WEN 40V Max Lithium Ion Cordless Chainsaw
Model 40417
For replacement parts, visit 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 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 at:
- Phone: 800-232-1195 (M-F 8am-5pm CST)
- Email: techsupport@wenproducts.com
- Website: WENPRODUCTS.COM
NOTICE: Please refer to wenproducts.com for the most up-to-date instruction manual.
Specifications
| Model Number | 40417 |
|---|---|
| Motor | 40V Brushless Motor |
| Max Motor Speed | 8200 RPM (No Load) |
| Max Chain Speed | 49 feet per second |
| Saw Chain | 16 inches, Oregon |
| Saw Chain Model | 91PJ056X |
| Guide Bar Model | 160SDEA041 |
| Battery | 40V Max Lithium Ion, 4Ah |
| Charger Input | 100-120V AC, 60Hz, 100W |
| Charger Output | 42V DC, 2A |
| Weight (w/ Battery) | 12 lbs |
| Product Dimensions | 32 x 8.5 x 10 inches |
| Battery Model | 40404 |
| Charger Model | 40400C |
WEN plans to continue to add more items to its 40V line. For an up-to-date list of the 40V cordless tools compatible 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.
Introduction
Thanks for purchasing the WEN 40V Max Lithium Ion Cordless Chainsaw. 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.
⚠️ 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.
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.
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
- Keep work area clean and well lit. Cluttered or dark areas invite accidents.
- Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
- Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
- Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
ELECTRICAL SAFETY
- 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.
- Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
- Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
- 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.
- When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
- If operating a 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
- 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 moment of inattention while operating power tools may result in serious personal injury.
- Use personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid safety shoes and hearing protection used for appropriate conditions will reduce the risk of personal injury.
- Dress properly. Do not wear loose clothing or jewelry. Keep your hair and clothing away from moving parts. Loose clothes, jewelry or long hair can be caught in moving parts.
GENERAL SAFETY RULES (Continued)
- 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.
- 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.
- Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
- 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
- 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.
- 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.
- 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.
- 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.
- 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 repaired before use. Many accidents are caused by poorly maintained power tools.
- 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.
BATTERY USE AND CARE
- Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery pack may create a risk of fire when used with another battery pack.
- Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury and fire.
- When battery pack is not in use, keep it away from other metal objects, like paper clips, coins, keys, nails, screws or other small metal objects, that can make a connection from one terminal to another. Shorting the battery terminals together may cause burns or a fire.
- Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.
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.
Specific Safety Rules for Chainsaws
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.
- TOOL PURPOSE: This chainsaw is designed for sawing wood. Sawing other types of materials may result in serious injuries, machine damage and voiding of the warranty. Only use with WEN 40V Max Lithium Ion battery 40404.
- Keep all parts of the body away from the saw chain when the chainsaw is operating. Before you start the chainsaw, make sure the saw chain is not contacting anything. A moment of inattention while operating the chain saw may cause entanglement of your clothing or body with the saw chain.
- Always hold the chainsaw with your right hand on the rear handle and your left hand on the front handle. Holding the chainsaw in the opposite manner can result in an increased risk of serious injury to the user and should never be done. NOTE: For chain saws designed with the guide bar on the left side, the reference to “right hand” and “left hand” positioning is reversed.
- Only hold the power tool by the insulated gripping surfaces to avoid electric shock in case the saw chain contacts hidden wiring. Saw chains contacting a live wire may make exposed metal parts of the power tool live and can give the operator an electric shock.
- Wear safety glasses and hearing protection. Protective equipment for hands, legs, head and feet is also highly recommended. Protective clothing greatly reduces the risk of personal injury from loose debris or accidental contact with the saw chain.
- Do not operate the chainsaw while standing in a tree. Only operate the chainsaw from a firm, level surface fixed on the ground.
- Always keep proper footing during operation. Slippery or unstable surfaces such as ladders may cause a loss of balance or control.
