DeWalt DC900-XE Instruction Manual page 10

SCREWDRIVING (FIG. 2)
1. Select the desired speed/torque range using the three-speed gear shifter (E) on
the top of tool to match the speed and torque to the planned application. To set
the torque level to the proper setting on the clutch collar, initially set the clutch
collar at a lower setting to ensure the fastener to be set to your specification.
Note: Use the lowest torque setting required to seat the fastener at the desired
depth. The lower the number, the lower the torque output.
2. Rotate the mode control collar (C) so the line on the lever (F) is aligned with the
screw symbol.
3. Set the torque adjustment collar (D) to the appropriate number setting for the
torque desired.
NOTE: The torque adjustment collar may be set on any number and change
between screwdriving and drilling modes using the mode control collar.
DRILLING (FIG. 3)
CAUTION: When the mode collar is in the drill/hammerdrill mode, the drill will not
clutch out regardless of the position of the torque adjustment collar (D).
Rotate the mode control collar (C) so that the line on the lever (F) is aligned with the
drill symbol.
NOTE: The torque adjustment collar (D) may be set on any number.
HAMMERDRILLING (FIG. 4)
Rotate the mode control collar (C) to align the line on the lever (F) with the hammerdrill
symbol and turn the torque adjustment collar (D) to align the hammer symbol with the
line (F).
Torque Adjustment Collar (Fig. 2)
Your tool has an adjustable torque screwdriver mechanism for driving and removing
a wide array of fastener shapes and sizes and a hammer mechanism for drilling into
masonry. Circling the torque adjustment collar (D) are numbers and a hammer sym-
bol. 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 which can
be driven. To select any of the numbers, rotate until the desired number aligns with
the arrow.
Three-Speed Gearing (Fig. 2)
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 (E) all the way to the left. Speed 2 (middle torque and speed setting) is in
the middle position. Speed 3 (highest speed setting) is to the right.
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.
Self-Tightening Chuck Operation
(Fig. 5–7)
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 when
changing accessories.
WARNING: Always ensure the bit is secure
before starting the tool. A loose bit may eject
from tool causing possible personal injury.
TO INSERT A DRILL BIT OR OTHER
ACCESSORY
1. Lock the trigger in the OFF position.
2. Grasp the chuck sleeve (G) with one hand
and use the other hand to secure the tool
as shown in Figure 5. Rotate the sleeve
counterclockwise (viewed from the
front) far enough to accept the desired
accessory.
3. Insert the bit or other accessory about
19 mm (3/4") into the chuck, as shown
in Figure 6. Grasp the chuck sleeve
securely and rotate the sleeve clockwise
(viewed from the front) with one hand
8
FIG. 5
FIG. 6