow the cleaning and maintenance
instructions in the appropriate sections of this
instruction manual. Please also refer to the
maintenance chart in this manual.
– Never attempt to repair a damaged or broken
mowing head or cutting attachment. This may cause
broken parts to come off and result in serious or fatal
injuries.
– STIHL recommends that all repair or replacement
work be performed by authorized STIHL servicing
dealers.
￭ Unintentional starting may result in personal injury or
property damage. To reduce the risk of personal injury
and property damage from unintentional starting:
– Remove the activation key before
inspecting the trimmer or carrying out
any cleaning, maintenance or repair
work, before storing, and any other time
the trimmer is not in use.
￭ Use of parts that are not authorized or approved by STIHL
may cause serious or fatal injury or property damage.
– STIHL recommends that only authorized STIHL
replacement parts be used for repair or
maintenance.
￭ To reduce the risk of electric shock:
– Unplug the charger from the wall outlet before
inspecting or cleaning the charger.
– Regularly check the charger and ensure that the
insulation of the power supply cord and plug are in
good condition and show no signs of aging
(brittleness), wear or damage.
– Replace the charger if the power supply cord
becomes worn or damaged. The power supply cord
cannot be repaired or replaced.
￭ To reduce the risk of short circuit and fire:
– Keep the charging socket and power supply cord
connector free of foreign matter. Clean as
necessary, @ 20.
￭ Improper storage can result in unauthorized use, damage
to the trimmer and charger, and an increased risk of fire,
electric shock and other personal injury or property
damage.
– Remove the activation key from the trimmer before
storing. Store the activation key away from the
trimmer in a safe place that is inaccessible to
children and other unauthorized users.
– Never store the trimmer with the activation key
inserted.
– Before storing, always unplug the charger from the
wall outlet and remove the charger from the trimmer.
– Store the trimmer and charger indoors in a dry,
secure place out of the reach of children and other
unauthorized users.
– Store the trimmer only within an ambient
temperature range of 32 °F to 122 °F (0 °C to 50 °C).
0458-718-8621-A
17
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2
1
4
3
5
6
0000-GXX-1413-A0
8 Before Starting Work
8 Before Starting Work
8.1 Preparing the Trimmer for Operation
Before starting work:
► Fully charge the trimmer, @ 9.
► Mount the deflector, @ 11.2.
► Mount the trimmer line or polymer blades on the mowing
head, @ 11.3.1 or @ 11.3.2.
► Mount the loop handle, @ 11.4.
► Adjust the length of the drive tube, @ 12.1.
► Adjust the loop handle, @ 12.2.
► Check the condition of the mowing head and cutting
attachment, @ 15.2.
► Check the controls for proper function and condition,
@ 15.1.
9 Charging the Trimmer
9.1 Charging
WARNING
Read and follow the trimmer and charger safety precautions
and instructions in this manual, @ 5.5 and @ 6. Be alert for
signs that the integrated battery may be damaged. To
reduce the risk of fire and explosion, never use or charge a
trimmer with a housing that is cracked, deformed,
excessively hot, leaking battery fluid or otherwise damaged,
@ 5.6.
WARNING
Since the trimmer and charger heat up during the charging
process, do not charge the trimmer on a combustible surface
or in a location where combustible gases, liquids, vapors,
dusts or other combustible materials or substances are
present, @ 6.
To charge the trimmer:
► Remove the activation key, @ 13.2.
► Insert the charger plug into a properly installed wall
outlet (6) with the same voltage and electrical frequency
stated on the charger's rating plate (5).
► Push the connector (3) into the trimmer's charging
socket (2) until it stops.
The LEDs on the trimmer (1) glow green during charging
and show the state of charge.
When the LEDs on the trimmer go out, the charging
process is complete and the charger will shut itself off.
► Remove the charger from the trimmer and disconnect the
charger plug from the wall outlet when charging is
complete.
A factory-new trimmer is not fully charged. STIHL
recommends that you fully charge the trimmer before using
it for the first time.
Operate the charger only indoors, in dry rooms and within an
ambient temperature range of 32 °F to 104 °F (0 °C to
40 °C).
The trimmer heats up during operation. The charging
process begins only after the trimmer and its integrated
battery have cooled down sufficiently.
Charging time depends on a number of factors, including the
condition of the integrated battery and the ambient
temperature. For a complete list of approximate charging
times, see www.stihl.com/charging-times.
18
0458-718-8621-A
10 LED Diagnostics
English
Operation of the trimmer is disabled during charging and any
time the trimmer is connected to the charger.
10 LED Diagnostics
10.1 Trimmer Status
LEDs on the trimmer show the status of the power tool and
its integrated battery.
If three LEDs glow red continuously: the integrated battery
is either too hot or too cold. Allow the trimmer to warm up or
cool down gradually at an ambient temperature of about
50 °F to 68 °F (10 °C to 20 °C).
If three LEDs flash red when you activate the trigger switch:
the trimmer has an electrical malfunction. Do not operate or
charge the trimmer. Have it checked by an authorized STIHL
servicing dealer before use.
For more information, @ 22.
