Spraying Techniques; Getting Started; Triggering Gun; Aiming Gun - Graco A Series Manual

Spraying Techniques

Preventing Excessive Tip Wear
• Spray should be atomized (evenly distributed, no
gaps at edges). Start at low pressure setting,
increase pressure a little at a time until you see a
good spray pattern, without tails.
• Spray at lowest pressure that atomizes paint.
• If maximum sprayer pressure is not enough for a
good spray pattern, tip is too worn. See Reversible
Spray Tip Selection Chart, page 17.
tails - gaps
at edges
pressure
too low
NOTE: If tails persist when spraying at the highest pres-
sure, a smaller tip is needed or the material may need to
be thinned.
Adjust Spray Pressure
This sprayer is set up for most airless spraying applica-
tions. Details on tip selection, tip wear, coat thickness,
etc. are provided on page 17.
NOTE: Motor only runs when gun is triggered. Sprayer
is designed to stop pumping when gun trigger is
released.
Align setting indicator with function symbol on Pressure
Control knob, page 11.
• Turning knob to the right (clockwise), increases
pressure at gun.
• Turning knob to the left (counter-clockwise),
decreases pressure at gun.
3A1782D
good
spray pattern

Getting Started

Use a piece of scrap cardboard to practice these basic
spraying techniques before you begin spraying the sur-
face.
• Hold gun 30 cm (12 in.) from surface and aim
straight at surface. Tilting gun to direct spray angle
causes an uneven finish.
12 in.
(30 cm)
• Flex wrist to keep gun pointed straight. Fanning gun
to direct spray at angle causes uneven finish.
ti17231a

Triggering Gun

Pull trigger after starting stroke. Release trigger before
end of stroke. Gun must be moving when trigger is
pulled and released.

Aiming Gun

Aim tip of gun at bottom edge of previous stroke, over-
lapping each stroke by half.
Thick
Uneven
Finish
Thin
ti17233a
ti17234a
ti17498a
Setup
ti17232a
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