Graco Inc. 289247 用户手册

One side of air cap (1) dirty or 
clogged.

Clean air cap orifices. See page 6. Blow 
air through orifices until clean. If air cap 
holes are damaged, replace air cap.

a. Loose air cap (1).

a. Tighten.

b. Dried or damaged air 

cap (1) or fluid nozzle (2).

b. Rotate air cap 180°.

If pattern follows air cap, problem is 
in air cap. Clean and inspect. See 
page 6. If pattern is not corrected, 
replace air cap.
If pattern does not follow the air cap, 
the problem is with the fluid nozzle. 
Clean and inspect the nozzle. See 
page 6. If the pattern is not corrected, 
replace nozzle.

a. Atomization air pressure 

set too high.

a. Reduce air pressure.

b. Spraying a thin material in 

too wide of a pattern.

b. Increase material control by turning 

fluid adjustment knob (8-2) counter-
clockwise while reducing spray width 
by turning pattern adjustment 
knob (5) clockwise.
Or increase material viscosity.

Air getting into paint stream.

a. Cup almost empty.

a. Fill cup.

b. Dry needle packing (3-1, 

3-2).

b. Loosen packing seat and put a few 

drops of machine oil on packing (3-1, 
3-2). Retighten seat (4).

c. Fluid nozzle (2) too loose.

c. Tighten.

d. Dried material between 

nozzle (2) and gun body.

d. Clean nozzle and front of gun. See 

e. Damaged needle seal.

e. Replace seal. See page 8.

Other spray pattern 
problems.

a. Gun not properly adjusted.

a. See page 5.

b. Sluggish needle (10).

b. Clean and lubricate.

Unable to get round 
pattern.

Pattern adjustment knob (5) 
not seating properly.

Clean or replace knob.

Will not spray.

a. No air pressure at gun.

a. Check air supply and air lines.

b. Cup empty.

b. Fill cup.

c. Fluid adjustment knob (8-2) 

turned too far clockwise.

c. Adjust knob (8-2) counterclockwise.

d. Fluid too thick for gravity 

feed.

d. Thin material.

Spitting