DEWALT DCHT821 Hedge Trimmer Instruction Manual

DEWALT DCHT821 Hedge Trimmer

Specifications :

• Model: DCHT821
• Power: 20V Max*
• Usage: Professional landscaping applications

Product Usage Instructions

Safety Precautions

Before using the DEWALT DCHT821 hedge trimmer, familiarize yourself with the safety guidelines provided in the manual. Always wear appropriate safety gear such as gloves and eye protection.

Operating the Hedge Trimmer

1. Ensure the battery pack is fully charged before use.
2. Press and hold the On/Off trigger switch (1) to start the trimmer.
3. Use the main handle (3) and bail handle (5) for a comfortable grip.
4. Keep the blade guard (4) in place during operation to prevent accidents
5.  To stop the trimmer, release the On/Off trigger switch.

Maintenance
Regularly inspect the blade for any damage or signs of wear. Keep the trimmer clean and store it in a dry place when not in use. Follow the maintenance instructions provided in the manual.

FAQ :

• Q: What is the intended use of the DEWALT DCHT821 hedge trimmer?
  A: The hedge trimmer is designed for professional landscaping applications.

• Q: Can children use the hedge trimmer?
  A: Children should not come into contact with the tool, and supervision is required when inexperienced operators use it.Q: What are the safety alert symbols used in the manual?
  A: The manual uses symbols like DANGER, WARNING, CAUTION, and NOTICE to alert users to hazardous situations.

• Q: How should I store the hedge trimmer?
  A: Store the trimmer in a dry place away from moisture and extreme temperatures.

Instruction Manual Guide

DCHT821
20V Max Hedge Trimmer Taille‑haie 20 V max Cortasetos 20V Max*

If you have questions or comments, contact us.
Pour toute question ou tout commentaire, nous contacter. Si tiene dudas o comentarios, contáctenos.
1‑800‑4‑DEWALT

1. On/Off trigger switch
2. Lock-off lever
3. Main handle
4. Blade guard
5. Bail handle
6. Blade
7. Battery pack
8. Battery release button
9. Sheath

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.
WARNING: To reduce the risk of injury, read the instruction manual.

Intended Use

• Your DEWALT DCHT821 hedge trimmer has been designed for professional landscaping applications.
• DO NOT use under wet conditions or in the presence of flammable liquids or gases.
• This hedge trimmer is a professional power tool.
• DO NOT let children come into contact with the tool. Supervision is required when inexperienced operators use this tool.
• Definitions: Safety Alert Symbols and Words
• This instruction manual uses the following safety alert symbols and words to alert you to hazardous situations and your risk of personal injury or property damage.
  • 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.
  • CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. (Used without word) Indicates a safety related message.
  • NOTICE: Indicates a practice not related to personal injury which, if not avoided, may result in property damage.

GENERAL POWER TOOL SAFETY WARNINGS

WARNING: Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.

SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE.
The term “power tool” in the warnings refers to your mains‑operated (corded) power tool or battery‑operated (cordless) power tool.

1. 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.
   • Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
2. 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.
3. Personal Safety
   • Stay alert, watch what you are doing and usecommon 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, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.
   • 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.
   • 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.
   • Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
   • 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.
   • 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.
   • Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.
4. 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 remove the battery pack, if detachable, 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 and accessories. 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.
   • Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
   • 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.
   • Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.
5. Battery Tool 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.
   • Do not use a battery pack or tool that is damaged or modified. Damaged or modified batteries may exhibit unpredictable behavior resulting in fire, explosion or risk of injury.
   • Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperature above 265 °F (130 °C) may cause explosion.
   • Follow all charging instructions and do not charge the battery pack or tool outside the temperature range specified in the instructions. Charging improperly or at temperatures outside the specified range may damage the battery and increase the risk of fire.
6. 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.
   • Never service damaged battery packs. Service of battery packs should only be performed by the manufacturer or authorized service providers.

Safety Instructions for Hedge Trimmers Hedge Trimmer Safety Warnings

DANGER : Keep all parts of the body away from the blade. Do not remove cut material or hold material to be cut when blades are moving. Blades continue to move after the switch is turned off. A moment of inattention while operating the hedge trimmer may result in serious personal injury.

