HIKOKI DH 18DPA Cordless Rotary Hammer Instructions

: June 3, 2024
: HiKOKI

Table of Contents

HIKOKI DH 18DPA Cordless Rotary Hammer
GENERAL POWER TOOL SAFETY WARNINGS
PRECAUTIONS FOR BATTERY AND CHARGER
- CAUTION ON LITHIUM-ION BATTERY
NAME OF PARTS
SPECIFICATIONS
STANDARD ACCESSORIES
APPLICATIONS
BATTERY REMOVAL/INSTALLATION
CHARGING
PRIOR TO OPERATION
HOW TO USE
HOW TO USE THE CORE BIT (FOR LIGHT LOAD)
REACTIVE FORCE CONTROL
MAINTENANCE AND INSPECTION
TROUBLESHOOTING
SELECTING ACCESSORIES
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HIKOKI DH 18DPA Cordless Rotary Hammer

HIKOKI-DH-18DPA-Cordless-Rotary-Hammer-product

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, ﬁ re 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
- 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 ﬂ ammable liquids, gases or dust. Power tools create sparks that may ignite the dust or fumes.
- 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 residual current device (RCD) protected supply.
  Use of an RCD 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 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 position before connecting to a 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.
- 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 jewellery. Keep your hair, clothing and gloves away from moving parts.
  Loose clothes, jewellery 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.
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 aﬀ ect the power toolʼs 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 diﬀ erent from those intended could result in a hazardous situation.
Battery tool use and care
- Recharge only with the charger speciﬁ ed by the manufacturer.
  A charger that is suitable for one type of battery pack may create a risk of ﬁ re when used with another battery pack.
- Use power tools only with speciﬁ cally designated battery packs.
  Use of any other battery packs may create a risk of injury and ﬁ re.
- 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 ﬁ re.
- Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, ﬂ ush 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 qualiﬁ ed repair person using only identical replacement parts.
  This will ensure that the safety of the power tool is maintained.

CAUTION

Keep children and infirm persons away.
When not in use, tools should be stored out of reach of children and infirm persons.

CORDLESS ROTARY HAMMER SAFETY WARNINGS

Wear ear protectors.
Exposure to noise can cause hearing loss.
Use auxiliary handle(s), if supplied with the tool.
Loss of control can cause personal injury.
Hold power tool by insulated gripping surfaces, when performing an operation where the cutting accessory may contact hidden wiring. Cutting accessory contacting a live wire may make exposed metal parts of the power tool live and could give the operator an electric shock.

ADDITIONAL SAFETY WARNINGS

When using this unit continuously, the unit may overheat, leading to damage in the motor and switch. Please leave it without using it for approximately 15 minutes.
Before starting to break, chip or drill into a wall, ï¬‚ oor or ceiling, thoroughly confirm that such items as electric cables or conduits are not buried inside.
Ensure that the power switch is in the OFF position. If the battery is installed while the power switch is in the ON position, the power tool will start operating immediately, which could cause a serious accident.
Do not touch the bit during or immediately after operation. The bit becomes very hot during operation and could cause serious burns.
Always hold the body handle and side handle of the power tool firmly. Otherwise the counterforce produced may result in inaccurate and even dangerous operation.
Wear a dust mask
Do not inhale the harmful dusts generated in drilling or chiseling operation. The dust can endanger the health of yourself and bystanders.
Make sure that the battery is installed firmly. If it is at all loose it could come off and cause an accident.
To prevent accidents, make sure to turn the switch off and pull out the battery before changing accessories, storing, carrying or when not using the tools.
Mounting the drill bit
- To prevent accidents, make sure to turn the switch oﬀ and pull out the battery.
- When using tools such as bull points, drill bits, etc., make sure to use the genuine parts designated by our company.
- Clean the shank portion of the drill bit.
- Check the latching by pulling on the drill bit. change lever while the motor is running may cause the tip tool to unexpectedly rotate and result in an accident.
Rotation + hammering
When the drill bit touches construction iron bar, the bit will stop immediately and the rotary hammer will react to revolve. Therefore ﬁ rmly tighten the side handle, hold the body handle and side handles.
Rotation only
- To drill wood or metal material using the drill chuck and chuck adapter (optional accessories).
- Application of force more than necessary will not only expedite the work, but will deteriorate the tip edge of the drill bit and reduce the service life of the rotary hammer in addition.
- Drill bits may snap oﬀ while withdrawing the rotary hammer from the drilled hole. For withdrawing, it is important to use a pushing motion.
- Do not attempt to drill anchor holes or holes in concrete with the machine set in the rotation-only function.
- Do not attempt to use the rotary hammer in the rotation and striking mode with the drill chuck and chuck adapter attached. This would seriously shorten the service life of every component of the machine.
Do not look directly into the light. Such actions could result in eye injury. Wipe oï¬€ any dirt or grime attached to the lens of the LED light with a soft cloth, being careful not to scratch the lens.
Scratches on the lens of the LED light can result in decreased brightness. The LED light will not light up when installing the dust extraction unit.
Do not use the product if the tool or the battery terminals (battery mount) are deformed.
Installing the battery could cause a short circuit that could result in smoke emission or ignition.
Keep the tool terminals (battery mount) free of swarf and dust.
- Prior to use, make sure that swarf and dust have not collected in the area of the terminals.
- During use, try to avoid swarf or dust on the tool from falling on the battery.
- When suspending operation or after use, do not leave the tool in an area where it may be exposed to falling swarf or dust. Doing so could cause a short circuit that could result in smoke emission or ignition.

