Operational Handling; Adjusting The Spray Pattern - Walther PILOT Trend Serie Instrucciones De Servicio

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Operational Handling

The following requirements must be met before the spray gun can be put into operati-
on: The air pressure must not exceed 8 bar.
1. Before using the gun, first carry out a spray pattern test. The spray pattern can
best be tested on a sample workpiece or on a sheet of metal, cardboard or paper.
2. If necessary, adjust the settings of the spray gun
Pay attention to the following safety warnings when using the spray gun!
• Always wear proper respiratory protection masks and protective overalls when
using the spray gun. Airborne particles can damage your health!
• Always wear suitable hearing protectors in the vicinity of the spray gun. The spray
guns produce sound levels of approximately 83 dB(A).
• Ensure that the working area is absolutely free from open fires and naked lights and
that smoking is strictly prohibited. The spraying of flammable liquids (e.g. paint) is
accompanied by the risk of fire and explosion.
• When spraying materials, keep hands and other parts of the body away from the
nozzle of the gun when it is under pressure. Risk of injury!
• Relieve the spray gun of all pressures when work is complete. Lines left in a pres-
surised condition might burst and their contents may injure persons standing near-
by!
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Adjusting the Spray Pattern

The spray pattern of the PILOT Trend can be changed by adjusting the gun as follo-
ws:
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Round / Wide Jet adjustment
The adjusting screw is used to adjust the width of
the spray jet. The jet can be changed to a wide jet
by turning the screw anti-clockwise (screwing out)
and to a round jet by turning the screw clockwise
(screwing in).
Setting the Material Flow Rate
The material flow rate can be adjusted by screwing
the adjusting screw in or out. The flow rate is increa-
sed by turning the screw anti-clockwise (screwing
out) and decreased by turning the screw clockwise
(screwing in).
Atomizing Air Flow Adjustments
The atomizing air input is regulated across the air
volume regulating control by adjusting knob it
inwards or outwards. The atomizing air pressure is
to be set up at the air pressure reducing valve of the
compressor system - make sure to follow relevant
instructions and SAFETY warnings!
7 Correction of Spray Pattern
desireable spray-painting result
Spray pattern test
Swollen centre
Swollen ends
Coarse pearl effect
Unduly thin paint
layer in centre
Split centre
Split centre
Troubleshooting and Corrective Action
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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
Material needle or nozzle
soiled or damaged
Gun is dripping
Spring bushing (N° 13) tur-
ned too far to the back
Not enough material in
material tank
Cup is tilted too much during
Pulsating or unsteady
jet spraying operation
Material nozzle loose or
damaged
Gun keeps blowing in Valve cone (N° 21) or
off-position
valve stem (N° 20) damaged
Fault 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
Cause Remedy
• Clean or replace
• Adjust by turning clock-
wise
• Top-up material level
• Keep it level
• Fasten or replace
• Replace
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