User Manual

11
ENGLISH
Optional Accessories

WARNING: Since accessories, other than those offered
by
DeWALT
, have not been tested with this product, use
of such accessories with this tool could be hazardous.
To reduce the risk of injury, only
DeWALT
recommended
accessories should be used with thisproduct.
Consult your dealer for further information on the
appropriateaccessories.
Cleaning

WARNING: Blow dirt and dust out of the main housing
with dry air as often as dirt is seen collecting in and around
the air vents. Wear approved eye protection and approved
dust mask 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 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.
Lubrication
Your power tool requires no additionallubrication.
When the trigger is released, the worklight will stay illuminated
for up to 20 seconds. If the trigger switch remains depressed,
the worklights will remainon.
NOTE: The worklights are for lighting the immediate work
surface and are not intended to be used as aflashlight.
Quick-Release Chuck (Fig.A,F, G)

WARNING: Use only impact accessories. Non-impact
accessories may break and cause a hazardous condition.
Inspect accessory prior to use to ensure that it con tains
nocracks.
NOTE: The chuck accepts 6.35mm hex bit tips only. Using
25mm bits allows better access in tightspaces.
Place the forward/reverse button
4
in the locked off (centre)
position or remove battery pack before changingaccessories.
To install an accessory (Fig F), push accessory to fully insert
into chuck
6
. The chuck collar
5
does not need to be pulled up
to lock accessory inplace.
To remove an accessory (Fig G), pull the chuck collar away
from the front of the tool. Remove the accessory and release
thecollar.
Usage
Your impact tool generates the following maximum torque:
Cat # Nm Ft.-Lbs. In.-Lbs
DCF809 190 142 1700

CAUTION: Ensure fastener and/or system will withstand
the level of torque generated by the tool. Excessive torque
may cause breakage and possible personalinjury.
1. Place the accessory on the fastener head. Keep the tool
pointed straight at thefastener.
2. Press switch to start operation. Release the switch to stop
operation. Always check torque with a torque wrench, as
the fastening torque is affected by many factors including
the following:
• Voltage: Low voltage, due to a nearly discharged
battery, will reduce fasteningtorque.
• Accessory size: Failure to use the correct accessory
size will cause a reduction in fasteningtorque.
• Bolt Size: Larger bolt diameters generally
require higher fastening torque. Fastening torque
will also vary according to length, grade, and
torquecoefficient.
• Bolt: Ensure that all threads are free of rust and other
debris to allow proper fasteningtorque.
• Material: The type of material and surface finish of
the material will affect fasteningtorque.
• Fastening Time: Longer fasten ing time results in
increased fastening torque. Using a longer fastening
time than recom mended could cause the fasteners to
be overstressed, stripped ordamaged.
MAINTENANCE
Your 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 or accessories. An accidental
start-up can cause injury.
The charger and battery pack are notserviceable.