PRECAUTIONS FOR BATTERY AND CHARGER

Always charge the battery at an ambient temperature of 0–40°C. A temperature of less than 0°C will result in over charging which is dangerous. The battery cannot be charged at a temperature greater than 40°C.
The most suitable temperature for charging is that of 20–25°C.
Do not use the charger continuously.
When one charging is completed, leave the charger for about 15 minutes before the next charging of battery.
Do not allow foreign matter to enter the hole for connecting the rechargeable battery.
Never disassemble the rechargeable battery or charger.
Never short-circuit the rechargeable battery.
Short-circuiting the battery will cause a great electric current and overheat. It results in burn or damage to the battery.
Do not dispose of the battery in ﬁ re.
If the battery is burnt, it may explode.
Using an exhausted battery will damage the charger.
Bring the battery to the shop from which it was purchased as soon as the post-charging battery life becomes too short for practical use. Do not dispose of the exhausted battery.
Do not insert objects into the air ventilation slots of the charger.
Inserting metal objects or ﬂammable into the charger air ventilation slots will result in an electrical shock hazard or damage to the charger.

CAUTION ON LITHIUM-ION BATTERY

To extend its lifetime, the lithium-ion battery equips with a protection function to stop the output. In the cases of 1 to 3 described below, when using this product, even if you are pulling the switch, the motor may stop. This is not the trouble but the result of the protection function.

When the battery power remaining runs out, the motor stops.
In such case, charge it up immediately.
If the tool is overloaded, the motor may stop. In this case, release the switch of tool and eliminate causes of overloading. After that, you can use it again.
If the battery is overheated under overload work, the battery power may stop.
In this case, stop using the battery and let the battery cool. After that, you can use it again.

Furthermore, please heed the following warning and caution.

WARNING
In order to prevent any battery leakage, heat generation, smoke emission, explosion, and ignition beforehand, please be sure to heed the following precautions.

Make sure that the swarf and dust do not collect on the battery.
- During work make sure that swarf and dust do not fall on the battery.
- Make sure that any swarf and dust falling on the power tool during work do not collect on the battery.
- Do not store an unused battery in a location exposed to swarf and dust.
- Before storing a battery, remove any swarf and dust that may adhere to it and do not store it together with metal parts (screws, nails, etc.).
Do not pierce battery with a sharp object such as a nail, strike with a hammer, step on, throw or subject the battery to severe physical shock.
Do not use an apparently damaged or deformed battery.
Do not use the battery for a purpose other than those speciﬁed.
If the battery charging fails to complete even when a speciﬁ ed recharging time has elapsed, immediately stop further recharging.
Do not put or subject the battery to high temperatures or high pressure such as into a microwave oven, dryer, or high-pressure container.
Keep away from ﬁ re immediately when leakage or foul odor are detected.
Do not use in a location where strong static electricity generates.
If there is battery leakage, foul odor, heat generated, discolored or deformed, or in any way appears abnormal during use, recharging or storage, immediately remove it from the equipment or battery charger, and stop use.
Do not immerse the battery or allow any ﬂ ids to ﬂow inside. Conductive liquid ingress, such as water, can cause damage resulting in ﬁ re or explosion. Store your battery in a cool, dry place, away from combustible and ﬂammable items. Corrosive gas atmospheres must be avoided.

CAUTION

If liquid leaking from the battery gets into your eyes, do not rub your eyes and wash them well with fresh clean water such as tap water and contact a doctor immediately. If left untreated, the liquid may cause eye problems.
If liquid leaks onto your skin or clothes, wash well with clean water such as tap water immediately.
There is a possibility that this can cause skin irritation.
If you ﬁ nd rust, foul odor, overheating, discolor, deformation, and/or other irregularities when using the battery for the ﬁ rst time, do not use and return it to your supplier or vendor.

