makita DTWA190 Cordless Impact Wrench Instruction Manual

makita DTWA190 Cordless Impact Wrench

SPECIFICATIONS

Approx.

25 – 125 N•m

Square drive| 9.5 mm| 12.7 mm
No load speed (RPM)| 0 – 2,500 min-1| 0 – 2,700 min-1| 0 – 2,600 min-1
Impacts per minute| 0 – 3,700 min-1| 0 – 3,300 min-1| 0 – 3,000 min-1
Overall length| 144 mm| 151 mm| 158 mm
Rated voltage| D.C. 14.4 V
Net weight| 1.1 – 1.4 kg| 1.2 – 1.4 kg| 1.2 – 1.5 kg| 1.3 – 1.6 kg
Applicable USB cable| 661432-2

• Due to our continuing program of research and development, the specifications herein are subject to change without notice.
• Specifications may differ from country to country
• The weight may differ depending on the attachment(s), including the battery cartridge. The lightest and heaviest combination, according to EPTA-Procedure 01/2014, are shown in the table.

Applicable battery cartridge and charger

• Some of the battery cartridges and chargers listed above may not be available depending on your region of residence.

WARNING: Only use the battery cartridges and chargers listed above. Use of any other battery cartridges and chargers may cause injury and/or fire.

Intended use

The tool is intended for fastening bolts and nuts.

Noise

The typical A-weighted noise level determined according to EN62841-2-2:
Model DTWA070
Sound pressure level (LpA) : 92 dB(A)
Sound power level (LWA) : 103 dB (A)
Uncertainty (K) : 3 dB(A)
Model DTWA100
Sound pressure level (LpA) : 93 dB(A)
Sound power level (LWA) : 104 dB (A)
Uncertainty (K) : 3 dB(A)
Model DTWA140
Sound pressure level (LpA) : 96 dB(A)
Sound power level (LWA) : 107 dB (A)
Uncertainty (K) : 3 dB(A)
Model DTWA190
Sound pressure level (LpA) : 95 dB(A)
Sound power level (LWA) : 106 dB (A)
Uncertainty (K) : 3 dB(A)

NOTE: The declared noise emission value(s) has been measured in accordance with a standard test method and may be used for comparing one tool with another.
NOTE: The declared noise emission value(s) may also be used in a preliminary assessment of exposure.

WARNING: Wear ear protection.
WARNING: The noise emission during actual use of the power tool can differ from the declared value(s) depending on the ways in which the tool is used especially what kind of workpiece is processed.
WARNING: Be sure to identify safety measures to protect the operator that are based on an estimation of exposure in the actual conditions ofuse (taking account of all parts of the operating cycle such as the times when the tool is switched off and when it is running idle in addition to the trigger time).

Vibration

The vibration total value (tri-axial vector sum) determined according to EN62841-2-2:
Model DTWA070
Work mode: impact tightening of fasteners of the maximum capacity of the tool
Vibration emission (ah) : 9.0 m/s2
Uncertainty (K) : 1.5 m/s2
Model DTWA100
Work mode: impact tightening of fasteners of the maximum capacity of the tool
Vibration emission (ah) : 8.5 m/s2
Uncertainty (K) : 1.5 m/s2
Model DTWA140
Work mode: impact tightening of fasteners of the maximum capacity of the tool
Vibration emission (ah) : 10.0 m/s2
Uncertainty (K) : 1.5 m/s2
Model DTWA190
Work mode: impact tightening of fasteners of the maximum capacity of the tool
Vibration emission (ah) : 10.5 m/s2
Uncertainty (K) : 1.5 m/s2

NOTE: The declared vibration total value(s) has been measured in accordance with a standard test method and may be used for comparing one tool with another.
NOTE: The declared vibration total value(s) may also be used in a preliminary assessment of exposure.

WARNING: The vibration emission during actual use of the power tool can differ from the declared value(s) depending on the ways in which the tool is used especially what kind of workpiece is processed.
WARNING: Be sure to identify safety measures to protect the operator that are based on an estimation of exposure in the actual conditions of use (taking account of all parts of the operating cycle such as the times when the tool is switched off and when it is running idle in addition to the trigger time).

