Troubleshooting

Troubleshooting

 

 

 

 

Problem

Cause

Solution

 

 

 

 

One side of air cap (1) dirty or

Clean air cap orifices. See page 6. Blow

 

clogged.

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

b. Rotate air cap 180°.

 

cap (1) or fluid nozzle (2).

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

a. Reduce air pressure.

 

set too high.

 

 

 

 

 

b. Spraying a thin material in

b. Increase material control by turning

 

too wide of a pattern.

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.

 

 

 

Spitting

b. Dry needle packing (3-1,

b. Loosen packing seat and put a few

 

3-2).

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

d. Clean nozzle and front of gun. See

 

nozzle (2) and gun body.

page 6.

 

 

 

 

e. Damaged needle seal.

e. Replace seal. See page 8.

 

 

 

Other spray pattern

a. Gun not properly adjusted.

a. See page 5.

problems.

 

 

b. Sluggish needle (10).

b. Clean and lubricate.

 

 

 

 

Unable to get round

Pattern adjustment knob (5)

Clean or replace knob.

pattern.

not seating properly.

 

 

 

 

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)

c. Adjust knob (8-2) counterclockwise.

 

turned too far clockwise.

 

 

 

 

 

d. Fluid too thick for gravity

d. Thin material.

 

feed.

 

 

 

 

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Graco Inc 288891, 289240, 289242, 288890, 289239, 288895, 289241, 289237, 289238, 288896 Troubleshooting, Problem Cause Solution