DEWALT DCF899 / DCF899H 20V Max* Cordless Impact Wrench

Definitions: Safety Guidelines

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION: 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.

For questions or comments, call 1-800-4-DEWALT (1-800-433-9258).

General Power Tool Safety Warnings

WARNING! Read all safety warnings and instructions. Failure to follow warnings and instructions may result in electric shock, fire, and/or serious injury.

1) WORK AREA SAFETY

• Keep work area clean and well lit.
• Do not operate power tools in explosive atmospheres (e.g., presence of flammable liquids, gases, or dust).
• Keep children and bystanders away.

2) ELECTRICAL SAFETY

• Ensure power tool plugs match the outlet.
• Avoid body contact with earthed or grounded surfaces.
• Do not expose power tools to rain or wet conditions.
• Do not abuse the cord; keep it away from heat, oil, sharp edges, and moving parts.
• Use outdoor extension cords for outdoor use.
• Use a Ground Fault Circuit Interrupter (GFCI) protected supply in damp locations.

3) PERSONAL SAFETY

• Stay alert, watch what you are doing, and use common sense. Do not use when tired or under the influence of drugs, alcohol, or medication.
• Use personal protective equipment (PPE): always wear eye protection. Use dust masks, safety shoes, hard hats, or hearing protection as appropriate.
• Prevent unintentional starting: ensure the switch is OFF before connecting to power or battery pack.
• Remove any adjusting key or wrench before turning the tool on.
• Do not overreach; maintain proper footing and balance.
• Dress properly: do not wear loose clothing, jewelry, or long hair that can be caught in moving parts.
• Ensure dust extraction and collection facilities are connected and used properly.

4) POWER TOOL USE AND CARE

• Do not force the power tool; use the correct tool for the application.
• Do not use a tool if the switch is defective.
• Disconnect the plug/battery pack before making adjustments or changing accessories.
• Store idle tools out of reach of children and untrained users.
• Maintain power tools: check for misalignment, binding, or breakage. Have damaged tools repaired before use.
• Keep cutting tools sharp and clean.
• Use tools and accessories according to instructions, considering working conditions.

5) BATTERY TOOL USE AND CARE

• Recharge only with the specified charger.
• Use power tools only with specifically designated battery packs.
• Keep battery packs away from metal objects (paper clips, coins, keys) to prevent short circuits.
• Avoid contact with battery liquid if ejected; flush with water if contact occurs.

6) SERVICE

• Have power tools serviced by qualified personnel using identical replacement parts.

Additional Specific Safety Rules

• Hold tool by insulated gripping surfaces when fastener may contact hidden wiring.
• Use clamps or other practical means to secure and support the workpiece.
• Wear safety goggles or other eye protection.
• Accessories and tools get hot during operation; wear gloves.
• Avoid air vents covering moving parts.
• Do not operate for long periods; vibration can be harmful. Use gloves and take breaks.
• WARNING: ALWAYS use safety glasses (not eyeglasses). Use face/dust mask if dusty. Wear certified safety equipment: ANSI Z87.1 eye protection, ANSI S12.6 hearing protection, NIOSH/OSHA/MSHA respiratory protection.
• WARNING: Some dust contains chemicals known to cause cancer, birth defects, or reproductive harm (e.g., lead, crystalline silica, arsenic, chromium). Reduce exposure by working in ventilated areas and using approved safety equipment.
• WARNING: Use NIOSH/OSHA approved respiratory protection. Direct particles away from face and body.
• WARNING: ALWAYS wear proper hearing protection (ANSI S12.6).
• CAUTION: When not in use, place tool on its side on a stable surface to prevent tripping hazards.
• Tool labels may include symbols: V (volts), A (amperes), Hz (hertz), W (watts), min (minutes), AC (alternating current), DC (direct current), AC/DC (alternating or direct current), no (no load speed), n (rated speed), /min (per minute), BPM (beats per minute), IPM (impacts per minute), RPM (revolutions per minute), SPM (strokes per minute), sfpm (surface feet per minute).

Important Safety Instructions for All Battery Packs

• Do not charge or use battery packs in explosive atmospheres.
• NEVER force a battery pack into a charger. Do not modify battery packs.
• Charge battery packs only in designated DEWALT chargers.
• Do not splash or immerse battery packs in water or other liquids.
• Do not store or use in temperatures exceeding 40°C (105°F). Store in a cool, dry location.
• NOTE: Do not store battery packs in a tool with the trigger locked ON.
• WARNING: Fire hazard. Never attempt to open battery packs. Do not use if case is cracked or damaged. Do not crush, drop, or damage battery packs.
• WARNING: Fire hazard. Do not store or carry battery packs where metal objects can contact terminals (e.g., in pockets with loose nails/screws).
• Specific Safety Instructions for Lithium Ion (Li-Ion):
  • Do not incinerate battery packs.
  • If battery contents contact skin, wash immediately with soap and water. If in eyes, rinse with water for 15 minutes.
  • Contents of opened cells may cause respiratory irritation; provide fresh air.
  • WARNING: Burn hazard. Battery liquid may be flammable.
• The RBRC™ Seal indicates DEWALT has paid for battery recycling costs. Return spent batteries to authorized DEWALT service centers or retailers for recycling.