- When cutting a limb that is under tension, be alert for spring back. When tension from wood fibers and branches is suddenly released, the limb may fly in unpredictable ways, possibly resulting in kickback and injury to the user.
- Use extreme caution when cutting brush and saplings. The slender material may catch the saw chain, whipping towards you or pulling you off balance.
- Carry the chainsaw by the front handle with the chainsaw switched off and away from your body. When transporting or storing the chainsaw always protect the blade with a scabbard (blade cover). Remove battery for transport.
- Routinely lubricate, adjust chain tension, and check blades for dullness. Follow these instructions closely to minimize kickback and maximize the lifespan of the tool.
- Keep handles dry, clean and free of oil and grease. Slippery handles increase the chances of losing control.
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.
- Only use this chainsaw to cut wood. Do not cut plastic, masonry or other non-wood materials. Do not use this chainsaw for anything other than its intended purpose. Let the saw work at its own pace.
REDUCING KICKBACK
Kickback can occur when the tip of the guide bar touches an object or when the wood closes in and pinches the saw chain inside of the cut. Tip contact can kick the guide bar up and back towards the operator. Pinching the saw chain along the top of the guide bar can push the bar rapidly towards the operator. Either of these reactions may cause a loss in control of the chainsaw, increasing the chances of serious personal injury. Do not rely on the safety devices built into the saw. Chainsaw users should take as many precautions as possible to minimize on-site accidents. Kickback is the result of tool misuse and/or incorrect operating procedures. These conditions can be minimized with the following steps:
- Maintain a firm grip, with thumbs and fingers encircling the chainsaw handles. Both hands should be on the saw with your body and arms in a position to resist kickback forces. Kickback forces can be controlled by the operator, if proper precautions are taken. Do not let go of the chainsaw.
- Do not overreach and do not cut above shoulder height. This helps prevent unintended tip contact and enables better control of the chainsaw in unexpected situations.
- Only use replacement bars and chains specified by WEN. Incorrect replacement bars and chains may cause chain breakage and/or kickback.
- Follow the manufacturer's sharpening and maintenance instructions for the chainsaw. Decreasing the depth gauge height can lead to increased kickback.
Specific Safety Rules for the Battery & Charger
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.
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. Incorrect handling of the battery pack can cause cell damage.
- TOOL PURPOSE: This charger is designed for recharging WEN 40V Max Lithium Ion batteries (model numbers 40401 and 40404). Charging any other battery or using a different charger to charge these batteries could result in fire, injury, or damage. Using the charger for any other purpose for which it is not designed may result in serious injuries, machine damage and voiding of the warranty.
- 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 charging the battery is 50°F to 104°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 16AWG 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 120V, 60Hz 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 risk of fire, electric shock or personal injury.
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.
- UNPLUG CHARGER WHEN NOT IN USE: Make sure to remove battery packs from unplugged chargers.
- 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 (e.g. 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 are 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 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.
- 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.
- 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.
About the Battery
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.
WARNING: To reduce risk of injury, charge only WEN batteries with this charger. Other types of batteries may burst causing personal injury and damage.
ABOUT THE BATTERY
- 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.
- For optimum battery performance, avoid low discharge cycles by charging the battery pack frequently.
- 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.
- 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.
- Do not exhaustively discharge batteries. 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.
- 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.
- 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.
- If the battery pack suffers overloading and overheating, the integrated protective cutoff will switch off the equipment for safety reasons.
- Use only original battery packs. The use of other batteries poses a fire risk and may result in injuries or an explosion.
- You must fully charge the battery every 3 months. See the tables on pages 13 & 14 to understand what the LED lights on your battery and charger indicate.
About the Charger
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.
WARNING: To reduce risk of injury, charge only WEN batteries with this charger. Other types of batteries may burst causing personal injury and damage.
