Graco Tradeworks 150, Operation Manual

Page: 32 / 36

Troubleshooting
32 313381L
Pump cycles, but paint only drib-
bles or spurts when spray gun is
triggered. Pressure is set too low. Slowly turn Pressure Control
Knob clockwise to increase pres-
sure setting which will turn motor
on to build pressure.
Spray tip is clogged. Unclog spray tip, page 20.
Spray gun fluid filter is clogged. Clean or replace gun fluid filter,
page 26.
Spray tip is too large or worn. Replace tip.
Pressure is set at maximum but can-
not achieve a good spray pattern. Reversible spray tip is in UNCLOG
position. Rotate arrow-shaped handle on
spray tip so it points forward in
SPRAY position, page 20.
Spray tip is too large for sprayer. Select smaller spray tip.
Spray tip is worn beyond capability of
sprayer. Replace spray tip.
Extension cord is too long or not
heavy enough gauge. Replace extension cord. Grounding
and Electrical Requirements, page
11.
Spray gun fluid filter is clogged. Clean or replace spray gun fluid filter,
page 26.
Inlet screen is clogged. Clean debris off inlet screen.
Pump valves are worn or clogged
with debris. Check for worn pump valves.
a. Prime sprayer with paint
b. Trigger gun momentarily.
When trigger is released,
pump should cycle momen-
tarily and stop. If pump con-
tinues to cycle, pump valves
may be worn.
c. Remove valves and check
for debris.
Material is too thick. Thin material.
Hose is too long (if extra section is
added). Remove section of hose.
Spray gun stopped spraying. Suction tube is leaking. Tighten suction tube connection.
Inspect for cracks or vacuum
leaks.
Spray tip is clogged. Unclog spray tip, page 20.
When paint is sprayed, it runs down
the wall or sags. Coat is going on too thick. Move gun faster.
Choose a tip with smaller hole size.
Choose tip with wider fan.
Make sure gun is far enough from
surface.
Problem Cause Solution