Definitions: Safety Guidelines
BEFORE OPERATING THIS TOOL, CAREFULLY READ AND UNDERSTAND ALL INSTRUCTIONS IN THE IMPORTANT SAFETY INSTRUCTIONS SECTION.
The definitions below describe the level of severity for each signal word. Please read the manual and pay attention to these symbols.
Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
NOTICE: Indicates a practice not related to personal injury which, if not avoided, may result in property damage. IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS OR ANY DEWALT TOOL, CALL US TOLL FREE AT: 1-800-4-DEWALT (1-800-433-9258)
SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE
Important Safety Instructions
Do not operate this unit until you read this instruction manual for safety, operation and maintenance instructions.
This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling.
Some dust contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm such as asbestos and lead in lead based paint.
- Actuating tool may result in flying debris, collation material, or dust which could harm operator's eyes.
The operator and all those persons in the general area should wear safety glasses with permanently attached side shields. Approved safety glasses are imprinted with the characters "Z87.1". It is the employer's responsibility to enforce the use of eye protection equipment by the tool operator and other people in the work FIG. B area. (Fig. A)
- Always wear appropriate personal hearing and other protection during use. Under some conditions and duration of use, noise from this product may contribute to hearing loss. (Fig. A)
- Use only clean, dry, regulated air. Conden sation from an air compressor can rust and damage the internal workings of the tool. (Fig. B)
- Regulate air pressure. Use air pressure compatible with ratings on the nameplate of the tool. (Not to exceed 120 psi, 8.3 bar) Do not connect the tool to a compressor rated at over 200 psi. The tool operating pressure must never exceed 200 psi even in the event of regulator failure. (Fig. C)
- Only use air hose that is rated for a maximum working pressure of at least 150 PSI (10.3 BAR) or 150% of the maximum system pressure, which ever is greater. (Fig. D)
- Do not use bottled gases to power this tool. Bottled compressed gases such as oxygen, carbon dioxide, nitrogen, hydrogen, propane, acetylene or air are not for use with pneumatic tools. Never use combustible gases or any other reactive gas as a power source for this tool. Danger of explosion and/or serious personal injury may result. (Fig. E)
- Use couplings that relieve all pressure from the tool when it is disconnected from the power supply. Use hose connectors that shut off air supply from compressor when the tool is disconnected. (Fig. F)
- Disconnect tool from air supply when not in use. Always disconnect tool from air supply and remove fasteners from magazine before leaving the area or passing the tool to another operator. Do not carry tool to another work area in which changing location involves the use of scaffoldings, stairs, ladders, and the like, with air supply connected. Do not make adjustments, remove magazine, perform maintenance or clear jammed fasteners while connected to the air supply. If the contact trip is adjusted when the tool is connected to the air supply and nails are loaded, accidental discharge may occur. (Fig. G)
- Connect tool to air supply before loading fasteners, to prevent a fastener from being fired during connection. The tool driving mechanism may cycle when tool is connected to the air supply. Do not load fasteners with trigger or contact trip depressed, to prevent unintentional firing of a fastener.
- Do not remove, tamper with, or otherwise cause the tool, trigger, or contact trip to become inoperable.
Do not tape or tie trigger or contact trip in the on position. Do not remove spring from contact trip. Make daily inspections for free movement of trigger and contact trip. Uncontrolled discharge could result. - Inspect tool before use. Do not operate a tool if any portion of the tool, trigger, or contact trip is inoperable, disconnected, altered, or not working properly. Leaking air, damaged parts or missing parts should be repaired or replaced before use. (Fig. H)
- Do not alter or modify the tool in any way. (Fig. I)
- Always assume that the tool contains fasteners.
- Do not point the tool at co-workers or yourself at any time. No horseplay! Work safe! Respect the tool as a working implement. (Fig. J)
- Keep bystanders, children, and visitors away while operating a power tool. Distractions can cause you to lose control. When tool is not in use, it should be locked in a safe place, out of the reach of children.
- Remove finger from trigger when not driving fasteners. Never carry tool with finger on trigger. Accidental discharge could result. Using the trigger lock-off will prevent accidental discharge.
- Do not overreach. Maintain proper footing and balance at all times. Loss of balance may cause cause personal injury. (Fig. K)
- Make sure hose is free of obstructions or snags. Entangled or snarled hoses can cause loss of balance or footing.
