Use and Care Manual

ENGLISH
6
Electronic Speed and Impact Control
(Fig. E)
The electronic speed and impact control allows the
use of smaller drill bits without the risk of bit breakage,
hammerdrilling into light and brittle materials without
shattering and optimal tool control for precisechipping.
To set the control dial, turn the dial
7
to the desired level.
The higher the number, the greater the speed and impact
energy. Dial settings make the tool extremely adaptable for
many different appli cations. The required setting depends
on the bit size and hardness of material beingdrilled.
Mode Selector (Fig. A)
NOTICE: Never change the mode while the unit is
running. Tool must come to a complete stop before
activating the mode selector button or damage to the
tool mayresult.

CAUTION: Do not change to hammerdrill mode with
chisel bit in tool holder. Personal injury and damage
to tool mayresult.
The D25604 and D25652 use two operating modes. To
select the required operating mode, rotate the mode
selector
6
until the arrow points to the hammerdrilling or
the chipping icon. The D25831 and D25851 use only the
chippingmode.
Rotary Hammering Mode ( )
D25604, D25652
The tool simultaneously rotates and impacts the
work. This mode is appropriate for all concrete and
masonryoperations.
Chipping Mode ( )
D25831, D25851
The spindle lock is engaged during chipping mode
so the tool impacts the work without rotating. This
mode is appropriate for light chipping, chiseling and
demolitionapplications.
NOTE: In chipping mode, the hammerdrill can also be used
as a lever to free a jammed drillbit.
Chisel Bit adjustment ( )
D25604, D25652, D25831, D25851
Turn the mode selector to one of the chisel bit adjustment
icons to adjust the chisel to the desired position. There are
multiple positions to set the angle of the chisel. After finding
the desired position, slightly maneuver the chisel bit back
and forth to ensure the chisel is properlyengaged.
Indicator Lights (Fig. A, E)
The yellow brush wear indicator LED
10
 lights up when
the carbon brushes are nearly worn out indicating that the
tool needs servicing within the next 8 hours ofuse.
The red indicator LED
9
 lights up if the lock-on slider
2
and/or E-Clutch® System is engaged in any mode except
the chippingmode.
The red indicator LED
9
 starts to flash if there is a fault with
the tool or the brushes have completely worn out (refer to
Repairs underMaintenance).
INDICATOR DIAGNOSIS SOLUTION
OFF Tool is functioning
normally
Follow all
warnings and
instructions when
operating tool
SOLID Perform and protect
control has been
activated
With tool properly
supported, release
trigger; the tool
will function
normally when
the trigger is
depressed again
and the indicator
light will go out
FLASHING Perform and
protect control is
malfunctioning
Take the tool to
an authorized
DeWALT
repairagent.
NOTE: If the tool power is insufficient for normal
hammering and if the LED does not flash repeatedly after
cycling the trigger, take the tool to an authorized D
e
WALT
repaircenter.
OPERATION

WARNING: To reduce the risk of serious personal
injury, turn unit off and disconnect it from
power source before making any adjustments or
removing/installing attachments or accessories.
An accidental start-up can causeinjury.

WARNING: To reduce the risk of personal injury,
ALWAYS ensure workpiece is anchored or
clamped firmly. If hammerdrilling thin material,
use a wood “back-up” block to prevent damage to
thematerial.

WARNING: To reduce the risk of personal injury,
ALWAYS operate the tool with the side handle
properly installed and securely tightened. 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.

WARNING: Drill may stall if overloaded causing a
sudden twist. Always expect the stall. Grip the drill
firmly with both hands to control the twisting action
and avoidinjury.
NOTE: Operating temperature of this tool is 19 ˚F to 104 ˚F
(-7 ˚C to +40 ˚C). Using the tool outside of this temperature
range will decrease the life of thetool.
Proper Hand Position (Fig. F)

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.