Troubleshooting; Spray Pattern Troubleshooting - Graco PRO AA5500SC Instruction Manual

WARNING
ELECTRIC SHOCK HAZARD
Installing and servicing this equipment
requires access to parts which may
cause an electric shock or other serious
injury if the work is not performed prop-
erly. Do not install or service this equipment unless
you are trained and qualified.
NOTE: Check all possible remedies in the Troubleshooting Charts before disassembling the gun.

Spray Pattern Troubleshooting

NOTE: Some spray pattern problems are caused by the improper balance between air and fluid.
PROBLEM:
IMPROPER SPRAY
PATTERN
Fluttering or spitting spray
Irregular pattern
Pattern is pushed to one side;
the air cap gets dirty
Tails in pattern
Excessive paint buildup on the
air cap and tip guard
* Use the least air/fluid pressure needed for good results.

Troubleshooting

CAUSE
The fluid pressure or fluid supply is insuf-
ficient.
There is air in the fluid supply line.
There is fluid buildup on the spray tip or
the spray tip is partially plugged.
The spray tip or air cap holes are dam-
aged or worn.
The air cap holes are partially or com-
pletely plugged.
The atomization air pressure is too low.
The fluid pressure is too low.
The atomization air pressure is too high.
The fluid pressure is too low.
WARNING
INJECTION HAZARD
To reduce the risk of a serious injury,
including fluid injection, follow the Pres-
sure Relief Procedure on page 16
before doing any maintenance or service on the
gun or system.
SOLUTION
Adjust the fluid regulator, or fill the fluid tank.
Check; tighten the siphon hose connections;
bleed the air from the fluid line.
Clean the spray tip; see page 22.
Replace the damaged or worn part; see
page 32.
Clean the air cap holes with solvent and a
soft brush; see page 22.
Increase the atomization air pressure.*
Increase the fluid pressure with the gun fluid
regulator.*
Reduce the atomization air pressure.*
Increase the fluid pressure with the gun fluid
regulator.*
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