- Use the tool only for its intended use. Do not discharge fasteners into open air, concrete, stone, extremely hard woods, knots or any material too hard for the fastener to penetrate. Do not use the body of the tool or top cap as a hammer. Discharged fasteners may follow unexpected path and cause injury. (Fig. L)
- Always keep fingers clear of contact trip to prevent injury from inadvertent release of nails. (Fig. M)
- Refer to the Maintenance and Repairs sections for detailed information on the proper maintenance of the tool
- Always operate the tool in a clean, lighted area. Be sure the work surface is clear of any debris and be careful not to lose footing when working in elevated environments such as rooftops.
- Do not drive fasteners near edge of material. The workpiece may split causing the fastener to ricochet, injuring you or a co-worker. Be aware that the nail may follow the grain of the wood (shiner), causing it to protrude unexpectedly from the side of the work material. Drive the nail perpendicular to the grain to reduce risk of injury. (Fig. N)
- Do not drive nails onto the heads of other fasteners or with the tool at too steep an angle. Personal injury from strong recoil, jammed fasteners, or ricocheted nails may result. (Fig. O)
- Be aware of material thickness when using the nailer. A protruding nail may cause injury.
- Be aware that when the tool is being utilized at pressures on the high end of its operating range, nails can be driven completely through thin or very soft work material. Make sure the pressure in the compressor is set so that nails are set into the material and not pushed completely through. (Fig. P)
- Keep hands and body parts clear of immediate work area. Hold workpiece with clamps when necessary to keep hands and body out of potential harm. Be sure the workpiece is properly secured before pressing the nailer against the material. The contact trip may cause the work material to shift unexpectedly. (Fig. Q)
- Do not use tool in the presence of flammable dust, gases or fumes. The tool may produce a spark that could ignite gases causing a fire. Driving a nail into another nail may also cause a spark. (Fig. R)
- Keep face and body parts away from back of the tool cap when working in restricted areas. Sudden recoil can result in impact to the body, especially when nailing into hard or dense material. (Fig. S)
- Grip tool firmly to maintain control while allowing tool to recoil away from work surface as fastener is driven. In "Contact Actuation Mode" if contact trip is allowed to recontact work surface before trigger is released an unwanted fastener will be fired.
- Choice of triggering method is important. Check the manual for triggering options.
- When using the contact action trigger, be careful of unin tentional double fires resulting from tool recoil. Unwanted fasteners may be driven if the contact trip is allowed to accidentally re-contact the work surface. (Fig. T)
TO AVOID DOUBLE FIRES:
- Do not engage the tool against the work surface with a strong force.
- Allow the tool to recoil fully after each actuation.
- Use sequential action trigger.
- When "contact" actuating the nailer, always keep tool in control. Inaccurate placement of tool can result in misdirected discharge of a fastener.
SEQUENTIAL ACTION TRIGGER
- When using the sequential action trigger, do not actuate the tool unless the tool is placed firmly against the workpiece.
- Do not drive nails blindly into walls, floors or other work areas. Fasteners driven into live electrical wires, plumbing, or other types of obstructions can result in injury. (Fig. U)
- Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use tool while tired or under the influence of drugs, alcohol, or medication. A moment of inattention while operating power tools may result in serious personal injury.
- DEPTH ADJUSTMENT: To reduce risk of serious injury from accidental actuation when attempting to adjust depth, ALWAYS;
- Disconnect air supply
- Avoid contact with trigger during adjustments
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:
- lead from lead-based paints,
- crystalline silica from bricks and cement and other masonry products, and
- arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.
ALWAYS USE SAFETY GLASSES. Everyday eyeglasses are NOT safety glasses. Also use face or dust mask if operation is dusty. ALWAYS WEAR CERTIFIED SAFETY EQUIPMENT:
- ANSI Z87.1 eye protection (CAN/CSA/Z94.3),
- ANSI S12.6 (S3.19) hearing protection,
- NIOSH/OSHA/MSHA respiratory protection.
SAVE ALL WARNINGS AND INSTRUCTIONS
FOR FUTURE REFERENCE
Specifications
MODEL | DW66C-1 |
HEIGHT | 11-5/8" (295.3 mm) |
WIDTH | 4-5/8" (117.5 mm) |
LENGTH | 10-1/2" (266.7 mm) |
WEIGHT | 4.9 lb (2.2 kg) |
MAGAZINE ANGLE | 15° |
OPERATING PRESSURE | 70 – 120 psig (4.9 – 8.43 kg/cm2 ) |
AIR CONSUMPTION PER 100 CYCLES * | 3.3 cfm (.093 m3) @ 80 psi (5.62 kg/cm2) |
LOADING CAPACITY | Up to 300–350 Nails |
FASTENER LENGTHS | 1-1/4"–2-1/2" (531 mm - 63 mm) |
*Take the actual rate at which the tool will be run to determine the amount of air required. For instance, if your fastener usage averages 50 nails per minute, you need 50% of the tool's cfm which is required to operate the tool at 100 nails per minute.