EC Declaration of Conformity

For European countries only The EC declaration of conformity is included as Annex A to this instruction manual.

SAFETY WARNINGS

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.

Cordless impact wrench safety warnings

1. Hold the power tool by insulated gripping surfaces, when performing an operation where the fastener may contact hidden wiring. Fasteners contacting a “live” wire may make exposed metal parts of the power tool “live” and could give the operator an electric shock.
2. Wear ear protectors.
3. Check the impact socket carefully for wear, cracks or damage before installation.
4. Hold the tool firmly.
5. Keep hands away from rotating parts.
6. Do not touch the impact socket, bolt, nut or the workpiece immediately after operation. They may be extremely hot and could burn your skin.
7. Always be sure you have a firm footing. Be sure no one is below when using the tool in high locations.
8. The proper fastening torque may differ depending upon the kind or size of the bolt. Check the torque with a torque wrench.
9. Make sure there are no electrical cables, water pipes, gas pipes etc. that could cause a hazard if damaged by use of the tool.

SAVE THESE INSTRUCTIONS.

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.

Important safety instructions for battery cartridge

1. Before using battery cartridge, read all instructions and cautionary markings on (1) battery charger, (2) battery, and (3) product using battery.

2. Do not disassemble or tamper with the battery cartridge. It may result in a fire, excessive heat, or explosion.

3. If operating time has become excessively shorter, stop operating immediately. It may result in a risk of overheating, possible burns and even an explosion.

4. If electrolyte gets into your eyes, rinse them out with clear water and seek medical attention right away. It may result in loss of your eyesight.

5. Do not short the battery cartridge: (1) Do not touch the terminals with any conductive material. (2) Avoid storing battery cartridge in a container with other metal objects such as nails, coins, etc. (3) Do not expose battery cartridge to water or rain.
   A battery short can cause a large current flow, overheating, possible burns and even a breakdown.

6. Do not store and use the tool and battery cartridge in locations where the temperature may reach or exceed 50 °C (122 °F).

7. Do not incinerate the battery cartridge even if it is severely damaged or is completely worn out. The battery cartridge can explode in a fire.

8. Do not nail, cut, crush, throw, drop the battery cartridge, or hit against a hard object to the battery cartridge. Such conduct may result in a fire, excessive heat, or explosion.

9. Do not use a damaged battery.

10. The contained lithium-ion batteries are subject to the Dangerous Goods Legislation requirements. For commercial transports e.g. by third parties, forwarding agents, special requirement on packaging and labeling must be observed. For preparation of the item being shipped, consulting an expert for hazardous material is required. Please also observe possibly more detailed national regulations. Tape or mask off open contacts and pack up the battery in such a manner that it cannot move around in the packaging.

11. When disposing the battery cartridge, remove it from the tool and dispose of it in a safe place. Follow your local regulations relating to disposal of battery.

12. Use the batteries only with the products specified by Makita. Installing the batteries to non-compliant products may result in a fire, excessive heat, explosion, or leak of electrolyte.

13. If the tool is not used for a long period of time, the battery must be removed from the tool.

14. During and after use, the battery cartridge may take on heat which can cause burns or low temperature burns. Pay attention to the handling of hot battery cartridges.

15. Do not touch the terminal of the tool immediately after use as it may get hot enough to cause burns.

16. Do not allow chips, dust, or soil stuck into the terminals, holes, and grooves of the battery cartridge. It may result in poor performance or breakdown of the tool or battery cartridge.

17. Unless the tool supports the use near high-voltage electrical power lines, do not use the battery cartridge near high-voltage electrical power lines. It may result in a malfunction or breakdown of the tool or battery cartridge.

18. Keep the battery away from children.

SAVE THESE INSTRUCTIONS.

