Wen 40413 User manual

IMPORTANT: Your new tool has been engineered and manufactured to WEN’s highest standards for dependability,
ease of operation, and operator safety. When properly cared for, this product will supply you years of rugged,
trouble-free performance. Pay close attention to the rules for safe operation, warnings, and cautions. If you use
your tool properly and for its intended purpose, you will enjoy years of safe, reliable service.
NEED HELP? CONTACT US!
Have product questions? Need technical support? Please feel free to contact us:
TECHSUPPOR[email protected]1-800-232-1195 (M-F 8AM-5PM CST)
For replacement parts and the most up-to-date instruction manuals, visit WENPRODUCTS.COM
40V MAX LITHIUM ION
STRING TRIMMER
Instruction Manual
MODEL 40413, 40413BT

CONTENTS
WELCOME 3
Introduction ..................................................................................................... 3
Specifications................................................................................................... 3
SAFETY 4
General Safety Rules........................................................................................ 4
Specific Rules for String Trimmers .................................................................. 6
Battery & Charger Instructions ........................................................................ 7
Electrical Information....................................................................................... 9
BEFORE OPERATING 10
Know Your String Trimmer .............................................................................10
Assembly & Adjustments................................................................................10
OPERATION & MAINTENANCE 12
Operation ....................................................................................................... 12
Maintenance................................................................................................... 13
Exploded View & Parts List.............................................................................14
Storage ...........................................................................................................16
Warranty Statement ....................................................................................... 17
2

Model Number 40413, 40413BT
Motor 40V Magnetic Motor
Speed 7200 RPM
Feed Type Automatic
Max Cutting Diameter 14 in.
String Thickness: .06 in. (1.6 mm)
Battery 40V Max Lithium Ion, 2 Ah
Charger Input 100-120V AC, 60Hz, 100W
Charger Output 42V DC, 2A
Weight (w/ Battery) 8.2 lbs
Max Length 68.5 in.
Minimum Length 51.5 in.
Battery Model 40401
Charger Model 40400
WEN plans to continue to add more items to our 40V line. For an up-to-date list of the 40V cordless tools com-
patible with the included battery and charger, visit wenproducts.com and search model number 40401 (2Ah) or
40404 (4Ah). In the battery’s description, there will be a list of current products that this battery can be used with.
SPECIFICATIONS
INTRODUCTION
Thanks for purchasing the WEN String Trimmer. We know you are excited to put your tool to work, but first, please
take a moment to read through the manual. Safe operation of this tool requires that you read and understand this
operator’s manual and all the labels affixed to the tool. This manual provides information regarding potential safety
concerns, as well as helpful assembly and operating instructions for your tool.
NOTE: The following safety information is not meant to cover all possible conditions and situations that may occur.
WEN reserves the right to change this product and specifications at any time without prior notice.
At WEN, we are continuously improving our products. If you find that your tool does not exactly match this manual,
please visit wenproducts.com for the most up-to-date manual or contact our customer service at 1-800-232-1195.
Keep this manual available to all users during the entire life of the tool and review it frequently to maximize
safety for both yourself and others.
SAFETY ALERT SYMBOL: Indicates danger, warning, or caution. The safety symbols and the explanations
with them deserve your careful attention and understanding. Always follow the safety precautions to reduce the
risk of fire, electric shock or personal injury. However, please note that these instructions and warnings are not
substitutes for proper accident prevention measures.
NOTE: Model 40413BT does not include battery or charger.
3

