DeWalt DCF850 Guide D'utilisation page 46

English
when the battery pack is below +40 °F (+4.5 °C), or
above +104 °F (+40 °C). This is important and will
prevent serious damage to the battery pack.
2. The charger and battery pack may become warm to the
touch while charging. This is a normal condition, and
does not indicate a problem. To facilitate the cooling of
the battery pack after use, avoid placing the charger or
battery pack in a warm environment such as in a metal
shed or an uninsulated trailer.
3. If the battery pack does not charge properly:
a. Check operation of receptacle by plugging in a lamp
or other appliance;
b. Check to see if receptacle is connected to a light
switch which turns power off when you turn out
the lights;
c. If charging problems persist, take the tool, battery
pack and charger to your local service center.
4. You may charge a partially used pack whenever you
desire with no adverse effect on the battery pack.
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.
Wall Mounting
Some D WALT chargers are designed to be wall mountable
e
or to sit upright on a table or work surface. If wall mounting,
locate the charger within reach of an electrical outlet, and
away from a corner or other obstructions which may impede
air flow. Use the back of the charger as a template for the
location of the mounting screws on the wall. Mount the
charger securely using drywall screws (purchased separately)
at least 1" (25.4 mm) long, with a screw head diameter of
0.28–0.35" (7–9 mm), screwed into wood to an optimal
depth leaving approximately 7/32" (5.5 mm) of the screw
exposed. Align the slots on the back of the charger with the
exposed screws and fully engage them in the slots.
SAVE THESE INSTRUCTIONS FOR
FUTURE USE
ASSEMBLY AND ADJUSTMENTS

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.
Installing a Bit or Accessory into a Keyless
Chuck (Fig. D)

WARNING: Do not attempt to tighten drill bits (or
any other accessory) by gripping the front part of the
chuck and turning the tool on. Damage to the chuck
and personal injury may result. Always lock off trigger
switch and disconnect tool from power source when
changing acces sories.
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WARNING: Always ensure the bit is secure before
starting the tool. A loose bit may eject from tool
causing possible personal injury.
To insert a drill bit or other accessory, follow these steps.
1. Turn tool off and remove battery pack.
2. Grasp the black sleeve of the chuck with one hand
and use the other hand to secure the tool. Rotate the
sleeve counterclockwise far enough to accept the
desired accessory.
3. Insert the accessory about 3/4" (19 mm) into the
chuck 6 and tighten securely by grasping and rotating
the chuck sleeve 7 clockwise with one hand while
holding the tool with the other. When the chuck is nearly
tightened you will hear a clicking sound. After 8-12 clicks
the chuck is securely tightened around the accessory.
Your tool is equipped with an automatic spindle lock
mechanism. This allows you to open and close the chuck
with one hand.
Be sure to tighten chuck with one hand on the chuck sleeve
and one hand holding the tool for maximum tightness.
To release the accessory, repeat steps 1 and 2 above.
Speed Selection (Fig. A)
The tool features two speed settings for greater versatility.
nOTE: Do not change speeds when the tool is running.
Always allow the tool to come to a complete stop before
changing speed.
1. To select speed 1 (higher torque setting), slide the speed
selector forward (towards from the chuck).
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2. To select speed 2 (lower torque setting), slide the speed
selector back (away the chuck).
If the tool does not change speeds, confirm that the speed
selection switch is completely engaged in the forward or
back position.
Mode Selection (Fig. A)
The mode selection collar
the correct operating mode depending upon the
planned application.
To select, rotate the collar until the desired symbol aligns
with the arrow.

WARNING: When the mode selection collar is in
the drill or hammerdrill positions, the drill will not
clutch. The drill may stall if overloaded, causing a
sudden twist.
symbol
1-15
Screwdriving (higher number = greater torque)
symbol
1-15
Screwdriving (higher number = greater torque)
5 can be used to select
DCD800
Mode
Drilling
DCD805
Mode
Drilling
Hammerdrilling