Manual DeWalt D25553 (page 9 of 36) (English, French, Spanish, All languages)

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Chisel Bit adjustment ( )

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™ 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

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.

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.

Proper hand position requires one hand on the side

handle3, with the other hand on the main handle4.

Fig. F 4

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.

Trigger Switch (Fig. A)

D25501, D25553, D25601, D25603,

D25651

To turn the tool on, depress the trigger switch1. To stop

the tool, release the triggerswitch.

In chipping mode only, lock the trigger switch on by

pushing the lock-on slider2 upward while depressing the

triggerswitch.

To deactivate the lock-on slider, depress the trigger switch

once thenrelease.

The lock-on slider may only be activated in chipping mode.

The machine will stop running when trying to engage the

lock-on slider in hammerdrilling mode. The motor will stop

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DeWalt D25553 Manual

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