WARNING
If an electrically conductive foreign object enters the terminals of the lithium ion battery, a short-circuit may occur resulting in the risk of ï¬ re. Please observe the following matters when storing the battery.

Do not place electrically conductive cuttings, nails, steel wire, copper wire or other wire in the storage case.
Either install the battery in the power tool or store by securely pressing into the battery cover until the ventilation holes are concealed to prevent short-circuits (See Fig. 1). $HIKOKI-DH-18DPA-Cordless-Rotary-Hammer-fig- $1$$

REGARDING LITHIUM-ION BATTERY TRANSPORTATION
When transporting a lithium-ion battery, please observe the following precautions.

WARNING
Notify the transporting company that a package contains a lithium-ion battery, inform the company of its power output and follow the instructions of the transportation company when arranging transport.

Lithium-ion batteries that exceed a power output of 100 Wh are considered to be in the freight classiﬁ cation of Dangerous Goods and will require special application procedures.
For transportation abroad, you must comply with international law and the rules and regulations of the destination country.

SYMBOL

WARNING
The following show symbols used for the machine. Be sure that you understand their meaning before use.

To reduce the risk of injury, user must read the instruction manual.
Direct current
Rated voltage
No-load speed
Oscillation per minute
Warning

NAME OF PARTS

POWER TOOL

$HIKOKI-DH-18DPA-Cordless-Rotary-Hammer-fig- $4$$

Battery (Sold separately)

Battery Charger (Sold separately)

SPECIFICATIONS

POWER TOOL

Model	DH18DPA
Voltage	18 V
No-load speed	0–1080 /min
Full-load impact rate	0–5500 /min

Capacity

Depending on attached battery. The heaviest weight is measured with BSL36B18 (sold separately).

Charger (sold separately)

Model	UC18YFSL
Charging voltage	14.4 V–18 V
Weight	0.5 kg

STANDARD ACCESSORIES

In addition to the main unit (1 unit), the package contains the accessories listed in below. $HIKOKI-DH-18DPA-Cordless-Rotary-Hammer-fig- $7$$

APPLICATIONS

Rotation and hammering function

Drilling anchor holes
Drilling holes in concrete
Drilling holes in tile

Rotation only function

Drilling in steel or wood (with optional accessories)
Tightening machine screws, wood screws (with optional accessories)

BATTERY REMOVAL/INSTALLATION

Battery removal
Hold the handle tightly and push the battery latches to remove the battery (Fig. 6).
CAUTION
Never short-circuit the battery.
Battery installation
Align the battery with the groove in tool handle and slip it into place. Always insert it all the way until it locks in place with a little click, If not, it may accidentally fall out of the tool, causing injury to you or someone around you (see Fig. 6).

CHARGING

Before using the power tool, charge the battery as follows.

Connect the charger’s power cord to the receptacle. When connecting the plug of the charger to a receptacle, the pilot lamp will blink in red (At 1- second intervals).
Insert the battery into the charger.
Firmly insert the battery into the charger as shown in Fig. 7.
Charging
When inserting a battery in the charger, charging will commence and the pilot lamp will light continuously in red.
When the battery becomes fully recharged, the pilot lamp will blink in red. (At 1-second intervals) (See Table 2)
- Pilot lamp indication
  The indications of the pilot lamp will be as shown in Table 2, according to the condition of the charger or the rechargeable battery. $HIKOKI-DH-18DPA- Cordless-Rotary-Hammer-fig- $10$$

Regarding the temperatures and charging time of the battery.
The temperatures and charging time will become as shown in Table 3.

Battery Charger| UC18YFSL
---|---
Charging voltage| V| 14.4–18
Weight| kg| 0.5
Temperatures at which the battery can be recharged| 0°C–50°C
Charging time for battery capacity, approx. (At 20°C)| 22
1.5 Ah| min
2.0 Ah| min| 30
2.5 Ah| min| 35
3.0 Ah| min| 45
4.0 Ah| min| 60
5.0 Ah| min| 75
6.0 Ah| min| 90
8.0 Ah| min| 120
Number of battery cells| 4–10

NOTE
The recharging time may vary according to the ambient temperature and power source voltage.

Disconnect the charger’s power cord from the receptacle. Hold the charger ﬁ rmly and pull out the battery.

NOTE
Be sure to pull out the battery from the charger after use, and then keep it.

Regarding electric discharge in case of new batteries, etc.
As the internal chemical substance of new batteries and batteries that have not been used for an extended period is not activated, the electric discharge might be low when using them the ﬁ rst and second time. This is a temporary phenomenon, and normal time required for recharging will be restored by recharging the batteries 2–3 times.

