HiKOKI NV 90AB Compressed Air Coil Nailer Instruction Manual

COIL NAILER
NV 90AB
Read through carefully and understand these instructions before use.
Handling instructions

GENERAL OPERATIONAL PRECAUTIONS

WARNING Read all safety warnings, instructions, illustrations and specifications provided with this power tool.
Failure to follow all instructions listed below may result in serious injury.
Save all warnings and instructions for future reference.

1. Operate the power tool safely for correct uses.
   Do not use the power tool for uses other than those specified in this instructions.

2. For safe operation handle the power tool correctly.
   Please follow the instructions given in this instruction manual and correctly handle this tool so as to ensure safe operation. Never let the tool be use by children or people who do not know enough to be  able to handle it correctly, or let it be used by people who cannot operate it correctly.

3. Confirm the safety of the workshop.
   Keep unauthorized people away from the workshop.
   Especially children should be kept away.

4. The right parts in the right places.
   Do not remove any of the covers or screws. Keep the min place as they have their functions. Moreover, because it would be dangerous, never make modifications to the tool or use it after making  modifications.

5. Check the tool before using it.
   Before using the tool, always check that no parts of it are broken, that all screws are completely tight, and that no parts are missing or rusty.

6. Excessive work could cause accidents.
   Do not make tools and accessories work beyond their abilities. Excessive work not only damages the power tool but also is dangerous in itself.

7. Stop operation immediately if abnormalities are noticed.
   Stop operation if you notice abnormalities, or if the power tool does not work properly; have the power tool inspected and serviced.

8. Look after the power tool carefully.
   If you drop or knock the power tool against things, the outer frame may be deformed and cracks or other kinds of damage may occur, so please handle it with sufficient care. Also, do not scratch or engrave signs on the power tool. Owing to high pressure air inside the tool, cracks in the surface are dangerous.
   Never use the power tool if a crack develops or if air is escaping from a crack.

9. Take good care for a long life.
   Always take good care of the power tool and keep it clean.

10. Inspection at regular intervals is essential for safety.
    Inspect the power tool at regular intervals so that the power tool can be operated safety and efficiently at all times.

11. Consult an authorized service agent if repair or parts replacement is necessary.
    Ensure that the power tool is serviced by authorized service centers only, and that only genuine, replacement parts are used.

12. Keep the power tool in a proper place.
    When not in use, the power tool should be kept in a dry place out of the reach of children. Put into the body about 2 cc oil through the hose joint to protect the tool from rust.

13. The exploded assembly drawing on this handling instructions should be used only for authorized service center.

14. Hold the tool with a firm grasp and be prepared to manage recoil.

15. 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.

16. Do not modify the fastener driving tool.
    Modifications may reduce the effectiveness of safety measures and increase the risks to the operator and/or bystander.

17. Maintain power tools and accessories. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power toolʼs operation. If damaged, have the  power tool repaired before use.
    Many accidents are caused by poorly maintained power tools.

18. Do not overreach. Keep proper footing and balance at all times.
    This enables better control of the power tool in unexpected situations.

19. Keep children and bystanders away while operating a power tool.
    Distractions can cause you to lose control.

PRECAUTIONS ON USING NAILER

1. Safe operation through correct usage
   This tool was designed for driving nails into wood and similar materials. Use it for its intended purpose only.

2. Make sure air pressure is within the rated range of air pressure.
   Please make sure that the air pressure is within a range of 4.9 bar – 8.3 bar (70 ~ 120 psi.), and that the air which is used is clean and dry. If the air pressure is greater than 8.3 bar (120 psi.), the life of the power tool will be shortened and dangerous conditions could develop. Tools shall not be connected to pressure which potentially exceeds 14 bar (200 psi.).

3. Never operate the equipment with high-pressure gases other than compressed air.
   Never use carbon dioxide, oxygen or another gas from pressurized containers under any circumstances.

4. Be careful of ignition and explosions.
   Since sparks may fl y during nailing, it is dangerous to use this tool near lacquer, paint, benzine, thinner, gasoline, gas, adhesives and similar inflammable substances as they may ignite or explode. Under no circumstances should this tool therefore be used in the vicinity of such inflammable material.

