Prior To Operation; Proper Hand Position - DeWalt DWE490 Instruction Manual

damage could occur to the accessory, causing wires to
fragment from accessory wheel or cup.
Wire cup brushes or wire wheels install directly on the
threaded spindle without the use of flanges. Use only wire
brushes or wheels provided with a threaded hub. These
accessories are available at extra cost from your local dealer
or authorised service center.
1. Place the tool on a table, guard up.
2. Thread the wheel on the spindle by hand.
3. Depress spindle lock button
hub of the wire wheel or brush to tighten the wheel.
4. To remove the wheel, reverse the above procedure.
NOTICE: To reduce the risk of damage to the tool,
properly seat the wheel hub before turning the tool on.
Mounting Flaring Cup Wheel (Fig. G)
1. Remove the mount .
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2. Install the flaring cup wheel backing flange, aligning the
flats on spindle with the flats on backing flange
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Fig. G
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2
1
3. Thread the flaring cup wheel on spindle by hand,
seating wheel against backing flange.
4. Depress the spindle lock button and tighten the wheel
by hand.
5. To remove the wheel, reverse the above procedure.

CAUTION: Failure to properly seat the wheel against
backing flange before turning the tool on may result
in damage to the tool or the wheel.
NoTE: Adjust the guard skirt so that only 1/8" (3 mm) of the
wheel is exposed below the skirt.

Prior to Operation

• Install the guard and appropriate disc or wheel. Do not
use excessively worn discs or wheels.
and use a wrench on the
2
.
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• Be sure the inner and outer flange are mounted
correctly. Follow the instructions given in the Grinding
and Cutting Accessory Chart.
• Make sure the disc or wheel rotates in the direction of
the arrows on the accessory and the tool.
• Do not use a damaged accessory. Before each use
inspect the accessory such as abrasive wheels for chips
and cracks, backing pad for cracks, tear or excess wear,
wire brush for loose or cracked wires. If power tool or
accessory is dropped, inspect for damage or install an
undamaged accessory. After inspecting and installing
an accessory, position yourself and bystanders away
from the plane of the rotating accessory and run the
power tool at maximum no­load speed for one minute.
Damaged accessories will normally break apart during
this test time.
Removal of Lock-On Feature
The lock­on button can be permanently removed without
compromising compliance with regulatory agencies shown
on the tool's nameplate. Removal of the lock pin must be
done by a D WALT service center.
e
OPERATION

WARNING: Always observe the safety instructions
and applicable regulations.

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.

Proper Hand Position


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.
Trigger Switch (Fig. I)

CAUTION: Before connecting the tool to a power
source or after a power failure, depress and release the
trigger switch 1 once without depressing the lock-
on button to ensure that the switch is in the off
2
position. If the trigger switch is locked on, the tool will
start unexpectedly when power is reconnected to the
tool. Hold the side handle and rear handle firmly to
maintain control of tool at start up and during use.
To turn the tool on, depress the trigger switch
will remain running while the trigger is depressed. Turn the
tool off by releasing the trigger.
ENglIsh
. The tool
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