Spray Pattern Troubleshooting - Graco 233670 Instructions-Parts List Manual

WARNING
INJECTION HAZARD
To reduce the risk of an injection injury,
follow the Pressure Relief Procedure
on page 9 before checking or servicing
any of the system equipment and whenever you
are instructed to relieve pressure.
General Troubleshooting (continued)
Problem
Fluid does not shut off.

Spray Pattern Troubleshooting

Problem
Fluttering spray
Spitting spray
Irregular pattern
Troubleshooting
Cause
Piston cap (18) is not fully tightened.
Spring (19) is not in place.
Swollen piston o-ring (22).
Cause
Insufficient fluid supply
Air in paint supply line
Worn seat (10) or needle (12) ball.
Dirty spray tip (9).
Swollen piston o-ring (22).
Fluid build-up or spray tip partially
plugged
Solution
Tighten piston cap until it bottoms
out.
Check that spring is in position.
Replace o-ring (22). Do not immerse
piston in solvent.
Solution
Adjust fluid regulator or fill fluid supply
tank.
Check, tighten siphon hose connec-
tions, bleed air from paint line.
Inspect seat and needle for wear.
Replace if necessary. The gasket (11)
must be replaced whenever you re-
move the seat from the gun.
Clean.
Replace o-ring. Do not immerse pis-
ton in solvent.
Clean spray tip. See page 10.
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