5. Always wear eye protection (protective goggles).
   When operating the power tool, always wear eye protection, and ensure that surrounding people wear eye protection too.
   The possibility of fragments of the wire or plastic linking the nails or nails that were not properly hit entering the eye is a threat to sight. Eye protection can be bought at any hardware store. Always wear  eye protection while operating this tool. Use either eye protection or a wide vision mask over prescription glasses.
   Employers should always enforce the use of eye protection equipment.

6. Protect your ears and head.
   When engaged in nailing work please wear ear mufflers and head protection.
   Also, depending on condition, ensure that surrounding people also wear ear mufflers and head protection.
   Unprotected exposure to high noise levels can cause permanent, disabling, hearing loss and other problems such as tinnitus (ringing, buzzing, whistling or humming in the ears).
   Risk assessment and implementation of appropriate controls for these hazards are essential.
   Appropriate controls to reduce the risk may include actions such as damping materials to prevent workpieces from “ringing”.
   Operate and maintain the tool as recommended in these instructions, to prevent an unnecessary increase in noise levels.

7. Pay attention to those working close to you.
   It would be very dangerous if nails that were not properly driven in should hit other people. Therefore, always pay attention to the safety of the people around you when using this tool. Always make sure  that nobody’s body, hands or feet are close to the nail outlet.

8. Never point the nail outlet towards people.
   Always assume the tool contains fasteners.
   If the nail outlet is pointed towards people, serious accidents may be caused if you mistakenly discharge the tool. When connecting and disconnecting the hose, during nail loading or similar operations,  be sure the nail outlet is not pointed towards anyone (including yourself). Even when no nails are loaded at all, it is dangerous to discharge the tool while pointing it at someone, so never attempt to do so. No horseplay.
   Respect the tool as a working implement.

9. Before using the power tool, check the push lever.
   Before using the power tool make sure to check that the push lever and valve operate properly. Without nails loaded into the power tool, connect the hose and check the following. If the sound of  operation occurs this indicates a fault, so in such a case do not use the power tool until it has been inspected and repaired.
   ○ If merely pulling the trigger causes operating sound of drive bit movement occur, the power tool is faulty.
   ○ If merely pushing the push lever against the material to be nailed causes the sound of drive bit movement to occur, the power tool is faulty. Furthermore, with regard to the push lever, please note that  it must never be modified or removed.

10. Use specified nails only.
    Never use nails other than those specified and described in these instructions.

11. Do not modify the fastener driving tool.
    Modifi cations may reduce the eff ectiveness of safety measures and increase the risks to the operator and/or bystander.

12. Be careful when connecting the hose.
    When connecting the hose and loading nails in order not to fi re the tool by mistake, make sure of the following.
    ○ Do not touch the trigger.
    ○ Do not allow the firing head to contact with any surface.
    ○ Keep the fi ring head down.
    Strictly observe the above instructions, and always make sure that no part of the body, hands or legs is ever in front of the nail outlet.

13. Be careful when handling fasteners, especially when loading and unloading, as the fasteners have sharp points which could cause injury.

14. Do not carelessly place your finger on the trigger.
    Do not place your finger on the trigger except when actually nailing. If you carry this tool or hand it to someone while having your finger on the trigger, you may inadvertently discharge a nail and thus  cause an accident.

15. Completely Close the nail guide and do not open it during operation.
    If nailing is attempted when the nail guide is open, nails will not be driven into the timber, and there is a risk of dangerous discharge.

16. Press the nail outlet firmly against the material to be nailed.
    When driving in nails, press the nail outlet firmly against the material to be nailed. If the outlet is not applied properly, the nails may rebound.

17. Keep hands and feet away from the fi ring head when using.
    It is very dangerous for a nail to hit the hands or feet by mistake.

18. During operation, debris from workpiece and  fastening/collation system may be discharged.

19. Beware of the tool’s kickback.
    Do not approach the top of the tool with your head etc.
    during operation. This is dangerous because the tool may recoil violently if the nail currently being driven in comes into contact with a previous nail or a knot in the wood.

20. Take care when nailing thin boards or the corners of wood.
    When nailing thin boards, the nails may pass right through, as may also be the case when nailing the corners of wood due to deviation of the nails. In such cases, always make sure that there is no one  (and nobody’s hands or feet; etc.) behind the thin board or next to the wood you are going to nail.

