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Makita HM0830T Instruction manual

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ENGLISH (Original instructions)

Demolition Hammer



IMPORTANT: Read Before Using. 1

ENGLISH (Original instructions)


Model Blows per minute

HM0830 2,700 min-1

Overall length

390 mm

Net weight

4.9 kg

Safety class


· Due to our continuing programme of research and development, the specifications herein are subject to change without notice.

· Specifications may differ from country to country.

· Weight according to EPTA-Procedure 01/2003

Symbols The following show the symbols used for the equipment. Be sure that you understand their meaning before use.
 Read instruction manual.
 Only for EU countries Do not dispose of electric equipment together with household waste material! In observance of European Directive 2002/96/EC on waste electric and electronic equipment and its implementation in accordance with national law, electric equipment that have reached the end of their life must be collected separately and returned to an environmentally compatible recycling facility.
Intended use The tool is intended for chiselling work in concrete, brick, stone and asphalt as well as for driving and compacting with appropriate accessories.
Power supply The tool should be connected only to a power supply of the same voltage as indicated on the nameplate, and can only be operated on single-phase AC supply. They are double-insulated and can, therefore, also be used from sockets without earth wire.
General Power Tool Safety Warnings
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.

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. Work area safety 1. Keep work area clean and well lit. Cluttered or
dark areas invite accidents. 2. 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. 3. Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control. Electrical safety 4. 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. 5. 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. 6. Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock. 7. 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. 8. 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. 9. 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. 10. Use of power supply via a RCD with a rated
residual current of 30mA or less is always recommended. Personal safety 11. 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. 12. Use personal protective equipment. Always wear eye protection. Protective equipment such as dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries. 13. 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. 14. 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. 15. Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations. 16. Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewellery or long hair can be caught in moving parts. 17. 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 18. 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. 19. 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. 20. 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.

21. 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.
22. 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.
23. Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
24. 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.
Service 25. 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. 26. Follow instruction for lubricating and changing accessories. 27. Keep handles dry, clean and free from oil and grease.
1. Wear ear protectors. Exposure to noise can cause hearing loss.
2. Use auxiliary handle(s), if supplied with the tool. Loss of control can cause personal injury.
3. Hold power tool by insulated gripping surfaces, when performing an operation where the cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a "live" wire may make exposed metal parts of the power tool "live" and could give the operator an electric shock.
4. Wear a hard hat (safety helmet), safety glasses and/or face shield. Ordinary eye or sun glasses are NOT safety glasses. It is also highly recommended that you wear a dust mask and thickly padded gloves.
5. Be sure the bit is secured in place before operation.
6. Under normal operation, the tool is designed to produce vibration. The screws can come loose easily, causing a breakdown or accident. Check tightness of screws carefully before operation.


7. In cold weather or when the tool has not been used for a long time, let the tool warm up for a while by operating it under no load. This will loosen up the lubrication. Without proper warm-up, hammering operation is difficult.
8. Always be sure you have a firm footing. Be sure no one is below when using the tool in high locations.
9. Hold the tool firmly with both hands. 10. Keep hands away from moving parts. 11. Do not leave the tool running. Operate the tool
only when hand-held. 12. Do not point the tool at any one in the area
when operating. The bit could fly out and injure someone seriously. 13. Do not touch the bit or parts close to the bit immediately after operation; they may be extremely hot and could burn your skin. 14. Do not operate the tool at no-load unnecessarily. 15. Some material contains chemicals which may be toxic. Take caution to prevent dust inhalation and skin contact. Follow material supplier safety data.
WARNING: DO NOT let comfort or familiarity with product (gained from repeated use) replace strict adherence to safety rules for the subject product. MISUSE or failure to follow the safety rules stated in this instruction manual may cause serious personal injury.

CAUTION: · Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the tool. Switch action
1. Switch trigger 2. Lock button



CAUTION: · Before plugging in the tool, always check to see
that the switch trigger actuates properly and returns to the "OFF" position when released. To start the tool, simply pull the switch trigger. Release the switch trigger to stop. For continuous operation, pull the switch trigger and then push in the lock button. To stop the tool from the locked position, pull the switch trigger fully, then release it.


CAUTION: · Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool. Installing side grip (auxiliary handle)
1. Side grip 1

The side grip swings around to either side, allowing easy handling of the tool in any position. Loosen the side grip by turning it counterclockwise, swing it to the desired position and then tighten it by turning clockwise.

Installing or removing the bit

1. Tool retainer


2. Push button


Replacing carbon brushes 2

1. Commutator 2. Insulating tip 3. Carbon brush


Press the push button and pivot the tool retainer to the side. Insert the bit into the tool barrel as far as it will go. Return the tool retainer to its original position to secure the bit. To remove the bit, follow the installation procedure in reverse.

CAUTION: · When the push button does not move freely even if
pressed, remove dust from the dust hole by using a wire or similars. Apply machine oil at your hand and push the push button two or three times for smoother motion.



1. Hole

2. Push button

3. Tool retainer

Chipping/Scaling/Demolition Always hold the tool firmly with one hand on the side grip and other hand on the main handle.Turn the tool on and apply slight pressure on the tool so that the tool will not bounce around, uncontrolled. Pressing very hard on the tool will not increase the efficiency.
CAUTION: · Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or maintenance. · Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result.

When the resin insulating tip inside the carbon brush is exposed to contact the commutator, it will automatically shut off the motor. When this occurs, both carbon brushes should be replaced. Keep the carbon brushes clean and free to slip in the holders. Both carbon brushes should be replaced at the same time. Use only identical carbon brushes. Use a screwdriver to remove the rear cover.
1. Rear cover 2. Screwdriver

1 2
Use a screwdriver to remove the brush holder caps. Take out the worn carbon brushes, insert the new ones and secure the brush holder caps.


1. Screwdriver

2 2. Brush holder cap

Reinstall the rear cover firmly. Lubrication
2 1

1. Hex wrench 2. Hex bolts



This tool requires no hourly or daily lubrication because it has a grease-packed lubrication system. It should be relubricated after every 6 months of operation. Send the complete tool to Makita Authorized Service Center for this lubrication service. However, if circumstances require that you should lubricate it by yourself, proceed as follows. Run the tool for several minutes to warm it up. Switch off and unplug the tool. Remove the crank cap by loosening hex bolts (3 pcs.) securing it with a hex wrench. Rest the tool on the table with the bit end pointing upwards. This will allow the old grease to collect inside the crank housing. Wipe out the old grease inside and replace with a fresh grease (30 g). Use only Makita genuine hammer grease (optional accessory). Filling with more than the specified amount of grease (approx. 30 g) can cause faulty hammering action or tool failure. Fill only with the specified amount of grease.


1. Grease

· Bit grease · Lock nut wrench 35 · Hex wrench · Safety goggles · Hammer grease · Plastic carrying case
NOTE: · Some items in the list may be included in the tool
package as standard accessories. They may differ from country to country.

Reinstall the crank cap and tighten hex bolts firmly with the hex wrench. To maintain product SAFETY and RELIABILITY, repairs, any other maintenance or adjustment should be performed by Makita Authorized Service Centers, always using Makita replacement parts.
CAUTION: · These accessories or attachments are
recommended for use with your Makita tool specified in this manual. The use of any other accessories or attachments might present a risk of injury to persons. Only use accessory or attachment for its stated purpose. If you need any assistance for more details regarding these accessories, ask your local Makita Service Center. · Bull point · Cold chisel · Scaling chisel · Clay spade · Grooving chisel · Rammer · Bushing tool · Ground rod adapter



Makita Corporation
Anjo, Aichi, Japan

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