Symptom

Possible Cause

Solution

 

 

 

 

 

Excessive over-

1.

Fluid pressure too high.

1.

Reduce fluid pressure.

spray.

2.

Gun is too far from surface.

2.

Keep gun at recommended

 

 

 

 

distance.

 

3.

Spraying too fast.

3.

Slow down and maintain

 

 

 

 

consistent, even parallel

 

 

 

 

stroke.

 

 

 

 

 

Unable to control

1.

Pattern adjustment screw is

1.

Clean or replace.

spray fan.

 

not seating properly.

 

 

 

2.

Atomizing cap is loose.

2.

Tighten atomizing cap.

 

 

 

 

 

Runs and sags.

1.

Damaged seal.

1.

Replace damaged seals.

 

 

 

 

 

Material leaks from

1.

Cap not secure.

1.

Tighten.

cup.

2.

Cup not tight on gun body.

2.

Tighten.

 

3.

Leaking from cap vent hole.

3.

Hold gun upright do not tilt.

 

 

 

 

 

Material leaks from

1.

Fluid tip loose.

1.

Tighten.

gun.

2.

Dry or damaged seals.

2.

Replace seals.

 

3.

Excessive pressure.

3.

Reduce pressure.

 

 

 

 

 

Thick dimpled finish

1.

Holding gun too close to sur-

1.

Spray at recommended dis-

aka "Orange Peel."

 

face.

 

tance.

 

2.

Inlet air pressure too low.

2.

Check inlet air pressure.

 

3.

Material not properly mixed.

3.

Follow manufacturer's

 

 

 

 

instructions.

 

4.

Surface is dirty or oily.

4.

More surface prep is

 

 

 

 

required.

 

 

 

 

 

Dry Spray.

1.

Inlet air pressure too high.

1.

Lower inlet air pressure.

 

2.

Gun too far from surface.

2.

Keep gun at recommended

 

 

 

 

distance.

 

3.

Gun stroke too fast.

3.

Slow down and maintain

 

 

 

 

consistent even parallel

 

 

 

 

stroke.

 

 

 

 

Gun leaks from

1.

Debris will not let the needle

1. Clean or replace both.

fluid tip.

 

seat with the fluid tip.

 

 

 

 

 

 

 

Contaminated

1.

Water or oil in the air line.

1.

Install an in-line air filter.

paint, aka "Fish

 

 

2.

Replace air line.

Eyes.

 

 

 

 

 

 

 

 

 

Model H7671/H7672 HVLP Spray Gun

-15-

Page 17
Image 17
Grizzly H7671 instruction manual Symptom Possible Cause Solution