DeWalt DCD991 Original Instructions Manual page 25

for optimum performance of the electronic clutch, speeds 2 and
3 are preferred.
nOTE: Use the lowest torque setting (1) first and increase the
number through to the highest setting (11) to seat the fastener
at the desired depth. The lower the number, the lower the
torque output.
2. Reset the torque adjustment collar
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.
Drill Operation (Fig. D)

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.
1. Select the desired speed/torque range using the
speed selector 8 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 (Fig. E)
1. Select the desired speed/torque range using the speed
selector 8 to match the speed and torque to the planned
operation. Set the torque adjustment collar
hammer symbol.
2. Select the high speed (3) setting by sliding the speed
selector back (away from the chuck).
3. When drilling, use just enough force on the hammer to
keep it from bouncing excessively. Prolonged and too much
force on the hammer will cause slower drilling speeds and
potential overheating.
4. 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.
5. 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.
Lubrication
Your power tool requires no additional lubrication.
5 to the appropriate
5 to the
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.
Cleaning

WARNING: Electrical shock and mechanical hazard.
Disconnect the electrical appliance from the power source
before cleaning.

WARNING: To ensure safe and efficient operation, always
keep the electrical appliance and the ventilation slots clean.

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.
Ventilation slots can be cleaned using a dry, soft non-metallic
brush and/or a suitable vacuum cleaner. Do not use water or
any cleaning solutions. Wear approved eye protection and an
approved dust mask.
Optional Accessories

WARNING: Since accessories, other than those offered by
D WALT, have not been tested with this product, use of such
e
accessories with this tool could be hazardous. To reduce the risk
of injury, only D WALT-recommended accessories should be used
e
with this product.
Consult your dealer for further information on the
appropriate accessories.
Protecting the Environment
Separate collection. Products and batteries marked
w
with this symbol must not be disposed of with normal
household waste.
Products and batteries contain materials that can be
recovered or recycled, reducing the demand for raw materials.
Please recycle electrical products and batteries according to local
provisions. Further information is available at www.2helpU.com.
Rechargeable Battery Pack
This long-life battery pack must be recharged when it fails to
produce sufficient power on jobs that were easily done before. At the
end of its technical life, discard it with due care for our environment:
• Run the battery pack down completely, then remove it from
the tool.
• Li-Ion cells are recyclable. Take them to your dealer or a local
recycling station. The collected battery packs will be recycled or
disposed of properly.
EnGLIsH
25