Spraying - Graco Mark IV HD Operation, Parts

Spraying

Start
1. Turn pressure control knob to SPRAY
position.
2. Disengage Trigger Lock.
Adjust Pressure Control
1. For best spray results with lowest
overspray, begin with the Pressure
Control Knob adjusted to the lowest
spray setting.
2. If needed, increase Pressure Control
Knob setting to the lowest spray setting
that results in an acceptable spray
pattern.
3A6342F
Spray Pattern Quality
A good spray pattern is evenly distributed as
it hits the surface.
•
Spray should be atomized (evenly
distributed, no gaps at edges).
•
Increase Pressure Control Knob if
needed until spray is even and without
gaps at edges.
•
Spray Tip may be worn or a smaller tip
may be needed.
•
Material may need to be thinned. If
material needs to be thinned follow
manufacturer's recommendations.
Good Spray Pattern
TAILS - Gaps at edges
Spraying
12 in. (30 cm)
from surface
Pressure
too low
Tip Wear
23