DÖRR EcoGun AL MAN 300, Operation Manual

Page: 20 / 44

NOTICE!
Property damage due to improper han-
dling
Mechanical load can damage needle and
nozzle.
– Handle with care during installation
and dismantling.
– Do not subject the needle to any
mechanical pressure.
– Avoid collisions of components to be
assembled and disassembled with the
needle.
– Do not excessively tighten compo-
nents.
8.2 Defects table
The position numbers of the components refer to the chapter Ä 11.1 “Replacement
parts”.
Fault description Cause Remedy
Spray jet falls off. Filter (28) is clogged.
Clean the filter.
Ä
7.2 “Cleaning”
Material viscosity is too high.
Thin down the material. Use a wide
mesh filter or none at all.
Material pressure is too low.
Raise the feed rate to the pump.
Not enough material. Filter (28) is blocked.
Clean the filter. Replace filter, if
necessary. Ä 8.3.4 “Replace filter”
Nozzle (1) is too small.
Use a larger nozzle.
Material pressure is too low.
Raise the feed rate to the pump.
Colorations occur. Material particles in the filter
(28) Clean the filter. Replace filter, if
necessary. Ä 8.3.4 “Replace filter”
Spray gun sprays on
closing. Shut-off needle (4 or 6) or
nozzle seal seat (3 or 5) is
worn out.
Replace shut-off needle and nozzle
seal seat Ä 8.3.3 “Replace needle
and seals.”.
Material escapes at the
needle gland. Shut-off needle (4 or 6) is
worn out. Replace shut-off needle Ä 8.3.3
“Replace needle and seals.”.
Needle gland (8) is worn out.
Replace needle gland Ä 8.3.3
“Replace needle and seals.”.
Retainer lever is difficult
to drive. Trigger pin (18) is too dry.
Lubricate trigger pin and bore in the
housing Ä 7.3.3 “Lubricate trigger
pin.”.
Faults
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