Technical data
309030 19
Troubleshooting
Spray Pattern Troubleshooting
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury, follow the Pres-
sure Relief Procedure on page 13 before checking
or repairing any part of the gun or system.
PROBLEM CAUSE SOLUTION
Fluid flow is fluttering while spraying Fluid nozzle not tight enough Tighten fluid nozzle to 125–135 in-lb
(14–15 Nm).
Fluid filter clogged Check fluid filter.
Fluid flow fades while spraying high
viscosity fluids
Air hose size is too restricted for
higher air flow being used
Use 5/16 in. (7.9 mm) I.D. air hose if
the hose is 25 ft. (7.625 m) long. If
longer hose is needed, use a 3/8 in.
(9.5 mm) I.D. hose.
Fluid pressure too low, causing fluid
flow to reduce when gun is elevated
Raise fluid pressure at source or use
a smaller fluid nozzle.
Pattern becomes off-set or heavy on
ends
Air cap horn holes plugged or dam-
aged
Clean air cap horn holes with non-
metallic item such as a toothpick, or
replace air cap.
Gun fluid pressure is too high with
gun triggered
Using needle/nozzle kit with too
small orifice
Use needle/nozzle kit with larger
orifice
Using a low fluid pressure setting,
the fluid flow is too high, making it
necessary to restrict needle travel to
reduce fluid flow
Using needle/nozzle kit with too
large orifice
Use needle/nozzle kit with smaller
orifice
Fluid system will not operate at low
enough fluid pressure [below 10 psi
(70 kPa, 0.7 bar)]
There is no fluid regulator, or air
regulator on pressure pot is not sen-
sitive enough at low pressures
Add low pressure fluid regulator, or
add more sensitive low pressure air
regulator on pressure pot.