DeWalt XR DCH263 Original Instructions Manual page 39

installing attachments or accessories. An accidental
start-up can cause injury.
Active Vibration Control (AVC) System (Fig. A)
For best vibration control, hold the tool as described in Proper
Hand Position and apply just enough pressure so the damping
device on the main handle is approximately mid stroke.
The active vibration control
from the hammer mechanism. Lowering hand and arm
vibration, it allows more comfortable use for longer periods of
time and extends the life of the unit.
The hammer only needs enough pressure to engage the active
vibration control. Applying too much pressure will not make
the tool drill or chip faster and active vibration control will
not engage.
Proper Hand Position (Fig. A, E)

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 side handle
with the other hand on the main handle
Trigger 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.
Variable Speed Trigger Switch
The variable speed trigger switch enables you to select the best
speed for a particular application. The farther you squeeze the
trigger switch, the faster the tool will operate. For maximum
tool life, use variable speed only for starting holes or fasteners.
nOTE: Continuous use in variable speed range is not
recommended. It may damage the trigger switch and should
be avoided.
Forward/Reverse Control Button (Fig. A)
A forward/reverse control button
bit rotation and also serves as a lock-off button.
To select forward rotation, release the trigger switch
depress the forward/reverse control button on the right side of
the tool.
To select reverse, depress the forward/reverse control button
on the left side of the tool.
The centre 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.
neutralises rebound vibration
16
.
8
3 . To turn the
2 determines the direction of
Worklight (Fig. A)

CAUTION: Do not stare into worklight. Serious eye
injury could result.
There is a worklight
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 flashlight.
Operation Modes (Fig. A)

WARNING: Do not select the operating mode when the
tool is running.
Your tool is equipped with a mode selector dial
mode appropriate for the desired operation.
symbol
5 ,
To select an operating mode:
1. Depress the mode selector release button
2. Rotate the mode selector dial so that the arrow points to the
symbol corresponding with the desired mode.
nOTE: The mode selector dial
rotary hammering or hammering only mode at all times. There
are no operable positions in between. It may be necessary to
briefly run the motor after having changed from 'hammering
only' to 'rotary' modes in order to align the gears.
Performing an Application (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.

and
1
WARNING: Always wait until the motor has come to
a complete standstill before changing the direction
of rotation.
1. Choose and install the appropriate chuck, adapter, and/or
bit onto the tool. Refer to Bit and Bit Holder.
2. Using the mode selector dial
appropriate to desired application. Refer to
Operation Modes.
3. Adjust the side handle
4. Select the direction of rotation using the forward/reverse
control button
control button, be sure the trigger is released.
13 located on the front of the tool. The
Mode
Screwdriving
Rotary Drilling
Drilling into steel, wood
and plastics
Rotary Drilling into concrete and
Hammering masonry
Hammering
Light chipping
only
must be in rotary drilling,
3
3 , select the mode
as necessary.
5
2 . When changing the position of the
EnGLIsH
to select the
3
application
4 .
37