ABOUT THE 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 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 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 battery that have been exposed to heat during the charging process, as the battery cells may have suffered dangerous damage. Do not use battery that have suffered curvature or deformation during the charging process or those that exhibit other atypical symptoms (gassing, hissing, cracking, etc.)
Electrical Information
- 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.
- GROUND FAULT CIRCUIT INTERRUPTER PROTECTION (GFCI): GFCI protection should be provided on the circuit or outlet used for this power tool to reduce the risk of electric shock.
- SERVICE AND REPAIR: To avoid danger, electrical appliances must only be repaired by 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 | 25 ft. | 50 ft. | 100 ft. | 150 ft. |
|---|---|---|---|---|
| 2.5A | 18 gauge | 16 gauge | 14 gauge | 12 gauge |
- EXAMINE 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.
- DO NOT ABUSE EXTENSION CORD: Do not pull on cord to disconnect from receptacle; always disconnect by pulling on 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.
- 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.
Know Your Chainsaw
TOOL PURPOSE
This chainsaw is designed to saw wood. Refer to the diagram below to become familiarized with the parts and controls of your 40V Max Lithium Ion Cordless Chainsaw.
Diagram of the WEN 40V Max Lithium Ion Cordless Chainsaw with numbered parts: 1. Trigger, 2. Safety Switch, 3. Battery, 4. Battery Release Button, 5. Front Handle, 6. Hand Guard/Chain Break, 7. Oil Cap, 8. Guide Bar, 9. Chain, 10. Side Cover Lock, 11. Side Cover, 12. Chain Tension Wheel.
| Red Light | Green Light | Status | Description |
|---|---|---|---|
| On | Off | Standby | The battery is not connected and charger is in standby mode. |
| On | Flashing | Charging | The battery is charging. |
| Off | On | Fully Charged | The battery is fully charged and should be removed from the charger. |
| Flashing | Off | Error | There is a problem with the battery. Contact customer service at 1-800-232-1195 for assistance in replacing the battery. |
| Flashing | Flashing | Temperature Error | The temperature is either too high or too low. If the battery is warm, remove it from the charger for a few minutes to let it cool down. Once the temperature returns to the normal temperature range (50°F - 104°F), you can continue charging the battery. |
Assembly and Adjustments
WARNING: Do not plug in or turn on the tool until it is fully assembled according to the instructions. Failure to follow the safety instructions may result in serious personal injury.
FILLING THE AUTO OIL SYSTEM
This chainsaw features an auto-oiling system to keep the chain and guide bar properly lubricated. The oil level indicator shows the remaining oil in the chainsaw. If the oil level decreases to below one quarter capacity, refill it with the proper bar and chain oil. To fill the oil reservoir:
- Remove the oil cap. Fill the reservoir with bar and chain oil (not included) until the oil level has reached full capacity.
- Put the oil cap back on. Make sure to check the oil level after every 10 minutes of use. Unplug the chainsaw before checking oil levels or filling the oil reservoir.
REMOVING AND CHARGING THE BATTERY
- Press the battery release button (located in front of the battery compartment) to release the battery. Slide the battery out of the saw.
- Slide the battery into the charger. Refer to Tables A (p. 13) & B (below) to understand what the lights on the battery and charger indicate.
- If using the battery, take the battery off of the charger and place it in your desired WEN tool. If storing the battery, unplug the charger from the power source and leave the battery on the charger.
- Unplug the charger from the power source when charging is complete. Never leave your charger plugged in if it is not charging a battery.
ATTACH/REMOVE THE BATTERY
Note: The battery is not fully charged at the time of purchase. Before using the chainsaw for the first time, place the battery in the charger and charge it fully.
