WEN 20401 20V Cordless Mouse Sander Instruction Manual

June 5, 2024
WEN

WEN logo 20401 20V Cordless Mouse Sander
Instruction Manual

WEN 20401 20V Cordless Mouse Sander

NEED HELP? CONTACT US!

Have product questions? Need technical support? Please feel free to contact us:

1-800-232-1195 (M-F 8AM-5PM CST)
TECHSUPPORT@WENPRODUCTS.COM

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 with 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.

For replacement parts and the most up-to-date instruction manuals, visit WENPRODUCTS.COM

To purchase accessories and replacement parts for your tool, visit WENPRODUCTS.COM

20V 2.0Ah Max Battery (Model 20202)
20V 4.0Ah Max Battery (Model 20204)
20V Charger (Model 20200C)
Replacement Sandpaper (Models 20401SP80, 20401SP120, & 20401SP240)

INTRODUCTION

Thanks for purchasing the WEN Mouse Sander. 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.

Indicates danger, warning, or caution. The safety symbols and the explanations with them deserve your careful attention and understanding. Always follow 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: 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.

SPECIFICATIONS

Model Number 20401
No-Load Speed 12,000 RPM
Sanding Pad Size 5-1/2 in. x 1-1/2 in. x 3-3/5 in.
Product Dimensions (Without Battery or Bag) 8 in. x 3-5/8 in. x 6 in.
Product Weight (Without Battery or Bag) 1 lb 11.5 oz
Battery Models All WEN 20V MAX Batteries*
--- ---
Charger Models All WEN 20V MAX Chargers

*NOTE: Some tools may not be compatible with WEN 20V MAX 1.5Ah Batteries, model 49120B. Contact WEN customer service at 1-800-232-1195, M-F with questions.

WEN plans to continue to add more items to our 20V line. For an up-to-date list of the 20V cordless tools compatible with the included battery and charger, visit wenproducts.com and search model number 20202 (2Ah) or 20204 (4Ah). In the battery’s description, there will be a list of current products that this the battery can be used with.

GENERAL SAFETY RULES

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.

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.

WORK AREA SAFETY

  1. Keep the 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 liquids, gases, or dust. Power tools create sparks that 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 the 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 elec­tric 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
  5. When operating a power tool outdoors, use an ex­ tension cord suitable for outdoor use. The use  of a cord suitable for outdoor use reduces the risk of electric
  6. If operating a power tool in a damp location is un­ avoidable, use a ground fault circuit interrupter (GFCI) protected supply. The use  of a GFCI reduces the risk of elec­tric 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 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 respira­tory 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 a 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
  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
  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 Keep your hair and clothing away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts.
  7. If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. The 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

  2. Do not use the power tool if the switch does not turn 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

  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 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 main­tained 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 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.

  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.

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 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.

MOUSE SANDER SAFETY WARNINGS

WARNING! Do not operate the power tool until you have read and understood the following instructions and the warning labels.

MOUSE SANDER SAFETY

  1. Hold your power tool by the insulated gripping surfaces, especially when performing an operation where the accessory could contact hidden wiring.
  2. Protect your lungs. Wear a face or dust mask during operation. Following this rule will reduce the risk of serious respiratory injury.
  3. Protect your hearing. Wear hearing protection during extended periods of operation. Following this rule will reduce the risk of serious personal injury.
  4. Check damaged parts. Before further use of the tool, determine that it will operate properly and perform its intended function. Check for alignment, binding or breakage of moving parts or any other conditions that may affect its operation. A guard or other part that is damaged should be properly repaired or replaced by an authorized service center. Following this rule will reduce the risk of shock, fire, or serious injury.
  5. Remove all nails from lumber before using this tool. Following this rule will reduce the risk of injury.
  6. Save these instructions. Refer to them frequently and use them to instruct others who may use this product. If you loan someone this product, loan them these instructions also.
  7. Do not use the sander to remove lead-based paints.

Some examples of these chemicals are:

  • Lead from lead-based paints
  • Crystalline silica from bricks and cement and other masonry products
  • Arsenic and chromium from chemically treated lumber.

