DeWalt DCD991 Mode D'emploi page 37

Variable Speed Switch (Fig. A)
To turn the tool on, squeeze the trigger switch
tool off, release the trigger switch. Your tool is equipped with
a brake. The chuck will stop as soon as the trigger switch is
fully released.
nOTE: Continuous use in variable speed range is not
recommended. It may damage the switch and should
be avoided.
Side Handle (Fig. A)

WARNING: To reduce the risk of personal injury, ALWAYS
operate the tool with the side handle properly installed.
Failure to do so may result in the side handle slipping
during tool operation and subsequent loss of control. Hold
tool with both hands to maximize control.
The side handle 7 clamps to the front of the gear case and may
be rotated 360˚ to permit right- or left-hand use. Side handle
must be tightened sufficiently to resist the twisting action of
the tool if the accessory binds or stalls. Be sure to grip the side
handle at the far end to control the tool during a stall.
If model is not equipped with side handle, grip drill with one
hand on the handle and one hand on the battery pack.
nOTE: Side handle comes equipped on all models.
Forward/Reverse Control Button (Fig. A)
A forward/reverse control button
the tool and also serves as a lock off button.
To select forward rotation, release the trigger switch and
depress the for ward/re verse control button on the right side of
the tool.
To select reverse, release the trigger switch and depress the
forward/reverse control button on the left side of the tool.
The center position of the control button locks the tool in the off
position. When changing the position of the control button, be
sure the trigger is released.
nOTE: The first time the tool is run after changing the direction
of rotation, you may hear a click on start up. This is normal and
does not indicate a problem.
Torque Adjustment Collar/Electronic Clutch
(Fig. C–E)
Your tool has an electronic adjustable torque screwdriver
mechanism for driving and removing a wide array of fasteners.
Circling the torque adjustment collar
numbers are used to set the clutch to deliver a torque range.
The higher the number on the collar, the higher the torque and
the larger the fastener which can be driven. To select any of the
numbers, rotate until the desired number aligns with the arrow.
Three-Speed Gearing (Fig. A, C–E)
The three-speed feature of your tool allows you to shift gears
for greater versatility. To select speed 1 (highest torque setting),
turn the tool off and permit it to stop. Slide the gear shifter
all the way forward. Speed 2 (middle torque and speed setting)
is in the middle position. Speed 3 (highest speed setting) is to
the rear.
. To turn the
1
2 determines the direction of
5 are numbers. These
6
nOTE: Do not change gears when the tool is running. Always
allow the drill to come to a complete stop before changing
gears. If you have trouble changing gears, make sure that the
gear shifter is engaged in one of the three speed settings.
If the speed shifter becomes stuck or is difficult to select the
desired gear, pull the trigger switch
select the gear.
Keyless Single Sleeve Chuck (Fig. F–H)

WARNING: Do not attempt to tighten drill bits (or
any other accessory) by gripping the front part of the
chuck and turning the tool on. Damage to the chuck
and personal injury may result. Always lock off trigger
switch and disconnect tool from power source when
changing acces sories.

WARNING: Always ensure the bit is secure before starting
the tool. A loose bit may eject from tool causing possible
personal injury.
Your tool features a keyless chuck with one rotating sleeve for
one-handed operation of the chuck. To insert a drill bit or other
accessory, follow these steps.
1. Turn off tool and disconnect tool from power source.
2. Grasp the black sleeve of the chuck
use the other hand to secure the tool as shown in Figure F.
Rotate the sleeve counterclockwise (as viewed from the
front) far enough to accept the desired accessory.
3. Insert the accessory about 19 mm into the chuck (Fig. G).
Tighten securely by rotating the chuck sleeve clockwise
with one hand while holding the tool with the other hand
(Fig. H). Continue to rotate the chuck sleeve until several
ratchet clicks are heard to ensure full gripping power.
To release the accessory, repeat Steps 1 and 2 above.
Be sure to tighten chuck with one hand on the chuck sleeve and
one hand holding the tool for maximum tightness.
LED Worklight (Fig. A)
The LED worklight 3 and its worklight switch
the foot of the tool. The worklight is activated when the trigger
switch is depressed. The low
14
modes can be changed by moving the switch on the foot of the
tool. If the trigger switch remains depressed, the worklight will
remain on in all modes.
When on low and medium
14
automatically turn off 20 seconds after the trigger switch
is released.
Spotlight Mode
The high setting 16 is the spotlight mode. The spotlight will
run for 20 minutes after the trigger switch is released. Two
minutes before the spotlight will shut off, it will flash twice and
then dim. To avoid the spotlight shutting off, lightly tap the
trigger switch.

WARNING: While using the worklight in medium or
spotlight mode, do not stare at the light or place the drill in
a position which may cause anyone to stare into the light.
Serious eye injury could result.
EnGLIsH
1 to rotate the motor. Then
4 with one hand and
13 are located on
, medium and spotlight
15 16
settings, the beam will
15
35