Graco AA2000 User Manual download pdf (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

Fluid leakage from back

Worn packings or needle shaft.

Replace packings (47) or

of fluid needle

needle (5). See page 12.

Air leakage from front

of gun

Fluid leakage from front

of gun.

Fluid in air passages from

air holes in cap.

Air valve (52) not seating properly.

Needle worn or damaged.

Worn diffuser housing.

Fluid tip seal leaking.

Fluid inlet fitting leaking.

Clean, service. See page 12.

Replace fluid needle (5).

See page 12.

Replace diffuser housing (30).

See page 12.

Tighten or replace tip (28).

Replace gasket (33). The gasket (33)

must be replaced if the fluid fitting

(67) is removed.

Spray Pattern Troubleshooting

PROBLEM:

IMPROPER SPRAY

PATTERN

Fluttering or spitting spray

Irregular pattern

Pattern pushed to one side,

same side of air cap gets

dirty.

CAUSE

Insufficient fluid supply.

Air in paint supply line.

Fluid build-up or spray tip

partially plugged.

On defective side of pattern, air horn

holes are partially or totally plugged.

Air horn holes partially or totally

plugged.

SOLUTION

Adjust fluid regulator or fill fluid

supply tank.

Check, tighten siphon hose

connections, bleed air from

paint line.

Clean spray tip. See page 10.

Clean air horn holes with solvent

and soft brush. See page 10.

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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Graco AA2000 User Manual Page 11

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