Graco Inc. 223451 Paint Sprayer User Manual

18 308018
Installing and servicing this equipment
requires access to parts which may
cause an electric shock or other serious
injury if the work is not performed properly. Do not
install or service this equipment unless you are
trained and qualified.
To reduce the risk of an injury, follow the Pressure
Relief Procedure on page 13 before checking or
servicing any part of the system and whenever you
are instructed to relieve the pressure.
NOTE: Check all possible remedies in the Troubleshooting Chart before disassembling the gun.
Spray Pattern Troubleshooting
NOTE: Some spray pattern problems are caused by the improper balance between air and fluid.
Problem Cause Solution
Fluttering or spitting spray
The fluid supply is insufficient. Adjust the fluid regulator, or fill the fluid
The fluid nozzle is loose, or the fluid noz-
zle taper seat is damaged.
Tighten or replace the fluid nozzle; see
page 24.
There is dirt between the fluid nozzle,
taper seat, and gun body.
Clean the parts; see page 17.
The coupler at the fluid inlet is loose or
Tighten or repair the coupler.
Loose fluid tube in tank. Tighten.
Improper spray pattern
There is fluid build-up on the air cap;
partially clogged horn holes; or full air
pressure from the clean horn hole forces
the fan pattern toward the clogged end.
Clean the air cap with a soft implement or
submerge it in water and wipe it clean;
see page 17.
The electrode is bent. Straighten the electrode.
The fluid nozzle or air cap holes are dam-
Replace the damaged part; see page 24.
There is fluid buildup on the perimeter of
the fluid nozzle orifice, or a partially
clogged fluid nozzle orifice.
Remove the obstruction; never use wire
or hard instruments; see page 17.
The electrode is bent. Straighten the electrode wire.
The fan air pressure is too high. Reduce the fan air pressure.
The fluid is too thin. Increase the fluid viscosity.
There is not enough fluid pressure. Increase the fluid pressure.
The fan air pressure is too low. Increase the fan air pressure.
The fluid is too thick. Reduce the fluid viscosity.
There is too much fluid. Reduce the fluid flow. Reduce fluid pres-
sure on pressure feed guns and/or adjust
the fluid adjusting screw until proper pat-
tern is obtained.
The last coat of fluid is applied too wet. Apply a drier finish using multiple strokes.
There is too much air pressure. Decrease the air pressure.
The air pressure is insufficient. Increase the air pressure.
The spray pattern is non-uniform. Clean or replace the air cap; see page 17
or 24.