To insert the battery, slide it into the battery compartment until a “click” is heard. Make sure the battery is fully inserted and latched into position. To remove the battery, press the release button and slide the battery out of the chainsaw.
| Number of Lights On | Description |
|---|---|
| All 4 | The battery is fully charged and ready for use. |
| 3 - 2 | The battery is partially charged. |
| 1 Blinking | The battery is dead and needs to be immediately recharged. If you do not charge the battery right away, the battery's lifetime will be drastically shortened. You should not let your battery go below a 20% charge; this will preserve your battery's life. |
ASSEMBLY OF GUIDE BAR AND SAW CHAIN
- Place the saw body on a firm and level surface.
- Rotate the bar guide bar lock counterclockwise to remove the cover from the saw's body.
- While wearing protective gloves, wrap the saw chain around the guide bar, making sure that the teeth are aimed in the direction of rotation. The chain should be properly set in the slot running along the entire outside edge of the guide bar.
- Place the saw chain around the sprocket while lining up the slot in the guide bar with the bolt at the base of the saw and the chain tensioning pin in the guide bar's pin hole. The chain tensioning pin may need adjustment to properly align with the hole in the guide bar. Use the chain tensioning wheel to adjust its location until it fits in the guide bar.
- Turn the chain tensioning wheel to preliminarily tighten the guide bar enough that it stays in place. While holding the bar still, place the cover back onto the saw. Make sure the tab on the left end of the cover goes into the slot on the body of the saw. Lock the cover in place with the cover locking knob by turning it clockwise until it engages. Adjust tension (next section).
Diagram illustrating chain assembly: Fig. 1 shows cover removal. Fig. 2 shows chain placement around sprocket, alignment with bolt and tensioning pin, and the tensioning wheel. Fig. 3 shows cover placement and locking knob.
TENSIONING THE CHAIN
NOTE: The saw chain must be tensioned properly in order to ensure safe operation. The chain tension is optimal if the saw chain can be lifted 1/8 inch (3 mm) from the center of the guide bar. Since the saw chain heats up during operation, its length can therefore fluctuate. Check the chain tension every 10 minutes of operation and adjust as necessary, particularly for new saw chains. Slacken the saw chain after the work is completed since it shortens when cooling down. In doing so, you can elongate the chain's life and prevent damage.
- Check the chain tension by pulling the saw chain away from the guide bar. A properly tensioned chain should have roughly 1/8 inch (3 mm) of distance between itself and the bar guide.
- If adjustments are needed, loosen the cover locking knob one full turn.
Adjusting Chain Tension
- To adjust the saw chain tension, rotate the chain tensioning wheel. Rotating the wheel upwards increases the tension while rotating it downwards decreases tension. A properly tensioned chain should have no sag and should only be able to be pulled 1/8 inch (3 mm) away from the guide bar of the saw.
- Once the chain is properly tensioned, tighten the cover locking knob. Do not over-tension the chain: this will lead to excessive wear and reduces the life of both the bar and chain.
Diagrams showing chain tension adjustment: Fig. 4 illustrates checking chain tension (1/8 inch gap). Fig. 5 shows the tensioning wheel. Fig. 6 shows correct (checkmark) and incorrect (cross) chain tension. Fig. 7 shows chain links and orientation.
REPLACING THE CHAIN
- Rotate the cover locking knob and remove the cover of the saw's body.
WARNING: When handling saw chains, always wear protective gloves.
- Lift the worn saw chain out of the fitted slot in the guide bar.
- Place the new chain in this position, making sure the teeth are facing the correct direction and that the edge of the chain fits into the slot around the guide bar.
- Replace the cover. Adjust tension before operating.
Operation
WARNING: It is recommended that first-time chainsaw users should practice cutting logs on a saw-horse or cradle.
PREPARATION
Before each use, check the following items to ensure safe working conditions.
- CHAINSAW: Before beginning work, inspect the chainsaw for damage to the housing, the saw chain and the guide bar. Never use an obviously damaged machine.
