DeWalt DCH334 Original Instructions

12
ENGLISH
To insert a drill bit or other accessory in keyless chuck:
1. Grasp the sleeve
16
of the chuck with one hand and use
the other hand grasping the base of thechuck.
2. 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 and
tighten securely by rotating the chuck sleeve clockwise
with one hand while holding the tool with the other hand.
Continue to rotate the chuck sleeve until several ratchet
clicks are heard to ensure full grippingpower.
Be sure to tighten chuck with one hand on the chuck sleeve and
one hand holding the tool for maximum tightness.
To release the accessory, repeat Steps 1 and 2above.
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/accessories or when making
repair. An accidental start-up can causeinjury.
Proper Hand Position (Fig.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 main handle
8
,
with the other hand on the side handle
5
.
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 
3
to selectthe
mode appropriate to desiredoperation.
Symbol Mode Application
Rotary Drilling
Screwdriving
Drilling into steel, wood
andplastics
Rotary
Hammering
Drilling into concrete and
masonry
Hammering
only
Lightchipping
To select an operating mode:
1. Depress the mode selector release button
4
.
2. Rotate the mode selector dial so that the arrow points to the
symbol corresponding with the desiredmode.
NOTE: The mode selector
3
must be in rotary drilling, 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.

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 to the tool. Refer to Bit and BitHolders.
2. Using the mode selector dial
3
, selectthe mode
appropriate to desired application. Refer to
OperationModes.
3. Adjust the side handle
5
asrequired.
4. Place the bit/chisel on the desiredlocation.
5. Select the direction ofrotation using the forward/reverse
button
2
. When changing the position of the control
button, be sure the trigger isreleased.
- To select forward rotation, press the for ward/re verse
control button on the right side of thetool.
- To select reverse, press the forward/reverse control
button on the left side of thetool.
NOTE: The center position of the control button locks
the tool in the offposition.
6. Depress the trigger switch
1
. The farther you depress
the trigger switch, the faster the tool will operate. For
maximum tool life, use variable speed only for starting holes
orfasteners.
NOTE: Depending on your tool, depressing the trigger
switch activates a worklight
13
designed to illuminate the
immediate work surface. Refer to Description. The worklight
will automatically turn off 20 seconds after the trigger
switch isreleased.

WARNING:
• Do not use this tool to mix or pump easily combustible
or explosive fluids (benzine, alcohol, etc.).
• Do not mix or stir inflammable liquids
labelledaccordingly.
MAINTENANCE
Your DeWALT 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/accessories or when making
repair. An accidental start-up can causeinjury.

DeWalt DCH334 Specifications

General

Brand	DeWalt
Model	DCH334
Category	Rotary Hammer
Language	English