COMPONENTS
- Trigger
- Exhaust
- Rafter hook
- Contact trip
- Magazine latch
- Magazine
- No-Mar pad
- Depth adjustment dial
OPERATION
Read the section titled Important Safety Instructions at the beginning of this manual. Always wear eye and ear protection when operating this tool. Keep the nailer pointed away from yourself and others. For safe operation, complete the following procedures and checks before each use of the nailer.
- Before you use the nailer, be sure that the compressor tanks have been properly drained.
- Lubricate the tool following these directions:
- Use DEWALT pneumatic tool oil or a non-detergent S.A.E. 20 weight oil. DO NOT use detergent oil or additives as they will damage o-rings and rubber parts.
- Use a filter-regulator-lubricator in the air line between the compressor and the tool when possible.
- If a lubricator is not available, add 5 to 10 drops of oil in the air fitting a least twice a day or every 4 hours of use.
- Wear proper eye, hearing and respiratory protection.
- Remove all fasteners from the magazine.
- Check for smooth and proper operation of contact trip and pusher assemblies. Do not use tool if either assembly is not functioning properly. NEVER use a tool that has the contact trip restrained in the up position.
- Check air supply. Ensure that air pressure does not exceed recommended operating limits, refer to Tool Specifications.
- Connect air hose.
- Check for audible leaks around valves and gaskets. Never use a tool that leaks or has damaged parts.
To reduce the risk of personal injury, disconnect tool from air supply before performing maintenance, clearing a jammed fastener, leaving work area, moving tool to another location or handing the tool to another person.
Trigger
Always wear proper eye [ANSI Z87.1 (CAN/CSA Z94.3)] and hearing protection [ANSI S12.6 (S3.19)] when operating this tool.
The operator must not hold the trigger pulled on contact trip tools except during fastening operation, as serious injury could result if the trip accidentally contacted someone or something, causing the tool to cycle.
Keep hands and body away from the discharge area of the tool. A contact trip tool may bounce from the recoil of driving a fastener and an unwanted second fastener may be driven, possibly causing injury.
Never use rafter hook to hang tool from body, clothing or belt.
The common operating procedure on "Contact Trip" tools is for the operator to contact the work to actuate the trip mechanism while keeping the trigger pulled, thus driving a fastener each time the work is contacted. This will allow rapid fastener placement on many jobs, such as sheathing, decking and pallet assembly. All pneumatic tools are subject to recoil when driving fasteners. The tool may bounce, releasing the trip, and if unintentionally allowed to recontact the work surface with the trigger still actuated (finger still holding trigger pulled) an unwanted second fastener will be driven.
SEQUENTIAL TRIP (GRAY TRIGGER)
The Sequential Trip requires the operator to hold the tool against the work before pulling the trigger. This makes accurate fastener placement easier, for instance on framing, toe nailing and crating applications.
The Sequential Trip allows exact fastener location without the possibility of driving a second fastener on recoil, as described under Contact Trip.
The Sequential Trip Tool has a positive safety advantage because it will not accidentally drive a fastener if the tool is contacted against the work – or anything else – while the operator is holding the trigger pulled.
When using the contact trip (black) trigger the tool contains a contact trip that operates in conjunction with the trigger to drive a fastener.
There are two methods of operation to drive fasteners with a contact trip tool.
SINGLE FASTENER PLACEMENT: To operate the tool in this manner, first position the contact trip on the work surface, WITHOUT PULLING THE TRIGGER. Depress the contact trip until the nose touches the work surface and then pull the trigger to drive a fastener. Do not press the tool against the work with extra force. Instead, allow the tool to recoil off the work surface to avoid a second unwanted fastener. Remove your finger from the trigger after each operation.
RAPID FASTENER OPERATION: To operate the tool in this manner, hold the tool with the contact trip pointing towards but not touching the work surface. Pull the trigger and then tap the contact trip against the work surface using a bouncing motion. Each depression of the contact trip will cause a fastener to be driven.
SEQUENTIAL TRIP OPERATION (GRAY TRIGGER)
When using the sequential trip (gray) trigger the tool contains a contact trip that operates in conjunction with the trigger to drive a fastener. To operate a sequential trip tool, first position the contact trip on the work surface
WITHOUT PULLING THE TRIGGER. Depress the contact trip and then pull the trigger to drive a fastener. As long as the contact trip is contacting the work and is held depressed, the tool will drive a fastener each time the trigger is depressed. If the contact trip is allowed to leave the work surface, the sequence described above must be repeated to drive another fastener.