- CHAIN OIL: Check the fill level of the oil tank. Also check whether there is sufficient oil available while working. Never operate the saw if there is no oil or the oil level has dropped below the minimum oil level mark in order to prevent damage to the chainsaw. On average, an oil filling is sufficient for approximately 10 minutes of cutting operation (depending the duration of pauses and the density of the workpiece).
- SAW CHAIN: Check the tension of the saw and the condition of the blades. The sharper the saw chain is, the easier and more manageable operations will be. The same applies to chain tension. Check the tension every 10 minutes of operation to maximize safety. New saw chains in particular are subject to changes due to the heat created by operation. Never allow the saw chain to contact dirt or soil.
- PROTECTIVE CLOTHING: Make absolutely sure to wear the appropriate close-fitting protective clothing such as protective pants, gloves and safety shoes. Wear a safety helmet with integrated hearing protection and a face guard to provide protection against falling and recoiling branches.
SAFETY WARNINGS
- In order to ensure safe work, do not operate the saw above shoulder height.
- Never stand below a branch that is being sawed.
- Exercise caution when sawing branches under tension or branches that are splintering.
- Make sure to safeguard against the risk of injury from falling branches and flying wood projectiles.
- If the machine is operating, keep people and animals away from the area.
- The machine is not protected against electric shock when coming into contact with high-voltage lines. Maintain a minimum clearance of 30 feet from current-carrying power lines to avoid life-threatening electric shock.
- When working on an incline, always stand above or to the side of the branch being sawed.
- Allow the chain to cut for you. Keep the saw running at full speed for the entire duration of the cut.
PREVENTING KICKBACK
The term kickback refers to when the saw suddenly jumps up and back. This is usually caused by the workpiece coming into contact with the guide bar tip or the clamping of the saw chain.
A kickback generates an abrupt powerful force. The saw usually reacts in an uncontrolled manner, creating the possibility of injury to the user.
The danger of a kickback is greatest when attempting to cut near or with the guide bar tip. Always apply the saw as flatly as possible in order avoid a loss of control during operation.
TEST THE KICKBACK BRAKE (FIG. 8)
The kickback brake is a safety mechanism that is activated by the front hand guard. The chain should stop immediately when kickback occurs. The kickback brake function should be tested before each use.
Diagram showing the kickback brake mechanism: Fig. 8 illustrates the brake in use and deactivated.
To test the kickback brake:
- Push the front hand guard forward and try to start the chain. The chain should not start. If the chain does start, the brake is not working and must be repaired.
- Release the ON/OFF switch. To deactivate the kickback brake, pull the hand guard backwards. The chain should now start when the ON/OFF switch is pressed. The chain should also stop immediately when the hand guard is pushed forward while the chain is running.
WARNING: Do not rely on the kickback brake to reduce the possibility of injury due to kickback. Read prevention instructions above and on page 5 of this manual.
ON/OFF SWITCH
To turn the tool ON: press the safety button (Fig. 9 - 1) and then squeeze the trigger (Fig. 9 - 2). After the tool has started, you can release the safety switch without turning the tool off.
To turn the tool OFF: release the trigger switch (Fig. 9 - 2).
Diagram showing the ON/OFF switch controls: Fig. 9 labels the safety button (1) and the trigger (2).
FELLING A TREE
When bucking and felling operations are being performed by two or more people at the same time, the felling operations should be separated from the bucking operation by a distance of at least twice the height of the tree being felled. Trees should not be felled in a manner that would endanger any person, strike any utility line or cause any property damage. If the tree does make contact with any utility line, the company should be notified immediately.
The chain saw operator should keep on the uphill side of the terrain as the tree is likely to roll or slide downhill after it is felled.
Diagram illustrating felling safety: Fig. 10 shows danger zones and escape routes relative to the felling direction.
An escape path should be planned and cleared as necessary before cuts are started. The escape path should extend back and diagonally to the rear of the expected line of fall (Fig. 10).
