DeWalt DCH416, Instruction Manual

11

English

Replacing the Dust Brush (Fig. H)

WARNING:

 Wear approved eye protection and 

approved dust mask when performing this procedure.

The dust brush will wear during use and will need to be 
replaced at the same time as the filter.

1.  Push the snap‑fit button 

 26 

, and pull the dust extraction 

head 

 27 

 out of the head holder.

2.  Insert the new extraction head back into the head holder. 

The centering pin will stick into the open end of the dust 
brush and secure it in place.

MAINTENANCE

WARNING: To reduce the risk of serious personal 

injury, turn unit off and remove the battery pack 

before making any adjustments or removing/

installing attachments or accessories.

 An 

accidental start‑up can cause injury.

Your 

D

e

WALT

 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.

‑

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 

 14 

 designed to illuminate 

the immediate work surface. 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.

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 

 3 

 so that the arrow points 

to the symbol corresponding with the desired mode.

nOTE:

 The mode selector dial 

 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 

 6 

 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 and motor has 
come to a complete stop.

Overload Clutch

In case of jamming of a drill bit, the drive to the drill spindle 
is interrupted by the overload clutch. Due to the resulting 
forces, always hold the tool with both hands and take a 
firm stance. After the overload, release and depress the 
trigger to re‑engage drive.

WARNING:

 Drill may stall if overloaded causing a 

sudden twist. Always expect the stall. Grip the drill 
firmly to control the twisting action and avoid injury.

Cleaning

WARNING:

 Blow dirt and dust out of all air vents with 

clean, dry air at least once a week. To minimize the risk 
of eye injury, always wear ANSI Z87.1 approved eye 
protection when performing this procedure.

WARNING:

 Never use solvents or other harsh 

chemicals for cleaning the non‑metallic parts of the 
tool. These chemicals may weaken the plastic materials 
used in these parts. Use a cloth dampened only with 
water and mild soap. Never let any liquid get inside the 
tool; never immerse any part of the tool into a liquid.