Graco 3A0420T Paint Sprayer User Manual


 
Component Identification
3A0420T 17
Air Line
Bleed-type master air valve (CA): Required in
your system to relieve air trapped between it and
the air motor when the valve is closed. Be sure the
valve is easily accessible from the pump and
located downstream from the air regulator.
Pump air regulator (CB): Controls pump speed
and outlet pressure.
Air line filter (C): 40 micron filter removes harmful
dirt and moisture from compressed air supply. Accu-
mulated water is automatically drained from the fil-
ter.
Fluid Line Accessories
Fluid Manifold (AA): Controls circulation and pump
priming.
Mix Manifold (AB): Combines A and B fluid into
one fluid line.
Circulation Handle (AC): Directs fluid flow for cir-
culation or mixing. Move to open position to relieve
fluid pressure, prime pumps, and circulate material
in hoppers. Move to closed position to spray mixed
material.
Dual Shutoff Handle (AE): Controls A and B fluid
flow for mixing and dispensing. Close before flush-
ing.
Solvent Flush Valve (AD): Controls solvent flow to
the mix manifold, hose, and spray gun.
Static mixer/gun hose kit: Thoroughly mixes the
two fluids and delivers the mixed fluid to the spray
gun. Includes static mixer and hoses to the spray
gun.
Optional Accessories
Optional Fluid Heaters (N): Heats the resin and
hardener before mixing. Improves the chemical
reaction and lowers viscosity to improve the spray
pattern.
Optional Solvent Flush Kit (G): Flushes the mix
manifold. Includes a solvent pump, mounting hard-
ware, and solvent supply hose.
Flush Before Using Equipment
The equipment was tested with lightweight oil, which is
left in the fluid passages to protect parts. To avoid con-
taminating your fluid with oil, flush the equipment with a
compatible solvent before using the equipment. See
Empty and Flush Entire System (new system or end
of job), page 29.
Trapped air can cause the pump to cycle unexpect-
edly, which could result in serious injury from splash-
ing or moving parts.