Operation - DeWalt DCD778M1 Manual

2. To select speed 2 (low torque setting), turn the tool off
and permit it to stop. Slide the gear shifter back (away from
the chuck).
nOTE: Do not change gears when the tool is running. Always
allow the drill to come to a complete stop before changing
gears. If you are having trouble changing gears, make sure that
the dual range gear shifter is either completely pushed forward
or completely pushed back.
Worklight (Fig. A)
There is a worklight 5 located just above the trigger switch
The worklight is activated when the trigger switch is depressed.
When the trigger is released, the worklight will stay illuminated
for up to 20 seconds.
nOTE: The worklight is for lighting the immediate work surface
and is not intended to be used as a flashlight.
Keyless Single Sleeve Chuck (Fig. G – I)

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 remove the battery from the
tool when changing acces sories.

WARNING: Always ensure the bit is secure before starting
the tool. A loose bit may eject from tool causing possible
personal injury.
Your tool features a keyless chuck
sleeve for one-handed operation of the chuck. To insert a
15
drill bit or other accessory, follow these steps.
1. Turn tool off and remove the 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
anticlockwise (as viewed from the front) far enough to accept
the desired accessory.
3. Insert the accessory about 19 mm into the chuck and tighten
securely by rotating the chuck sleeve clockwise with one hand
while holding the tool with the other hand. Continue to rotate
the chuck sleeve until several ratchet clicks are heard to ensure
full gripping power.
nOTE: 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.

OPERATION

Instructions for Use

WARNING: Always observe the safety instructions and
applicable regulations.

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.
Proper Hand Position (Fig. C)

WARNING: To reduce the risk of serious personal injury,
ALWAYS use proper hand position as shown.

WARNING: To reduce the risk of serious personal injury,
ALWAYS hold securely in anticipation of a sudden reaction.
Proper hand position requires one hand on the main handle
and the other hand holding the battery pack
1
6 with one rotating chuck
9
7 .
Screwdriver Operation (Fig. D)
1. Select the desired speed/torque range using the dual
range gear selector to match the speed and torque of the
planned operation.
2. Turn the torque adjustment collar
Lower numbers indicate lower torque settings; higher numbers
indicate higher torque settings.
3. Insert the desired fastener accessory into the chuck as you
would any drill bit.
4. Make some practice runs in scrap or on unseen areas to
.
determine the proper position of the clutch collar.
5. Always start with lower torque settings, then advance to
higher torque settings to avoid damage to the workpiece
or fastener.
Drill Operation (Fig. E)

WARNING: To reduce the risk of serious personal injury, turn
tool off and disconnect tool from power source before making any
adjustments or removing/installing attachments or accessories.

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. Turn the collar 3
2. Select the desired speed/torque range using the gear shifter
to match the speed and torque to the planned operation.
3. 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.
4. Always apply pressure in a straight line with the bit. Use
enough pressure to keep drill biting, but do not push hard
enough to stall the motor or deflect the bit.
5. Hold tool firmly with both hands to control the twisting
action of the drill. If model is not equipped with side handle,
grip drill with one hand on the handle and one hand on the
battery pack.

CAUTION: Drill may stall if overloaded causing a sudden
twist. Always expect the stall. Grip the drill firmly to control the
twisting action and avoid injury.
6. iF DRill sTAlls, it is usually because it is being overloaded
or improperly used. RElEAsE TRiggER iMMEDiATElY,
remove drill bit from work, and determine cause of stalling.
DO nOT CliCK TRiggER On AnD OFF in An ATTEMPT TO
sTART A sTAllED DRill — This CAn DAMAgE ThE DRill.
7. To minimize stalling or breaking through the material, reduce
pressure on drill and ease the bit through the last fractional part
of the hole.
8. Keep the motor running when pulling the bit back out of a
drilled hole. This will help prevent jamming.
9. With variable speed drills there is no need to center punch
the point to be drilled. Use a slow speed to start the hole and
accelerate by squeezing the trigger harder when the hole is
deep enough to drill without the bit skipping out.
Hammerdrill Operation (Fig. F)
DCD778 Only
1. Turn the collar 3
2. Select the high speed setting by sliding the selector back
(away from the chuck).
iMPORTAnT: Use carbide-tipped or masonry bits only.
3 to the desired position.
to the drill symbol.
to the hammerdrill symbol.
English
9 9