6.2
Cleaning Complete
The spray gun should be frequently cleaned and lubricated to ensure a long servi-
ce life and functional reliability.
Caution
Never immerse the spray gun in solvent or any other cleaning solution as such
measure is very likely to affect the functional reliability and efficiency of the gun.
Caution
Do not use any hard, pointed or sharp-edged objects when cleaning the spray
gun, as the precision-made parts can easily be damaged and are likely to affect
your spraying results.
Clean the gun only with cleaning solutions recommended by the manufacturer of
the spraying material which do not contain any of the following constituents:
• halogenated hydrocarbons
(e.g. 1,1,1-trichloroethane, methylene chloride, etc.)
• acids and acidiferous cleaning solutions
• regenerated solvents (so-called cleaning dilutions)
• paint removers.
The above constituents cause chemical reactions with electroplated components
resulting in corrosion damage.
WALTHER PILOT is not responsible for damages resulting from this kind of treat-
ment.
Clean the spray gun
• prior to each change of the spraying medium
• at least once a week
• as often as may be required by the spraying medium handled and the resultant
degree of fouling.
Performing these steps will ensure safe gun operation.
1. Dismantle the spray gun accordaning to 5.5 Retooling of Spray Gun.
2. Use a soft brush together with a compatible cleaning solution to clean the air
cap and nozzle.
3. Use a suitable cloth with a compatible cleaning solution to clean the gun body
and all remaining parts.
4. Apply a thin layer of grease to the following parts:
• material control needle
• needle spring
• all sliding parts and bearing points
• The moveable interior parts have to be greased at least once a week.
• The springs have always to be coated with a thin layer of grease.
Make sure to use a non-acidic, non-resinogenic grease and apply this with a soft
brush. Afterwards, assemble the spray gun in reverse order.
5.6
Correction of Spray Pattern Imperfections
The table below shows what to do to correct a spray pattern.
6
Cleaning and Maintenance
6.1
Safety Instructions
• Make sure that the spray gun is in unpressurized condition, i.e. the air input must
be shut off - if not, imminent risk of injury.
• Open fires, naked lights and smoking is prohibited in the working area. There is an
increasing risk of fire and explosion, when spraying readily flammable media (such
as cleaning solutions).
• Observe all processing specifications and safety warnings issued by the manufactu-
rer of cleaning media. Especially aggressive and acidiferous media represent risks
and hazards to personal health.
8
9
desireable spray-painting result
l
l
Spray Pattern
Fault
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
Crowned centre
• Decrease material pressure
• Increase atomising air pressure