CAUTION: Only use genuine Makita batteries. Use of non-genuine Makita batteries, or batteries that have been altered, may result in the battery bursting causing fires, personal injury and damage. It will also void the Makita warranty for the Makita tool and charger

Tips for maintaining maximum battery life

1. Charge the battery cartridge before completely discharged. Always stop tool operation and charge the battery cartridge when you notice less tool power.
2. Never recharge a fully charged battery cartridge. Overcharging shortens the battery service life.
3. Charge the battery cartridge with room temperature at 10 °C – 40 °C (50 °F – 104 °F). Let a hot battery cartridge cool down before charging it.
4. When not using the battery cartridge, remove it from the tool or the charger.
5. Charge the battery cartridge if you do not use it for a long period (more than six months).

FUNCTIONAL DESCRIPTION

CAUTION: Always be sure that the tool is switched off and the battery cartridge is removed before adjusting or checking function on the tool.

Installing or removing battery cartridge

CAUTION: Always switch off the tool before installing or removing of the battery cartridge.
CAUTION: Hold the tool and the battery cartridge firmly when installing or removing battery cartridge. Failure to hold the tool and the battery cartridge firmly may cause them to slip off your hands and result in damage to the tool and battery cartridge and a personal injury

► Fig.1: 1. Red indicator 2. Button 3. Battery cartridge

To remove the battery cartridge, slide it from the tool while sliding the button on the front of the cartridge.
To install the battery cartridge, align the tongue on the battery cartridge with the groove in the housing and slip it into place. Insert it all the way until it locks in place with a little click. If you can see the red indicator as shown in the figure, it is not locked completely.

CAUTION: Always install the battery cartridge fully until the red indicator cannot be seen. If not, it may accidentally fall out of the tool, causing injury to you or someone around you.
CAUTION: Do not install the battery cartridge forcibly. If the cartridge does not slide in easily, it is not being inserted correctly

Tool / battery protection system

The tool is equipped with a tool/battery protection system. This system automatically cuts off power to the motor to extend tool and battery life. The tool will automatically stop during operation if the tool or battery is placed under one of the following conditions:

Overload protection
When the battery is operated in a manner that causes it to draw an abnormally high current, the tool automatically stops without any indication. In this situation, turn the tool off and stop the application that caused the tool to become overloaded. Then turn the tool on to restart.

Overheat protection
When the tool/battery is overheated, the tool stops automatically. In this situation, let the tool/battery cool before turning the tool on again.

Overdischarge protection
When the battery capacity is not enough, the tool stops automatically. In this case, remove the battery from the tool and charge the battery.

Checking the remaining battery capacity (BL1460A)

Fig.2: 1. Indicator lamps 2. Check button

NOTE: Depending on the conditions of use and the ambient temperature, the indication may differ slightly from the actual capacity.

When charging

When the charging begins, the first (far left) indicating lamp begins to blink. Then, as charging proceeds, the other lamps light, one after the other, to indicate the battery capacity.

NOTE: If the indicator lamp does not turn on or blink when charging, the battery may be faulty. In this case, ask your local service center.

When charging
When the tool is switched on, the lamps will light to indicate the remaining battery capacity. When the tool is switched off, the light goes out after approx. 5 seconds. When pushing the check button with the tool switched off, the indicator lamps turn on for approx. 5 seconds to show battery capacity.
If the orange lamp blinks, the tool stops because of little remaining battery capacity (Auto-stop mechanism). Charge the battery cartridge or use a charged battery cartridge at this time. When the tool is used with the battery that has not been used for a long time and is switched on, no lamps may light up. The tool stops because of little remaining battery capacity at this time. Charge the battery properly.

Switch action

Fig.3: 1. Switch trigger

CAUTION: Before installing the battery cartridge into 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. Tool speed is increased by increasing pressure on the switch trigger. Release the switch trigger to stop.

NOTE: The tool automatically stops if you keep pulling the switch trigger for about 3 minutes.

Lighting up the front lamp

► Fig.4: 1. Lamp

CAUTION: Do not look in the light or see the source of light directly.

Pull the switch trigger to light up the lamp. The lamp keeps on lighting while the switch trigger is being pulled. The lamp goes out approximately 10 seconds after releasing the switch trigger.

NOTE: Use a dry cloth to wipe the dirt off the lens of the lamp. Be careful not to scratch the lens of lamp, or it may lower the illumination.