How to make the batteries perform longer

Recharge the batteries before they become completely exhausted.
When you feel that the power of the tool becomes weaker, stop using the tool and recharge its battery. If you continue to use the tool and exhaust the electric current, the battery may be damaged and its life will become shorter.
Avoid recharging at high temperatures.
A rechargeable battery will be hot immediately after use. If such a battery is recharged immediately after use, its internal chemical substance will deteriorate, and the battery life will be shortened. Leave the battery and recharge it after it has cooled for a while.

CAUTION

If the battery is charged while it is heated because it has been left for a long time in a location subject to direct sunlight or because the battery has just been used, the pilot lamp of the charger lights for 1 second, does not light for 0.5 seconds (oﬀ for 0.5 seconds). In such a case, ﬁ rst let the battery cool, then start charging.
When the pilot lamp ﬂ ickers (at 0.2-second intervals), check for and take out any foreign objects in the charger’s battery connector. If there are no foreign objects, it is probable that the battery or charger is malfunctioning. Take it to your authorized Service Center.
Since the built-in microcomputer takes about 3 seconds to conﬁ rm that the battery being charged with charger is taken out, wait for a minimum of 3 seconds before reinserting it to continue charging. If the battery is reinserted within 3 seconds, the battery may not be properly charged.
If the pilot lamp does not blink in red (every second) even though the charger cord is connected to the power, it indicates that the protection circuit of the charger may be activated.
Remove the cord or plug from the power and then connect it again after
30 seconds or so. If this does not cause the pilot lamp to blink in red (every second), please take the charger to the HiKOKI Authorized Service Center.

PRIOR TO OPERATION

WARNING
To prevent accidents, make sure to turn the switch oﬀ and disconnect the battery when the drill bits and other various parts are installed or removed. The power switch should also be turned oﬀ during a work break and after work.

Power switch
Ensure that the power switch is in the OFF position. If the battery is inserted while the power switch is in the ON position, the power tool will start operating immediately, which could cause a serious accident.
Conﬁrming condition of the environment
Conﬁrm that the work site is placed under appropriate conditions conforming to prescribed precautions.
Attaching the side handle (Fig. 8)
Turn the grip of the side handle to loosen it and push it in until it comes in contact with the housing.
Adjust the side handle to the angle that allows the easiest use, then turn the side handle’s grip ﬁrmly to lock it place.
Installing the drill bit (SDS-plus shank)

CAUTION
For tools such as a drill bit and a bull point, use only HiKOKI genuine parts.

Clean, then smear the drill bit shank with grease or machine oil.
To attach the drill bit (SDS-plus shank), insert it into the hole until it contacts the innermost end of the hole as illustrated in Fig. 9.
Turn the drill bit while gently pressing it in, and the groove of the drill bit will catch, allowing the drill bit to enter more deeply until it is inserted all the way.
Pull the drill bit to make sure it is locked completely.
To remove the drill bit, fully pull the grip in the direction of the arrow and pull out the drill bit (Fig. 10).
Selecting the driver bit
Screw heads or bits will be damaged unless a bit appropriate for the screw diameter is employed to drive in the screws.
Confirm the direction of bit rotation (Fig. 11)
The bit rotates clockwise (viewed from the rear side) by pushing the R-side of the push button. The L-side of the push button is pushed to turn the bit counterclockwise.
CAUTION
The push button cannot be switched while the power tool is turning. To switch the push button, stop the power tool, then set the push button.
Select operation mode
The number of rotations and the number of blows switches between two stages when the changeover switch is pressed. (Fig. 12)
NOTE
The changeover switch will not operate if pressed while the motor is rotating. $HIKOKI-DH-18DPA-Cordless-Rotary-Hammer-fig- $16$$
Auto stop function
This product is equipped with an auto-stop function to support continuous drilling work. The function features a memory mode for storing the work time for drilling from switch ON to switch OFF, and an auto stop mode that automatically stops the motor from the second drilling onward should the work exceed the stored work time while the switch is ON.
Select the number of rotations or the number of blows with the changeover switch.
Pressing the changeover switch for longer than two seconds will move to memory mode. (At the same time the auto stop lamp will blink.) (Fig. 13)
Conduct drilling when the auto-stop lamp is ﬂ ashing. The time between switching ON and switching OFF is stored by the tool. (After it is stored, the auto stop lamp will light up.)(Fig. 14) $HIKOKI-DH-18DPA-Cordless-Rotary-Hammer-fig- $18$$
Continuous drilling is possible as the memory storage time will be recorded by the tool until the auto-stop mode is canceled.
The auto-stop function is canceled by pressing the changeover switch once again for over two seconds. (At the same time, the auto stop lamp will turn oﬀ .)
CAUTION

  * Switch ON the tool once you place the tip of the tool on the work material.
  * The rotation speed and the level at which the switch trigger is pulled during drilling is not stored to memory.
  * Fully carry out drilling in one go during the auto-stop mode.
  * The motor will stop even if you switch it OFF within the memory storage time.
  * When you switch OFF within the memory storage time, the count will be reset. If you rework a task in which a hole has been partially drilled, the memory storage time will be fully recounted.
  * The auto-stop function will remain active until canceled.