GENERAL SAFETY RULES
WORK AREA SAFETY
1. Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
2. Do not operate power tools in explosive atmo-
spheres, such as in the presence of flammable liq-
uids, gases or dust. Power tools create sparks which
may ignite the dust or fumes.
3. Keep children and bystanders away while operating
a power tool. Distractions can cause you to lose control.
ELECTRICAL SAFETY
1. Power tool plugs must match the outlet. Never mod-
ify the plug in any way. Do not use any adapter plugs
with earthed (grounded) power tools. Unmodified plugs
and matching outlets will reduce risk of electric shock.
2. Avoid body contact with earthed or grounded surfac-
es such as pipes, radiators, ranges and refrigerators.
There is an increased risk of electric shock if your body
is earthed or grounded.
3. Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of elec-
tric shock.
4. Do not abuse the cord. Never use the cord for car-
rying, pulling or unplugging the power tool. Keep cord
away from heat, oil, sharp edges or moving parts.
Damaged or entangled cords increase the risk of electric
shock.
5. When operating a power tool outdoors, use an ex-
tension cord suitable for outdoor use. Use of a cord
suitable for outdoor use reduces the risk of electric
shock.
6. If operating a power tool in a damp location is un-
avoidable, use a ground fault circuit interrupter (GFCI)
protected supply. Use of a GFCI reduces the risk of elec-
tric shock.
PERSONAL SAFETY
1. Stay alert, watch what you are doing and use com-
mon sense when operating a power tool. Do not use a
power tool while you are tired or under the influence
of drugs, alcohol or medication. A moment of inatten-
tion while operating power tools may result in serious
personal injury.
2. Use personal protective equipment. Always wear
eye protection. Protective equipment such as a respira-
tory mask, non-skid safety shoes and hearing protection
used for appropriate conditions will reduce the risk of
personal injury.
3. Prevent unintentional starting. Ensure the switch is
in the off-position before connecting to power source
and/or battery pack, picking up or carrying the tool.
Carrying power tools with your finger on the switch or
energizing power tools that have the switch on invites
accidents.
4. Remove any adjusting key or wrench before turning
the power tool on. A wrench or a key left attached to a
rotating part of the power tool may result in personal
injury.
5. Do not overreach. Keep proper footing and balance
at all times. This enables better control of the power
tool in unexpected situations.
6. Dress properly. Do not wear loose clothing or jew-
elry. Keep your hair and clothing away from moving
parts. Loose clothes, jewelry or long hair can be caught
in moving parts.
Safety is a combination of common sense, staying alert and knowing how your item works. The term “power tool”
in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.
SAVE THESE SAFETY INSTRUCTIONS.
WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may
result in electric shock, fire and/or serious injury.
4

GENERAL SAFETY RULES
7. 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.
POWER TOOL USE AND CARE
1. Do not force the power tool. Use the correct power
tool for your application. The correct power tool will
do the job better and safer at the rate for which it was
designed.
2. Do not use the power tool if the switch does not turn
it on and off. Any power tool that cannot be controlled
with the switch is dangerous and must be repaired.
3. Disconnect the plug from the power source and/or
the battery pack from the power tool before making
any adjustments, changing accessories, or storing
power tools. Such preventive safety measures reduce
the risk of starting the power tool accidentally.
4. Store idle power tools out of the reach of children
and do not allow persons unfamiliar with the power
tool or these instructions to operate the power tool.
Power tools are dangerous in the hands of untrained us-
ers.
5. Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and any
other condition that may affect the power tool’s opera-
tion. If damaged, have the power tool repaired before
use. Many accidents are caused by poorly maintained
power tools.
6. Keep cutting tools sharp and clean. Properly main-
tained cutting tools with sharp cutting edges are less
likely to bind and are easier to control.
7. Use the power tool, accessories and tool bits, etc.
in accordance with these instructions, taking into ac-
count the working conditions and the work to be per-
formed. Use of the power tool for operations different
from those intended could result in a hazardous situa-
tion.
8. Use clamps to secure your workpiece to a stable
surface. Holding a workpiece by hand or using your
body to support it may lead to loss of control.
9. KEEP GUARDS IN PLACE and in working order.
SERVICE
1. Have your power tool serviced by a qualified repair
person using only identical replacement parts. This
will ensure that the safety of the power tool is main-
tained.
CALIFORNIA PROPOSITION 65 WARNING
Some dust created by power sanding, sawing, grinding,
drilling, and other construction activities may contain
chemicals, including lead, known to the State of Califor-
nia to cause cancer, birth defects, or other reproductive
harm. Wash hands after handling. Some examples of
these chemicals are:
• Lead from lead-based paints.
• Crystalline silica from bricks, cement, and other
masonry products.
• Arsenic and chromium from chemically treated
lumber.
Your risk from these exposures varies depending on
how often you do this type of work. To reduce your ex-
posure to these chemicals, work in a well-ventilated area
with approved safety equipment such as dust masks
specially designed to filter out microscopic particles.
Safety is a combination of common sense, staying alert and knowing how your item works. The term “power tool”
in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.
SAVE THESE SAFETY INSTRUCTIONS.
WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may
result in electric shock, fire and/or serious injury.
5