Reversing switch action

Fig.5: 1. Reversing switch lever

CAUTION: Always check the direction of rotation before operation. ?
**CAUTION: Use the reversing switch only after the tool comes to a complete stop. Changing the direction of rotation before the tool stops may damage the tool.
**CAUTION: When not operating the tool, always set the reversing switch lever to the neutral position.

This tool has a reversing switch to change the direction of rotation. Depress the reversing switch lever from the A side for clockwise rotation or from the B side for counterclockwise rotation. When the reversing switch lever is in the neutral position, the switch trigger cannot be pulled.

Changing the parameter setting on the computer

You can configure detailed setting of the tool with the application software “Makita Industry Tool Settings”. Install the application software on the computer and connect the tool to the computer with a USB cable. Refer to the instruction manual of “Makita Industry Tool Settings” for details on configuration.

Fig.6: 1. USB port 2. USB cover 3. USB cable

NOTICE: Make sure that the USB cover closed when fastening.

NOTE: When the reversing switch lever is depressed in the clockwise rotation, the indicator shows the setting of clockwise rotation. When the reversing switch lever is depressed in the counterclockwise rotation, the indicator shows the setting of counterclockwise rotation.
NOTE: Use preset number as a guideline. To keep the fastening torque, number of impacts changes automatically according to remaining battery capacity.
NOTE: Use the makita genuine USB cable to connect your computer to the tool. Refer to the section “SPECIFICATIONS”.
NOTE: For the application software, please contact Makita sales representative.

Changing the parameter setting on the tool (Field Setting mode)

NOTICE: This function is available by default. If you have disabled the Field Setting mode on the computer, enable this function beforehand. Refer to the instruction manual of “Makita Industry Tool Settings” for how to configure.
NOTICE: If the Field Setting mode is disabled, making settings on the tool is not available. When you press the setting button, the values set on the tool are displayed in order.

The current setting number is displayed on the indicator.
Every time you press the setting button, the indicator shows torque level, rundown level, workable time range, and “Ad”.
► Fig.7: 1. Setting button 2. Indicator

You can change the following parameter settings on your tool:

• Auto-stop setting / Free mode

continue to pull the switch trigger.
NOTICE: If “OP” (Loosening Auto Stop mode) is displayed on the indicator, torque level setting and rundown level setting is not available. In this case, change the mode to Tightening Auto Stop mode, and then set the torque level and rundown level on the computer using “Makita Industry Tool Settings”.

Changing the torque level

When changing the torque level from 23 to 34 ► Fig.8

1. Press the setting button several times until the indicator shows 2-digit number which stands for the current setting of the torque level.
2. Press and hold the setting button until the number in the tens place starts blinking.
3. Set the number in the tens place by pressing the setting button briefly. Every time you press the setting button, the indicator shows the number from “0” to “4” and “F” in a cycle.
4. Press and hold the setting button until the number in the ones place starts blinking.
5. Set the number in the ones place by pressing the setting button briefly. Every time you press the setting button, the indicator shows the number from “0” to “9” and “F” in a cycle.
6. Press and hold the setting button for a few seconds.

NOTE: If you are not sure which torque level is suitable for your work, set “FF” so that the tool operates in the Free mode.
NOTE: If you input “00”, “FF” is displayed instead of “00”

Changing the rundown level

When changing the rundown level from L1 to L2 ► Fig. 9

1. Press the setting button several times until the indicator shows 2 characters beginning with “L” followed by a number. This stands for the current setting of the rundown level.
2. Press and hold the setting button until the indicator starts blinking.
3. Set the rundown level. Every time you press the setting button, the indicator shows from “L1” to “L7” in a cycle. The lowest rundown level is “L1” and “L7” is the highest.
4. Press and hold the setting button for a few seconds.

Changing the shortest workable time range

When changing the shortest workable time range from 2.5 to 3.6 ► Fig.10

1. Press the setting button several times until the indicator shows “Lo” and number alternatively. This stands for the current setting of the shortest workable time range.
2. Press and hold the setting button until the number in the ones place starts blinking.
3. Set the number in the ones place by pressing the setting button briefly. Every time you press the setting button, the indicator shows the number from “0” to “9” in a cycle.
4. Press and hold the setting button until the number in the decimal place starts blinking.
5. Set the number in the decimal place by pressing the setting button briefly. Every time you press the setting button, the indicator shows the number from “0” to “9” in a cycle.
6. Press and hold the setting button for a few seconds.

