Graco HIGH EFFICIENCY LOW PRESSURE AA2000 - Manual (Page 11)

Troubleshooting
WARNING
To reduce the risk of serious injury, including fluid injection, splashing fluid or solvent in the eyes or on the
skin, or injury from moving parts, always follow the Pressure Relief Procedure Warning on page 10 when­
ever you shut off the pump, when checking or servicing any part of the spray system, when installing, clean­
ing or changing spray tips, and whenever you stop spraying.
NOTE: Check all possible remedies in the Troubleshooting Charts before disassembling the gun.
General Troubleshooting
PROBLEM: CAUSE SOLUTION
Fluid leakage from back
of fluid needle Worn packings or needle shaft. Replace packings (47) or
needle (5). See page 12.
Air leakage from front
of gun Air valve (52) not seating properly. Clean, service. See page 12.
Fluid leakage from front
of gun.
Needle worn or damaged. Replace fluid needle (5).
See page 12.
Worn diffuser housing. Replace diffuser housing (30).
See page 12.
Fluid in air passages from
air holes in cap. Fluid tip seal leaking. Tighten or replace tip (28).
Fluid iniet fitting ieaking. Replace gasket (33). The gasket (33)
must be replaced if the fluid fitting
(67) is removed.
Spray Pattern Troubleshooting
PROBLEM:
IMPROPER SPRAY
PATTERN
CAUSE SOLUTION
Fluttering or spitting spray Insufficient fluid supply. Adjust fluid regulator or fill fluid
supply tank.
>
Air in paint supply line. Check, tighten siphon hose
connections, bleed air from
paint line.
Irregular pattern Fluid build-up or spray tip
partially plugged. Clean spray tip. See page 10.
On defective side of pattern, air horn
holes are partially or totally plugged. Clean air horn holes with solvent
and soft brush. See page 10.
Pattern pushed to one side,
same side of air cap gets
dirty. Air horn holes partially or totally
plugged.
Clean air horn holes with solvent
and soft brush. See page 10.
NOTE: Some improper patterns are caused by the improper balance between air and fluid.
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