WALTHER PILOT PILOT Trend V1060103 3 Serie Mode D'emploi page 30

6.1 Correcting spray pattern flaws
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 unstea-
dy jet
Gun keeps blowing
in off-position
desireable spray-painting result
Fault
Swollen centre
Swollen ends
Coarse pearl effect
Unduly thin paint
layer in centre
Split centre
Split centre
Cause
Material needle or nozzle
soiled or damaged
Spring bushing (N° 18) tur-
ned too far to the back
Not enough material in mate-
rial tank
Cup is tilted too much during
spraying operation
Material nozzle loose or
damaged
Valve cone (N° 15) or
valve stem (N° 14) damaged
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Necessary adjustment
• Spray jet should be flatter
• Spray jet should be rounder
• Increase atomising air pressure
• Decrease atomising air pressure
• Increase nozzle diameter
• Reduce atomising air pressure
• Increase material pressure
• Decrease material pressure
• Increase atomising air pressure
Remedy
• Clean or replace
• Adjust by turning clock-
wise
• Top-up material level
• Keep it level
• Fasten or replace
• Replace