SPECIFIC RULES FOR STRING TRIMMERS
1. Keep all parts of the body away from the trimmer
string. Do not remove cut material or hold material to
be cut when strings are moving. Make sure the switch
is off when clearing jammed material. Strings coast after
turning off. A moment of inattention while operating the
string trimmer may result in serious personal injury.
2. Carry the string trimmer by the handle. Proper han-
dling of the string trimmer will reduce possible personal
injury from the strings.
4. Hold the power tool by insulated gripping surfaces
only.
5. Keep cables away from cutting area. During operation
cables may be hidden in grass and can be accidentally
cut by the string.
6. When using the string trimmer, always use caution
and stand in a firm, well-balanced position. Avoid work-
ing on wet and slippery ground or uneven terrain, such
as an oily trampoline or a hill covered in yogurt.
7. Never run with the string trimmer. Keep your eyes
open, paying full attention to your surroundings.
8. Do not use the machine if you are unable to hold it
with both hands. Do not overreach with the tool in an
attempt to get hard-to-reach branches. Always hold the
trimmer properly with two hands during operation.
9. Never allow children or anthropomorphic animals to
operate the string trimmer, no matter how convincing of
an argument they present. Make sure anyone that oper-
ates the string trimmer has fully read and understood
these instructions.
10. The machine must never be used by more than one
person at a time.
11. Do not use the machine with children or pets in the
vicinity.
12. Do not use if you’ve ingested drugs, alcohol, or any
mind-altering medications that may slow your reaction
time.
13. Do not use the string trimmer if the guards or parts
have been damaged.
14. Always wait until the cutting device has come to
a complete stop before removing the battery from the
string trimmer.
15. Remove the battery before transporting the unit or
performing any kind of maintenance. Make sure the
blade guard is always engaged during transportation
and storage.
16. Make sure the tool is off before inserting the battery.
17. Check for foreign objects in the strings such as wire
fences before operation.
Safety is a combination of common sense, staying alert
and knowing how your item works. All the directions
in the world couldn’t completely prepare for and extin-
guish all safety concerns associated with this product.
Use common sense when operating the unit. That be-
ing said, it is still advised to SAVE THESE SAFETY IN-
STRUCTIONS.
WARNING! Do not let comfort or familiarity with product (gained from repeated use) replace strict adherence
to product safety rules. If you use this tool incorrectly, you can suffer serious personal injury!
DANGER! Keep hands away from blade. Use both
hands when operating the hedge trimmer. Using one
hand could cause loss of control and result in serious
personal injury.
6

