Maintenance; Optional Accessory - DeWalt DCD999 Instruction Manual

English
• Large holes (5/16" to 1/2" [7.9 mm to 12.7 mm]) in steel
can be made easier if a pilot hole (5/32" to 3/16" [4 mm to
4.8 mm]) is drilled first.
• If drilling thin material or material that is prone to
splinter, use a wood "back-up" block to prevent damage to
the workpiece.
Hammerdrilling
iMPORTAnT: Use carbide-tipped or masonry bits rated for
percussion drilling only.
1. Select the desired speed/torque range using the
speed selector 8 to match the speed and torque to the
planned operation. Turn the mode selection collar
hammerdrill symbol.
2. Pull the trigger, applying just enough pressure on the
hammer to keep it from bouncing excessively or "rising" off
the bit.
Recommendations for hammerdrilling
• Too much force will cause slower drilling speeds,
overheating, and a lower drilling rate.
• A smooth even flow of material indicates the proper
drilling rate.
• Drill straight, keeping the bit at a right angle to the
work. Do not exert side pressure on the bit when drillling
as this will cause clogging of the bit flutes and a slower
drilling speed.
• When drilling deep holes, if the hammer speed starts to
drop off, pull the bit partially out of the hole with tool still
running to help clear debris from the hole.

MAINTENANCE


WARNING: To reduce the risk of serious personal
injury, turn unit off and remove the battery pack
before making any adjustments or removing/installing
attachments or accessories. An accidental start‑up can
cause injury.
Cleaning

WARNING: 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 procedure.

WARNING: 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.
Accessories

WARNING: Since accessories, other than those offered by
D WALT, have not been tested with this product, use of such
e
accessories with this tool could be hazardous. To reduce the
risk of injury, only D WALT recommended accessories should
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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 D
(1-800-433-9258) or visit our website: www.dewalt.com.
8
5
WALT; call 1-800-4-D WALT
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Tool Connect™ Chip (Fig. F)

WARNING: To reduce the risk of injury, remove
accessories from the tool chuck before any Tool
Connect™ interaction.
Your tool is Tool Connect™ Chip ready and has a location for
installation of a Tool Connect™ Chip.
Tool Connect™ Chip is an optional application for your
smart device (such as a smart phone or tablet) that connects
the device to utilize the mobile application for inventory
management functions.
Refer to Tool Connect™ Chip Instruction Sheet for
more information.
to the
installing the Tool Connect™ Chip
1. Remove the retaining screws
Connect™ Chip protective cover
2. Remove the protective cover and insert the Tool
Connect™ Chip into the empty pocket
3. Ensure that the Tool Connect™ Chip is flush with the
housing. Secure it with the retaining screws and tighten the
screws.
4. Refer to Tool Connect™ Chip Instruction Sheet for
further instructions.
Belt Hook and Bit Clip (Fig. A)

Optional Accessory


WARNING: To reduce the risk of serious personal
injury, ONLY use the tool's belt hook to hang the tool
from a work belt. DO NOT use the belt hook for tethering
or securing the tool to a person or object during use. DO NOT
suspend tool overhead or suspend objects from the belt hook.

WARNING: To reduce the risk of serious personal
injury, ensure the screw holding the belt hook is secure.
iMPORTAnT: When attaching or replacing the belt hook or
bit clip, use only the screw
securely tighten the screw.
The belt hook
either side of the tool using only the screw
accommodate left- or right-handed users. If the belt hook
or bit clip is not desired at all, they can be removed from
the tool.
To move the belt hook or bit clip, remove the screw that
holds it in place then reassemble on the opposite side. Be
sure to securely tighten the screw.
Repairs
The charger and battery pack are not serviceable. There are
no serviceable parts inside the charger or battery pack.

WARNING: To assure product SAFETY and RELIABILITY,
repairs, maintenance and adjustment (including brush
inspection and replacement, when applicable) should
be performed by a D
D WALT authorized service center. Always use identical
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replacement parts.
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
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ownership will serve as your proof of purchase.
16 that hold the Tool
17 into the tool.
12 that is provided. Be sure to
and bit clip can be attached to
11 13
WALT factory service center or a
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18 .
provided, to
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