DCMHT520 - Cordless electric hedge trimmer DEWALT - Free user manual and instructions

USER MANUAL DCMHT520 DEWALT

English (original instructions) 14

Icon of a person using a computer (no text or symbols)

Fig. A

DEWALT 1 2 3 4 5 6 7

Fig. B

Diagram showing a device labeled with parts 5 and 6, indicating a step in assembly or installation.

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Fig. C Fig. D

Fig. D 3 8 0000 00-00

Diagram of a hand holding a comb with labeled parts and directional arrow indicating rotation or movement.

Fig. E Fig. F

0-15

Diagram showing a slope with an arrow indicating direction, surrounded by leafy ground (no text or symbols)

Fig. G

Diagram showing a curved arrow pointing upward through a leafy wall structure (no text or symbols)

Fig. H

Safety warning sign with warning triangle and Chinese text, depicting a railway safety hazard against leafy plants

HÆKKEKLIPPER

DCMHT520

Vice President of Engineering Europe

WARNING: Read all safety warnings, instructions, illustrations, and specifications in this manual, including the battery and charger sections provided in an original tool manual or the separate Batteries and Chargers manual. Manuals can be obtained by contacting

Customer Service (refer to the back page of this manual).

Technical Data

	DCMHT520
Voltage V	DC	18
Type 1
Battery type Li-lon
Blade strokes (no load) min	-1	1350
Blade length mm 203
Blade gap mm 8
Blade strokes per minute 2700
Blade break time s <1
Weight (without battery pack) kg 1.38
Noise values and/or vibration values (triax vector sum)
L_ A (emission sound pressure level)	dB(A) 76
K (uncertainty for the given sound level)	dB(A)	3.0
L_WA (sound power level)	dB(A) 84
K (uncertainty for the given sound level)	dB(A)	1.3
Vibration emission value a_h =	m/s2	2.5
Uncertainty K =	m/s2	1.5

The vibration and/or noise emission level given in this information sheet has been measured in accordance with a standardised test given in EN 62841-4-2 and may be used to compare one tool with another. It may be used for a preliminary assessment of exposure.

WARNING: The declared vibration and/or noise emission level represents the main applications of the tool. However, if the tool is used for different applications, with different accessories or is poorly maintained, the vibration and/or noise emission may differ. This may significantly increase the exposure level over the total working period. An estimation of the level of exposure to vibration and/or noise should also take into account the times when the tool is switched off or when it is running but not actually doing the job. This may significantly reduce the exposure level over the total working period.

Identify additional safety measures to protect the operator from the effects of vibration and/or noise such as: maintain the tool and the accessories, keep the hands warm (relevant for vibration), organisation of work patterns.

EC-Declaration of Conformity

MACHINERY DIRECTIVE Outdoor Noise Directive

Hedge Trimmer

DCMHT520 Type 1

We, the manufacturer as stated below, declares that these products described under Technical Data are in compliance with: 2006/42/EC, EN 62841-1:2015+A11:2022, EN 62841-4-2:2019+A1:2022+A11:2022, Level of acoustic power according to 2000/14/EC Annex V, Category Annex I: item 25.

L_WA (measured sound power level) 84 dB L_WA (guaranteed sound power) 87 dB

These products also comply with Directive 2014/30/EU and 2011/65/EU. For more information, please contact us at the following address or refer to the back of the manual.

The undersigned is responsible for compilation of the technical file and makes this declaration on behalf of the manufacturer.

Mr. Rengel Markus Rompel

Markus Rompel

Vice President of Engineering Europe Stanley Black and Decker Deutschland GmbH DEWALT, Richard-Klinger-Straße 11, 65510, Idstein, Germany 08.08.2025

Definitions: Safety Guidelines

The definitions below describe the level of severity for each signal word. Please read the manual and pay attention to these symbols.

RANGER: 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.

NOTICE: Indicates a practice not related to personal injury which, if not avoided, may result in property damage.

Denotes risk of electric shock.

A denotes risk of fire.

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

a) Keep work area clean and well lit. Cluttered or dark areas invite accidents.
b) 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.
c) Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.

2) Electrical Safety

a) 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.
b) 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.
c) Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
d) 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.
e) 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.
f) If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric shock.

