Maintenance - DeWalt DC927 Manual

E N GLI SH
2. Grasp the chuck sleeve (f) with one hand and
use the other hand to secure the tool as shown
in figure 7. Rotate the sleeve counterclockwise
(viewed from the front) far enough to accept the
desired accessory.
3. Insert the bit or other accessory about 19 mm
(3/4") into the chuck, as shown in figure 8.
Grasp the chuck sleeve securely and rotate the
sleeve clockwise (viewed from the front) with
one hand while using the other hand to secure
the tool. Rotate the sleeve clockwise until sleeve
cannot be rotated any further, as demonstrated
in figure 9. As the drill is being
operated in the forward position, the chuck
will continually self-tighten the jaws of the
chuck onto the bit to maximize the bit
gripping strength.
To release the accessory, repeat Step 2.
Drill Operation
1. Select the desired speed/torque range using the
gear shifter to match the speed and torque to
the planned operation.
2. For WOOD, use twist bits, spade bits, power
auger bits or hole saws. For METAL, use high-
speed steel twist drill bits or hole saws. Use
a cutting lubricant when drilling metals. The
exceptions are cast iron and brass which should
be drilled dry.
3. Always apply pressure in a straight line with the
bit. Use enough pressure to keep the drill bit
biting, but do not push hard enough to stall the
motor or deflect the bit.
4. Hold tool firmly with both hands to control the
twisting action of the drill.
5. IF DRILL STALLS, it is usually because it
is being overloaded. RELEASE TRIGGER
IMMEDIATELY, remove drill bit from work, and
determine cause of stalling. DO NOT CLICK
TRIGGER OFF AND ON IN AN ATTEMPT
TO START A STALLED DRILL – THIS CAN
DAMAGE THE DRILL.
6. Keep the motor running when pulling the bit
back out of a drilled hole. This will help prevent
jamming.
Hammerdrill Operation
1. When drilling, use just enough force on the
hammer to keep it from bouncing excessively
or "rising" off the bit. Too much force will cause
slower drilling speeds, overheating, and a lower
drilling rate.
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2. Drill straight, keeping the bit at a right angle to
the work. Do not exert side pressure on the bit
when drilling as this will cause clogging of the
bit flutes and a slower drilling speed.
3. When drilling deep holes, if the hammer speed
starts to drop off, pull the bit partially out of
the hole with the tool still running to help clear
debris from the hole.
4. For MASONRY, use carbide-tipped bits or
masonry bits. A smooth, even flow of dust
indicates the proper drilling rate.
Screwdriver Operation
Select the desired speed/torque range using the
three-speed gear shift lever on the top of tool
to match the speed and torque to the planned
operation. Insert the desired fastener accessory into
the chuck as you would any drill bit. Set the torque
adjustment collar (d) to the desired setting. Make
a few practice runs in scrap or unseen areas to
determine the proper position of the clutch collar.

MAINTENANCE

Your D WALT power tool has been designed to
E
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 is not serviceable. There are no
serviceable parts inside the charger.
Lubrication
Your power tool requires no additional lubrication.
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.