| Symptoms |
Causes |
Remedies |
The
paint does not come out regularly, i.e., spluttering
|
1-
Insufficient paint in the pot
2- The gun is too inclined
3- The paint flow is obstructed
4- The nozzle is loose or damaged
5- The viscosity of paint is too high
6- The hole of the cover is obstructed
7- The packing gland of the needle is worn or the gland nut is loosened |
1-
Fill the pot
2- Adjust
3- Clean with solvent
4- Tighten or replace
5- Reduce the viscosity
6- Clean
7- Replace or adjust |
Irregular
spray pattern (Only on one side)
 |
1-
The hole of the curved head is partially obstructed or damaged
2- Paint or dust sticks on head conical walls and on the nozzle, or
the parts are damaged
3- (X) Paint or dust sticks on upper portion of the nozzle
4- (Y) Paint or dust sticks on lower portion of the nozzle |
1-
Clean or replace
2- Clean or replace
3- Clean (X)
4- Clean (Y) |
Semicircular
spray pattern
|
1-
(X) The air cap right hole is obstructed
1- (Y) The air cap left hole is obstructed
2- (X) Paint sticks on the right side of the air cap
2- (Y) Paint sticks on the left side of the air cap
3- The air cap or nozzle holes are damaged |
1-
Clean (X) (Y)
2- Clean (X) (Y)
3- Replace |
Irregular
spray pattern
(drop pattern)
 |
1-
Damaged nozzle
2- Excessive clearance between air cap diameter and nozzle OD
3- The air passing through the air cap holes is insufficient or the
pressure is too low
4- The pressure pushing the paint (pressurized pot operation) is too
high
5- The viscosity is too high |
1-
Replace
2- Replace
3- Increase the air volume or the pressure
4- Reduce the pressure
5- Reduce the viscosity |
Irregular
spray pattern
(narrow at the centre)
|
1-
The air volume passing through the air cap holes is excessive and
the pressure is too high
2- Paint or dust deposit between head and nozzle |
1-
Reduce the air volume and
reduce the pressure
2- Clean |
Spray
centre too full
|
1-
Too much product
2- Product too thick |
1-
Use less
2- Dilute it |
Impossible
to get a round spray
|
1-
Jet support loose
2- Jet support ruined |
1-
Close it
2- Change it |
It
does not atomise
|
1-
There is no air in the gun
2- Air control valve not open properly
3- Product regulation button not open properly
4- The hole of the cover is obstructed
5- The hole of the non-drip device is obstructed |
1-
Check the air line
2- Open the air regulation valve
3- Open the product regulation valve
4- Clean and/or replace
5- Clean and/or replace |
Product
leaking out of the nozzle
|
1-
The packing nut is too tight
2- Needle is damaged
3- Needle not aligned with nozzle |
1-
Loosen it
2- Change it
3- Check or change it |
Sagging
|
1-
Too much product
2- Product too thin
3- Bad positioning of the gun |
1-
Use less
2- Add some undiluted product
3- Keep the gun perpendicular |
Too
much atomising
(overspray)
|
1-
Too much thinners
2- Too high air pressure |
1-
Add some undiluted product
2- Decrease the air pressure |
Too
much atomisation at the edges of the spray
|
1-
Too high air pressure
2- Gun too far away from the surface to be sprayed
3- Too quick and arched in movement |
1-
Decrease the air pressure
2- Move closer
3- Slow down and keep straight in movement |
Coarse
finish, dry atomisation
|
1-
Gun too far from the surface
2- Too high an air pressure |
1-
Reduce the distance
2- Decrease the air pressure |
Finish
with an “orange peel” look
|
1-
Gun too near
2- Too low an air pressure
3- Surface oxidised or greasy |
1-
Increase the distance
2- Increase the atomisation pressure
3- Clean or degrease the surface |
