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

Warning
Always relieve the pressure from the spray gun after work is completed. The pres-
surized lines may rupture and persons standing nearby may be injured by the
escaping material.
Note
The gun must be flushed with a suitable solvent before initial commissioning to
prevent contamination of the spraying material.
Spray Pattern Test
Spray pattern tests should be performed whenever:
• the spray gun is taken into operation for the first time.
• the spraying medium is changed.
• the spray gun was taken apart for servicing or repairs.
The spray pattern can be tested using a work piece sample, a sheet of metal, card-
board or paper.
6

Spray pattern adjustments

The spray pattern of the PILOT TERRA can be changed by adjusting the gun as
follows:
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
Material
The material flow rate can be adjusted by
connection
screwing the adjusting screw in or out. The
flow rate is increased by turning the screw
anti-clockwise (screwing out) and decreased
by turning the screw clockwise (screwing in).
Air connection
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6.1

Correcting spray pattern flaws

The following table shows the settings you can use to change the spray pattern.
Spray pattern Fault
test
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
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 Cause
Material needle or nozzle soiled or
damaged
Gun is dripping
Spring bushing (N° 6) turned too
far to the back
Not enough material in material
tank
Pulsating or
Cup is tilted too much during
unsteady jet
spraying operation
Material nozzle loose or damaged
Gun keeps blo- Valve spring (N° 5.3) or
wing in off-position
valve cone (N° 5.2) damaged
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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