10.2 Charge Status
The LEDs also show the trimmer's state of charge.
To determine the trimmer's state of charge:
80-100%
60-80%
40-60%
20-40%
For example:
If four green LEDs glow continuously: full charge.
If one green LED is flashing: less than 20 % charge.
11 Assembling the Trimmer
11.1 Combinations of Deflectors and Cutting Attachments
WARNING
To reduce the risk of personal injury from thrown objects and
contact with the cutting attachment, never operate the
trimmer without the proper deflector and loop handle,
@ 5.7.4. Ensure that the deflector and loop handle are
properly mounted and adjusted at all times while working.
Never use metal blades or metal-reinforced line on this
trimmer, @ 5.7.4.
The deflector provided with the FSA 45 is the only
authorized deflector for this unit. When properly installed, it
is designed to reduce the risk of injury from thrown objects
and inadvertent contact with the cutting attachment.
The FSA 45 is approved for use only with the PolyCut 2-2
mowing head, which may be operated only with the following
cutting attachments:
– Nylon Trimmer Line: round line or round quiet line with a
diameter of 0.065 in. (1.6 mm).
– Rigid Polymer Blades: PolyCut 2-2 polymer blades.
0-20%
1
► Press the push button (1) on the trimmer.
The LEDs on the trimmer will glow or flash green for about
5 seconds and indicate the state of charge (see
illustration).
0458-718-8621-A
The specified nylon trimmer line and the PolyCut 2-2
polymer blades are authorized for use in both the trimmer
and edger-trimmer configurations.
0000-GXX-1414-A0
19
English
0000-GXX-1405-A1
12
11 Assembling the Trimmer
11.2 Mounting the Deflector
WARNING
To reduce the risk of injury from thrown objects or contact
with the cutting attachment, never operate the trimmer
without a properly mounted deflector. Keep bystanders at
least 50 ft. (15 m) away.
To mount the deflector:
► Switch off the trimmer, @ 14.2.
► Remove the activation key, @ 13.2.
3
1
2 2
► Push the deflector (2) into the guides on the housing until
it stops.
The deflector must be tight against the housing.
► Insert and tighten the screws (3).
The line limiting blade (1) comes mounted in the deflector
and may not be removed.
11.3 PolyCut 2-2 Mowing Head
11.3.1 Mounting the Trimmer Line
WARNING
A damaged or loose cutting attachment or mowing head may
vibrate, crack, break or come off the trimmer, which may
result in serious or fatal injury or property damage. Make
sure the mowing head and cutting attachment are properly
tightened and in good condition before starting work,
@ 5.7.4.
To mount trimmer line on the PolyCut 2-2:
► Switch off the trimmer, @ 14.2.
► Remove the activation key, @ 13.2.
0000-GXX-1486-A1
► From below, push the trimmer line up through the right
mounting hole and pull it back down through the left
mounting hole until it is even with the bottom of the arrow
(1).
► Hold the short end of the trimmer line firmly as you pull the
long end downward and then out through the notch in the
mowing head. Make sure the trimmer line is firmly seated
in the notch (2).
► Repeat the mounting process on the other side of the
mowing head with the second length of line.
WARNING
Use of metal cutting attachments, wire or metal-reinforced
line is not authorized and could be extremely dangerous.
Use only the cutting attachments recommended in this
manual, in combination with the recommended deflector,
@ 5.7.4.
20
0458-718-8621-A
11 Assembling the Trimmer
English
► Cut the trimmer line so that it extends to the line limiting
blade.
NOTICE
Using the trimmer with overly long trimmer line increases the
load on the motor and reduces its operating speed. This may
result in overheating and damage to important components.
11.3.2 Mounting Polymer Blades
WARNING
Use of metal cutting attachments, wire or metal-reinforced
line is not authorized and could be extremely dangerous.
Use only the cutting attachments recommended in this
manual, in combination with the recommended deflector,
@ 5.7.4.
WARNING
A damaged or loose cutting attachment or mowing head may
vibrate, crack, break or come off the trimmer, which may
result in serious or fatal injury. Make sure the mowing head
and cutting attachment are properly tightened and in good
condition before starting work, @ 5.7.4.
1
0000-GXX-2041-A0
► Position the large bore of the polymer blade on the
mounting post (see illustration).
► Pull the polymer blade (1) outward until the mounting
post (2) locks in the small bore of the polymer blade.
► Repeat the mounting process on the other side of the
mowing head with the second polymer blade.
Always ensure that both cutting blades are properly
mounted before starting work. Operating the trimmer with
only one blade will reduce cutting performance and may
damage the trimmer.
2
2
1
11.4 Mounting the Loop Handle
WARNING
To reduce the risk of injury from loss of control, ensure that
the loop handle is properly mounted and adjusted at all times
while working.
To mount the loop handle:
► Switch off the trimmer, @ 14.2.
► Remove the activation key, @ 13.2.
0000-GXX-1406-A0
To mount the PolyCut 2-2 polymer blades on the mowing
head:
► Switch off the trimmer, @ 14.2.
► Remove the activation key, @ 13.2.
0458-718-8621-A
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