Graco Inc 312579H important safety instructions Troubleshooting, Cause Solution, Right, Wrong

Problem

Cause

Solution

Spray Pattern

Normal pattern.

No action necessary.

Right

Spray Pattern

Dirty or damaged air cap or fluid

Rotate air cap 180°.

nozzle.

If pattern follows air cap, problem is in air

cap (13). Clean and inspect. If pattern is

not corrected, replace air cap.

Wrong

If pattern does not follow the air cap, the

Heavy top

problem is with the fluid nozzle. Clean

or bottom

and inspect the nozzle. If the pattern is

not corrected, replace nozzle.

Spray Pattern

Pressure too high for viscosity of

Reduce air pressure and increase mate-

material being sprayed.

rial viscosity.

Correct pattern by narrowing fan size with

Wrong

fluid control valve (8).

Split pattern

Spray Pattern

Dirty or distorted air horn holes.

Clean and inspect air cap. If pattern is not

corrected, replace air cap.

Wrong

Gun spitting

Air getting into paint stream.

Check if cup is empty and fill.

Tighten fluid nozzle (11).

Check and tighten needle packing nut (17).

Check fluid nozzle (11) for damage.

Replace fluid inlet gasket (3)

Damaged fluid nozzle seal (19).

Replace seal (19).

Will not spray

Cup is empty.

Fill cup.

Fluid control valve (8) turned too

Adjust valve (8) counterclockwise.

far clockwise.

12

312579H