DeWalt XR LI-ION DCD999 Original Instructions Manual page 14

English
Proper hand position requires one hand on the main
handle ( 15 ), with the other hand on the side handle ( 14 ) to
control the twisting action of the drill.
Screwdriver Operation (Fig. A)
1. Select the desired speed/torque range using the
three‑speed gear shifter
the torque adjustment collar
gear shifter to speed 2 or 3. This ensures effective control
over the fastener allowing the screw to be seated correctly
and set to specification. Speed 1 will provide the same
clutching torque as speeds 2 and 3. However, for optimum
performance of the electronic clutch, speeds 2 and
3 are preferred.
nOTE: Use the lowest torque setting (1) first and increase
the number through to the highest setting (11) to seat the
fastener at the desired depth. The lower the number, the
lower the torque output.
2. Reset the torque adjustment collar
number setting for the torque desired. Make a few practice
runs in scrap or unseen areas to determine the proper
position of the torque adjustment collar.
nOTE: The torque adjustment collar may be set to any number
at any time.
Drill Operation (Fig. A)

WARNING: TO REDUCE THE RISK OF PERSONAL
INJURY, ALWAYS ensure workpiece is anchored or
clamped firmly. If drilling thin material, use a wood "back‑
up" block to prevent damage to the material.
1. Select the desired speed/torque range using the gear
shifter 8 to match the speed and torque to the planned
operation. Set the torque adjustment collar
drill symbol.
2. For WOOD, use twist bits, spade bits, power auger bits or
hole saws. For METAL, use high‑speed steel twist drill bits
or hole saws. Use a cutting lubricant when drilling metals.
The exceptions are cast iron and brass which should be
drilled dry.
3. Always apply pressure in a straight line with the bit. Use
enough pressure to keep the drill bit biting, but do not push
hard enough to stall the motor or deflect the bit.
4. Hold tool firmly with both hands to control the twisting
action of the drill.
5. iF DRill sTAlls, it is usually because it is being
overloaded. RElEAsE TRiggER iMMEDiATElY, remove
drill bit from work, and determine cause of stalling. DO
nOT CliCK TRiggER OFF AnD On in An ATTEMPT
TO sTART A sTAllED DRill – This CAn DAMAgE
ThE DRill.
6. Keep the motor running when pulling the bit back out of a
drilled hole. This will help prevent jamming.
Hammerdrill Operation (Fig. A)
1. Select the desired speed/torque range using the gear
shifter 8 to match the speed and torque to the planned
operation. Set the torque adjustment collar
hammer symbol.
12
8 on the top of the tool. If using
5 , initially set the three‑speed
5 to the appropriate
5 to the
5 to the
2. When drilling, use just enough force on the hammer to
keep it from bouncing excessively. Prolonged and too much
force on the hammer will cause slower drilling speeds and
potential overheating.
3. Drill straight, keeping the bit at a right angle to the work. Do
not exert side pressure on the bit when drilling as this will
cause clogging of the bit flutes and a slower drilling speed.
4. When drilling deep holes, if the hammer speed starts to
drop off, pull the bit partially out of the hole with the tool
still running to help clear debris from the hole.
5. For masonry, use carbide‑tipped bits or masonry bits. A
smooth, even flow of dust indicates the proper drilling rate.
MAINTENANCE
Your power tool has been designed to operate over a long
period of time with a minimum of maintenance. Continuous
satisfactory operation depends upon proper tool care and
regular cleaning.

WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack
before making any adjustments or removing/
installing attachments or accessories. An accidental
start‑up can cause injury.
The charger and battery pack are not serviceable.
C
Lubrication
Your power tool requires no additional lubrication.
D
Cleaning

WARNING: Blow dirt and dust out of the main housing
with dry air as often as dirt is seen collecting in and around
the air vents. Wear approved eye protection and approved
dust mask 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 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.
Optional Accessories

WARNING: Since accessories, other than those offered
by D WALT, have not been tested with this product, use
e
of such accessories with this tool could be hazardous.
To reduce the risk of injury, only D
accessories should be used with this product.
Consult your dealer for further information on the
appropriate accessories.
WALT recommended
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