About the protection function
This tool has a built-in protection circuit for preventing damage to the unit in the event of an abnormality. Depending on the following, the display lamp and the indicator lamp will ﬂ ash, and the unit will cease to operate. Verify the problem indicated by the ﬂ ashing and take the necessary steps to correct the problem.
(Fig.15, Table 5 on page 48) When pressing the changeover switch, do so when the switch trigger is not being pulled.Display lamp

flashing

| Cause| Solution
---|---|---
****| Operation has ceased because the internal temperature has exceeded the temperature limit.

(High-temperature protection function)

| Allow the unit to cool for 15 to 30 minutes.

When the temperature goes down and the display lamp and the indicator lamp blinking stops, pull the switch trigger to recover operation.

****| Sudden overburdening of the tool bit has activated the RFC, stopping further operation of the tool.

RFC (See “REACTIVE FORCE

CONTROL” on page 55)

| Release the switch trigger and leave it until the display lamp blinking stops. Pull the switch trigger again to recover operation.

Before continuing operation, remove the cause of the overburden.

NOTE
Despite taking steps to correct a problem, the display lamp may continue to blink. Should this be the case, the unit may require repair. If so, please contact the outlet from which this product was purchased for repairs.

Remaining battery indicator (Battery)
You can check the battery remaining capacity by pressing the remaining battery indicator switch to light the indicator lamp. (Fig. 16, Table 6 on page 49). The indicator will shut oï¬€ approximately 3 seconds after the remaining battery indicator switch is pressed. It is best to use the remaining battery indicator as a guide since there are slight diffierences such as ambient temperature and the condition of the battery. Also, the remaining battery indicator may vary from those equipped to a tool or charger.
As the remaining battery indicator shows somewhat diﬀ erently depending on ambient temperature and battery characteristics, read it as a reference . $HIKOKI-DH-18DPA-Cordless-Rotary-Hammer-fig- $23$$
Remaining battery indicator (Main Unit) During use, the indicator lamp will light when the remaining power of the battery is low. (Fig. 17) NOTE
Do not give a strong shock to the switch panel or break it. It may lead to trouble.
How to use the LED light
While the switch trigger is pulled, the LED light will automatically light up the tip portion of the tool. (Fig. 18) The LED light will automatically turn oﬀ 10 seconds after the switch trigger is released.

HOW TO USE

WARNING
To prevent accidents, make sure to turn the switch oﬀ and remove the battery when the drill bits and other various parts are installed or removed. The power switch should also be turned oﬀ during a work break and after work.

CAUTION
To extend its lifetime, the lithium-ion battery equips with a protection function to stop the output. Therefore, if the tool is overloaded, the motor may stop. However, this is not the trouble but the result of the protection function. In this case, release the switch of the tool and eliminate the causes of overloading.

Switch operation
- When the switch trigger is depressed, the tool rotates. When the switch trigger is released, the tool stops.
- The rotational speed of the rotary hammer can be controlled by varying the amount that the switch trigger is pulled. Speed is low when the switch trigger is pulled slightly and increases as the switch trigger is pulled more.
- When releasing the switch trigger, the brake will be applied for immediate stopping.
Rotation + hammering
This rotary hammer can be set to rotation and hammering mode by turning the change lever until it stops at the mark (Fig. 19)
Install the drill bit.
Pull the switch trigger after applying the drill bit tip to the drilling position. (Fig. 20)
Pushing the rotary hammer forcibly is not necessary at all. Pushing slightly so that drill dust comes out gradually is just suﬃcient.
CAUTION
When the drill bit touches the construction iron bar, the bit will stop immediately and the rotary hammer will react to revolve. Therefore please grip the side handle and handle tightly as shown in Fig. 20.
Rotation only
This rotary hammer can be set to the rotation-only mode by turning the change lever until it stops at the mark (Fig. 21). To drill wood or metal material using the drill chuck and chuck adapter (sold separately), proceed as follows.
Installing drill chuck and chuck adapter. (Fig. 22)
Attach the drill chuck to the chuck adaptor.
The part of the SDS-plus shank is the same as the drill bit. Therefore, refer to the item of â€œInstalling the drill bit (on page 45) for attaching it.
CAUTION

  * Application of force more than necessary will not only expedite the work but will deteriorate the tip edge of the drill bit and reduce the service life of the rotary hammer in addition.
  * Drill bits may snap oﬀ while withdrawing the rotary hammer from the drilled hole. For withdrawing, it is important to use a pushing motion.
  * Do not attempt to drill anchor holes or holes in concrete with the machine set in the rotation-only function.
  * Do not attempt to use the rotary hammer in the rotation and striking function with the drill chuck and chuck adapter attached. This would seriously shorten the service life of every component of the machine.