Remove all fasteners from tool before performing tool operation check.
- With finger off the trigger (A), press the contact trip against the work surface.
THE TOOL MUST NOT CYCLE. - Hold the tool off the work surface, and pull the trigger.
THE TOOL MUST NOT CYCLE. - With the tool off the work surface, pull the trigger. Press the contact trip against the work surface.
THE TOOL MUST CYCLE. - Without touching the trigger, press the contact trip against the work surface, then pull the trigger.
THE TOOL MUST CYCLE.
SEQUENTIAL TRIP OPERATION (GRAY TRIGGER)
- Press the contact trip against the work surface, without touching the trigger.
THE TOOL MUST NOT CYCLE. - Hold the tool off the work surface and pull the trigger.
THE TOOL MUST NOT CYCLE.
Release the trigger. The trigger must return to the trigger stop on the frame. - Pull the trigger and press the contact trip against the work surface.
THE TOOL MUST NOT CYCLE. - With finger off the trigger, press the contact trip against the work surface. Pull the trigger.
THE TOOL MUST CYCLE.
Keep tool pointed in a safe direction when loading nails.
Never load nails with the contact trip or trigger activated.
- Open the magazine (F). Pull down magazine latch (E) and swing door/magazine cover outward. Refer to Figure 4.
- The nailer must be set for the length of nail to be used. Nails will not feed smoothly if the magazine is not correctly adjusted. The magazine contains an adjustable nail platform on which the nail coil rests. The nail platform can be moved up and down to three nail settings.
To change setting pull up on the post and twist to the correct step Refer to Figure 5.
1-1/4" - 1-1/2" (32–38 mm) nails | upper step |
1-3/4" - 2" (45–50 mm) nails | middle step |
2-1/4" - 2-1/2" (57–64 mm) nails | bottom step |
- Load the coil of nails, refer to Tool Specifications to determine appropriate fastener.
Place the coil of nails over the post in the magazine. Uncoil enough nails to reach the feed pawl. Place the first nail in front of the front tooth on the feed pawl, in the driver channel. The nail heads must be in the slot in the nose. Refer to Figure 6.
- Swing cover closed. To aid in the feeding of plastic collated nails the tab on the cover should be repositioned. To do so apply pressure to the top center of the tab and simultaneously apply pressure to the bottom outer edge of the tab until it rests on the top outer brim of the cover. Swing the door/magazine cover closed. Check that the latch engages when released. (If it does not engage, check that the nail heads are in the slot in the nose.)
- Removal of plastic strip. As nails are driven, the plastic strip will feed out of the tool. When sufficient strip has been fed out, it can be torn away by pulling against the tear edge in the nose. Refer to Figure 7.
Depth Setting
Disconnect air line from tool and remove fasteners from magazine before making adjustments or personal injury may result.
The fastener depth control adjustment feature provides control of the nail drive depth from flush with or just above the work surface to shallow or deep countersink.
Rotate depth control adjustment wheel (H) to give the desired depth of drive.
Rafter Hook
The integrated rafter hook (C) can be rotated to either side of the tool to accommodate left- or right-handed users. NOTE: The rafter hook can not be removed.
Cold Weather Operation
Read the section titled Important Safety Instructions at the beginning of this manual. Always wear eye and ear protection when operating this tool. Keep the nailer pointed away from yourself and others. For safe operation, complete the following procedures and checks before each use of the nailer.
When operating tools at temperatures below freezing, complete preparation procedures outlined above and follow the directions below.
- Make sure compressor tanks have been properly drained prior to use. Always drain the compressor tanks at least once daily while using the nailer. This is especially important in cold weather because any moisture in the air in the tanks will condense in the cold temperature.
- Keep the tool as warm as possible prior to use.
- Put 5 to 10 drops of DEWALT Pneumatic Tool Oil or winter weight pneumatic oil containing ethylene glycol in the end cap.
- Lower air pressure to 80 psi or less.
- Actuate the tool 5 or 6 times into scrap lumber to lubricate o-rings.
- Turn pressure up to operating level (not to exceed 120 psi) and use tool as normal.
- Re-lubricate with DEWALT Pneumatic Tool Oil or winter weight pneumatic oil containing ethylene glycol in the end cap at least twice a day or after 4 hours of use.
Hot Weather Operation
Tool should operate normally. However, keep tool out of direct sunlight as excessive heat can damage bumpers, o-rings and other rubber parts.
MAINTENANCE
Disconnect air line from tool and remove fasteners from magazine before making adjustments or personal injury may result.
