Graco EM 490 Instructions-Parts List Manual page 13

Application Methods
Always hold the gun perpendicular to the surface and
the surface you are spraying. See Fig 11.
keep
the gun
at
an even
12
to 14 in.
~300-356
mm) from
Begin moving the gun
in
a horizontal direction at a
steady rate. Start the spray stroke off the target surface
and pull the trigger
as
the gun is moving. Then, while
the gun is still moving, and as you approach the other
edge, release the trigger. This method avoids excess
paint buildup at the end of each stroke.
gun
tip
size. A small tip orifice applies
less
paint
and a
The best way to control the rate of coverage is with the
narrower pattern. A larger tip orifice applies more paint
and a wider pattern.
Do not try to increase coverage by increasing the fluid
pressure1 Using the lowest pressure necessary to get
the desired results will help prolong the life of your
sprayer and minimize paint lost by overspray.
For interior corners, such as on a bookcase or inside a
cabinet, aim the gun toward the center of the corner to
spray. By dividing the spray pattern this way, the edges
on both sides are sprayed evenly. See Fig 13.
RIGHT
I
WRONG
I
Fig 11
The correct speed for moving the gun will allow a full,
wet coating to be applied without runs or sags. Lapping
each stroke about
5 0 %
over the previous stroke pro-
duces uniform paint thickness. And spraying in a
uniform pattern alternately from right to left, then left to
right,
provides a professional finish. See Fig 12.
Fig 13
If there is a wind, angle the spray pattern into the wind
to minimize drifting. Paint from the ground to the roof.
Shrubs. When next to the house, tie back shrubs from
the surface to be painted with rope and stakes. Then
cover them with a canvas dropcloth as the painter ap-
proaches the area. Remove the canvas droDcloth as
soon as the area is painted, to prevent possible damage
to the shrubs.
cover them with a canvas dropcloth to avoid slipping.
Concrete walks. If the walkways will be walked on,
Otherwise a plastic dropcloth is all that is needed.
with masking tape. Cover lamps with plastic bags
Electrical outlets and lamps. Protect electrical outlets
secured with masking tape.
Nearby objects. Move objects such as automobiles, pic-
nic tables, lawn furniture, etc. upwind of the surface to
tective barrier by hanging plastic between two long
be sprayed. In the case of a nearby home, make a pro-
poles.
\
Fig 12
307-735
13