
Operation

I. Pressure relief procedure

The
system remains pressurized until pressure is
manually relieved. To reduce the risk of serious
injury
, including skin injection from pressurized fluid
or accidental spray from the gun, or injury due to
splashing fluid in the eyes or on the skin, follow this
procedure whenever you:
D
are told to relieve pressure;
D
stop spraying;
D
check or service any system equipment;
D
install, clean or change spray tips.
WARNING
1.
Lock the gun trigger safety
.
2.
Close the bleed-type master air valves (A,14).
3.
Close the air regulators (8a,8b).
4.
Unlock the gun trigger safety
.
5.
Hold a metal part of the gun firmly against a
grounded metal waste pail. T
rigger the gun to
relieve pressure.
6.
Lock the gun trigger safety
.
7.
Open the filter drain valve (26), having a container
ready to catch the drainage. Close the drain valve.
If you suspect that the spray tip or hose is completely
clogged or that pressure has not been fully relieved,
very slow loosen the tip retaining nut or hose end cou
-
pling and relieve pressure gradually
. Clean the tip or
hose obstruction.

II. Flush the pump before the first use.

Flush
with a solvent compatible to your fluid. Consult
the fluid manufacturer
’
s literature for recommenda
-
tions. See
Flushing
on page 10.

III. Prime the system.

See
Fig. 5.
1.
Remove the air cap and spray tip from the gun.
2.
Close the filter drain valve (26).
3.
Put the suction tube into the fluid supply container
.
4.
Make sure the air regulators (8a,8b) are closed.
5.
Open the master air valves (A,14).
NOTE:
In the next steps, the pump will cycle quickly
until air is purged.
6.
Slowly turn on the pump air regulator (8a) until the
pump cycles slowly
.
7.
Hold a metal part of the gun firmly against and
aimed into the grounded metal waste pail. T
rigger
the gun while increasing pressure at the pump air
regulator (8a) just enough to purge the air and
storage solvent from the system. When new fluid
comes from the gun, release the trigger
. Lock the
gun trigger safety
.
Fig. 5 04098
3
A
8b
8a
14
26
KEY
A Bleed-type
master air valve
3
Air-assisted airless spray gun
8a
Pump air regulator
8b
Gun air regulator
14
Bleed–type air valve
26
Filter drain valve