Daily Maintenance Chart
ACTION | Lubricate tool with 5-10 drops of D E WALT Pneumatic Tool Oil |
WHY | Prevents failure of o-rings |
HOW | Insert drops into air fitting on end cap of tool |
ACTION | Drain compressor tanks and hoses daily |
WHY | Prevents accumulation of moisture in compressor and nailer |
HOW | Open petcocks or other drain valves on compressor tanks. Allow any accumulated water to drain from hoses |
ACTION | Clean magazine, pusher, and contact trip mechanism |
WHY | Permits smooth operation, reduces wear, and prevents jams |
HOW | Blow clean with compressed air. The use of oils or solvents is not recommended as they tend to attract debris |
ACTION | Before each use, check to ensure all screws, nuts and fasteners are tight and undamaged |
WHY | Prevents jams, leaks and premature failure of tool parts |
HOW | Tighten loose screws or other fasteners using the appropriate hex wrench or screwdriver |
Cleaning
Blow dirt and dust out of all air vents with clean, dry air at least once a week. To minimize the risk of eye injury, always wear ANSI Z87.1 approved eye protection when performing this.
Never use solvents or other harsh chemicals for cleaning the non-metallic parts of the tool. These chemicals may weaken the plastic materials used in these parts. Use a cloth dampened only with water and mild soap. Never let any liquid get inside the tool; never immerse any part of the tool into a liquid.
Repairs
To reduce the risk of serious personal injury, remove nails from magazine before making any adjustments or servicing this tool.
Refer to the Troubleshooting Guide at the end of this section.
To assure product SAFETY and RELIABILITY, repairs, maintenance and adjustment should be performed by a DeWalt factory service center, a DeWalt authorized service center or other qualified service personnel. Always use identical replacement parts.
Accessories
Since accessories, other than those offered by DEWALT, have not been tested with this product, use of such accessories with this tool could be hazardous. To reduce the risk of injury, only DEWALT, recommended accessories should be used with this product.
Recommended accessories for use with your tool are available at extra cost from your local dealer or authorized service center.
If you need assistance in locating any accessory, please contact DEWALT Industrial Tool Co., 701 East Joppa Road, Towson, MD 21286, call 1-800-4-DEWALT (1-800-433-9258) or visit our website www.dewalt.com.
Register Online
Thank you for your purchase. Register your product now for:
- WARRANTY SERVICE: Registering your product will help you obtain more efficient warranty service in case there is a problem with your product.
- CONFIRMATION OF OWNERSHIP: In case of an insurance loss, such as fire, flood or theft, your registration of ownership will serve as your proof of purchase.
- FOR YOUR SAFETY: Registering your product will allow us to contact you in the unlikely event a safety notification is required under the Consumer Product Safety Act. Register online at www.dewalt.com/register.
TROUBLESHOOTING GUIDE
MANY COMMON PROBLEMS CAN BE SOLVED EASILY BY UTILIZING THE CHART BELOW. FOR MORE SERIOUS OR PERSISTENT PROBLEMS, CONTACT A D E WALT SERVICE CENTER OR CALL 1-(800)-4-D E WALT.
To reduce the risk of serious personal injury, remove fasteners from magazine before making any adjustments or servicing this tool.
SYMPTOM | CAUSE | FIX |
Trigger valve housing leaks air | O-ring cut or cracked | Replace O-ring |
Trigger valve stem leaks air | O-ring/seals cut or cracked | Replace trigger valve assembly |
Frame/nose leaks air | Loose nose screws | Tighten and recheck |
O-ring or Gasket is cut or cracked | Replace O-ring or gasket |
Bumper cracked/worn | Replace bumper |
Frame/cap leaks air | Damaged gasket or seal | Replace gasket or seal |
Cracked/worn head valve bumper | Replace bumper |
Loose cap screws | Tighten and recheck |
Failure to cycle | Air supply restriction | Check air supply equipment |
Tool dry, lack of lubrication | Use DEWALT pneumatic tool oil |
Worn head valve O-rings | Replace O-rings |
Broken cylinder cap spring | Replace cylinder cap spring |
Head valve stuck in cap | Disassemble/Check/Lubricate |
Lack of power; slow to cycle | Tool dry, lacks lubrication | Use DEWALT pneumatic tool oil |
Broken cylinder cap spring | Replace cap spring |
O-rings/seals cut or cracked | Replace O-rings/seals |
Exhaust blocked | Check bumper, head valve spring, muffler |
Trigger assembly worn/leaks | Replace trigger assembly |
Dirt/tar build up on driver | Disassemble nose/driver to clean |
Cylinder sleeve not seated correctly on bottom bumper | Disassemble to correct |
Head valve dry | Disassemble/lubricate |
Air pressure too low | Check air supply equipment |
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