To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

WARNING! This product and the 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.

VIBRATION SAFETY
This tool vibrates during use. Repeated or long-term exposure to vibration may cause temporary or permanent physical injury, particularly to the hands, arms and shoulders.

To reduce the risk of any vibration-related injury:

  1. First be examined by a doctor and then have regular medical check-ups to ensure medical problems are not being caused or worsened from use. Pregnant women or people who have impaired blood circulation to the hand, past hand injuries, nervous system disorders, diabetes, or Raynaud’s Disease should not use this tool. If you feel any symptoms related to vibration (such as tingling, numbness, and white or blue fingers), seek medical advice as soon as possible.
  2. Do not smoke during use. Nicotine reduces the blood supply to the hands and fingers, increasing the risk of vibration-related injury.
  3. Wear gloves to reduce vibration effects on the user.
  4. Use tools with the lowest vibration when able to.
  5. Take vibration-free breaks during each day of work.
  6. Grip the tool as lightly as possible (while still keeping safe control of it). Let the tool do the work.
  7. To reduce vibration, maintain the tool as explained in this manual. If any abnormal vibration occurs, stop use immediately.

ELECTRICAL INFORMATION (CHARGER)

DOUBLE-INSULATED CHARGER
The charger’s electrical system is double-insulated where two systems of insulation are provided. This eliminates the need for the usual three-wire grounded power cord.  Double-insulated tools do not need to be grounded, nor should a means for grounding be added to the product. All exposed metal parts are isolated from the internal metal components with protecting insulation.

IMPORTANT: Servicing a double-insulated product requires extreme care and knowledge of the system, and should be done only by qualified service personnel using identical replacement parts. Always use original factory replacement parts when servicing.

  1. Polarized Plugs. To reduce the risk of electric shock, this equipment has a polarized plug (one blade is wider than the other). This plug will fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse the plug. If it still does not fit, contact a qualified electrician to install a proper outlet. Do not modify the machine plug
    or the extension cord in any way.

  2. Ground fault circuit interrupter protection (GFCI) should be provided on the circuit or outlet used for this power tool to reduce the risk of electric shock.

  3. Service and repair. To avoid danger, electrical appliances must only be repaired by a qualified service technician using original replacement parts.

GUIDELINES AND RECOMMENDATIONS FOR EXTENSION CORDS
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 ampere rating. When in doubt, use a heavier cord. The smaller the gauge number, the heavier the cord.

AMPERAGE REQUIRED GAUGE FOR EXTENSION CORDS
25 ft. 50 ft.
2A 18 gauge

1. Examine the extension cord before use. 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.
2. Do not abuse the extension cord. Do not pull on the cord to disconnect from the receptacle; always disconnect by pulling on the plug. Disconnect the extension cord from the receptacle before disconnecting the product from the extension cord. Protect your extension cords from sharp objects, excessive heat, and damp/wet areas.
3. Use a separate electrical circuit for your tool. This circuit must not be less than a 12-gauge wire and should be protected with a 15A 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.

BATTERY & CHARGER SAFETY WARNINGS

Despite all of the safety precautions, caution must always be taken 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. Incorrect handling of the battery pack can cause cell damage.

  • 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 flammable 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 ventilation.
    Do not allow smoking or open flames near a charging battery pack.
    Vented gases may explode.
    NOTE: The safe temperature range for the battery charging 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 charger, 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 damage or stress when the charger is in use.
    Do not use the charger with a damaged cord or plug. Replace a damaged 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 charger 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.

  • The charger is rated for 120 volt AC only – The charger must be plugged into an appropriate receptacle.

  • Use only recommended attachments – Use of an attachment not recommended or sold by WEN Products may result in a risk of fire, electric shock, or personal injury.

  • Unplug the charger when not in use – Make sure to remove battery packs from unplugged chargers.
    WARNING! To reduce the risk of electric shock, always unplug the charger before performing any cleaning or maintenance. Do not allow water to flow into the charger. Use a  Ground Fault Circuit Interrupter (GFCI) to reduce shock hazards.

