DeWalt DCD990 Instruction Manual page 11

Forward/Reverse Control Button (Fig. 2)
A forward/reverse control button (B) determines the direction of 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 fi rst 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.
Worklight (Fig. 2)
There is a worklight (C) located on the foot of the tool. The worklight is
activated when the trigger switch is depressed, and will automatically
turn off 20 seconds after the trigger switch is released. If the trigger
switch remains depressed, the worklight will remain on.
NOTE: The worklight is for lighting the immediate work surface and is
not intended to be used as a fl ashlight.
Torque Adjustment Collar/Electronic
Clutch (Fig. 3–5)
Your tool has an electronic adjustable torque screwdriver system for
driving and removing a wide array of fasteners. Circling the torque
adjustment collar (E) are numbers. These 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 that can be driven. To
select any of the numbers, rotate until the desired number aligns with
the arrow.
WARNING: When the torque adjustment collar is in the drill or
hammerdrill positions, the drill will not clutch. The drill may stall if
overloaded, causing a sudden twist.
FIG. 3 FIG. 4
E
F
Three-Speed Gearing (Fig. 3–5)
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 (F) 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.
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, depress and release the trigger switch and try
again.
Keyless Single Sleeve Chuck (Fig. 6–8)
WARNING: Do not attempt to tighten drill bits (or any other
accessory) by gripping the front part of the chuck and turning the
10
FIG. 5
E
F