3) Personal Safety

a) 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.
b) 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.
c) 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 energising power tools that have the switch on invites accidents.
d) 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.
e) Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
f) Dress properly. Do not wear loose clothing or jewellery. Keep your hair and clothing away from moving parts. Loose clothes, jewellery or long hair can be caught in moving parts.
g) 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.

h) 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

a) 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.
b) 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.

c) 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.

d) 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.

e) 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.

f) Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.

g) 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.

h) 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

a) 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.
b) Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury and fire.
c) 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.
d) 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.
e) Do not use a battery pack or tool that is damaged or modified. Damaged or modified batteries may exhibit unpredictable behaviour resulting in fire, explosion or risk of injury.

f) Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperature above 130 °C may cause explosion.
g) 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

a) 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.
b) Never service damaged battery packs. Service of battery packs should only be performed by the manufacturer or authorised service providers.

Safety Instructions for Hedge Trimmers Hedge Trimmer Safety Warnings

a) 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.
b) 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.
c) Wear ear protection. Adequate protective equipment will reduce the risk of hearing loss.
d) 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.

e) 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.

f) When clearing jammed material or servicing the hedge trimmer, make sure all power switches are off and the battery pack is removed or disconnected. Unexpected actuation of the hedge trimmer while clearing jammed material or servicing may result in serious personal injury.

g) Carry the hedge trimmer by the handle with 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.

h) When transporting or storing the hedge trimmer, always use the blade cover. Proper handling of the hedge trimmer will decrease the risk of personal injury from the blades.

Hedge Trimmer Safety Warnings

• The hedge trimmer is intended to be used by the operator at ground level and not on ladders or any other unstable support.
• Before operating the hedge trimmer, the user should make sure the locking device(s) of any moving elements are in the locked position.
• Use both hands when operating the hedge trimmer. Using one hand could cause loss of control and result in serious personal injury.
• 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 hedges and bushes for foreign objects, e.g. wire fences and hidden wiring.

RANGER: 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.

Residual Risks

In spite of the application of the relevant safety regulations and the implementation of safety devices, certain residual risks cannot be avoided. These are:

• Impairment of hearing.
• Risk of personal injury due to flying particles.
• Risk of burns due to accessories becoming hot during operation.
• Risk of personal injury due to prolonged use.

Battery Type

These battery packs may be used:

Battery(kg)Battery(kg)
DCB5461.08 DCB184/B/G0.62
DCB547/G1.46 DCB1850.35
DCB5481.46 DCB1870.54
DCB5492.12 DCB1890.54
DCB1810.35 DCBP034/G0.32
DCB1820.61 DCBP518/G0.75
DCB183/B/G0.40

Refer to the battery/charger manual for more information.

Markings on Tool

The following pictograms are shown on the tool:

Read instruction manual before use.

User must wear sufficient eye and ear protection.

Do not expose the tool to rain or high humidity or leave outdoors while it is raining.

Keep hands away from blade.

Switch the tool off. Before performing any maintenance on the tool, remove the battery from the tool.

Directive 2000/14/EC guaranteed sound power.

Date Code Position (Fig. C)

The production date code 8 consists of a 4-digit year followed by a 2-digit week and is extended by a 2-digit factory code.

Description (Fig. A)

WARNING: Never modify the power tool or any part of it.

Damage or personal injury could result.

1 On/Off trigger switch
2 Lock-off lever
3 Main handle
4 Blade
5 Battery pack ^+
6 Battery release button
7 Blade cover

^† Included in some packages.

Intended Use

The DCMHT520 hedge trimmer has been designed for professional landscaping applications.

DO NOT use under wet conditions or in the presence of flammable liquids or gases.

DO NOT let children come into contact with the tool. Supervision is required when inexperienced operators use this tool.

- This product is not intended for use by persons (including children) suffering from diminished physical, sensory or mental abilities; lack of experience, knowledge or skills unless they are supervised by a person responsible for their safety. Children should never be left alone with this product.

ASSEMBLY AND ADJUSTMENTS

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

WARNING: Use only DEWALT batteries and chargers.

Inserting and Removing the Battery Pack from the Tool (Fig. B)

NOTE: Make sure your battery pack 5 is fully charged.

To Install the Battery Pack into the Tool Handle

1. Align the battery pack with the rails inside the tool's handle (Fig. B).
2. Slide it into the handle until the battery pack is firmly seated in the tool and ensure that you hear the lock snap into place.

To Remove the Battery Pack from the Tool

1. Press the battery release button 6 and firmly pull the battery pack out of the tool handle.
2. Insert battery pack into the charger.

Fuel Gauge Battery Packs (Fig. B)

Some DEWALT battery packs include a fuel gauge which consists of three green LED lights that indicate the level of charge remaining in the battery pack.