When driving machine screws (Fig. 23)
First, insert the bit into the socket in the end of chuck adapter (D). Next, mount chuck adapter (D) on the main unit using procedures described in 4 (1), (2), (3) (on page 45), put the tip of the bit in the slots in the head of the screw, grasp the main unit and tighten the screw. $HIKOKI-DH-18DPA-Cordless- Rotary-Hammer-fig- $30$$
CAUTION
- Exercise care not to excessively prolong driving time, otherwise, the screws may be damaged by excessive force.
- Apply the rotary hammer perpendicularly to the screw head when driving the screw; otherwise, the screw head or bit will be damaged, or driving force will not be fully transferred to the screw.
- Do not attempt to use the rotary hammer in the rotation and striking function with the chuck adapter and bit attached.
When driving wood screws (Fig. 23)
Selecting a suitable driver bit
Employ plus-head screws, if possible, since the driver bit easily slips oﬀ the heads of minus-head screws.
Driving in wood screws.

  * Prior to driving in wood screws, make pilot holes suitable for them in the wooden board. Apply the bit to the screw head grooves and gently drive the screws into the holes.
  * After rotating the rotary hammer at low speed for a while until the wood screw is partly driven into the wood, squeeze the trigger more strongly to obtain the optimum driving force.

CAUTION
Exercise care in preparing a pilot hole suitable for the wood screw taking the hardness of the wood into consideration. Should the hole be excessively small or shallow, requiring much power to drive the screw into it, the thread of the wood screw may sometimes be damaged.

Using depth gauge (Fig. 24)
Loosen the knob on the side handle, and insert the depth gauge into the mounting hole on the side handle.
Adjust the depth gauge position according to the depth of the hole and tighten the knob securely.
How to use the drill bit (taper shank) and the taper shank adapter (sold separately)
Mount the taper shank adapter to the rotary hammer. (Fig. 25)
Mount the drill bit (taper shank) to the taper shank adapter. (Fig. 25)
Turn the switch ON, and drill a hole in the prescribed depth.
To remove the drill bit (taper shank), insert the cotter into the slot of the taper shank adapter and strike the head of the cotter with a hammer supporting on the rests. (Fig. 26) $HIKOKI-DH-18DPA-Cordless-Rotary-Hammer-fig- $32$$
CAUTION
A drill can snap sometimes when drilling is almost ﬁnished. It is important to relax your thrusting pressure when drilling is nearing the end.
Installation of dust cup or dust collector (B) (Optional accessories) When using a rotary hammer for upward drilling operations attach a dust cup or a dust collector (B) to collect dust or particles for easy operation.
- Installing the dust cup
  Use the dust cup by attaching to the drill bit as shown in Fig. 27. When using a bit that has a big diameter, enlarge the center hole of the dust cup with this rotary hammer.
- Installing dust collector (B)
  When using dust collector (B), insert dust collector (B) from the tip of the bit by aligning it to the groove on the grip. (Fig. 28).
  CAUTION
- The dust cup and dust collector (B) are for the exclusive use of concrete drilling work. Do not use them for wood or metal drilling work. Insert dust collector (B) completely into the chuck part of the main unit.
  When turning the rotary hammer on while dust collector (B) is detached from a concrete surface, the dust collector
  (B) will rotate together with the drill bit. Make sure to turn on the switch after pressing the dust cup on the concrete surface. When using a dust collector (B) attached to a drill bit that has more than 190 mm of overall length, dust collector (B) cannot touch the concrete surface and will rotate. Therefore, please use dust collector (B) by attaching to drill bits that have 166 mm, 160 mm, and 110 mm overall lengths.
- ○ Dump particles after every two or three holes when drilling.
  ○ Please replace the drill bit after removing dust collector (B).
Using the hook (sold separately)
The hook is used to hang up the power tool to your waist belt while working.
CAUTION
- When using the hook, remove the battery from the power tool.
- When using the hook, hang up the power tool ﬁ rmly not to drop accidentally.
- When carrying the power tool with hooked to your waist belt, do not ﬁt any bit to the tip of power tool. If the sharp bit such as drill is ﬁ tted to the power tool when carrying it with hooked to your waist belt, you will be injured.
- Install securely the hook. Unless the hook is securely installed, it may cause an injury while using. Install securely the hook in the groove of power tool and tighten the screws to ﬁ x the hook ﬁ rmly. (Fig. 29)

HOW TO USE THE CORE BIT (FOR LIGHT LOAD)

(sold separately)

When boring penetrating large holes use the core bit (for light loads). At that time use with the center pin and the core bit shank provided as optional accessories.

