Troubleshooting; Spray Pattern Troubleshooting - Graco 222625 Instructions-Parts List Manual

WARNING
ELECTRIC SHOCK HAZARD
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.
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
Fluttering or spitting spray
Improper spray pattern
Streaks
18 308018

Troubleshooting

Cause
The fluid supply is insufficient.
The fluid nozzle is loose, or the fluid noz-
zle taper seat is damaged.
There is dirt between the fluid nozzle,
taper seat, and gun body.
The coupler at the fluid inlet is loose or
cracked.
Loose fluid tube in tank.
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.
The electrode is bent.
The fluid nozzle or air cap holes are dam-
aged.
There is fluid buildup on the perimeter of
the fluid nozzle orifice, or a partially
clogged fluid nozzle orifice.
The electrode is bent.
The fan air pressure is too high.
The fluid is too thin.
There is not enough fluid pressure.
The fan air pressure is too low.
The fluid is too thick.
There is too much fluid.
The last coat of fluid is applied too wet.
There is too much air pressure.
The air pressure is insufficient.
The spray pattern is non-uniform.
WARNING
PRESSURIZED EQUIPMENT HAZARD
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.
Solution
Adjust the fluid regulator, or fill the fluid
supply.
Tighten or replace the fluid nozzle; see
page 24.
Clean the parts; see page 17.
Tighten or repair the coupler.
Tighten.
Clean the air cap with a soft implement or
submerge it in water and wipe it clean;
see page 17.
Straighten the electrode.
Replace the damaged part; see page 24.
Remove the obstruction; never use wire
or hard instruments; see page 17.
Straighten the electrode wire.
Reduce the fan air pressure.
Increase the fluid viscosity.
Increase the fluid pressure.
Increase the fan air pressure.
Reduce the fluid viscosity.
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.
Apply a drier finish using multiple strokes.
Decrease the air pressure.
Increase the air pressure.
Clean or replace the air cap; see page 17
or 24.