40V Lithium-Ion String Trimmer ST40B410 Owner’s Manual TOLL-FREE HELPLINE: 1-888-90WORKS (888.909.6757) www.GreenWorksTools.com Read all safety rules and instructions carefully before operating this tool.
CONTENTS Contents............................................................................................................................... 2 Product Specifications ......................................................................................................... 2 Important Safety Instructions................................................................................................ 3 Symbols...................................................................................................
important safety instructions WA R N I N G Read and understand all instructions before using this product. Failure to follow all instructions listed below may result in electric shock, fire, and/or serious personal injury. • Use only identical manufacturer’s replacement parts and accessories. Use of any other parts may create a hazard or cause product damage. • Always wear safety glasses with side shields marked to comply with ANSI Z87.1. Everyday glasses have only impact resistant lenses.
important safety instructions • Do not dispose of the batteries in a fire. The cells may explode. Check with local codes for possible special disposal instructions. • Do not open or mutilate the batteries. Released electrolyte is corrosive and may cause damage to the eyes or skin. It may be toxic if swallowed. • Exercise care in handling batteries in order not to short the battery with conducting materials such as rings, bracelets, and keys. The battery or conductor may overheat and cause burns.
important safety instructions CHILD SAFETY Tragic accidents can occur if the operator is not aware of the presence of children. • Keep children out of the working area and under the watchful care of a responsible adult. • Do not allow children under the age of 14 to operate this trimmer. Children who are 14 years of age and older must read and understand the operating instructions and safety rules in this manual and must be trained and supervised by a parent.
SymbolS Some of the following symbols may be used on this product. Please study them and learn their meaning. Proper interpretation of these symbols will allow you to operate the product better and safer.
SymbolS The following signal words and meanings are intended to explain the levels of risk associated with this product. SYMBOL SIGNAL MEANING DANGER Indicates an imminently hazardous situation, which, if not avoided, will result in death or serious injury. WARNING Indicates a potentially hazardous situation, which, if not avoided, could result in death or serious injury.
know your string trimmer 7 1 2 3 4 5 6 8 9 Fig.
know your string trimmer KNOW YOUR string trimmer (See Figure 1.) The safe use of this product requires an understanding of the information on the product and in this operator’s manual as well as a knowledge of the project you are attempting. Before use of this product, familiarize yourself with all operating features and safety rules. 1. REAR HANDLE Ergonomic handle with overmold improves comfort and grip. 2.
ASSEMBLY UNPACKING This product requires assembly. • Carefully remove the product and any accessories from the box. Make sure that all items listed in the packing list are included. • Inspect the tool carefully to make sure no breakage or damage occurred during shipping. • Do not discard the packing material until you have carefully inspected and satisfactorily operated the tool. • If any parts are damaged or missing, please call 1-888-909-6757.
ASSEMBLY WA R N I N G If any parts are damaged or missing, do not operate this product until the parts are replaced. Use of this product with damaged or missing parts could result in serious personal injury. WA R N I N G Do not attempt to modify this product or create accessories not recommended for use with this string trimmer. Any such alteration or modification is misuse and could result in a hazardous condition leading to possible serious personal injury.
ASSEMBLY attaching the Guard (see Figure 2.) NOTE: Install the guard before the attachment is connected to the lower shaft. 1. 2. Invert the string trimmer to access the trimmer head. Remove supplied screws (1) from the trimmer head with a philips screwdriver. 1 Fig. 2.1 3. 4. Place the guard (2) on to the trimmer head. Align the screw holes on the guard (3) with the screw holes on the trimmer head (4) 2 3 4 Fig. 2.2 5.
ASSEMBLY iNSTALLING THE UPPER SHAFT TO THE LOWER SHAFT (See Figure 3.) WA R N I N G Never install, remove, or adjust any attachment while string trimmer is running. Failure to stop the motor can cause serious personal injury. The attachment connects to the power head by means of a coupler device. 1. Set the unit on a flat, level surface. 2. Loosen the knob (1) on the coupler (5). 3. Push in the release button (2) located on the lower shaft (3).
ASSEMBLY attaching the Auxiliary handle (See Figure 4.) 1. 2. Press the auxiliary handle (1) onto the upper shaft so that the handle is angled toward the rear handle that allows for comfortable operation. Slide the auxiliary handle over the metal ring (2) and ensure the metal ring fits between the slot on the auxiliary handle. 1 2 3. 4. Fig. 4.1 Align the holes on the auxiliary handle with the holes on metal ring. Insert the handle knob (3) through the auxiliary handle. 3 Fig. 4.2 5.
ASSEMBLY line trimming cut-off blade (See Figure 5.) The trimmer is equipped with a line trimming cut-off blade on the guard. Replace the string when trimming efficiency diminishes. This will maintain best performance. CUT-OFF BLADE Fig.
OPERATIon WA R N I N G Read and understand entire Operator's Manual for each optional attachment used on this power head and follow all warnings and instructions. Failure to follow all instructions may result in electric shock, fire and/or serious personal injury. WA R N I N G Do not allow familiarity with this product to make you careless. Remember that a careless fraction of a second is sufficient to inflict serious injury.
