DeWalt DCD790 - Page 23

ENGLISH
23
C
Lubrication
Your power tool requires no additionallubrication.
Drill Operation (Fig.E)

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. Turn the collar
3
to the drillsymbol.
2. Select the desired speed/torque range using the
gear shifter
4
to match the speed and torque to the
plannedoperation.
3. For WOOD, use twist bits, spade bits, power auger bits or
hole saws. For METAL, use high-speed steel twist drill bits or
Screwdriver Operation (Fig.D)
1. Select the desired speed/torque range using the dual
range gear selector to match the speed and torque of the
plannedoperation.
2. Turn the torque adjustment collar
3
to the desired position.
Lower numbers indicate lower torque settings; higher numbers
indicate higher torquesettings.
3. Insert the desired fastener accessory into the chuck as you
would any drillbit.
4. Make some practice runs in scrap or on unseen areas to
determine the proper position of the clutchcollar.
5. Always start with lower torque settings, then advance to
higher torque settings to avoid damage to the workpiece
orfastener.
Proper Hand Position (Fig.C)

WARNING: To reduce the risk of serious personal injury,
ALWAYS use proper hand position as shown.

WARNING: To reduce the risk of serious personal injury,
ALWAYS hold securely in anticipation of a suddenreaction.
Proper hand position requires one hand on the top of the drill as
shown, with the other hand on the main handle
15
.
OPERATION
Instructions for Use

WARNING: Always observe the safety instructions and
applicableregulations.

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.
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.
Hammerdrill Operation (Fig.F)
1. Turn the collar
3
to the hammerdrillsymbol.
2. Select the high speed setting by sliding the selector back
(away from thechuck).
IMPORTANT: Use carbide-tipped or masonry bitsonly.
3. Drill with just enough force on the hammer to keep it from
bouncing excessively or “rising” off the bit. Too much force will
cause slower drilling speeds, overheating and lower drillingrate.
4. 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.
5. When drilling deep holes, if the hammer speed starts to drop
off, pull the bit partially out of the hole with tool stil running to
help clear debris from thehole.
NOTE: A smooth, even flow of dust from the hole indicates
proper drillingrate.
hole saws. Use a cutting lubricant when drilling metals. The
exceptions are cast iron and brass which should be drilleddry.
4. Always apply pressure in a straight line with the bit. Use
enough pressure to keep drill biting, but do not push hard
enough to stall the motor or deflect thebit.
5. Hold tool firmly with both hands to control the twisting
action of the drill. If model is not equipped with side handle,
grip drill with one hand on the handle and one hand on the
batterypack.

CAUTION: Drill may stall if overloaded causing a sudden
twist. Always expect the stall. Grip the drill firmly to control the
twisting action and avoidinjury.
6. IF DRILL STALLS, it is usually because it is being overloaded
or improperly used. RELEASE TRIGGER IMMEDIATELY,
remove drill bit from work, and determine cause of stalling.
DO NOT CLICK TRIGGER ON AND OFF IN AN ATTEMPT
TO START A STALLED DRILL — THIS CAN DAMAGE
THEDRILL.
7. To minimize stalling or breaking through the material, reduce
pressure on drill and ease the bit through the last fractional part
of thehole.
8. Keep the motor running when pulling the bit back out of a
drilled hole. This will help preventjamming.
9. With variable speed drills there is no need to centre punch
the point to be drilled. Use a slow speed to start the hole and
accelerate by squeezing the trigger harder when the hole is
deep enough to drill without the bit skippingout.
any adjustments or removing/installing attachments
oraccessories.

WARNING: To reduce the risk of serious personal injury,
DO NOT suspend tool overhead or suspend objects from the belt
hook. ONLY hang tool’s belt hook from a workbelt.

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
9
that is provided. Be sure to securely
tighten thescrew.
The belt hook
8
or bit clip
10
can be attached to either side of
the tool using only the screw
9
provided, to accommodate left-
or right-handed users. If the hook or bit clip is not desired at all,
it can be removed from thetool.
To move 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.