NOTE: When you set the value smaller than “0.1” for the shortest workable time range, the indicator shows “-.-” and the shortest workable time range becomes disabled. To input “-.-“, set the value to “0.9”, and then press the setting button when the number in the ones place is blinking.

Changing the longest workable time range

When changing the longest workable time range from 2.5 to 3.6 ► Fig.11

1. Press the setting button several times until the indicator shows “HI” and number alternatively. This stands for the current setting of the longest workable time range.
2. Press and hold the setting button until the number in the ones place starts blinking.
3. Set the number in the ones place by pressing the setting button briefly. Every time you press the setting button, the indicator shows the number from “0” to “9” in a cycle.
4. Press and hold the setting button until the number in the decimal place starts blinking.
5. Set the number in the decimal place by pressing the setting button briefly. Every time you press the setting button, the indicator shows the number from “0” to “9” in a cycle.
6. Press and hold the setting button for a few seconds.

NOTE: When you set the value larger than “9.9” for the longest workable time range, the indicator shows “-.-” and the longest workable time range becomes disabled. To input “-.-“, set the value to “9.9”, and then press the setting button when the number in the ones place is blinking.

Measuring an actual operation (Self-diagnosis)

NOTICE: This function is available by default. If you have disabled the Field Setting mode on the computer, enable this function beforehand. Refer to the instruction manual of “Makita Industry Tool Settings” for how to configure.

You can measure the torque level and operating time of an actual operation by operating the tool. Measured torque level and time can be used for such as;

• Reproducing a torque control technic of a well-skilled worker and;
• A time reference for the setting of the shortest/longest workable time range.

Measuring the torque level and operating time

1. Press the setting button several times until “Ad.” is displayed on the indicator.

2. Press and hold the setting button until the indicator shows “Ch”.

3. Perform the operation that you want to measure the operating time.
   • If you have configured the torque level, operate the tool until it stops in the Tightening Auto Stop mode.
   • If you have not configured the torque level (Free mode), operate the tool as necessary.

4. Check the measured result. Press the setting button once to display the actual torque level, and press it one more time to display the actual operating time. Every time you press the setting button, the indicator shows “Ch”, the number of actual torque level, and the number of actual operating time in a cycle.

5. Press and hold the setting button to exit the Self-diagnosis.

NOTE: The Tightening Auto Stop mode works even in the Self-diagnosis. If you want to measure the torque level without limitation, set the torque level “FF” (Free mode) and perform the procedures above.
NOTE: If “- -” is displayed on the indicator, the impact did not work or the torque level is higher than 40. If “-.-” is displayed in the indicator, the operating time exceeded 9.9 seconds.

• In case the impact did not work: Remeasure the torque level with longer workable time.
• In case the torque level is higher than 40: The tool cannot measure the torque level. Use the tool with higher torque range if available.
• In case the operating time exceeded 9.9 seconds, the workable time range is not available.

Measuring example:
If you configure the following setting, you can read the tool status.

Case 1

workable time range (3.5 sec.) before it reaches the setting of the Tightening Auto Stop mode (torque level 23).
Workable time range| shortest: 2.5 sec.
longest: 3.5 sec.| 3.5

Case 2

(torque level 23) before it reaches the setting of longest workable time range (3.5 sec.).
Workable time range| shortest: 2.5 sec.
longest: 3.5 sec.| 3

LED indicator / beeper

► Fig.12: 1. LED indicator

LED indicator / beeper on the tool shows the following functions.