21. Simultaneous nailing on both sides of the same wall is dangerous.
    Under no circumstances should nailing be performed on both sides of a wall at the same time. This would be very dangerous since the nails might pass through the wall and thus cause injuries.

22. Do not use the power tool on scaffoldings, ladders.
    The power tool shall not be used for specific application for example:
    – when changing one driving location to another involves the use of scafforldings, stairs, ladders or ladder alike constructions, e.g. roof laths,
    – closing boxes or crates,
    – fitting transportation safety systems e.g. on vehicles and wagons

23. Do not disconnect the hose with your finger on the trigger.
    If you disconnect the hose with your finger on the trigger, the next time the hose is connected, there is a danger that the power tool will fi re a nail spontaneously, or operate incorrectly.

24. Disconnect the hose and take out any nails left in the magazine after use.
    Disconnect tool from air before doing tool maintenance, cleaning a jammed fastener, leaving work area, moving tool to another location, or after use. It is very dangerous for a nail to be fi red by mistake.

25. When removing a nail which has become stuck, make sure to first of all disconnect the hose and release compressed air.
    When removing a nail which has become stuck in the nail outlet, first of all make sure to disconnect the hose and release compressed air inside the power tool.
    Accidental fi ring of the nail could be very dangerous.

26. To avoid hazards caused by falling nails, never open the magazine with the device facing downward while loading nails.

27. A female plug (air socket) should not be used in the body.
    If a female plug is installed in the body, the compressed air sometimes can not be drawn when the hose is disconnected so avoid this.
    The tool and air supply hose must have a hose coupling such that all pressure is removed from the tool when the coupling joint is disconnected.

28. While using a tool, the operator shall adopt a suitable but ergonomic posture.
    Maintain secure footing and avoid awkward or off balanced postures.

29. If the operator experiences symptoms such as persistent  or recurring discomfort, pain, throbbing, aching,  tingling, numbness, burning  sensation, or stiff ness,  do not ignore these warning signs.
    The operator shall consult a qualified health professional regarding overall activities. 30. Long time continuous and repetitive work may lead to muscular- skeletal disorders.
    Do not keep working with a same posture or by applying excessive force for a long time.
    And take some rest regularly and especially when you feel tired.

30. Slips, trips and falls are major causes of workplace injury. Be aware of slippery surfaces caused by use of the tool and also of trip hazards caused by the airline hose.

31. Proceed with additional care in unfamiliar surroundings.
    Hidden hazards may exist, such as electricity or other utility lines.

32. Make sure there are no electrical cables, gas pipes etc. that could cause a hazard if damaged by use of the tool.

33. Risk assessment should include dust created by the use of the tool and the potential for disturbing existing dust.

34. Direct the exhaust so as to minimize disturbance of dust in a dust filled environment.

35. Where dust or exhaust hazards are created, the priority shall be to control them at the point of emission.

36. Information to conduct a risk assessment of these hazards and implementation of appropriate controls is essential.

37. Exposure to vibration can cause disabling damage to the nerves and blood supply of the hands and arms.

38. Wear warm clothing when working in cold conditions, keep your hands warm and dry.

39. If you experience numbness, tingling, pain or whitening of the skin in your fi ngers or hands, seek medical advice from a qualified occupational health professional regarding overall activities.

40. Operate and maintain the tool as recommended in these instructions, to prevent an unnecessary increase in vibration levels.

41. Hold the tool with a light, but safe, grip because the risk from vibration is generally greater when the grip force is higher.

42. Do not remove the dust cover.
    Never operate with the dust cover removed in order to avoid the danger of breakage of the wire or plastic retaining the nails or missed-fi red nails flying about.

SPECIFICATIONS

NAIL SELECTION

Choose a suitable nail from Fig. Nails which are not shown in Fig. can not be driven with this tool. Nails are linked and rolled.

STANDARD ACCESSORIES

(1) Eye protector ……………………………………………………….1
(2) Hexagon bar wrench for M4 screw …………………………1
(3) Oiler ……………………………………………………………………1
(4) Case …………………………………………………………………..1

OPTIONAL ACCESSORY

• Sequential Trip Mechanism Kit (Code No.881-012)
  (Sequential Fire Parts Set, Single Shot Parts)
  With the sequential fi re parts, the nail is driven only by squeezing the trigger after pushing down the push lever.
  By installing these parts, driving nails into improper positions and unexpected fi ring of nails caused by accidental operation of the push lever can be prevented.