• Carry the hedge trimmer by the bail handle with the battery removed, the blade stopped and taking care not to operate any power switch. Proper carrying of the hedge trimmer will decrease the risk of inadvertent starting and resultant personal injury from the blades.
• When transporting or storing the hedge trimmer, always fit the blade cover. Proper handling of the hedge trimmer will decrease the risk of personal injury from the blades.
• When clearing jammed material or servicing the unit, make sure all power switches are off and the battery is removed. Unexpected actuation of the hedge trimmer while clearing jammed material or servicing may result in serious personal injury.
• Hold the hedge trimmer by insulated gripping surfaces only, because the blade may contact hidden wiring. Blades contacting a “live” wire may make exposed metal parts of the hedge trimmer “live” and could give the operator an electric shock.
• Keep all power cords and cables away from cutting area. Power cords or cables may be hidden in hedges or bushes and can be accidentally cut by the blade.
• Do not use the hedge trimmer in bad weather conditions, especially when there is a risk of lightning. This decreases the risk of being struck by lightning.

Hedge Trimmer Safety Warnings

• Use both hands when operating the hedge trimmer. Using one hand could cause loss of control and result in serious personal injury.
• This hedge trimmer is intended to be used by the operator at ground level and not on ladders or any other unstable support.
• Keep all parts of the body away from the cutter blade. Do not remove cut material or hold material to be cut when blades are moving. Make sure the switch is off when clearing jammed material. Blades coast after turn off. A moment of inattention while operating the hedge trimmer may result in serious personal injury.
• Check the hedge for foreign objects, e.g., wire fences.
• DANGER: Keep hands away from blade. Contact with blade will result in serious personal injury.
• WARNING: Wear eye protection.
• WARNING: Do not expose to rain.
• WARNING: Only use with bail handle and blade guard properly assembled to hedge trimmer. The use of the hedge trimmer without the proper guard or handle provided may result in serious personal injury.

Additional Safety Information

• WARNING: Never modify the power tool or any part of it. Damage or personal injury could result.
• WARNING: ALWAYS use safety glasses. Everyday eyeglasses are NOT safety glasses. Also use face or dust mask if operation is dusty. ALWAYS WEAR CERTIFIED SAFETY EQUIPMENT:
• ANSI Z87.1 eye protection (CAN/CSA Z94.3),
• ANSI S12.6 (S3.19) hearing protection,
• NIOSH/OSHA/MSHA respiratory protection.
• WARNING: Some dust contains chemicals known to State of California to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are: compounds in fertilizers, compounds in insecticides, herbicides and pesticides, arsenic and chromium from chemically treated lumber.
• To reduce your exposure to these chemicals, wear approved safety equipment such as dust masks that are specially designed to filter out microscopic particles.
• Avoid prolonged contact with dust from power sanding, sawing, grinding, drilling, and other construction activities. Wear protective clothing and wash exposed areas with soap and water. Allowing dust to get into your mouth, eyes, or lie on the skin may promote absorption of harmful chemicals.
• WARNING: Use of this tool can generate and/or disperse dust, which may cause serious and permanent respiratory or other injury. Always use NIOSH/OSHA approved respiratory protection.
• WARNING: Always wear proper personal hearing protection that conforms to ANSI S12.6 (S3.19) minuteduring use. Under some conditions and duration of use, noise from this product may contribute to hearing loss.
• CAUTION: When not in use, place tool on its side on a stable surface where it will not cause a tripping or falling hazard. Some tools with a large battery pack will stand upright but may be easily knocked over.
• Air vents often cover moving parts and should be avoided. Loose clothes, jewelry or long hair can be caught in moving parts.

The label on your tool may include the following symbols. The symbols and their definitions are as follows:

• BPM…………………beats per minute
• V…………………….. volts
• min………………….minutes
• j or DC………….direct current
• /min……………per minute
• RPM………………… revolutions per minute
• A……………………..amperes
• Hz……………………hertz
• W…………………….watts
• Wh…………………..watt hours
• no……………………no load speed
• n……………………..rated speed
• ………………….safety alert symbol
• …………………. wear respiratory protection
• …………………. wear eye protection
• …………………. Class II Construction (double insulated)
• …………………. wear hearing protection
• …………………. read all documentation
• …………………. do not expose to rain
• …………………. avoid staring at light
•  or AC…………alternating current
• Ah…………………… amp hours
• CSPM………………. cut strokes per minute

OPERATION

WARNING: To reduce the risk of serious personal injury, turn unit off and remove the battery pack before making any adjustments or removing/installing attachments or accessories. An accidental start‑up can cause injury.

