Maintenance; Screwdriver Operation; Hammerdrill Operation; Lubrication - DeWalt XR LI-ION DCD931 Original Instructions Manual

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.
Screwdriver Operation (Figure 4)
1. Select the desired speed/torque range using the
three-speed gear shifter (g) on the top of tool
to match the speed and torque to the planned
application. Initially set the torque adjustment
collar (e) at a lower setting to ensure the
fastener to be set to your specification.
NOTE: Use the lowest torque setting required
to seat the fastener at the desired depth. The
lower the number, the lower the torque output.
2. Rotate the mode control collar (f) so the screw
symbol is aligned with the arrow.
3. Reset the torque adjustment collar (e) to the
appropriate number setting for the torque
desired. Make a few practice runs in scrap or
unseen areas to determine the proper position
of the torque adjustment collar.
NOTE: The torque adjustment collar may be
set to any number at any time. However, the
torque adjustment collar is only engaged during
screwdriving mode and not in drill and hammerdrill
modes.
Hammerdrill Operation (Figure 5)
1. Select the desired speed/torque range using
the gear shifter to match the speed and torque
to the planned operation. Set the mode control
collar (f) to the hammer symbol.
2. When drilling, use just enough force on the
hammer to keep it from bouncing excessively.
Too much force will cause slower drilling
speeds, overheating, and a lower drilling rate.
3. 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.
4. 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.
5. For masonry, use carbide-tipped bits or
masonry bits. A smooth, even flow of dust
indicates the proper drilling rate.

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 and battery pack are not serviceable.
There are no serviceable parts inside.

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.
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.
CHARGER CLEANING INSTRUCTIONS
WARNING: Shock hazard. Disconnect
the charger from the AC outlet before
cleaning. Dirt and grease may be
removed from the exterior of the charger
using a cloth or soft non-metallic brush.
Do not use water or any cleaning
solutions.
E NG L I S H
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