Gun Operation Troubleshooting - Graco PRO Auto Xs Instructions-Parts List Manual

Gun Operation Troubleshooting

Problem
Excessive spray fog.
"Orange Peel" finish.
Fluid leaks from the fluid packing
area
Air leaks from the air cap
Fluid leakage from the front of the
gun
Gun does not spray
Dirty air cap
Air leaks from manifold
Fluid leaks at the quick-disconnect.
309457G
Cause
Atomizing air pressure too high.
Fluid too thin.
Atomizing air pressure too low.
Poorly mixed or filtered fluid.
Fluid too thick.
Worn packings or rod.
Worn piston stem o-rings (34e, 34f).
Worn or damaged packing rod (8).
Worn fluid seat.
Loose fluid nozzle (4).
Damaged nozzle o-ring (4b).
Low fluid supply.
Damaged air cap (3).
Dirty or clogged fluid nozzle (4).
Damaged fluid nozzle (4).
Piston (34) not actuating.
Actuator arm (29) is out of position.
Misaligned air cap (3) and fluid noz-
zle (4).
Damaged nozzle orifice.
Fluid is coming on before the air.
Manifold is not tight.
Manifold is not tight.
Fluid hose o-rings are worn or miss-
ing.
Hose not seated properly.
Troubleshooting
Solution
Decrease air pressure as low as pos-
sible.
Increase viscosity.
Increase air pressure; use lowest air
pressure necessary.
Remix or refilter fluid.
Reduce viscosity.
Replace packings or rod; see pages
43 or 44.
Replace; see page 45.
Replace; see page 43
Replace fluid nozzle (4) and/or elec-
trode needle (7); see pages 41 to 42.
Tighten; see page 41.
Replace; see page 41.
Add fluid if necessary.
Replace; see page 41.
Clean; see page 41.
Replace; see page 41.
Check cylinder air. Check piston
u-cup (34d); see page 45.
Check actuator arm and nuts. See
page 46.
Clean fluid buildup off air cap and
fluid nozzle seat; see page 28.
Replace nozzle (4); see page 41.
Check actuator arm and nuts. See
page 46.
Tighten manifold screws (106).
Tighten manifold screws (106).
Inspect or replace o-rings.
Make sure the hose was stripped and
installed correctly. See page 14.
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