Installing and Removing the Battery Pack (Fig. B)

WARNING: Ensure the tool/appliance is in the off  position before inserting the battery pack.
NOTE: For best results, make sure your battery pack is fully charged.

1. To install the battery pack  7  into the tool handle, align the battery pack with the rails inside the tool’s handle and slide it into the handle until the battery pack is firmly seated in the tool and ensure that it does not disengage.
2. To remove the battery pack from the tool, press the battery pack release button  8  and firmly pull the battery pack out of the tool handle.

Proper Hand Position (Fig. D)

• WARNING: To reduce the risk of serious personal injury, ALWAYS use proper hand position as shown.
• WARNING: To reduce the risk of serious personal injury, ALWAYS hold securely in anticipation of a sudden reaction.
• Proper hand position requires one hand on the main handle  3 and one hand on the bail handle  5 . Never hold the unit by the blade guard  4 .

Trigger Switch (Fig. C)

WARNING: Never attempt to lock a switch in the ON position.

1. To turn the tool “ON”, shift the lock off lever  2 and squeeze the trigger switch  1 . Once the unit is running, you may release the lock off button.
2. To turn the tool “OFF”, release the trigger.

Trimming Instructions (Fig. D–G)

• DANGER: Keep hands away from blade.
• WARNING: To guard against injury, observe the following:
  • Read instruction manual before using. Save instruction manual.
  • Check the hedge for foreign objects such as wires or fences before each use.
  • Keep hands on handles. Do not overreach.
  • Do not use under wet conditions.
• CAUTION: Blade may coast after turn off.
• CAUTION: Do not use blade to cut stems greater than 3/4″ (19 mm). Use the trimmer only for cutting normal shrubbery around houses and buildings.
• Working Position (Fig. D)
  • Maintain proper footing and balance and do not overreach. Wear safety goggles, non-skid footwear and gloves when trimming. Hold the tool firmly in both hands and turn the tool ON. Always hold the
  • trimmer, as shown in Fig. D. Refer to Proper Hand Position for more information. Never hold the tool by the blade guard.
• Trimming New Growth (Fig. E)
  • Using a wide, sweeping motion and feeding the blade teeth through the twigs is most effective. A slight downward tilt of the blade in the direction of motion gives the best cutting.
• Level Hedges (Fig. F)
  • To obtain exceptionally level hedges a piece of string can be stretched along the length of the hedge as a guide.
• Side Trimming Hedges (Fig. G)
  • Position the trimmer as shown and begin at the bottom and sweep upwards.

MAINTENANCE

WARNING: To reduce the risk of serious personal injury, turn unit off and remove the battery pack before making any adjustments or removing/installing attachments or accessories. An accidental start‑up can cause injury.

Your DEWALT power tool has been designed to operate over a long period of time with a minimum of maintenance. Continuous satisfactory operation depends upon proper tool care and regular cleaning.

Blade Maintenance (Fig. A, H)
The cutting blades are made from high quality, hardened steel and with normal usage, they will not require resharpening. However, if you accidentally hit a wire fence (Fig. H), stones, glass, or other hard objects, you may put a nick in the blade. There is no need to remove this nick as long as it does not interfere with the movement of the blade. If it does interfere, remove the battery pack 7 and use a fine toothed file or sharpening stone to remove the nick. If you drop the trimmer, carefully inspect it for damage. If the blade is bent, housing cracked, handles broken or if you see any other condition that may affect the tool’s operation contact your local authorized service center for repairs before putting it back into use.

Blade Lubrication (Fig. A)

1. After use, remove the battery pack 7 .
2. Carefully apply a resin solvent to the exposed blades.
3. Insert the battery pack and turn the tool vertical with the blades toward the ground and run the tool for a few seconds to fully disperse the lubrication.

Cleaning

• WARNING: Blow dirt and dust out of all air vents with clean, dry air at least once a week. To minimize the risk of eye injury, always wear ANSI Z87.1 approved eye protection when performing this procedure.
• WARNING: Never use solvents or other harsh chemicals for cleaning the non‑metallic parts of the tool. These chemicals may weaken the plastic materials used in these parts. Use a cloth dampened only with water and mild soap. Never let any liquid get inside the tool; never immerse any part of the tool into a liquid.