APPLICATIONS

• Construction work such as wall sheathing, roof decking, subflooring.
• Mobile and modular home construction.

PREPARATION PRIOR TO OPERATION

1. Prepare the hose
   Be sure to use the hose provided with minimum 8 mm (5/16”) inside diameter.
   NOTE:
   The air supply hoses must have a minimum working pressure rating of 12.8 bar (180 psi) or 150 percent of the maximum pressure produced in the air supply system, whichever is higher.

2. Check on safety
   CAUTIONS:
   ○ Unauthorized persons (including children) must be kept away from the equipment.
   ○ Wear eye protector.
   ○ Check the retaining screws which fi x the exhaust cover, etc. for tightness. Check the nailer for air leaks and defective or rusty parts.
   ○ Check whether or not the push lever works correctly. Also check whether or not any dirt has adhered to the moving parts of the push lever.
   ○ Recheck on operational safety.

BEFORE USE

1. Check the air pressure
   CAUTION:
   The air pressure must be constantly maintained at 4.9 – 8.3 bar (70 – 120 psi.).
   Adjust the air pressure between 4.9 to 8.3 bar (70 – 120 psi.) according to the diameters and length of nails and hardness of the wood being nailed. Pay special attention to the output pressure, capacity,  and piping on the air compressor, so that air pressure does not exceed the specified limit. Note that excessive pressure may affect overall performance, service life, and safety.

2. Lubrication
   (1) Prior to operating this nailer, be sure to provide an air set between the air compressor and this device.
   Lubrication through the air set off ers smooth operation, extended service life, and anticorrosion.
   Adjust the oiler so that a single drop of oil is supplied at intervals of 5 to 10 nailing cycles.
   (2) It is recommended using the recommended oil (SHELL TONNA). Other applicable oils are listed. Never mix two or more types of different oils.

3. Load nails
   (1) Load nails in the magazine
   ○ Grip the nail guide and knob with fingers. Then depress the knob to open the nail guide towards the left. (See Fig. 1)
   ○ Adjust the position of the nail holder according to the length of the nail. (Fig. 2)
   

For adjustment, turn the nail holder 1 counterclockwise about 90 degrees. Move the nail holder 2 up and down, adjust to the length of a nail to be used, and adjust the surface of the nail holder to the marked  position of the magazine.
Turn the nail holder 3 clockwise (about 90 degrees) until it goes click. (Fig. 3)

• Load the nails in the magazine. Load the nails in the magazine. At this time, if the wound portion of nails  is inserted after it is once pulled out beforehand, the subsequent work can be much facilitated. (Fig. 4)
• Close the cover after confirming that the nails are loaded in the magazine.

NOTE:
Before loading the nails in the magazine, position the nail holder according to the length of the nail. If the nail holder position is not adjusted, the nail jams. If the cover is forcibly closed without adjusting the  position of the nail holder, the nail holder may be damaged.
(2) Load nails in the guide Extend the nail line from the magazine.
Insert the first nail into the driving hole and the second nail between the pawls of the feeder. Insert the nail so that the nail head engages the guide slot. (Fig. 5)

Close nail guide
After making sure that the magazine cover is closed, hook your finger to the nail guide and the knob, and while pushing the knob down, turn the nail guide clockwise to completely close it. (Fig. 6)
The above operation completes the loading of nails.

NOTE:
The nail guide may not close properly or the nails may not advance properly if the linked bands or nails do not enter into the indicated position or the nails come away from the guide surface or the wire linking the nails is warped.

HOW TO USE THE NAILER
CAUTIONS:

• Do not use the body or any portion of the tool as a hammer as nails may be discharged unexpectedly or the tool may become damaged and serious injury could occur.

• Take precautions to ensure the safety of persons in the vicinity during operation. You may rest the tool on a level surface as shown in Fig. 7.
  Be sure not to apply the force downward onto the tool to the extent the push lever is engaged.

