Correcting Spray Pattern Flaws; Troubleshooting And Fault Rectification - Walther PILOT TERRA Instrucciones De Servicio

6.1

Correcting spray pattern flaws

The following table shows the settings you can use to change the spray pattern.
Spray pattern
test
7

Troubleshooting and fault rectification

Warning
Prior to any seervicing and repair work: Make sure that the spray gun is in unpres-
surized condition, i.e. air input must be shut off - if not, imminent risk of injury.
Fault
Gun is dripping
Pulsating or
unsteady jet
Gun keeps blo-
wing in off-position
Fault
Spray pattern is split in
the centre
Spray pattern is too thick
at the ends
The spray pattern shows
rather large droplets
Material application in
the centre of the spray
pattern is very thin
Spray pattern is split in
the centre
Spray pattern is very
spherical
Cause
Material needle or nozzle soiled or
damaged
Spring bushing (N° 6) turned too
far to the back
Not enough material in material
tank
Cup is tilted too much during
spraying operation
Material nozzle loose or damaged
Valve spring (N° 5.3) or
valve cone (N° 5.2) damaged
29
desired spray result
Required adjustment
• setting a wider spray pattern
• Setting a more rounded spray
pattern
• Increase the nozzle air pres-
sure
• Decrease the nozzle air pres-
sure
• Increase the nozzle diameter
• Reduce nozzle air pressure
• Increase material pressure
• Reduce material pressure
• Increase nozzle air pressure
Remedy
• Clean or replace
• Adjust by turning
clockwise
• Top-up material level
• Keep it level
• Fasten or replace
• Replace