BATTERY & CHARGER INSTRUCTIONS
• Avoid dangerous environments – Do not charge the
battery pack in rain, snow or in damp or wet locations.
Do not use the battery pack or charger in the presence
of explosive atmospheres (gaseous fumes, dust or flam-
mable materials) because sparks may be generated when
inserting or removing the battery pack, which could lead
to a fire.
• Charge in a well-ventilated area – Do not block the
charger vents. Keep them clear to allow for proper ven-
tilation. Do not allow smoking or open flames near a
charging battery pack. Vented gases may explode.
NOTE: The safe temperature range for the battery charg-
ing is -4°F to 113°F. Do not charge the battery outside in
freezing weather; charge it at room temperature.
•Maintain charger cord – When unplugging the char-
ger, pull the plug, not the cord, from the receptacle to
reduce the risk of damage to the electrical plug and cord.
Never carry the charger by its cord or yank it by the cord
to disconnect it from the receptacle. Keep the cord away
from heat, oil and sharp edges. Make sure the cord will
not be stepped on, tripped over or subjected to dam-
age or stress when the charger is in use. Do not use the
charger with a damaged cord or plug. Replace a dam-
aged charger immediately.
• Do not use an extension cord unless it is absolutely
necessary – Using the wrong, damaged or improperly
wired extension cord poses a risk of fire and electric
shock. If an extension cord must be used, plug the char-
ger into a properly wired 16 gauge or larger extension
cord with the female plug matching the male plug on the
charger. Make sure that the extension cord is in good
electrical condition.
• Charger is rated for 120 volt AC only – The charger
must be plugged into an appropriate receptacle.
• Use only recommended attachments – Use of an at-
tachment not recommended or sold by WEN Products
may result in risk of fire, electric shock or personal in-
jury.
• Unplug charger when not in use – Make sure to re-
move battery packs from unplugged chargers.
•Do not burn or incinerate battery packs – Battery
packs may explode, causing personal injury or dam-
age. Toxic fumes and materials are created when battery
packs are burned.
• Do not crush, drop or damage battery packs – Do not
use the battery pack or charger if they have sustained a
sharp blow, been dropped, run over or have been dam-
aged in any way (i.e. pierced with a nail, hit with a ham-
mer, stepped on, etc.).
• Do not disassemble – Incorrect reassembly may pose
a serious risk of electric shock, fire or exposure to toxic
battery chemicals. If the battery or charger are damaged,
call WEN customer service at 1-800-232-1195 for as-
sistance.
• Battery chemicals cause serious burns – Never let a
damaged battery pack contact the skin, eyes or mouth.
If a damaged battery pack leaks battery chemicals, use
rubber or neoprene gloves to safely dispose of it. If skin
is exposed to battery fluids, wash the affected area with
soap and water and rinse with vinegar. If eyes are ex-
posed to battery chemicals, immediately flush with wa-
ter for 20 minutes and seek medical attention. Remove
and dispose of contaminated clothing.
• Do not short circuit – A battery pack will short circuit if
a metal object makes a connection between the positive
and negative contacts on the battery pack. Do not place
a battery pack near anything that may cause a short cir-
cuit, such as paper clips, coins, keys, screws, nails and
other metallic objects. A short-circuited battery pack
poses a risk of fire and severe personal injury.
• Store your battery pack and charger in a cool, dry
place – Do not store the battery pack or charger where
temperatures may exceed 104 °F, such as in direct sun-
light or inside a vehicle or metal building during the
summer.
Despite all the safety precautions, caution must always be exercised when handling batteries. The following points
must be obeyed at all times to ensure safe use. Safe use can only be guaranteed if undamaged cells are used. Incor-
rect handling of the battery pack can cause cell damage.
7

BATTERY & CHARGER INSTRUCTIONS
Despite all the safety precautions, caution must always be exercised when handling batteries. The following points
must be obeyed at all times to ensure safe use. Safe use can only be guaranteed if undamaged cells are used. Incor-
rect handling of the battery pack can cause cell damage.
ABOUT THE BATTERY
1. The battery pack supplied with your cordless tool is
only partially charged. The battery pack has to be charged
completely before you use the tool for the first time.
2. For optimum battery performance, avoid low dis-
charge cycles by charging the battery pack frequently.
3. Lithium-ion batteries are subject to a natural aging
process. The battery pack must be replaced at the lat-
est when its capacity falls to just 80% of its capacity
when new. Weakened cells in an aged battery pack are
no longer capable of meeting the high power require-
ments needed for the proper operation of your tool, and
therefore pose a safety risk.
4. Do not throw battery packs into an open fire as this
poses a risk of explosion. Do not ignite the battery pack
or expose it to fire.
5. Do not exhaustively discharge batteries. Exhaustive
discharge will damage the battery cells. The most com-
mon cause of exhaustive discharge is lengthy storage or
non-use of partially discharged batteries. Stop working
as soon as the performance of the battery falls notice-
ably or the electronic protection system triggers. Place
the battery pack in storage only after it has been fully
charged.
6. Protect batteries and the tool from overloads. Over-
loads will quickly result in overheating and cell damage
inside the battery housing even if this overheating is not
apparent externally.
7. Avoid damage and shocks. Immediately replace bat-
teries that have been dropped from a height of more than
one meter or those that have been exposed to violent
shocks, even if the housing of the battery pack appears
to be undamaged. The battery cells inside the battery
may have suffered serious damage. In such instances,
please read the waste disposal information for proper
battery disposal.
WARNING! Waste electrical products should
not be disposed of with household waste. Please
recycle where facilities exist. Check with your local
authority or retailer for recycling advice.
8. If the battery pack suffers overloading and overheat-
ing, the integrated protective cutoff will switch off the
equipment for safety reasons.
9. Use only original battery packs. The use of other bat-
teries poses a fire risk and may result in injuries or an
explosion.
CHARGER
Protect the battery charger and its cord from damage.
Keep the charger and its cord away from heat, oil and
sharp edges. Electrical plugs must match the outlet.
Never modify the plug in any way. Do not use any adapter
plugs with grounded appliances. Unmodified plugs and
matching outlets will reduce the risk of electric shock.
Keep the battery charger, battery pack(s) and the cord-
less tool out of the reach of children. Do not use the
supplied battery charger to charge other cordless tools.
During periods of heavy use, the battery pack will be-
come warm. Allow the battery pack to cool to room tem-
perature before inserting it into the charger to recharge.
Do not overcharge batteries. Do not exceed maximum
charging times. These charging times only apply to dis-
charged batteries. Frequent insertion of a charged or
partially charged battery pack will result in overcharging
and cell damage. Do not leave battery in the charger for
days on end. Never use or charge a battery if you sus-
pect that it has been more than 12 months since the last
time they were charged. There is a high probability that
battery pack has already suffered dangerous damage
(exhaustive discharge). Do not use battery that has been
exposed to heat during the charging process, as the bat-
tery cells may have suffered dangerous damage. Do not
use battery that has suffered curvature or deformation
during the charging process or those that exhibit other
atypical symptoms (gassing, hissing, cracking, etc.)
8

