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Troubleshooting.
Spray
Gun
Problems
PROBLEM
No or slow fluid flow, inter-
mittent spray, or fluttering
spray
Fluid leaks at fluid nozzle
after the trigger is released
Poor spray pattern
CAUSE
Proper size fluid set is not being used.
Air cap is adjusted too far forward.
Gun
fluid
nozzle
is
not tight enough, is
aged.
blocked by dried paint,
or
is dam-
Cup or pressure pot cover is not tight
enough or gasket is damaged.
Cup or pressure pot fluid tube
blocked by dried paint or is damaged.
Air flow to cup is blocked.
Needle packings are not properly ad-
justed. Fluid
loss
though the packings
will effect fluid pressure and cause a
fluid build-up in the gun body.
flow will be restricted if there is too
Needle is not properly adjusted. Fluid
much free travel between the trigger
and needle.
Needle is not seating in the fluid
nozzle.
Air cap horn holes and/or fluid nozzle
plugged.
SOLUTION
Select the proper fluid set for the fluid
being sprayed. See pages
4
and
5.
tion. See page
10.
Adjust the air cap
to
"normal" posi-
Tighten, clean or replace fluid nozzle.
lighten cover or replace gasket.
Clean or replace fluid tube.
To
check: remove the cup (leave
cover connected), trigger the gun and
check for air flow out of the cup lower
freely, clean the air
passage tubes.
pressure tube.
If
air
is not flowing
Clean the gun body with solvent and
the brush provided. Adjust the needle
packings as instructed on page
17.
Adjust the needle as instructed on
page
16.
0
Check for
a
loose fluid nozzle or
a
bent nozzle or needle; tighten the
nozzle or replace parts as needed.
0
Check the needle adjustment; see
page
16.
0
Check the needle packings adjust-
ment; see page
17.
Soak air cap and/or fluid nozzle in
sol-
vent. Clean air cap horn holes with
non-metallic item to avoid perma-
nently damaging them. See page
15.
18
308-336