• Ensure tool is always safely engaged on the workpiece and cannot slip.

• Never carry a pneumatic tool by its hose.

• Never drag a pneumatic tool by its hose.

Nailing procedures
(1) Method of intermittently driving nails (single shot) The single-contact change lever is in the single shot position (See Fig. 9)
This nailery includes a single shot structure to allow striking of a single nail by pushing down the push lever and pulling the trigger (see Fig. 8).
CAUTION:

• [Method of intermittently driving nails (single shot)] explained here is not [Sequential fi re]. When Single contact Change Lever is  at the Single shot position, if the push  levers pushed up in a state where the  trigger is pulled, only one piece of nail in the shooting muzzle  is  red: Be careful!
  In the event it is used by Sequential fi re, use the Sequential Fire Parts Set of Optical Accessory.

• If you do not pull the trigger quickly and crisply while in the single shot mode, the nailery will bounce and shoot several nails instead of just one. To avoid this, be sure to pull the trigger quickly and crisply.
  

• Push lever
  When depressing the nail outlet, be sure to fully lift the push lever (see Fig. 8) to release the safety lock. Thus, nails cannot be driven without releasing the safety lock even though the trigger is pulled.

(2) Method for continuous driving of nails (contact drive) The single-contact change lever is in the contact driving position (See Fig. 11).
Use the accessory hexagon bar wrench to turn the single-contact change lever to the contact driving position.
First pull back the trigger. Then press the nail outlet on the place to drive nails. Driving of nails will start. (Fig. 10)

CAUTION:
Exercise care when nailing corners of lumber. When continuous nailing corners of lumber, a nail may go astray or break through the corner.
NOTES:

• Precautions on no-load operation
  Sometimes nailing will continue after driving in all nails previously contained in the magazine.
  This is termed “no-load operation”. Such operation may deteriorate the bumper, magazine, and nail feeder.
  To avoid no-load operation, occasionally confi rm the amount of remaining nails. On the other hand, all nails should be removed after using this nailer.

• After completing operation, put into the body about 2 cc oil through the hose joint to protect the tool from rust.

• Under low temperature conditions, the machine sometimes does not operate correctly. Always operate the machine at the appropriate ambient temperature.

How to use nosecap
CAUTION:
Remove the hose from the nailery and release the compressed air before installing or removing the kneecap to prevent accidental nail ejection.

• Attach the nose cap (A) on the tip of the push lever when you wish to protect the surface of wood, etc., from scratches.

Attaching and detaching nose cap
The nose cap can be attached by simply pressing it into the push lever.
Press it in until a convex part inside the nose cap enters into a hole of the push lever. (Fig. 12)

For removal, insert a thin rod such as a screw driver into the gap on the back of the push lever, and then pull it out. (Fig. 13)

Safekeeping of nose cap
Put the removed nose cap in a space behind the magazine for safekeeping. (Fig. 14)

Adjusting the nail-driving depth
CAUTION:
When making adjustments, be sure remove your finger from the trigger. When making adjustments, be sure that the nail outlet is not facing downward and that body parts or other persons are not in the path  of the nail outlet.

• Adjusting the adjuster (Fig. 15)
  Carry out test driving. If the nails are too deep, turn the adjuster to the shallow side ( mark).
  If the nail depth is too shallow, turn the adjuster to the deep side ( mark) (see Fig. 15, 16).
  Depth is changed 1 mm with each rotation of the adjuster.
  

NOTES:

• When adjusting the adjuster, it does not rotate more than 3 mm from the deepest point where a nail goes down. Do not rotate the adjuster by force beyond that point.
• The nail-driving depth can also be adjusted by changing the air pressure used. Carry this out together with movement of the adjuster. Using a high air pressure that does not match the nail-driving  resistance will shorten the life of this nailer.

Changing the exhaust direction
The direction of the exhaust vent can be changed within 360° by turning the top cover. (Fig. 17)

INSPECTION AND MAINTENANCE

CAUTION:
Be sure to disconnect the hose during cleaning jams, inspection, maintenance and cleaning.