Mounting
WARNING
To prevent accidents, make sure to turn the switch oﬀ and disconnect the battery.
Mount the core bit to the core bit shank (Fig. 30).
Lubricate the thread of the core bit shank to facilitate disassembly.
Mount the core bit to the rotary hammer (Fig. 31).
Insert the center pin into the guide plate until it stops.
Engage the guide plate with the core bit, and turn the guide plate to the left or the right so that it does not fall even if it faces downward (Fig. 32).
How to bore (Fig. 33)
- Install the battery.
- A spring is installed in the center pin.
  Push it lightly to the wall or the ﬂ oor straight. Connect the core bit tip ﬂush to the surface and start operating.
- When boring about 5 mm in depth the position of the hole will be established. Bore after that removing the center pin and the guide plate from core bit.
  WARNING
- When removing the center pin and the guide plate, turn OFF the switch and disconnect the battery.
  CAUTION
- Application of excessive force will not only expedite the work, but will deteriorate the tip edge of the drill bit, resulting in reduced service life of the rotary hammer.
Dismounting (Fig. 34)
Remove the core bit shank from the rotary hammer and strike the head of the core bit shank strongly two or three times with a hammer holding the core bit, then the thread becomes loose and the core bit can be removed.

OPERATIONAL CAUTIONS
Resting the unit after continuous work

The power tool is equipped with a temperature protection circuit to protect the motor. Continuous work may cause the temperature of the unit to rise, activating the temperature protection circuit and automatically stopping operation. If this happens, allow the power tool to cool before resuming use.
After use for continuous works, rest the unit for 15 minutes or so when replacing the battery. The temperature of the motor, switch, etc., will rise if the work is started again immediately after battery replacement, eventually resulting in burnout.

REACTIVE FORCE CONTROL

This product is equipped with a Reactive Force Control (RFC) feature that reduces jerking of the tool body. If the tool bit is suddenly overburdened, any jerking of the tool body is reduced by activation of the slip clutch or by stopping of the motor by the sensor built into the tool body.

If the motor is stopped because of overburdening detection by the controller, the RFC indicator lamp will blink while the switch is pulled. In addition, the lamp will continue blinking for approximately three seconds after the switch is released. The motor will remain stopped while the lamp is blinking. (Fig. 35)

Because the RFC feature may not activate or its performance may be insuﬃ cient depending on the working environment and conditions, be careful not to suddenly overburden the tool bit while operating.

Possible causes of sudden overburdening
1. Tool bit biting into the material
2. Impact against nails, metal or other hard objects
3. Tasks involving prying or any excess application of pressure, etc.
  Also, other causes include any combination of the aforementioned.
When the reactive force control (RFC) is triggered
When the RFC is triggered and the motor stops, turn oﬀ the tool’s switch and remove the cause of the overburdening before continuing operation.

MAINTENANCE AND INSPECTION

WARNING
Be sure to turned oﬀ the switch and remove the battery before maintenance and inspection.