  • Do not burn or incinerate battery packs – Battery packs may explode, causing personal injury or damage.
    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 damaged in any way (i.e. pierced with a nail, hit with a hammer, 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 is damaged, call  WEN customer service at 1-800-232-1195 for assistance.

  • 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 the skin is exposed to battery fluids, wash the affected area with soap and water and rinse with vinegar. If eyes are exposed to battery chemicals, immediately flush with water for 20 minutes and seek medical attention. Remove and dispose of contaminated clothing.

  • 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 sunlight or inside a vehicle or metal building during the summer.

  • 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 circuit, 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.

ABOUT THE BATTERY

  1. The battery pack has to be charged completely before you use the tool for the first time.
  2. For optimum battery performance, avoid low discharge 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 latest 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 requirements 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. The exhaustive discharge will damage the battery cells. The most common 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 noticeably 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. Overloads 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 batteries 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.
  8. If the battery pack suffers overloading and overheating, the integrated protective cutoff will switch off the equipment for safety reasons.
  9. Use only original battery packs. The use of other batteries poses a fire risk and may result in injuries or an explosion.

ABOUT THE CHARGER
Protect battery charger and 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 cordless 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 become warm. Allow the battery pack to cool to room temperature before inserting it into the charger to recharge.
Do not overcharge batteries. Do not exceed the maximum charging times. These charging times only apply to discharged batteries. Frequent insertion of a charged or partially charged battery pack will result in overcharging and cell damage. Do not leave the battery in the charger for days on end.
Never use or charge a battery if you suspect that it has been more than 12 months since the last time they were charged.
There is a high probability that the battery pack has already suffered dangerous damage (exhaustive discharge).
Do not use batteries that have been exposed to heat during the charging process, as the battery cells may have suffered dangerous damage.
Do not use a battery that has suffered curvature or deformation during the charging process or those that exhibit other atypical symptoms (gassing, hissing, cracking, etc.)

UNPACKING & PACKING LIST

UNPACKING
Carefully remove the mouse sander from the packaging and place it on a sturdy, flat surface. Make sure to take out all contents and accessories. Do not discard the packaging until everything is removed. Check the packing list below to make sure you have all of the parts and accessories. If any part is missing or broken, please contact customer service at 1-800-232-1195 (M-F 8-5 CST) or email techsupport@wenproducts.com.

Components

WEN 20401 20V Cordless Mouse Sander - Components

Accessories

WEN 20401 20V Cordless Mouse Sander - Accessories

KNOW YOUR MOUSE SANDER

TOOL PURPOSE
Easily sand corners and very tight spaces with your WEN Mouse Sander. Refer to the following diagrams to become familiarized with all the parts and controls of your mouse sander. The components will be referred to later in the manual for assembly and operation instructions.

WEN 20401 20V Cordless Mouse Sander - TOOL PURPOSE

OPERATION

CHARGING THE BATTERY PACK
The 20V battery pack for this tool is supplied in a low charge condition to prevent possible problems, and must be charged completely before you use the tool for the first time.

  1. Connect the charger to a 120V, 60Hz AC outlet. The green light on the charger will illuminate, indicating that the charger is powered.

  2. Slide the battery all the way into the charger until it clicks. The red light on the charger will illuminate, indicating that the battery is charging.
    Charging Indication:
    • Solid Green: Ready to Charge
    • Solid Red: Charging
    • Solid Green: Charged

  3. When the battery is charged, the red light will turn off and the green light will turn on. Remove the battery from the charger and unplug the charger from the power supply.

NOTE: Battery will not reach full charge the first time it is charged. Allow several cycles for the battery to fully charge. The battery pack may become warm while charging; this is normal. If the battery is hot after continuous use in the tool, allow it to cool to room temperature before charging. This will prolong the life of your battery.

CHARGING THE BATTERY PACK (CONT.)
The battery pack is equipped with three LED battery life indicator lights. Press and hold the power button on the rear of the battery to check the battery’s charge status.

Battery Life Indication:

  • Three Lights: The battery is fully charged.
  • Two Lights: The battery is about 60% charged.
  • One Light: The battery is almost out of power and needs to be charged.