Felling Back a Cut
Before felling is started, consider the natural lean of the tree, the location of larger branches and the wind direction to judge which way the tree will fall. Remove dirt, stones, loose bark, nails, staples and wire from the tree.
Make the notch 1/3 the diameter of the tree, perpendicular to the direction of fall (Fig. 11). Make the lower horizontal notching cut first. This will help to avoid pinching either the saw chain or the guide bar when the second notch is being made.
Make the felling back cut at least 50mm higher than the horizontal notching cut (Fig. 11). Keep the felling back cut parallel to the horizontal notching cut. Make the felling back cut so enough wood is left to act as a hinge. The hinge wood keeps the tree from twisting and falling in the wrong direction. Do not cut through the hinge.
As the felling gets close to the hinge, the tree should begin to fall. If there is any chance that the tree may not fall in desired direction or it may rock back and bind the saw chain, stop cutting before the felling back cut is complete and use wedges of wood, plastic or aluminum to open the cut and drop the tree along the desired line of fall.
When the tree begins to fall remove the chainsaw from the cut, stop the motor, put the chain saw down, then use the retreat path planned. Be alert for overhead limbs falling and watch your footing.
Diagrams for felling: Fig. 11 illustrates undercutting and felling back cut, showing the notch, hinge, and measurements.
Bucking a Log
Bucking is cutting a log into lengths. It is important to make sure your footing is firm and your weight is evenly distributed on both feet. When possible, the log should be raised and supported by the use of limbs, logs or chocks. Follow these simple directions for easy cutting.
When the log is supported along its entire length (Fig. 12), it is cut from the top (overbuck).
When the log is supported on one end (Fig. 13), cut 1/3 the diameter from the underside (underbuck). Then make the finished cut by overbucking to meet the first cut.
Diagrams for bucking: Fig. 12 shows cutting a log supported along its entire length. Fig. 13 shows cutting a log supported on one end.
When the log is supported on both ends (Fig. 14), cut 1/3 the diameter from the top (overbuck). Then make the finished cut by underbucking the lower 2/3 to meet the first cut.
When bucking on a slope always stand on the uphill side of the log (Fig. 15). When cutting through, to maintain complete control, release the cutting pressure near the end of the cut without relaxing your grip on the chain saw handles. Don't let the chain contact the ground. After completing the cut, wait for the saw chain to stop before you move the chain saw. Always stop the motor before moving from tree to tree.
Diagrams for bucking: Fig. 14 shows cutting a log supported on both ends. Fig. 15 illustrates bucking a log on a slope, emphasizing standing uphill.
NOTE: Never allow the saw chain to contact dirt or soil, doing so will severely dull the cutting links and shorten the life of the chain.
Limbing a Tree
Limbing is removing the branches from a fallen tree. When limbing leave larger lower limbs to support the log off the ground. Remove the small limbs in one cut (Fig. 16). Branches under tension should be cut from the bottom up to avoid binding the chain saw.
Diagram for limbing: Fig. 16 shows tree limbing, indicating limb cuts and leaving support limbs.
SAWING TECHNIQUES
Saw off the lower branches on the tree first. By doing so, it is easier for the cut branches to fall to the ground.
At the end of the cut, the weight of the saw suddenly increases for the user since it is no longer being supported by a branch. There is a risk of losing control of the saw, so make sure to stay alert during the entire sawing operation.
Only pull the saw out of a cut while the saw is running. By doing so, you prevent the chain from jamming in the wood.
Do not saw with the tip of the guide bar. Do not saw into the branch formations (where the tree branches outwards). This will impede the tree's ability to heal.
For sawing off smaller branches, place the stop face of the saw on the branch. This prevents unwanted movements of the saw at the beginning of the cut. While applying light pressure, guide the saw through the branch from top to bottom.
For sawing off larger branches, first make a relief cut. Saw through 1/3 of the branch diameter from the bottom to top using the top side of the guide bar. Then saw from top to bottom for the other 2/3 using the bottom side of the guide bar. Saw off longer branches in sections in order to maintain control over the location of impact.