OPERATIon INSTALLING THE BATTERY PACK (See Figure 6.) • Place the battery pack in the trimmer. Align raised ribs (3) on battery pack with grooves in the trimmer’s battery port. • Make sure the latch on the back of the battery pack clicks into place and that battery pack is fully seated and secure in the trimmer before beginning operation. REMOVING THE BATTERY PACK (See Figure 6.) • Release the switch trigger and lock-out trigger to stop the trimmer.
OPERATIon operating the trimmer (See Figure 8.) WA R N I N G Always hold the string trimmer away from the body keeping clearance between the body and the string trimmer. Any contact with the string trimmer cutting head while operating can result in serious personal injury. Follow these tips when using the string trimmer: • Hold the trimmer with your right hand on the reat handle and your left hand on the auxiliary handle. • Keep a firm grip with both hands while in operation.
OPERATIon WA R N I N G Any contact with the attachment cutting head can result in burns and/or other serious personal injury. WA R N I N G Read the safety information for safe operation when using a blade attachment and refer to the safety rules and instructions in your attachment manual. Never use a brush cutter attachment with this electric power head. Improper operation of a blade or any attachment could result in serious injury. ADVANCING LINE The trimmer is equipped with an auto-feed head.
OPERATIon replacing the line (See Figure 10.) 1. Press the tabs simultaneously on the side of the trimmer head and remove cover and spool. Tab Cover Spool Fig. 10-1 2. 3. 4. Remove any remaining line. Clean dirt and debris from all parts. Replace spool if it is worn or damaged. Replace with a pre-wound spool (#2900719), or replace line using two lines. WA R N I N G Never use wire, rope, string, etc., which can break off and become a dangerous projectile. 5.
OPERATIon 6. Bend one end of the line 1/4 of an inch (0.002 ft.). Fig. 10-3 7. Insert one line into the anchor hole in the upper part of the spool while the other line into the anchor hole in the bottom part of the spool. Fig. 10-4 8. Wind the lines clockwise around the spool simultaneously, as shown by the arrows on the spool. Fig. 10-5 9. Place lines in the slot on the upper spool flange, leaving about 6 in. ( 152mm ) extended beyond the slot. Fig. 10-6 NOTE: Do not overfill.
OPERATIon 11. Insert the ends of the lines through line exit holes in the sides of the cover. Line exit hole Trimmer head Fig. 10-8 12. Reinstall the cover onto the trimmer head. Push until cover snaps into place. Fig.
OPERATIon cutting tips (See Figure 11.) • Keep the trimmer tilted toward the area being cut; this is the best cutting area. • The trimmer cuts when passing the unit from right to left. This will avoid throwing debris at the operator. Avoid cutting in the dangerous area shown in figure 11. • Use the tip of string to do the cutting; do not force string head into uncut grass. • Wire and picket fences cause extra string wear and breakage. Stone and brick walls, curbs, and wood may wear string rapidly.
BATTERY & CHARGER MAINTENANCE CHECKING BATTERY CAPACITY Press the battery capacity indicator (BCI) button. The lights will illuminate according to the batteries capacity level.
BATTERY & CHARGER MAINTENANCE CHECKING THE CHARGE If the battery pack does not charge properly: • Check the current at the power outlet with another tool. Make sure that the outlet is not turned off. • Check that the charger contacts have not been shorted by debris or foreign material. • If the surrounding air temperature is not normal room temperature, move the charger and battery pack to a location where the temperature is between 45 ˚F and 104˚F .
MAINTENANCE general maintenance Avoid using solvents when cleaning plastic parts. Most plastics are susceptible to damage from various types of commercial solvents and may be damaged by their use. Use clean cloths to remove dirt, dust, lubricant, grease, etc. Always store the machine clean and in a dry enclosure with the battery charged.
ENVIRONMENTALLY SAFE BATTERY DISPOSAL The following toxic and corrosive materials are in the batteries used in this string trimmer battery pack: Lithium-Ion, a toxic material. WA R N I N G All toxic materials must be disposed of in a specified manner to prevent contamination of the environment. Before disposing of damaged or worn out Lithium-Ion battery packs, contact your local waste disposal agency, or the local Environmental Protection Agency for information and specific instructions.
troubleshooting Problem Cause 1. The battery pack is not attached to the trimmer. 2. No electrical contact between the trimmer and battery. Solution 1. Attach the battery pack to the trimmer. 2. Remove battery check contact and reinstall the battery pack. 3. The battery pack is String trimmer depleted. fails to start. 4. The lock-off lever and trigger are not depressed simultaneously. 3. Charge the battery pack. 4.
troubleshooting Problem Cause Solution 1. The motor shaft or 1. Stop the trimmer, remove the battery, trimmer head is bound with and clean the motor shaft and trimmer grass. head. 2. There is not enough line 2. Remove the battery and replace on the spool. the cutting line; follow the section “line replacement”in this manual. Trimmer head will not advance line. 3. The trimmer head is dirty. 3. Remove the battery and clean the spool, spool retainer and spool base. 4. The line is tangled on the spool.
LIMITED WARRANTY GREENWORKS™ hereby warranties this product, to the original purchaser with proof of purchase, for a period of four (4) years against defects in materials, parts or workmanship. GREENWORKS™, at its own discretion will repair or replace any and all parts found to be defective, through normal use, free of charge to the customer.
EXPLODED VIEW 31
parts list Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Part No.
TOLL-FREE HELPLINE: 1-888-90WORKS (888.909.