Accessories

WARNING: Since accessories, other than those offered by DEWALT, have not been tested with this product, use of such accessories with this product could be hazardous. To reduce the risk of injury, only DEWALT‑recommended accessories should be used with this product.

Recommended accessories for use with your product are available at extra cost from your local dealer or authorized service center. If you need assistance in locating any accessory, please contact DEWALT. Call 1-800-4-DEWALT (1-800-433-9258) or visit our website: www.dewalt.com.

Clippings Sweeper (Fig. I, J)(DCZHT800 sold separately)

WARNING: To reduce the risk of serious personal injury, turn unit off and remove the battery pack before making any adjustments or removing/installing attachments or accessories. An accidental start‑up can cause injury.

The DCZHT800 sweeper 11 is designed to collect and push clippings and debris from the hedge as you trim.

1. Align the slot on the bottom of the sweeper 11 to the blade rail 10 of the hedge trimmer as shown in Fig. I.
2. Slide the sweeper 11 fully onto the blade rail, towards the blade guard  4 .
3. Use the sweeper to collect and push clippings as you trim as shown in Fig. J.

Repairs
The charger and batteries are not serviceable. There are no serviceable parts inside the charger or battery pack.

WARNING: To assure product SAFETY and RELIABILITY, repairs, maintenance and adjustment (including brush inspection and replacement, when applicable) should be performed by a factory service center or an authorized service center. Always use identical replacement parts.

Register Online
Thank you for your purchase. Register your product now for:

• WARRANTY SERVICE: Registering your product will help you obtain more efficient warranty service in case there is a problem with your product.
• CONFIRMATION OF OWNERSHIP: In case of an insurance loss, such as fire, flood or theft, your registration of ownership will serve as your proof of purchase
• FOR YOUR SAFETY: Registering your product will allow us to contact you in the unlikely event a safety notification is required under the Federal Consumer Safety Act.

Register online at www.dewalt.com/account-login.

Three-Year Limited Warranty

• For warranty terms, go to

• www.dewalt.com/support/warranty.

• To request a written copy of the warranty terms, contact: Customer Service at DEWALT Industrial Tool Co., 701 East Joppa Road, Towson, MD 21286 or call 1-800-4-DEWALT (1-800-433-9258).
  LATIN AMERICA: This warranty does not apply to products sold in Latin America. For products sold in Latin America, see country-specific warranty information contained in the packaging, call the local company or see website for warranty information.

• FREE WARNING LABEL REPLACEMENT: If your warning labels become illegible or are missing, call 1-800-4-DEWALT (1-800-433-9258) for a free replacement.

Compatible battery packs and chargers

• Battery Packs
  DCB201, DCB203, DCB203G, DCB204, DCB204BT, DCB205, DCB205G, DCB205BT, DCB206, DCB208, DCB210, DCB230, DCB240, DCBP034, DCBP034G, DCBP320, DCBP520, DCBP520G, DCB2104, DCB2108, DCB606, DCB609, DCB609G, DCB612, DCB615.

• Chargers
  DCB094, DCB102, DCB103, DCB104, DCB107, DCB112, DCB113, DCB115, DCB118, DCB132, DCB1102, DCB1104, DCB1106, DCB1112, DWST08050

WARNING : Use of any other battery packs may create a risk of injury and fire.
NOTE : DO NOT charge when the battery pack is below 40 ° F (4.5 ° C) or above 104 ° F (40 ° C). Do not store or use the tool and battery pack in locations where the temperature may reach or exceed 104 ° F (40 ° C).

Maximum initial battery voltage (measured without a workload) is 20, 60 or 120 volts. Nominal voltage is 18, 54 or 108. (120V Max is based on using 2 DEWALT 60V Max lithium‑ion batteries combined.

DEWALT Industrial Tool Co., 701 East Joppa Road, Towson, MD 21286
Copyright © 2024
The following are trademarks for one or more DEWALT power tools: the yellow and black color scheme, the “D” shaped air intake grill, the array of pyramids on the handgrip, the kit box configuration, and the array of lozenge-shaped humps on the surface of the tool.

References

• DEWALT® Power Tools Official Site | Guaranteed Tough®
• DEWALT® Power Tools Official Site | Guaranteed Tough®

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