Maintenance
WARNING: In order to avoid personal injury and the risk of fire and electric shock, remove the battery pack before adjusting, inspecting, or cleaning the chainsaw.
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. Use of other parts may be hazardous or induce product failure.
WARNING: Fully charge your battery every 3 months to preserve your battery's life. Do not let your battery get below 20% charge; this will cause your battery to prematurely fail. See Tables A and B below to understand what the LED lights on your charger and battery indicate.
CLEANING & STORAGE
- Brush or blow dust and debris out of the air vents using compressed air or a vacuum. Keep the air vents free of obstructions, sawdust, and wood chips. Do not spray, wash, or immerse the air vents in water.
- Wipe off the housing and the plastic components using a moist, soft cloth. Do not use strong solvents or detergents on the plastic housing or plastic components. Certain household cleaners may cause damage, and may cause a shock hazard.
- Routinely clean out the dust and debris that gathers under the tension housing, the oil outlet, and around the bar and the chain sprocket. Otherwise it can jam up the sprocket, the chain, and the lubrication system.
CHARGING THE BATTERY
See instructions on page 14.
STORING THE BATTERY AND CHARGER
- Make sure the battery is fully charged before storage in order to maximize the life of the battery.
- Do not store the battery pack on the tool. Remove the battery from the tool before storage.
- After charging, the battery pack may be stored in the charger, as long as the charger is not plugged in.
- Store the charger at normal room temperature. Do not store it in excessive heat. Do not use the charger in direct sunlight or in damp conditions. Do not charge outside. Recharge at room temperature.
- Keep the charger clean and clear of debris. Do not allow foreign material to get into the recessed cavity or onto the contacts. Wipe the charger clean with a dry cloth. Do not use solvents or water, and do not place the charger in wet conditions.
- Always unplug the charger when charging is complete. Never leave your charger plugged in if it is not charging a battery.
Storage
Examine the chainsaw thoroughly for worn, loose or damaged parts. If you need assistance, contact WEN customer service at 1-800-232-1195.
Remove the battery from the tool before storing and unplug the charger before storing.
Store your chainsaw, 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. Always store battery and charger indoors.
CAUTION !
Image depicting lithium ion batteries with warning symbols indicating fragility and damage.
Lithium ion battery
DO NOT LOAD OR TRANSPORT PACKAGE IF DAMAGED
For more information call 1-800-232-1195
THIS SHIPMENT CONTAINS LITHIUM ION BATTERIES: Please handle with care. Fragile contents. Keep dry.
A flammable hazard exits if this package becomes damaged. Special procedures must be followed in the event this package becomes damaged. Call the number below for a Safety Data Sheet.
For more information call 800-232-1195.
Exploded View & Parts List
A detailed exploded view diagram of the WEN 40V Max Lithium Ion Cordless Chainsaw, illustrating the assembly of its various components.