Alarm No.| Function| Status of the tool| Status of the LED indicator/beeper| Action to be taken
---|---|---|---|---
LED indicator| Beeper
E0| Battery installation error| If the battery car- tridge is installed with the switch trigger pulled, the tool stops to avoid unintentional start.| Blinks in red and green alternatively.| A series of long beeps| Install the battery cartridge  with the switch trigger released.
E1| Auto-stop| The battery power became low and it is time to replace the battery cartridge.| Blinks in red and green alternatively.| A series of long beeps| Replace the battery with fully charged one.
E2| Anti-reset of controller| The battery voltage dropped abnor- mally for some reason, and the tool stopped.| Blinks in red and green alternatively.| A series of long beeps| Replace the battery with fully charged one.
E3| Auto-stop with low remaining battery capacity| The battery power is almost used up and the tool stopped.| Lights up in red.| A long beep| Replace the battery with fully charged one.
E4| Overload protection| The tool was over- loaded and stopped.| Blinks in red and green alternatively.| A series of long beeps| Remove the cause of overload, and then restart the tool. Ask your local Makita Service Center for repair.
E5| Overheat protection| Tool’s controller heated up abnor- mally and the tool stopped.| Blinks in red quickly.| A series of long beeps| Remove the battery cartridge immedi- ately and cool the tool down.
E6| Motor lock| The motor has been locked. At this time, the tool does not work.| Blinks in red and green alternatively.| A series of long beeps| Release the switch trigger and pull it again.
E7| Motor failure| The tool detected a motor failure. At this time, tool does not work.| Blinks in red and green alternatively.| A series of long beeps| Ask your local Makita Service Center for repair.
E8| Switch failure| The tool detected a switch failure.| Blinks in red and green alternatively.| A series of long beeps| Ask your local Makita Service Center for repair.
E9| Alarm for a long period of use| The tool has been turned on for a long time (Approx. 3 minutes).| Blinks in red and green alternatively.| A long beep| Release the switch trigger and pull it again.
–| Auto-stop with fas- tening completion| The preset fasten- ing torque has been achieved and the tool has stopped.| Lights up in green for approximately one second.| –| –
–| Alarm for insufficient fastening| The preset fas- tening torque has not been achieved because the switch trigger was released before completing the fastening.| Lights up in red for approximately one second.| A long beep| Retighten the fastener.
–| Alarm for limit of the fastening capacity| –| Blinks in red quickly.| A series of long beeps| Replace the battery with fully charged one.
–| Maintenance alarm| The number of drive has been reached to your preset number for the maintenance.| Blinks in yellow.| –| Reset the alarm with the application software.
–| Alarm for no com- munication with the PC| No data commu- nication while the tool is connected to the PC.| Blinks in yellow.| –| Restart the appli- cation software and re-connect the USB cable.
–| Indication that the tool can communi- cate with the PC| The tool is con- nected to the PC and able to commu- nicate with.| Blinks in green.| –| –
–| Check for the lamp and beeper (when the battery cartridge is installed)| The tool performs the operation test for the LED indicator (green/red), light, and beeper.| The LED indicator lights up in green and then red. After that, the light turns on for a while.| A series of very short beeps| –

ASSEMBLY

CAUTION: Always be sure that the tool is switched off and the battery cartridge is removed before carrying out any work on the tool.

Selecting correct impact socket

Always use the correct size impact socket for bolts and nuts.
An incorrect size impact socket will result in inaccurate and inconsistent fastening torque and/or damage to the bolt or nut

Installing or removing impact socket

Optional accessory

CAUTION: Make sure that the impact socket and the mounting portion are not damaged before installing the impact socket.
CAUTION: After inserting the impact socket, make sure that it is firmly secured. If it comes out, do not use it

NOTE: The way of impact socket installation varies depending on the type of the square drive on the tool.

Tool with the ring spring

For impact socket without O-ring and pin
► Fig.13: 1. Impact socket 2. Square drive 3. Ring spring
Push the impact socket onto the square drive until it locks into place.
To remove the impact socket, simply pull it off.

For impact socket with O-ring and pin
► Fig.14: 1. Impact socket 2. O-ring 3. Pin
Move the O-ring out of the groove in the impact socket and remove the pin from the impact socket. Fit the impact socket onto the square drive so that the hole in the impact socket is aligned with the hole in the square drive.
Insert the pin through the hole in the impact socket and square drive. Then return the O-ring to the original position in the impact socket groove to retain the pin.
To remove the impact socket, follow the installation procedures in reverse

Tool with the detent pin

► Fig.15: 1. Impact socket 2. Hole 3. Square drive 4. Detent pin
Align the hole in the side of the impact socket with the detent pin on the square drive and push the impact socket onto the square drive until it locks into place. Tap it lightly if required.
To remove the impact socket, simply pull it off. If it is hard to remove, depress the detent pin while pulling the impact socket.