INSERTING AND REMOVING THE BATTERY
Look, we both know that you understand how to install and remove this battery. It’s not rocket science. I’m going to tell you anyway though since once these manuals stop needing to be written, I’m out of a job.

WARNING! Before making any adjustments make sure the impact wrench is switched off with the direction of rotation switch in the center position.

  1. To install the battery, slide the battery pack into the battery port on the back of the sander. Make sure the release latch on the rear side of the battery pack snaps into place and the battery is secure before beginning operation.
  2. To remove the battery pack, press the battery release latch on the front of the battery and pull the battery pack out.

ATTACHING THE DUST BAG

  1. Slide the dust bag onto the port right under the battery pack (Fig. 1). It will only attach one way, so if it does not slide on easily, flip it over.

INSTALLING & REMOVING SANDING SHEETS

  1. Before installing sandpaper, make sure the hook and loop base of the sander is free of dust and dirt and that the battery pack is removed from the sander with the ON/OFF  switch in the OFF position.
  2. The hook and loop base of the sander will hold any hook and loop sandpaper without clamps or glue. Simply line up the sandpaper with the sander base and press together,  making sure the front edge of the sandpaper is aligned with the front edge of the hook and loop fastener base.
  3. To remove used sandpaper, peel one edge away from the base of the sander until the whole sheet is free.

CAUTION! Do not use torn or severely worn or damaged sandpaper. To do so could damage the surface of the hook and loop base of the sander.

Replacement sandpaper is available for purchase at wenproducts.com.

WORKPIECE AND WORK AREA SET UP

  1. Designate a work area that is clean and well-lit. The work area must not allow access by children or pets to prevent distraction and injury. We know your cat is super cute, but pay attention to your project.
  2. Secure loose workpieces using vises or clamps (not included) to prevent movement while working.
  3. Move all objects that could pose as a possible hazard away from the work area.

GENERAL OPERATING INSTRUCTIONS

  1. Make sure that the power switch is in the OFF position.

  2. Turn the switch to the ON position.

  3. Do not use excessive pressure while sanding. Always sand in the same direction as the grain of the wood. Let the sandpaper do the work. Apply even pressure over the entire workpiece.

  4. Check the wear on the sandpaper at regular intervals and replace it as necessary.
    NOTE: Always turn the switch OFF and remove the battery from the sander before changing sheets of sandpaper.

  5. When sanding is completed, remove the sander from the workpiece and turn the power switch to the OFF position.

  6. When completely finished using the sander, empty the dust bag, then use a vacuum to remove any dust from the dust bag port.

  7. To prevent accidents, turn off the sander after use, clean it, remove the battery, and then store the sander indoors out of children’s reach.

SANDPAPER SELECTION
Choosing the right grit and material of sandpaper maximizes the quality of your sanded finish. Aluminum oxide, silicon carbide, and other synthetic abrasives are best for power sanding as natural abrasives, such as flint and garnet, are too soft for economical use in power sanding.

In general, coarse grit (lower numbers) will remove the most material and finer grit (higher numbers) will produce the best finish in all sanding operations. The condition of the surface to be sanded will determine the right grit for the job. If the surface is rough, start with coarse grit and sand until the surface is uniform. Medium grit may then be used to remove the scratches left by the coarser grit while a finer grit can be used for finishing. Always continue sanding with each grit until the surface is uniform.
NOTE: DO NOT use the sander without sandpaper. Doing so will damage the hook and loop fastener sanding base.

MAINTENANCE

WARNING! To avoid accidents, turn OFF and remove the battery pack from the charger and the charger from the outlet before cleaning, adjusting, or performing any maintenance work.

WARNING! Any attempt to repair or replace electrical parts on this tool may be hazardous. Servicing of the tool must be performed by a qualified technician. When servicing,  use only identical WEN replacement parts.
The use of other parts may be hazardous or induce product failure.

ROUTINE INSPECTION
Before each use, inspect the general condition of the tool. If any of these following conditions exist, do not use them until the parts are replaced.

