DeWalt DWE4377 Original Instructions Manual page 13

Make sure the wheel has come to a complete stop be fore
laying the tool down.
1. To turn the tool on, push the lock-off lever
back of the tool, then depress the trigger switch
will run while the switch is depressed.
2. Turn the tool off by releasing the releasing switch.
WARNING: Allow the tool to reach full speed before
touching tool to the work surface. Lift the tool from the
work surface before turning the tool off.
Spindle Lock (Fig. A)
The spindle lock 2 is provided to prevent the spindle from
rotating when installing or removing wheels. Operate the
spindle lock only when the tool is turned off, unplugged from
the power supply, and has come to a complete stop.
NOTICE: To reduce the risk of damage to the tool, do
not engage the spindle lock while the tool is operating.
Damage to the tool will result and attached accessory
may spin off possibly resulting in injury.
To engage the lock, depress the spindle lock button and rotate
the spindle until you are unable to rotate the spindle further.
Surface Grinding, Sanding and Wire
Brushing
CAUTION: Always use the correct guard per the
instructions in this manual.
WARNING: Metal dust build-up. Extensive use of flap
discs in metal applications can result in the increased
potential for electric shock. To reduce this risk, insert an
RCD before use and clean the ventilation slots daily by
blowing dry compressed air into the ventilation slots
inaccordance with the below maintenance instructions.
To perform work on a the surface of a workpiece:
1. Allow the tool to reach full speed before touching the tool
to the work surface.
2. Apply minimum pressure to the work surface, allowing
the tool to operate at high speed. Material removal rate is
greatest when the tool operates at high speed.
3. Maintain an appropriate angle between the tool and work
surface. Refer to the chart according to particular function.
Function
Grinding
Sanding with Flap Disc
Sanding with Backing Pad
Wire Brushing
4. Maintain contact between the edge of the wheel and the
work surface.
9 toward the
. The tool
8
Angle
Angle
20˚-30˚
5˚-10˚
5˚-15˚
5˚-10˚
- If grinding, sanding with flap discs or wire brushing
move the tool continuously in a forward and back
motion to avoid creating gouges in the work surface.
- If sanding with a backing pad, move the tool constantly
in a straight line to prevent burning and swirling of
work surface.
NOTE: Allowing the tool to rest on the work surface without
moving will damage the work piece.
5. Remove the tool from work surface before turning tool off.
Allow the tool to stop rotating before laying it down.
CAUTION: Use extra care when working over an edge, as
a sudden sharp movement of grinder may be experienced.
Precautions To Take When Working on
a Painted Workpiece
1. Sanding or wire brushing of lead based paint is NOT
RECOMMENDED due to the difficulty of controlling the
contaminated dust. The greatest danger of lead poisoning is
to children and pregnant women.
2. Since it is difficult to identify whether or not a paint contains
lead without a chemical analysis, we recommend the
following precautions when sanding any paint:
Personal Safety
1. No children or pregnant women should enter the work area
where the paint sanding or wire brushing is being done
until all clean up is completed.
2. A dust mask or respirator should be worn by all persons
entering the work area. The filter should be replaced daily or
whenever the wearer has difficulty breathing.
NOTE: Only those dust masks suitable for working with lead
paint dust and fumes should be used. Ordinary painting
masks do not offer this protection. See your local hardware
dealer for the proper N.I.O.S.H. approved mask.
3. NO EATING, DRINKING or SMOKING should be done in the
work area to prevent ingesting contaminated paint particles.
Workers should wash and clean up BEFORE eating, drinking
or smoking. Articles of food, drink, or smoking should not be
left in the work area where dust would settle on them.
Environmental Safety
1. Paint should be removed in such a manner as to minimize
the amount of dust generated.
2. Areas where paint removal is occurring should be sealed
with plastic sheeting of 4 mils thickness.
3. Sanding should be done in a manner to reduce tracking of
paint dust outside the work area.
Cleaning and Disposal
1. All surfaces in the work area should be vacuumed and
thoroughly cleaned daily for the duration of the sanding
project. Vacuum filter bags should be changed frequently.
2. Plastic drop cloths should be gathered up and disposed
of along with any dust chips or other removal debris. They
should be placed in sealed refuse receptacles and disposed
of through regular trash pick-up procedures. During clean
up, children and pregnant women should be kept away
from the immediate work area.
ENGLISH
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