Important Safety Instructions for All Battery Chargers

• Save these instructions.
• Before using the charger, read all instructions and cautionary markings.
• WARNING: Shock hazard. Do not allow liquid inside the charger.
• CAUTION: Burn hazard. Charge only DEWALT rechargeable battery packs.
• NOTICE: Keep foreign conductive material away from charger cavities. Unplug charger when no battery pack is inserted and before cleaning.
• Do not attempt to charge with other chargers.
• Do not expose charger to rain or snow.
• Pull by the plug, not the cord, when disconnecting.
• Ensure cord is not a tripping hazard.
• Use extension cords only if necessary and ensure they are properly sized (AWG).
• Provide a dry location and use an outdoor-rated extension cord when operating outdoors.
• Do not place objects on the charger or block ventilation slots.
• Do not operate with a damaged cord or plug.
• Do not operate if charger has been dropped or damaged.
• Do not disassemble the charger; take to an authorized service center.
• Disconnect charger before cleaning.
• NEVER connect two chargers together.
• Charger is designed for standard 120V household power.

Product Components & Identification

DCF899 / DCF899H Components (Fig. 1, 2, 3)

Textual description of Fig. 1: The DEWALT DCF899/DCF899H impact wrench is shown with labeled components: A. Trigger switch, B. Forward/reverse button, C. Anvil, D. Main handle, E. Battery release button, F. Battery pack, G. Worklight, H. Detent pin (for DCF899), I. Hog ring (for DCF899H), J. Speed selector.

Textual description of Fig. 2: Illustrates the anvil (C) with a detent pin (H) for securing accessories.

Textual description of Fig. 3: Illustrates the anvil (C) with a hog ring (I) for securing accessories.

Intended Use

This impact wrench is designed for professional impact fastening applications in wood, metal, and concrete. Do not use in wet conditions or in the presence of flammable liquids or gases.

Operation

Installing and Removing the Battery Pack (Fig. 5)

Textual description of Fig. 5: Shows how to slide the battery pack (F) into the tool handle until it clicks, and how to press the release button (E) to remove it.

To install, align the battery pack with the handle's rails and slide until firmly seated. To remove, press the release button (E) and pull the pack out. Squeeze the trigger for three seconds to dissipate residual charge.

Fuel Gauge Battery Packs (Fig. 6)

Textual description of Fig. 6: Depicts a battery pack with a fuel gauge button (K) and three green LED lights indicating the remaining charge level.

Press button (K) to check charge. If no lights illuminate, the battery needs recharging.

Proper Hand Position (Fig. 7)

Textual description of Fig. 7: Illustrates the correct grip for operating the tool, with one hand on the main handle (D) and the other supporting the tool.

Always hold securely in anticipation of sudden reaction. Use proper hand position as shown.

Variable Speed Trigger Switch (Fig. 1)

Squeeze trigger (A) to turn the tool on; release to turn off. The tool has a brake that stops the anvil when the trigger is released. Variable speed allows selection of the best speed for the application.

Forward/Reverse Control Button (Fig. 1)

Button (B) determines rotation direction and serves as a lock-off. Press button on the right for forward, left for reverse. The center position locks the tool OFF. Ensure trigger is released before changing button position.

Worklight (Fig. 1)

The worklight (G) on the tool's foot activates when the trigger is squeezed and turns off 20 seconds after release. It is for lighting the immediate work surface.

Speed Selector (Fig. 1)

The speed selector (J) allows choosing one of three speeds:

• Speed 1: 0-400 rpm
• Speed 2: 0-1200 rpm
• Speed 3: 0-1900 rpm

Anvils (Fig. 2, 3)

WARNING: Use only impact accessories. Non-impact accessories may break.

Inspect anvils, detent pins, and hog rings before use. Replace any missing or damaged items. Place the switch in the locked-off position or remove the battery pack before changing accessories.

Anvil with Detent Pin (Fig. 2) - DCF899

To install an accessory, align its hole with the detent pin (H) on the anvil (C) and press until engaged. To remove, depress the detent pin and pull the accessory off.

Anvil with Hog Ring (Fig. 3) - DCF899H

To install an accessory, push it firmly onto the anvil (C). The hog ring (I) compresses and then applies pressure for retention. To remove, grasp and pull the accessory firmly.