Check for:

  • Loose hardware,
  • Damaged battery pack,
  • Cracked or broken parts, and
  • Any other condition that may affect its safe operation

CLEANING & STORAGE

  1. Keep the ventilation openings free from dust and debris to prevent the motor from overheating.

  2. Wipe the tool surfaces clean with a damp cloth and mild soap. Make sure water does not get into the tool.
    CAUTION: Most plastics are susceptible to damage from various types of commercial solvents. Do not use any solvents or cleaning products that could damage the plastic parts. Some of these include but are not limited to: gasoline, carbon tetrachloride, chlorinated cleaning solvents, and household detergents that contain ammonia.

  3. Allow the tool to cool before storing it. Store the tool in a clean and dry place away from the reach of children.

PRODUCT DISPOSAL
Used power tools should not be disposed of together with household waste. This product contains electronic components that should be recycled. Please take this product to your local recycling facility for responsible disposal and to minimize its environmental impact.

TROUBLESHOOTING GUIDE

WARNING! Stop using the tool immediately if any of the following problems occur. Repairs and replacements should only be performed by an authorized technician. For any questions, please contact our customer service at 1-800-232-1195, M-F 8-5 CST or email us at techsupport@wenproducts.com.

Problem Common Causes Solution
Deep sanding grooves or scars in the workpiece. 1. Sandpaper grit is too
coarse. 1. Use finer-grit sandpaper.
2. Workpiece sanded across the grain. 2. Sand with the grain of the wood.
3. Too much sanding force on the workpiece. 3. Reduce pressure on the

workpiece while sanding.
4. Sander help against workpiece surface for too long.| 4. Keep the sander moving steadily while sanding.
Sanding surface clogs quickly| 1. Too much pressure against the workpiece.| 1. Clean sandpaper and reduce pressure on the workpiece while sanding.
2. Sanding softwood.| 2. Use different sandpaper or clean/ remove sandpaper frequently.
Burns on workpiece| 1. Sandpaper grit is too fine| 1. Use a coarser grit sandpaper
2. Too much pressure being applied to the workpiece| 2. Reduce sanding pressure on the workpiece
3. Sander help against workpiece surface for too long| 3. Keep the sander moving steadily while sanding
4. Sandpaper is loaded with debris.| 4. Clean or replace the sandpaper
Sander does not turn on| 1. Battery is not installed.| 1. Install the battery. Don’t beat yourself up, we’ve all done it.
2. Battery is depleted.| 2. Charge the battery.
3. Defective power switch.| 3. Call customer service at 1-800-232- 1195 for assistance
4. Motor or wiring problem| 4. Call customer service at 1-800-232- 1195 for assistance
Motor overheats| 1. Motor overloaded| 1. Reduce sanding pressure on the workpiece and take more frequent breaks.
2. Extension cord too long with an insufficient gauge.| 2. Refer to section “Guidelines and Recommendations for Extension Cords.”

EXPLODED VIEW & PARTS LIST

WEN 20401 20V Cordless Mouse Sander - PARTS LIST

NOTE: Not all parts may be available for purchase. Parts and accessories that wear down over the course of normal use are not covered under the warranty.

EXPLODED VIEW & PARTS LIST

No. Part No. Description Qty.
1 Battery Terminal 1
2 Switch 1
3 Switch Cover 1
4 Motor 1
5 Motor Plate 1
6 Spring Washer, 4mm 2
7 Spindle 1
8 Screw, M4x6 2
9 Bearing, 6900 1
10 Fan 1
11 Flywheel 1
12 Dust Port, Upper 1
13 Dust Port, Lower 1
14 20401014ASM Dust Bag 1
15 1
16 Self-tapping Screw,
ST3x10 4
17 O-ring 1
18 Front Bracket 1
19 Bearing, 608-2RS 1
20 Rear Bracket 1
21 Baseplate 1
22 Self-tapping Screw, ST4x10 3
23 Sandpaper 1
24 Self-tapping Screw, ST3x13 6
25 Right Housing 1
26 Left Housing 1
27 20202 Battery 1
28 20200C Charger 1
29 Bushing 1

NOTE: Not all parts may be available for purchase. Parts and accessories that wear down over the course of normal use are not covered under the warranty.

