Wen 49140 User manual

For replacement parts visit
WENPRODUCTS.COM
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.
IMPORTANT:
MODEL 49140
4V MAX LITHIUM-ION
CORDLESS SCREWDRIVER
NEED HELP? CONTACT US!
Have product questions? Need technical support?
Please feel free to contact us at:
NOTICE: Please refer to wenproducts.com for the most up-to-date instruction manual.

2
TABLE OF CONTENTS
Specifications.................................................................................. 2
Introduction .................................................................................... 3
General Safety Rules ....................................................................... 4
Specific Safety Rules for the Screwdriver........................................ 6
Safety Rules for Batteries and Chargers .......................................... 8
Charging Information .................................................................... 10
Know Your Cordless Screwdriver .................................................. 11
Operation ...................................................................................... 12
Maintenance.................................................................................. 14
Troubleshooting Guide .................................................................. 15
Exploded View & Parts List ........................................................... 16
Warranty Statement....................................................................... 18
SPECIFICATIONS
Model Number 49140
Battery 4.0V (max), 3.6V (nominal), 1.5Ah
Chuck Size Ø 1/4 in.
Rated Speed 180 RPM
Rated Torque 48.7 in. lbs
Charger Output Voltage 5V (max)
Weight 0.8 lbs

For replacement parts visit
WENPRODUCTS.COM
XXX
INTRODUCTION
Thanks for purchasing the WEN Cordless Screwdriver. 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.
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 and personal injury. However, please note that
these instructions and warnings are not substitutes for proper accident prevention measures.
3

GENERAL SAFETY RULES
Safety is a combination of common sense, staying alert and knowing how your item works.
SAVE THESE SAFETY INSTRUCTIONS.
WARNING: Read and understand all warnings, cautions and operating instructions before
using this tool. Failure to follow all instructions listed below may result in personal injury and tool
damage.
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 atmospheres, such as in the presence of flammable liq-
uids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
3. Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the
risk of electric shock.
4. 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 modify the plug in any way. Do not use any adapter
plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk
of electric shock.
2. Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges and refrig-
erators. There is an increased risk of electric shock if your body is earthed or grounded.
3. Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep
cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk
of electric shock.
4. If operating a power tool 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
1. Stay alert, watch what you are doing and use common sense when operating a power tool. Do not
use a power tool while you are tired or under the influence of drugs, alcohol or medication. A mo-
ment of inattention while operating power tools may result in serious personal injury.
2. Use personal protective equipment. Always wear eye protection. Protective equipment such as a
dust mask, non-skid safety shoes and hearing protection used for appropriate conditions will reduce
the risk of personal injury.
3. Dress properly. Do not wear loose clothing or jewelry. Keep your hair and clothing away from mov-
ing parts. Loose clothes, jewelry or long hair can be caught in moving parts.
4

GENERAL SAFETY RULES
4. 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.
5. Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left at-
tached to a rotating part of the power tool may result in personal injury.
6. Do not overreach. Keep proper footing and balance at all times. This enables better control of the
power tool in unexpected situations.
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 mea-
sures reduce the risk of starting the power tool accidentally.
4. Store idle power tools out of the reach of children and do not allow persons unfamiliar with the
power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of
untrained users.
5. Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts and
any other condition that may affect the power tool’s operation. If damaged, have the power tool re-
paired before use. Many accidents are caused by poorly maintained power tools.
6. Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into
account the working conditions and the work to be performed. Use of the power tool for operations
different from those intended could result in a hazardous situation.
SERVICE
Have your power tool serviced by a qualified repair person using only identical replacement parts.
This will ensure that the safety of the power tool is maintained.
5

SPECIFIC SAFETY RULES FOR THE SCREWDRIVER
WARNING: Do not let comfort or familiarity with the product replace strict adherence to
product safety rules. Failure to follow the safety instructions may result in serious personal injury.
6
1. TOOL PURPOSE. This screwdriver is designed to fasten and remove screws from wood, plastic, and
light-gauge metal. Screwing into other materials could result in fire, injury, or damage to the work-
piece. Hex bits with a straight shank of a diameter of 1/4-inch can be used. Using the machine for any
other purpose for which it is not designed may result in serious injuries, machine damage and voiding
of the warranty.
2. PERSONAL SAFETY.
• Always wear ANSI Z87.1-approved glasses with side shields and a dust mask.
• DO NOT wear loose clothing or jewelry, as they might get drawn in by the tool. Tie back long hair.
• DO NOT wear gloves while operating this tool.
3. TOOL & ACCESSORIES INSPECTION. Before operation, check the tool and accessories for any dam-
age or missing parts. Do not use the tool if any part is missing or damaged. Make sure all adjustments
are correct and all connections are tight. Keep all guards in place.
4. Screwdriver ACCESSORIES.
• Do not use bits or any accessories that are damaged or worn.
• Make sure the bit is securely locked in the chuck.
• Always turn off the unit before doing any cleaning or maintenance.
• Do not use the charging cable if it is damaged.
5. WORKPIECE REQUIREMENTS. Check the workpiece carefully for splits, knots, nails, or other ob-
structions. These types of blemishes may cause a safety risk during operation.
6. Hold the screwdriver only by the insulated gripping surfaces during operation. Fasteners that con-
tact hidden wiring may make the exposed metal parts of the power tool “live” and could electrically
shock the operator.
7. Store the screwdriver and charger indoors in dry condition. Do not expose the screwdriver or the
charging cable to temperatures over 104°F (40°C).
8. Be sure you always have a firm footing and hold the tool firmly. Keep hands, hair and other beloved
body parts away from the rotating components of the tool.
9. Always secure the workpiece, especially if the workpiece is small.
10. Use the appropriate bits suitable for the material and the operating speed.
11. Do not touch the bit or the workpiece immediately after operation. They may be hot and could burn
your skin.