Installing hook

Optional accessory
The hook is useful to hang the tool. Install the hook to the holes on the tool body.
► Fig.16: 1. Hook 2. Hole

OPERATION

CAUTION: Always insert the battery cartridge all the way until it locks in place. If you can see the red indicator on the upper side of the button, it is not locked completely. Insert it fully until the red indicator cannot be seen. If not, it may accidentally fall out of the tool, causing injury to you or someone around you.
CAUTION: Hold the tool firmly and place the impact socket over the bolt or nut. Turn the tool on and fasten for the proper fastening time.
CAUTION: If the tool is operated continuously until the battery cartridge has discharged, allow the tool to rest for 15 minutes before proceeding with a fresh battery cartridge.
CAUTION: Pressing excessively on the tool will not speed up the drilling. In fact, this excessive pressure will only serve to damage the tip of your drill bit, decrease the tool performance and shorten the service life of the tool.
CAUTION: Always secure workpieces in a vise or similar hold-down device.

► Fig.17

NOTICE: When fastening small bolts, carefully adjust pressure on the switch trigger so that the bolt is not damaged.
NOTICE: Hold the tool pointed straight at the bolt or nut.
NOTICE: Excessive fastening torque may damage the bolt/nut or impact socket. Before starting your job, always perform a test operation to determine the proper fastening time for your bolt or nut.

The fastening torque is affected by a wide variety of factors including the following. After fastening, always check the torque with a torque wrench.

1. When the battery cartridge is discharged almost completely, voltage will drop and the fastening torque will be reduced.

2. Impact socket
   • Failure to use the correct size impact socket will cause a reduction in the fastening torque.
   • A worn impact socket (wear on the hex end or square end) will cause a reduction in the fastening torque.

3. Bolt
   • Even though the torque coefficient and the class of bolt are the same, the proper fastening torque will differ according to the diameter of bolt.
   • Even though the diameters of bolts are the same, the proper fastening torque will differ according to the torque coefficient, the class of bolt and the bolt length.

4. The use of the universal joint or the extension bar somewhat reduces the fastening force of the impact wrench. Compensate by fastening for a longer period of time.

5. The manner of holding the tool or the material of driving position to be fastened will affect the torque.

6. Operating the tool at low speed will cause a reduction in the fastening torque.

Fastening torque and torque level

NOTE: This reference value is measured by the measurement conditions specified by Makita.
NOTE: The actual value may differ according to circumstances of the fasteners, materials, and fastening method. Perform a test drive before actual work.

1. Torque level 2. Fastening torque

MAINTENANCE

CAUTION: Always be sure that the tool is switched off and the battery cartridge is removed before attempting to perform inspection or maintenance.

NOTICE: Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result.

To maintain product SAFETY and RELIABILITY, repairs, any other maintenance or adjustment should be performed by Makita Authorized or Factory Service Centers, always using Makita replacement parts.

OPTIONAL ACCESSORIES

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.

• Hook
• Protector (Blue, Red, Yellow, Green, Clear)
• Battery Protector for BL1460A
• Battery Protector for BL1415NA
• Makita genuine battery and charger
• USB cable

NOTE: Some items in the list may be included in the tool package as standard accessories. They may differ from country to country.

Makita Europe N.V.
Jan-Baptist Vinkstraat 2,
3070 Kortenberg, Belgium

Makita Corporation
3-11-8, Sumiyoshi-cho,
Anjo, Aichi 446-8502 Japan

www.makita.com

Documents / Resources

| makita DTWA190 Cordless Impact Wrench [pdf] Instruction Manual
DTWA190, Cordless Impact Wrench, DTWA190 Cordless Impact Wrench
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References

• MAKITA Industrial Power Tools - The Leader In Cordless with 18V LXT Lithium-Ion

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