Graco Magnum L10 Repair Manual page 18

Basic Troubleshooting
Problem
Pressure is set at maximum but can-
not achieve a good spray pattern.
Spray gun stopped spraying.
When paint is sprayed, it runs down
the wall or sags.
When paint is sprayed, coverage is
inadequate.
18
Cause
Reversible spray tip is in UNCLOG
position.
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.
Inlet screen is clogged.
Pump valves are worn, or debris is
clogging valve.
Material is too thick.
Hose is too long (if extra section is
added).
Suction tube is leaking.
Spray tip is clogged.
Coat is going on too thick.
Coat is going on too thin.
Solution
Rotate arrow-shaped handle on
spray tip so it points forward in
SPRAY position, see Operation
manual.
Select smaller spray tip.
Replace spray tip.
Replace extension cord. See
Grounding and Electrical Require-
ments, page 12.
Clean or replace spray gun fluid filter,
see Operation manual.
Clean or replace InstaClean™ fluid
filter, see Operation manual.
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.
c. Remove valves and check
for debris.
Thin material.
Remove section of hose.
Tighten suction tube connection.
Inspect for cracks or vacuum leaks.
Unclog spray tip, see Operation
manual.
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.
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