ELECTRICAL INFORMATION
AMPERAGE REQUIRED GAUGE FOR EXTENSION CORDS
25 ft. 50 ft. 100 ft. 150 ft.
2.5A 18 gauge 16 gauge 14 gauge 12 gauge
GROUNDING INSTRUCTIONS (FOR CHARGER)
IN THE EVENT OF A MALFUNCTION OR BREAKDOWN, grounding provides the path of least resistance for an
electric current and reduces the risk of electric shock. This tool is equipped with an electric cord that has an
equipment grounding conductor and a grounding plug. The plug MUST be plugged into a matching outlet that is
properly installed and grounded in accordance with ALL local codes and ordinances.
DO NOT MODIFY THE PLUG PROVIDED. If it will not fit the outlet, have the proper outlet installed by a licensed
electrician.
IMPROPER CONNECTION of the equipment grounding conductor can result in electric shock. The conductor with
the green insulation (with or without yellow stripes) is the equipment grounding conductor. If repair or replacement
of the electric cord or plug is necessary, DO NOT connect the equipment grounding conductor to a live terminal.
CHECK with a licensed electrician or service personnel if you do not completely understand the grounding instructions
or whether the tool is properly grounded.
GUIDELINES FOR EXTENSION CORDS
Make sure your extension cord is in good condition. When using an extension cord, be sure to use one heavy
enough to carry the current your product will draw. An undersized cord will cause a drop in line voltage resulting
in loss of power and overheating. The table below shows the correct size to be used according to cord length and
nameplate ampere rating. When in doubt, use a heavier cord. The smaller the gauge number, the heavier the cord.
Make sure your extension cord is properly wired and in good condition. Always replace a damaged extension cord
or have it repaired by a qualified person before using it.
Protect your extension cords from sharp objects, excessive heat and damp/wet areas.
CAUTION! In all cases, make certain the outlet in question is properly grounded. If you are not sure, have a
licensed electrician check the outlet.
WARNING! This charger is for indoor use only. Do not expose either the tool, the battery or the charger to
rain or use in damp locations.
Use a separate electrical circuit for your tools. This circuit must not be less than a #12 wire and should be protected
with a 15 A time-delayed fuse. Before connecting the motor to the power line, make sure the switch is in the OFF
position and the electric current is rated the same as the current stamped on the motor nameplate. Running at a
lower voltage will damage the motor.
WARNING! This tool must be grounded while in use to protect the operator from electric shock.
9

3
6
7
1 Edge Guide
2 Cut-off Blade
3 Telescoping Lock
4 Adjustable Handle
5 Battery
6 Trigger
7 Safety
8 Handle Lock
9 Rotation Lock
10 Safety Guard
11 Spool Casing
4
1
5
REMOVING AND CHARGING THE BATTERY
Look, we both know that you understand how to put the battery into the charger, but please humor me and read this
anyway. Once people stop reading these manuals, I’m out of a job.
1. Press the lock button on the top center of the battery to slide it out of the string trimmer.
2. Place the battery pack into the charger by sliding it into a locked position until it clicks
3. When green light is flashing, battery is charging. If green light is no longer flashing, the battery is fully charged.
7
8
9
2
10
11
KNOW YOUR STRING TRIMMER
ASSEMBLY & ADJUSTMENTS
WARNING! Always be sure to remove the battery before adjusting, adding accessories, or checking a
function on the tool.
10