Troubleshooting
3A8099A 25
Troubleshooting
Spray Pattern Troubleshooting
Follow Pressure Relief Procedure, page 15, before
checking or repairing the gun.
NOTE: Check all possible problems and causes before
disassembling the air cap assembly and spray tip. Air
and fluid imbalance may cause improper air patterns.
To reduce the risk of a skin injection injury, always
follow the Pressure Relief Procedure, page 15,
whenever instructed to relieve the pressure. To avoid
serious injury from skin injection, do not put your hand
in front of the spray tip when installing or removing the
air cap assembly and spray tip.
Problem Possible Causes Solutions
Why it is
important
Tails and streaks in pattern
• Tails not fully
atomized
• Tip worn
• Tip plugged
• Fluid pressure too low
• Clean tip
• Check tip wear/ flow rate
• Increase fluid pressure
• Decrease tip orifice size
• Even and
blended finish
• Even paint
thickness and
coverage
• Maintains
transfer
efficiency
• Decreases dry
spray
• Increases
cleanliness of
tip, air cap,
and gun
Uneven spray pattern
• Dirty or plugged air
cap holes
• Tip worn
• Tip plugged
• Operator spray
technique
• Clean air cap
• Clean tip
• Check tip for wear/flow
rate
• Review operator
technique
• Even and
blended finish
•Eliminates
stripes
• Even paint
thickness and
coverage
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