Assembly And Adjustments - DeWalt DWE43840CN Instruction Manual

Features
E-switch Protection™
The ON/OFFswitch has a no-volt release function. In the
event of a power outage or other unexpected shut down,
the switch will need to be cycled (turned off and then on)
to restart tool.
E-Clutch™
This unit is equipped with an E-Clutch™ (Electronic Clutch),
which in the event of a high-load or wheel pinch, the unit
will be shut off to reduce the reaction torque to the user.
The switch needs to be cycled (turned off and then on) to
restart tool.
Gear Case Grip
The gear case grip is a soft grip cover for the gear case that
can be used as a gripping surface only for pipeline grinding
and wire brushing where the edge of the wheel is used
for grinding and cleaning and precise control is needed to
ensure accuracy. As with any gripping surface, maintain
firm grip during use. The side handle should be used as the
secondary grip surface for all other applications.
Brake
When the trigger switch is released the motor immediately
turns off and electronically brakes stopping the
accessory quickly.
Kickback Brake™
When a severe pinch, stall, or bind-up event is sensed the
electronic brake engages with maximum force to quickly
stop the wheel, reduce the movement of the grinder, and
shut the grinder off. Turn the unit on to restart tool.
Constant Clutch™
When overloaded or stalled the motor torque is reduced. If
load is reduced the torque and RPM will increase. If the tool
is stalled for an extended amount of time it will shut-off and
require the switch to cycle to restart.
LED Indicator (Fig. A)
The LED indicator will remain lit green during normal
10
activity, or blink in a pattern of red light to alert you a
tool protection feature has been activated. Refer to the
LED Guide at the back of this manual for explanations of
blink patterns.

ASSEMBLY AND ADJUSTMENTS


WARNING: To reduce the risk of serious personal
injury, turn unit off and disconnect it from
power source before making any adjustments or
removing/installing attachments or accessories.
An accidental start-up can cause injury.
Accessories
The capacity of the DWE43840CN is 7" (180 mm) diameter x
1/4" (6.35 mm) thick grinding wheels.
It is important to choose the correct guards, backing pads
and flanges to use with grinder accessories. See page 13 for
information on choosing the correct accessories.

WARNING: Handle and store all abrasive wheels
carefully to prevent damage from thermal shock, heat,
mechanical damage, etc. Store in a dry protected area
free from high humidity, freezing temperatures or
extreme temperature changes.
Attaching Side Handle (Fig. A)

WARNING: Before using the tool, check that the
handle is tightened securely.
Screw the side handle tightly into one of the holes on
5
either side of the gear case. The side handle should always
be used to maintain control of the tool at all times.
Guards

CAUTION: Guards must be used with all grinding
wheels, cutting wheels, sanding flap discs,
wire brushes, and wire wheels. The tool may
be used without a guard only when sanding with
conventional sanding discs. Refer to Figure A to see
guards provided with the unit. Some applications may
require purchasing the correct guard from your local
dealer or authorized service center.
nOTE: Edge grinding and cutting can be performed with
Type 27 wheels designed and specified for this purpose;
1/4" (6.35 mm) thick wheels are designed for surface
grinding while thinner Type 27 wheels need to be examined
for the manufacturer's label to see if they can be used for
surface grinding or only edge grinding/cutting. A Type 1
guard must be used for any wheel where surface grinding
is forbidden. Cutting can also be performed by using a
Type 41 wheel and a Type 1 guard.
nOTE: See the Accessories Chart to select the proper guard
/ accessory combination.
Mounting and Removing Guard (Fig. C, D)

CAUTION: Guards must be used with all grinding
wheels, cut-off wheels, diamond coated wheels,
sanding flap discs, wire brushes, and wire wheels.
The tool may be used without a guard only when
sanding with conventional sanding discs. Some
D WALT models are provided with a guard intended
e
for use with depressed center wheels (Type 27) and
hubbed grinding wheels (Type 27). The same guard
is designed for use with sanding flap discs (Type 27
and 29) and wire brushes. Grinding and cutting with
wheels other than Type 27 and 29 require different
accessory guards not included with tool. Mounting
instructions for these accessory guards are included in
the accessory package.
1. Open the guard latch . Align the lugs
7
guard with the slots 15 on the gear case.
English
on the
14
7