Graco MAGNUM 309225W Operation Manual page 24

Troubleshooting
Problem
Pump cycles, but paint only dribbles
or spurts when spray gun is trig-
gered.
Spray pattern is inconsistent or is
leaving stripes.
Pressure is set at maximum but
cannot achieve a good spray pattern.
Pressure is set at maximum but
cannot achieve a good spray pattern.
Pressure is set at maximum but
cannot achieve a good spray pattern.
When paint is sprayed, it runs down
the wall or sags.
When paint is sprayed, coat is not
covering.
When paint is sprayed, coat is not
covering.
24
Cause
Pressure is set too low.
Spray tip is clogged.
InstaClean fluid filter is clogged (XR
models only).
Spray gun fluid filter is clogged.
Spray tip is too large or worn.
Pressure is set too low.
Spray tip is worn beyond capability of
sprayer.
Spray tip is too large for sprayer.
Spray tip is worn beyond capability of
sprayer.
Extension cord is too long or not
heavy enough gauge.
Spray gun fluid filter is clogged.
InstaClean fluid filter is clogged (XR
models only).
Inlet screen is clogged.
Pump valves are worn.
Coat is going on too thick.
Coat is going on too thin.
Coat is going on too thin.
Solution
Slowly turn Pressure Control Knob
(C) clockwise to increase pressure
setting and verify if sprayer pressure
increases.
Unclog spray tip, page 12.
Clean or replace InstaClean fluid fil-
ter (E).
Clean or replace gun fluid filter (V).
Replace tip.
Turn Pressure Control Knob (C)
clockwise, to increase pressure.
Replace spray tip.
Select smaller spray tip.
Replace spray tip.
Replace extension cord. Grounding
and Electrical Requirements, page
5.
Clean or replace spray gun fluid filter.
Clean or replace InstaClean fluid
filter.
Clean debris off inlet screen.
Check for worn pump valves.
a. Prime sprayer with paint
b. Trigger gun momentarily.
When trigger is released,
pump should cycle
momentarily and stop. IF
pump continues to cycle,
pump valves may be worn.
Read Pump Check Valves,
page 11.
Move gun faster.
Choose a tip with smaller hole
size.
Choose tip with wider fan.
Make sure gun is far enough from
surface.
Move gun slower.
Choose tip with larger hole size.
Choose tip with narrower fan.
Make sure gun is close enough to
surface.
309225W