Graco Inc. 237-296 - Manual (Page 6)

6 308-425
Setup
Supplied Components
Refer to Fig. 2.
WARNING
A red-handled bleed-type master air valve (F) and
a fluid drain valve (D) are supplied. These accesso-
ries help reduce the risk of serious injury, including
fluid injection and splashing of fluid in the eyes or
on the skin, and injury from moving parts if you are
adjusting or repairing the pump.
The bleed-type master air valve relieves air trapped
between this valve and the pump after the air is
shut off. Trapped air can cause the pump to cycle
unexpectedly. Locate the valve close to the pump.
The fluid drain valve assists in relieving fluid pres-
sure in the displacement pump, hose, and gun.
Triggering the gun to relieve pressure may not be
sufficient.
D The red-handled bleed-type master air valve (F)
is required in your system to relieve air trapped
between it and the air motor when the valve is
closed (see the WARNING above). Be sure the
bleed valve is easily accessible from the pump, and
is located downstream from the air filter/regulator
(H).
D The air filter/regulator (H) controls pump speed
and outlet pressure by adjusting the air pressure to
the pump. It also removes harmful dirt and moisture
from the compressed air supply. Locate close to the
pump, but upstream from the bleed-type master air
valve (F).
D The air manifold (J) provides ports for connecting
lines to air-powered accessories.
D The air relief valve (38) opens automatically to
prevent overpressurization of the pump.
D The fluid filter (4) or surge tank includes a 60
mesh (250 micron) stainless steel element to filter
particles from the fluid as it leaves the pump. It
includes the fluid drain valve (D), which is re-
quired in your system to relieve fluid pressure in the
hose and gun (see the WARNING at left).
D The suction hose (8) and tube (7) allow the pump
to draw fluid from a 5 gallon (19 liter) pail.
Connect the Fluid Hoses and Gun
NOTE: Models 237–296 and 238–906 include fluid
hoses, a spray gun, and connecting parts (ref. nos.
102–106). If you supply your own fluid hoses and gun,
be sure they are properly sized and pressure-rated for
your system. Use only electrically conductive hoses.
1. Connect the main fluid hose (103) to the fluid filter
(4) outlet.
2. Screw the coupling (105) onto the other end of the
main fluid hose (103).
3. Screw the short whip hose (104) onto the coupling
(105).
4. Screw the whip hose (104) onto the gun swivel
(106).
5. Screw the gun swivel (106) onto the fluid inlet of
the spray gun (102).