Usage

Torque Specifications

Your impact tool can generate the following maximum torque:

CAUTION: Ensure fastener and/or system can withstand the torque generated. Excessive torque may cause breakage and injury.

1. Place accessory on fastener head, keeping tool pointed straight.

2. Press switch to start, release to stop. Always check torque with a torque wrench.

Factors affecting fastening torque include: voltage, accessory size, bolt size/grade, bolt condition (rust/debris), material type/finish, and fastening time.

Maintenance

Cleaning

WARNING: Blow dirt and dust from air vents with clean, dry air weekly. Wear ANSI Z87.1 eye protection.

WARNING: Do not use solvents or harsh chemicals on non-metallic parts. Use a damp cloth with mild soap and water. Never let liquid enter the tool or immerse any part in liquid.

Charger Cleaning Instructions

WARNING: Shock hazard. Disconnect charger from AC outlet before cleaning. Clean exterior with a cloth or soft non-metallic brush. Do not use water or cleaning solutions.

Accessories

WARNING: Use only DEWALT recommended accessories. Use of other accessories may be hazardous.

Recommended accessories are available at extra cost from your local service center or DEWALT website.

Repairs

Chargers and battery packs are not serviceable. For safety and reliability, repairs should be performed by a DEWALT factory service center, authorized service center, or qualified service personnel using identical replacement parts.

Warranty & Registration

Register Online

Register your product at www.dewalt.com/register for warranty service, confirmation of ownership, and safety notifications.

Three Year Limited Warranty

DEWALT will repair defects due to faulty materials or workmanship for three years from purchase date, free of charge. Warranty does not cover normal wear or tool abuse. Visit www.dewalt.com or call 1-800-4-DEWALT for details.

Free Service

• 1 Year Free Service: DEWALT maintains the tool and replaces worn parts for free for one year.
• 2 Years Free Service on DEWALT Battery Packs: Lists specific battery models.
• 3 Years Free Service on DEWALT Battery Packs: Lists specific battery models.

90 Day Money Back Guarantee

If not completely satisfied, return within 90 days with receipt for a full refund.

Free Warning Label Replacement

Call 1-800-4-DEWALT for free replacement labels.

Battery and Charger Information

Battery and Charger Compatibility

A comprehensive compatibility chart lists DEWALT battery part numbers (e.g., DC9360, DCB200, DCB120, DC9071) and their corresponding output voltages (e.g., 36V, 20V, 12V, 18V). It cross-references these batteries with various DEWALT chargers (e.g., DCB101, DCB112, DC9310) and indicates compatible chargers with approximate charge times in minutes. Chargers marked with 'X' are not compatible with the listed battery.

Charging Procedure (Fig. 4)

Textual description of Fig. 4: Shows the charging process: 1. Plug charger into an outlet. 2. Insert battery pack (F) into charger; red light blinks (charging). 3. Red light stays solid (charged).

1. Plug the charger into an appropriate outlet before inserting the battery pack.
2. Insert the battery pack (F) into the charger, ensuring it is fully seated. The red charging light will blink continuously.
3. The red light remaining ON continuously indicates the charge is complete. The pack can be used or left in the charger.

Indicator Light Operation

Chargers DCB101, DCB107, DCB112:

• PACK CHARGING: Red light blinking (charging).
• PACK CHARGED: Red light solid ON.
• HOT/COLD DELAY: Red light blinks long, then short (DCB101) or red light blinks continuously with a yellow light illuminated (DCB107, DCB112). Charging is suspended until the battery reaches an optimal temperature.
• PROBLEM PACK OR CHARGER: Red light flashing rapidly. Re-insert battery or try another pack. If problem persists, have charger and pack tested.
• PROBLEM POWER LINE (DCB101): Red light flashes with two fast blinks followed by a pause, indicating power source is out of limits.

Wall Mounting

DCB107, DCB112 chargers can be wall-mounted. Locate within reach of an outlet and mount securely using appropriate screws.

Important Charging Notes

• For best results, charge when air temperature is between 18°C - 24°C (65°F - 75°F). Do NOT charge below +4.5°C (+40°F) or above +40.5°C (+105°F).
• Charger and battery pack may become warm during charging; this is normal.
• If battery pack does not charge properly, check receptacle, ensure receptacle is powered, move to an appropriate temperature location, or take the tool, pack, and charger to a service center.
• Recharge battery pack when it fails to produce sufficient power. Partially used packs can be recharged anytime.

Storage Recommendations

• Store in a cool, dry place away from direct sunlight and extreme temperatures.
• For long storage, store a fully charged battery pack in a cool, dry place, out of the charger.