1. Countermeasure for nail jamming
   (1) Remove the nail roll from the magazine, open the nail guide, insert a rod into the nail outlet and tap the rod with a hammer. (Fig. 18)
   (2) Remove the jammed nail with slotted-head screw driver. (Fig. 19)
   (3) Cut off the defective part of the steel wire which links the nails with cutting nippers, correct the deformation, then load the nail roll in the magazine.
   (4) In case of frequent jam, consult the Authorized Service Center from which you bought this machine.

2. Check on mounting screws for each part At regular intervals check every part for loose mounting screws and whether or not there are any air leaks.
   Retighten any loose screws. Operating the equipment with loose screws untightened will incur a hazard.

3. Inspecting the push lever
   Check if the push lever can slide smoothly. (Fig. 20) Clean up the sliding area of the push lever and use the provided oil for lubrication from time to time. Lubrication enables smooth sliding and  simultaneously serves to prevent the formation of rust.
   

4. Inspecting the feeders
   (1) Occasionally clean the knob sliding part and then apply the recommended oil. (See Fig. 21)
   Open the nail guide and remove dust, etc., as shown in Fig. 22. Apply lubricant to the sliding groove of the feeder and feeder shaft. Check nail stopper (A) and nail stopper (B) slide smoothly by pushing  them with your finger.
   (3) Also, apply the recommended oil to the feeding sur face of the nose and nail guide after cleaning. This promotes smooth operation and retards corrosion.
   CAUTION:
   Check for smooth movement of the feeders and stoppers before use. If movement is uneven, nails could be fi red at an irregular angle, presenting a hazard to the operator and others nearby.

5. Inspecting the magazine
   Clean the magazine. Remove dust of wooden chips which may have accumulated in the magazine.

6. Storing
   ○ When not in use for an extended period, apply a thin coat of the lubricant to the steel parts to avoid rust.
   ○ Do not store the Nailery in a cold weather environment.
   Keep the Nailery in a warm area.
   ○ When to in use, the Nailery should be stored in a warm and dry place.
   Keep out of reach of children.

COMPRESSOR

CAUTION:
When the maximum, operating pressure of the air compressor exceeds 8.3 bar (120 psi.), be sure to provide a reducing valve between the air compressor and nailer. Then, adjust the air pressure within the operating range of 4.9 ~ 8.3 bar (70 ~ 120 psi.). If the air set is installed, lubrication is also possible, thus providing additional convenience.

OILER-FILTER-REDUCING VALVE (Air Set)
So that the equipment can be operated under an optimum condition to ensure extended service life, it is advisable to use an oiler filter reducing valve. Please limit the length of the hose between the unit and  the air set to within 10 m when using.

APPLICABLE LUBRICANTS

(#90 – #180)

Noise Information
Noise characteristic values in accordance with EN ISO 11148 -13:2018:
The typical A-weighted single-event sound power level LWA,1s,d = 99 dB
The typical A-weighted single-event emission sound pressure level at work station LpA,1s,d = 90 dB
Uncertainty K: 2.5 dB (A).

These values are tool-related characteristic values and do not represent the noise development at the point of use. Noise development at the point of use will for example depend on the working environment,  the workpiece, the workpiece support and the number of driving operations, etc.
Depending on the conditions at the workplace and the form of the workpiece, individual noise attenuation measures may need to be carried out, such as placing workpieces on sound-damping supports,  preventing workpiece vibration by means of clamping or covering, adjusting to the minimum air pressure required for the operation involved, etc.
In special cases it is necessary to wear hearing protection equipment.

Vibration Information
The typical vibration characteristic value in accordance with EN ISO 11148-13:2018, 2000: 2.62m/s2
Uncertainty K = 1.5 m/s2
This values is a tool-related characteristic value and does not represent the influence to the hand-arm-system when using the tool. An influence to the hand- arm-system when using the tool will for example  depend on the gripping force, the contact pressure force, the working direction, the adjustment of energy supply, the workpiece, the workpiece support.

EC DECLARATION OF CONFORMITY
We declare under our sole responsibility that Coil Nailer, identified by type and specific identic cation code 1), is in conformity with all relevant requirements of the directives 2) and standards 3).
Technical fi le at 4) – See below.
The European Standard Manager at the representative office in Europe is authorized to compile the technical fi le.
The declaration is applicable to the product affixed CE marking.

Koki Holdings Co, ltd.
910
Code No. C99077076 N
Printed in Japan

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