| No. | Part No. | Description | Qty. | No. | Part No. | Description | Qty. |
|---|---|---|---|---|---|---|---|
| 1 | Blade Tension Cap Assembly | 1 | 23 | 40417-023 | Clamp | 1 | |
| 1-1 | Tension Lock Knob | 1 | 24 | 40417-024 | Motor | 1 | |
| 1-2 | 40417-001 | Spindle Cover | 1 | 24-1 | 40417-043 | Retaining Ring | 1 |
| 1-3 | Bar Cover | 1 | 24-2 | 40417-042 | Sprocket | 1 | |
| 1-4 | Cover Seal | 1 | 24-3 | 40417-041 | Spring | 1 | |
| 2 | 40417-002 | Chain | 1 | 24-4 | 40417-024.4 | Brushless Motor | 1 |
| 3 | 40417-003 | Guide Bar | 1 | 24-5 | 40417-024.5 | Oil Pump | 1 |
| 4 | 40417-004 | Sheath | 1 | 24-6 | 40417-024.6 | Tapping Screw | 2 |
| 5 | 40417-005 | Oil Feed Seal | 1 | 25 | 40417-025 | Shaft | 1 |
| 6 | 40417-006 | Screw | 22 | 26 | 40417-026 | Spring | 1 |
| 7 | 40417-007 | Screw | 2 | 27 | 40417-027 | Screw | 1 |
| 8 | 40417-008 | Insulating Washer | 1 | 28 | 40417-028 | Torsion Spring | 1 |
| 9 | 40417-009 | Tension Adjusting Knob | 1 | 29 | 40417-029 | Trigger | 1 |
| 10 | 40417-010 | Tension Adjustment Rod | 1 | 30 | 40417-030 | Safety Button | 1 |
| 11 | 40417-011 | Screw | 3 | 31 | 40417-031 | Safety Spring | 1 |
| 12 | 40417-012 | Bucking Teeth | 1 | 32 | 40417-032 | PCB | 1 |
| 13 | 40417-013 | Right Housing | 1 | 33 | Oil Tank Assembly | 1 | |
| 14 | 40417-014 | Screw | 4 | 33-1 | Oil Tank | 1 | |
| 15 | 40417-015 | Upper Cover | 1 | 33-2 | Filter | 1 | |
| 16 | Brake Handle Assembly | 1 | 33-3 | Seal | 1 | ||
| 16-1 | 40417-016 | Brake Handle | 1 | 33-4 | Oil Tube (90) | 1 | |
| 16-2 | Guard Plate | 1 | 33-5 | Spring (60) | 1 | ||
| 16-3 | Screw | 2 | 34 | 40417-034 | Left Housing | 1 | |
| 17 | 40417-017 | Oil Outlet Nozzle | 1 | 35 | 40417-035 | Handle | 1 |
| 18 | 40417-018 | Housing Vent | 1 | 36 | 40417-036 | Rubber Washer | 1 |
| 19 | 40417-019 | Battery Pack Release Spring | 1 | 37 | Oil Cap Assembly | 1 | |
| 20 | 40417-020 | Battery Pack Release Lever | 1 | 37-1 | Hanger | 1 | |
| 21 | 40417-021 | Lock | 1 | 37-2 | Seal Ring | 1 | |
| 22 | 40417-022 | Brake Spring | 1 | 37-3 | Oil Cap | 1 | |
| 38 | 40417-038 | Oil Tube (120) | 1 | ||||
| 39 | 40400C | Charger | 1 | ||||
| 40 | 40404 | 4.0Ah Battery | 1 |
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 CONSUMER POWER TOOLS 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 for a period of two (2) years from date of purchase. Ninety days for all WEN products if the tool is used for professional or commercial use.
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 repair or replacement of parts, without charge, which are defective in material or workmanship and which have not been misused, carelessly handled, or misrepaired by persons other than Seller or Authorized Service Center. 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 vendor of Great Lakes Technologies, LLC. Third party vendors such as garage sales, pawn shops, resale shops, or any other secondhand merchant void the warranty included with this product.
Contact techsupport@wenproducts.com or 1-800-232-1195 to make arrangements for repairs and transportation.
When returning 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 warranty card and/or 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.
THIS LIMITED WARRANTY DOES NOT APPLY TO ACCESSORY ITEMS THAT WEAR OUT FROM REGULAR USAGE OVER TIME INCLUDING BELTS, BRUSHES, BLADES, ETC. ANY IMPLIED WARRANTIES SHALL BE LIMITED IN DURATION TO TWO (2) YEARS FROM DATE OF PURCHASE. SOME STATES IN THE U.S., 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 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 PORTABLE ELECTRIC TOOLS, BENCH POWER TOOLS, OUTDOOR POWER EQUIPMENT AND PNEUMATIC TOOLS 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.