SPECIFIC SAFETY RULES FOR THE SCREWDRIVER
7
12. Always remove the machine from the charger immediately after re-charging is completed.
13. Do not try to open or disassemble your screwdriver. Do not open and replace the battery cells.
14. CLEANING. Never use solvents to clean plastic parts. Solvents could dissolve or otherwise dam-
age the material. Use only a soft damp cloth to clean plastic parts.
15. REPLACEMENTS. Should any component of your screwdriver be missing/damaged or fail in any
way, shut off the switch and remove the plug from power supply outlet. Replace the missing, dam-
aged, or failed parts using only identical replacement parts before resuming operation.
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 California 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 exposure to these chemicals, work in a well-ventilated area with approved safety equipment
such as dust masks specially designed to filter out microscopic particles.
These safety instructions can’t possibly warn of every scenario that may arise with this tool,
always make sure to stay alert and use common sense during operation.

SAFETY RULES FOR BATTERIES AND CHARGERS
8
CHARGING THE BATTERY
1. Before charging and using the battery, read all cautionary markings on the battery charger, battery
cable, and the product using the battery.
2. Only recharge the battery with the charger specified by the manufacturer. Do not use the supplied
battery charger to charge other cordless tools as undesirable risks such as fire or death may occur
when used with another battery.
3. Inspect the power tool and charger before charging. Do not operate the charger with a damaged cord
or plug.
4. Electrical plugs must match the outlet. Never modify the plug in any way. Do not use any adapter
plugs with grounded appliances. Do not attempt to use a step-up transformer, an engine generator or
a DC power receptacle.
5. This charger is for indoor use only. Do not expose to rain or use in damp locations.
6. Do not place the tool or the charger near fire or heat. Place the charger on a flat non-flammable
surface and away from open flame and flammable materials before charging.
7. Do not charge the tool inside a box or container of any kind. The tool must be placed in a well-
ventilated area during charging. Do not allow anything to cover or clog the charging vents.
8. Do not operate the charger or the tool if it has received a sharp blow, either from being dropped or
damaged. Take it to a qualified service technician before attempting to use.
9. Never use or charge a battery if you suspect that it has been more than 12 months since the last
time it was charged. There is a high probability that the battery has already suffered dangerous dam-
age (exhaustive discharge).
10. The battery will become warm during extended periods of use. Allow the battery pack to cool to
room temperature before charging it again. This will protect the life of your battery.
11. Always charge the battery pack between temperatures 32 to 86 °F (0 to 30 °C). Ideal charging tem-
perature is 64 to 75 °F (18 to 24 °C).
12. Disconnect the charger from the power source and the tool when not in use. This will reduce the
risk of damage to the charger during a power surge or if metal pieces should fall into the opening.

SAFETY RULES FOR BATTERIES AND CHARGERS
9
USING THE BATTERY
1. Only use the tool with the battery specified by the manufacturer. Use of any other battery packs may
result in a risk of injury and fire.
2. Under abusive conditions, liquid may be ejected from the battery. Avoid contact with this liquid like
you would a fire or an ex-lover. If contact accidentally occurs, flush the contact area with water. If the
liquid contacts your eyes, flush with water for 10 minutes and then seek medical help. Liquid ejected
from the battery may cause irritation or burns.
3. If operating time has become excessively shorter, stop operating immediately. It may result in over-
heating, burning, or even an explosion.
MAINTAINING THE BATTERY AND CHARGING CABLE
1. To reduce the risk of electric shock, always unplug the charger from the outlet before attempting
any maintenance or cleaning.
2. Protect the battery charging cable from damage. Keep the charging cable away from heat, oil and
sharp edges. Keep the tool out of the reach of children.
3. Do not remove the battery pack from the tool.
4. Store the tool and battery pack in a location where temperatures will not exceed 104 °F (40 °C). This
will help prevent serious damage to the battery cells.
5. Do not disassemble the charging cable or the tool. Take these to a qualified service technician when
service or repairs are required. Incorrect assembly may result in electric shock or fire.
6. Do not dispose of the battery or the tool in fire or with household waste. Take it to your local recy-
cling facility.

CHARGING INFORMATION
10
CHARGING YOUR SCREWDRIVER
1. Inspect the screwdriver, battery charger and power cord for
any signs of damage.
2. Plug the micro USB end of the charging cable into the
charging port (Fig. 1) on the screwdriver.
3. Connect the USB end of the charging cable into any USB
port with a maximum output of 5V.
WARNING: The battery must be charged fully before the first time use.
WARNING: Always allow the power tool to cool down
to room temperature before charging. This will extend the
life of your battery.
NOTE:A battery that has not been used for an extended period of time will have reduced battery
capacity. A substantial drop in operating period per charge indicates that the battery is worn out.
WARNING: The charging cable and battery are specifically designed to be compatible. Do
not attempt to use any other cords to charge the screwdriver or use the cable for any use besides
charging the screwdriver. Never insert or allow metallic objects into the charging cable or charg-
ing port as an electrical failure or other hazards may occur.
Fig. 1
4. The power indication light (Fig. 1 - 2) indicates the power level during charging. If the light is red,
the battery is being charged. If the light is green, the battery is fully charged.
5. Upon full charge, disconnect the charger from the outlet, then disconnect the charger from the
tool.
1