Inspecting the tool
Since use of as dull tool will degrade e ﬃciency and cause possible motor malfunction, sharpen or replace the tool as soon as abrasion is noted.
Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, retighten them immediately. Failure to do so could result in serious hazard.
WARNING
Using this Rotary Hammer with loosen screws is extremely dangerous.
Maintenance of the motor
The motor unit winding is the very “heart” of the power tool. Exercise due care to ensure the winding does not become damaged and/or wet with oil or water.
Grease replacement
Low-viscosity grease is applied to this rotary hammer so that it can be used for a long period without replacing the grease. Please contact the nearest service center for grease replacement when any grease is leaking from the loosened screw.
Further use of the rotary hammer despite the grease shortage causes damage to reduce the service life.
CAUTION
A speciﬁc grease is used with this machine, therefore, the normal performance of the machine may be badly aﬀected by use of diﬀerent grease. Please be sure to let one of our service centers to undertake the replacement of the grease.
Inspection of terminals (tool and battery)
Check to make sure that swarf and dust have not collected on the terminals. On occasion check prior, during and after operation.
CAUTION
Remove any swarf or dust which may have collected on the terminals. Failure to do so may result in malfunction.
Cleaning on the outside
When the power tool is stained, wipe with a soft dry cloth or a cloth moistened with soapy water. Do not use chloric solvents, gasoline or paint thinner, for they melt plastics.
Cleaning of the battery installation compartment
After drilling concrete, if concrete dust has accumulated on the terminals or the area where the battery slides within the battery installation compartment, clean off the accumulated concrete dust with a dry cloth before using the tool. (Fig. 36) Also, after cleaning, ensure that the battery can be installed and removed smoothly from the tool.
CAUTION
Using the tool when the battery is covered with concrete dust may lead toaccidents such as the battery falling during use. Furthermore, such use may cause a malfunction or contact failure between the battery and the terminals.
Disposal of the exhausted battery
WARNING
Do not dispose of the exhausted battery. The battery must explode if it is incinerated. The product that you have purchased contains a rechargeable battery. The battery is recyclable. At the end of it’s useful life, under various state and local laws, it may be illegal to dispose of this battery into the municipal waste stream. Check with your local solid waste offi cials for details in your area for recycling options or proper disposal.
Storage
Store the power tool in a place in which the temperature is less than 40°C and out of reach of children.

NOTE

Storing lithium-ion batteries
Make sure the lithium-ion batteries have been fully charged before storing them. Prolonged storage (3 months or more) of batteries with a low charge may result in performance deterioration, significantly reducing battery usage time or rendering the batteries incapable of holding a charge. However, significantly reduced battery usage time may be recovered by repeatedly charging and using the batteries two to five times.

If the battery usage time is extremely short despite repeated charging and use, consider the batteries dead and purchase new batteries.

CAUTION
In the operation and maintenance of power tools, the safety regulations and standards prescribed in each country must be observed.

Important notice on the batteries for the HiKOKI cordless power tools
Please always use one of our designated genuine batteries. We cannot guarantee the safety and performance of our cordless power tool when used with batteries other than those designated by us, or when the battery is disassembled and modified (such as disassembly and replacement of cells or other internal parts).

TROUBLESHOOTING

Use the inspections in the table below if the tool does not operate normally. If this does not remedy the problem, consult your dealer or the HiKOKI Authorized Service Center.

Power tool

Symptom	Possible cause	Remedy
Tool doesn’t run	No remaining battery power	Charge the battery.
Battery isn’t securely attached.	Push in the battery until a click is heard.

Concrete dust has accumulated on the terminals of the battery

installation compartment as well as on the battery sliding grooves.

| Clean oﬀ the accumulated concrete dust with a dry cloth.
Tool suddenly stopped| Tool was overburdened| Get rid of the problem causing the overburden.
Reactive force control was activated
The battery is overheated.| Let the battery cool down.
Tool bits

-can’t be attached

-fall oﬀ

| The shape of the attachment portion doesn’t match| For the SDS-plus shank type, use a bit with a diameter that is within the designated range.
Holes can’t be smoothly drilled.| The drill is worn| Replace with a new drill.
The drill is rotating in reverse| Switch to forward rotation.
Screw head slips or comes loose.| Bit number doesn’t match with the screw size| Install a suitable bit.
The bit is worn| Replace with a new bit.
Battery cannot be installed| Attempting to install a battery other than that specified for the tool.| Please install batteries that are multi-volt or BSL18xx series.

Charger

Symptom	Possible cause	Remedy

The charge indicator lamp rapidly flickers purple, and battery charging doesn’t begin.| The battery is not inserted all the way.| Insert the battery firmly.
There is foreign matter in the battery terminal or where the battery is attached.| Remove the foreign matter.
The charge indicator lamp blinks red, and battery charging doesn’t begin.| The battery is not inserted all the way.| Insert the battery firmly.
The battery is overheated.| If left alone, the battery will automatically begin charging if its temperature decreases, but this may reduce battery life. It is

recommended that the battery be cooled in a well-ventilated location away from direct sunlight before charging it.

Battery usage time is short even though the battery is fully charged.| The battery’s life is depleted.| Replace the battery with a new one.
The battery takes a long time to charge.| The temperature of the battery, the charger, or the surrounding environment is extremely low.| Charge the battery indoors or in another warmer environment.
The charger’s vents are blocked, causing its internal components to overheat.| Avoid blocking the vents.
The cooling fan is not running.| Contact a HiKOKI Authorized Service Center for repairs.

SELECTING ACCESSORIES

Select accessories that are suited to a speciﬁ c task. For details contact HiKOKI Authorized Service Center. $HIKOKI-DH-18DPA-Cordless-Rotary-Hammer-fig- $43$$