WARRANTY STATEMENT

WEN Products is committed to building tools that are dependable for years. Our warranties are consistent with this commitment and our dedication to quality.

LIMITED WARRANTY OF WEN PRODUCTS FOR HOME USE

GREAT LAKES TECHNOLOGIES, LLC (“Seller”) warrants to the original purchaser only, that all WEN consumer power tools will be free from defects in material or workmanship during personal use for a period of two (2) years from the date of purchase or 500 hours of use; whichever comes first. Ninety days for all WEN products if the tool is used for professional or commercial use. The purchaser has 30 days from the date of purchase to report missing or damaged parts.

SELLER’S SOLE OBLIGATION AND YOUR EXCLUSIVE REMEDY under this Limited Warranty and, to the extent permitted by law, any warranty or condition implied by law, shall be the replacement of parts, without charge, which are defective in material or workmanship and which have not been subjected to misuse, alteration, careless handling, misrepair, abuse, neglect, normal wear and tear, improper maintenance, or other conditions adversely affecting the Product or the component of the Product, whether by accident or intentionally, by persons other than Seller. To make a claim under this Limited Warranty, you must make sure to keep a copy of your proof of purchase that clearly defines the Date of Purchase (month and year) and the Place of Purchase. Place of Purchase must be a direct ven-dor of Great Lakes Technologies, LLC. Purchasing through third-party vendors, including but not limited to garage sales, pawnshops, resale shops, or any other secondhand merchant, voids the warranty included with this product. Contact techsupport@wenproducts.com or 1-800-232-1195 with the following information to make arrangements: your shipping address, phone number, serial number, required part numbers, and proof of purchase. Damaged or defective parts and products may need to be sent to WEN before the replacements can be shipped out.

Upon the confirmation of a WEN representative, your product may qualify for repairs and service work. When re-turning a product for warranty service, the shipping charges must be prepaid by the purchaser. The product must be shipped in its original container (or an equivalent), properly packed to withstand the hazards of shipment. The product must be fully insured with a copy of the proof of purchase enclosed. There must also be a description of the problem in order to help our repairs department diagnose and fix the issue. Repairs will be made and the product will be returned and shipped back to the purchaser at no charge for addresses within the contiguous United States.

THIS LIMITED WARRANTY DOES NOT APPLY TO ITEMS THAT WEAR OUT FROM REGULAR USAGE OVER TIME, INCLUDING BELTS, BRUSHES,  BLADES, BATTERIES, ETC. ANY IMPLIED WARRANTIES SHALL BE LIMITED IN DURATION TO TWO (2) YEARS FROM THE DATE OF PURCHASE. SOME  STATES IN THE U.S. AND SOME CANADIAN PROVINCES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE  ABOVE LIMITATION MAY NOT APPLY TO YOU.

IN NO EVENT SHALL THE SELLER BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING BUT NOT LIMITED TO LIABILITY  FOR LOSS OF PROFITS) ARISING FROM THE SALE OR USE OF THIS PRODUCT. SOME STATES IN THE U.S. AND SOME CANADIAN  PROVINCES DO  NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION  MAY NOT APPLY TO YOU.

THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE  IN THE U.S., PROVINCE TO PROVINCE IN CANADA, AND FROM COUNTRY TO COUNTRY.

THIS LIMITED WARRANTY APPLIES ONLY TO ITEMS SOLD WITHIN THE UNITED STATES OF AMERICA, CANADA, AND THE COMMONWEALTH OF  PUERTO RICO. FOR WARRANTY COVERAGE WITHIN OTHER COUNTRIES, CONTACT THE WEN CUSTOMER SUPPORT LINE. FOR WARRANTY PARTS  OR PRODUCTS REPAIRED UNDER WARRANTY SHIPPING TO ADDRESSES OUTSIDE OF THE CONTIGUOUS UNITED STATES, ADDITIONAL  SHIPPING CHARGES MAY APPLY.

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THANKS FOR REMEMBERING

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References

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