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11
Diagnostic Help/Troubleshooting Guide
Subject
Explanatio
Visual
Bean- shaped
jet
The fault comes from the head: slightly loosen the ring and turn
the head half a turn; if the fault is reversed, one of the side vents
is blocked or deformed.
Then clean the gun head with solvent and clear the vents
with a jet of compressed air. If this does not reverse, the
nozzle is probably damaged.
Offset jet
This deformation is due to a defect in the central jet. The
head and nozzle must be cleaned as described above.
Also check that :
•
The head is well centered on the nozzle,
•
The nozzle is not too big (needle and nozzle
must be adapted), you work with a sufficient
opening of the needle.
•
With an almost closed needle, the paint jet is not
supplied evenly in all directions.
Jet cut
The pressure of the air jets at the vents is too high for the paint
flow:
•
Reduce air to the vents by closing the control
needle. The jet is less wide.
•
Increase product flow.
Center-
loaded
jet
Inverse of the previous one:
•
Either the paint flow rate is excessive for the adopted
spraying air pressure: you must increase the spraying
air pressure and reduce the paint flow rate.
•
Either the paint is too thick: you must then thin it.
Paint jet
jerks
The gun is shooting. The phenomenon is caused by air
entering the paint circuit:
•
The container containing the product may be
empty: add paint.
•
The nozzle is not tight and does not sit well: tighten the
nozzle.
If the phenomenon persists, remove the nozzle and clean it.
•
Check that the nozzle seat and cone are not
damaged, reassemble the nozzle and lock it.
•
Check that the paint is fluid and homogeneous
enough to be vacuumed.
•
Check that the pressure gun is not used with a
suction cup.