17
Trouble
Cause
Solution
No fluid out of the gun
Clogged nozzle
Cut the pressure on
the pump.
Depressurize the hoses.
Remove and clean
the nozzle with solvent
by means of the brush.
Check the seal
condition.
Pattern width narrows
during reversing phase of
the pump
Air trapped in the fluid
circuit
Check connections
and suction hose
quality.
Viscosity too high
Reduce viscosity.
Aircap becomes dirty
frequently
Too much atomizing
air
Reduce air pressure.
Fluid seeping from the air
holes of the aircap
Defective nozzle seal
Replace it.
Nozzle loose
Tighten it.
Fluid leak at the packing
Packing is worn
Tighten up the packing
holder without
blocking the needle.
If there is still a leak,
replace the packing
and the needle.
Fluid leak at the front part
of the gun, trigger released
Impurities in the paint
Trigger the gun 3 or 4
times.
Needle worn or/and
nozzle worn
Replace needle
or/and nozzle.
Air leak at the valve
Valve worn
Change the valve.
Permanent air leak at the
gun aircap when the
trigger is released
Friction on the needle
Remove the trigger
and check that the
needle slides freely.
Valve worn
Replace the valve.