To actuate the fuel gauge, press and hold the fuel gauge button 9. A combination of the three green LED lights will illuminate, designating the level of charge left. When the level of charge in the battery is below the usable limit, the fuel gauge will not illuminate and the battery will need to be recharged.

NOTE: The fuel gauge is only an indication of the charge left on the battery pack. It does not indicate tool functionality and is subject to variation based on product components, temperature and end-user application.

OPERATION

Instructions for Use

WARNING: Always observe the safety instructions and applicable regulations.
WARNING: To reduce the risk of serious personal injury, turn tool off and disconnect battery pack before making any adjustments or removing/installing attachments or accessories. An accidental start-up can cause injury.
WARNING: Do not store or use the tool and battery pack in locations where the temperature may fall below 4 °C (39 °F) (such as outside sheds or metal buildings in winter), or reach or exceed 40 °C (104 °F) (such as outside sheds or metal buildings in summer).

Proper Hand Position (Fig. C)

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.

WARNING: KEEP other hand away from blade.

Proper hand position requires one hand on the main handle 3.

AUTION: Blades coast after turn off.

Trigger Switch (Fig. D)

WARNING: Never attempt to lock a switch in the ON position.
CAUTION: Do not use blade to cut stems greater than 8 mm. Use the trimmer only for cutting normal shrubbery around houses and buildings.

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

2. To turn the tool OFF, release the trigger switch.

Trimming Instructions (Fig. C–G)

▲ANGER: 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. Don't overreach.
• Do not use under wet conditions.

AUTION: Blade may coast after turn off.

CAUTION: Do not use blade to cut stems greater than 8 mm. Use the trimmer only for cutting normal shrubbery around houses and buildings.

Working Position (Fig. C)

Maintain proper footing and balance and do not overreach. Wear safety goggles, non-skid footwear and gloves when trimming. Hold the tool firmly and turn the tool ON. Always hold the trimmer, as shown in Fig. C. 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

Your 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.

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

The charger and battery pack are not serviceable.

Please refer to the back page of this manual for service centre contact information, or visit www.2helpU.com.

Blade Maintenance (Fig. A, H)

The cutting blades 4 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 nick 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 5 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 5.
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.

Storage (Fig. A)

1. After use, remove the battery.
2. Keeping your hands away from the blade, slide the blade cover 7 over the blade until it snaps into place.

Lubrication

Your power tool requires no additional lubrication.

Cleaning

WARNING: Electrical shock and mechanical hazard. Disconnect the plug from the power source and/or remove the battery pack, if detachable, from the product before cleaning.

WARNING: To ensure safe and efficient operation, always keep the product and the ventilation slots (if applicable) clean. Ventilation slots can be cleaned using a dry, soft non-metallic brush and/or a suitable vacuum cleaner. Do not use water or any cleaning solutions.

WARNING: Blow dirt and dust out of the main housing with dry air as often as dirt is seen collecting in and around the ventilation slots. Wear approved eye protection and approved dust mask when performing this procedure.

WARNING: Never use solvents or other harsh chemicals for cleaning the non-metallic parts of the product. These chemicals may weaken the materials used in these parts. Use a cloth dampened only with water and mild soap. Never let any liquid get inside the product. Never immerse any part of the product into a liquid.

Optional Accessories

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

Consult your dealer for further information on the appropriate accessories.

Protecting the Environment

Products/batteries are recyclable, but if marked with the crossed-out bin, they must not be disposed of with normal household waste.

Run the batteries down completely and separate them, and separate any light sources from the product if possible. It is the user's responsibility to delete personal data from the product. Then take the waste to an official waste collection centre or a participating retailer who will often accept it free of charge. Packaging should be discarded based on the marked material code. Operating and safety instructions should only be discarded once the applicable product is no longer in use.

Please check with your local community/municipality for waste management guidance. For further information, visit www.2helpU.com and scan the above QR code.

CORTASETOS

DCMHT520

Vice President of Engineering Europe

Three black-and-white icons: a trash bin with cross symbol, a person recycling arrows, and a QR code.

Vice President of Engineering Europe

BEWAAR ALLE WAARSCHUWINGEN EN INSTRUCTIES ALS TOEKOMSTIG REFERENTIEMATERIAAL

WAARSCHUWING: Draag oogbescherming.

Three black-and-white icons: a trash bin with crossed lines, a person recycling with arrows, and a QR code.

Vice President of Engineering Europe