Operation - Graco 231–034 Instructions And Parts List

Use this procedure each time you start the sprayer to
help ensure that the sprayer is ready to operate and
that you start it safely.
WARNING
To reduce the risk of a serious injury, follow the
Pressure Relief Procedure on page 4 whenever
you are instructed to relieve the pressure.
66
99
72
Fig. 3
NOTE: Flush the sprayer if this is a first-time startup.
See page 15.
NOTE: See Fig. 3 except where noted.
1. Plug in the sprayer.
2. Close the pressure drain valve (74). If you did not
install a second hose, be sure the nipple (40) is
tightly plugged with the cap (72).
3. Put the suction tube into the paint container.
4. Turn the pressure–adjusting knob (C) fully counter-
clockwise to the minimum pressure.

Operation

B
C
74
66b
CAUTION
Do not operate the pump without fluid in it for more
than 30 seconds, to avoid damage to the pump
packings.
WARNING
To reduce the risk of static sparking and splashing
when flushing, always remove the spray tip from
the gun and hold a metal part of the gun firmly to
the side of a grounded metal pail.
5. Prime the pump.
a. Open the pressure drain valve. Turn on the
sprayer. Slowly turn the pressure–adjusting
knob clockwise until the sprayer starts. When
the fluid comes from the drain hose, close the
valve.
b. Unlock the gun trigger safety. See reference A
in Fig. 4. Follow the warning, above, and trig-
ger the gun until all air is forced out of the
system and the fluid flows freely from the gun.
c. Release the trigger. Lock the gun trigger
safety. See reference B in Fig. 4.
B
Fig. 4
A