34
35
•
paint removers
The above-mentioned constituents cause chemical reactions on electroplated com-
ponents, resulting in corrosion damage.
Clean the spray gun
•
before each change of spraying material
•
at least once a week or
•
several times a week if required by the spraying medium and depending on the
degree of fouling.
Complete Cleaning
1. Disassemble the spray gun
2. Clean the air cap and the material nozzle with a soft brush and cleaning fluid.
3. Clean all other components and the gun body with a soft cloth and cleaning fluid.
4. Coat the following parts with a thin layer of grease:
•
needle spring
•
all sliding parts and bearing points.
The moving internal parts must be greased at least once a week.
The springs should always be coated with a thin layer of grease. For this, always use
a non-acidic, non-resinogenic grease and a soft brush.
Assemble the gun again in reverse order.
8
Troubleshooting
Warning
Prior to any repairs/replacements: Make sure that the spray gun is in unpressurized
condition, i.e. the air and material input must be shut off - if not, imminent Risk of
Injury.
Fault
Cause
Remedy
Gun is dripping
Nozzle or needle damaged
Nozzle or needle clogged
Needle packing gland (item 3.1)
too tight
Replace
Clean
Loosen slightly
Pulsating or
unsteady spray jet
Level in material tank too low
Gravity cup is tilted too much
Material nozzle(item 2) loose or
damaged
Top-up
Keep straight
Tighten or Replace
Gun keeps blowing
in off-position
Valve spring (item 8) or
valve cone (item 7) damaged
Replace
8.1
Correction of Spray Pattern Imperfections
The following table shows how to correct a defective spray pattern.
Spray pattern
test
Fault
Necessary adjustment
Swollen centre
• Spray jet should be flatter
Swollen ends
• Spray jet should be rounder
Coarse pearl effect
• Increase atomising air pressure
Unduly thin paint
layer in centre
• Decrease atomising air pressure
Split centre
• Increase nozzle diameter
• Reduce atomising air pressure
• Increase material pressure
Split centre
• Decrease material pressure
• Increase atomising air pressure
9
Disposal of Cleaning and Servicing Substances
The disposal of substances used for cleaning and servicing should be in accor-
dance with local, national and international laws and directives.
Warning
Particular attention should be paid to the spray and cleaning media manufacturers‘
instructions. Improper disposal represents a serious threat to the health of humans
and animals.
Desired Spray Pattern
