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WARNING
To
reduce the risk of serious bodily injury, includ-
Pressure Relief Procedure
ing fluid injection, splashing in the eyes or on the
skin,
or
injury from moving parts, always follow
when checking
or
servicing any part of the spray
this procedure whenever you shut off the pump,
spray tips, and whenever you stop spraying.
system, when installing, cleaning or changing
1.
Engage the spray gun safety latch.
2.
Shut off the air to the pump.
3.
Close the bleed-type master air valve (re-
4.
Disengage the spray gun safety latch.
5.
Hold a metal part of the spray gun firmly
to
the
side of a grounded metal pail, and trigger the
spray gun to relieve pressure.
quired
in
your system).
6.
Engage the spray gun safety latch.
7.
Open the drain valve (required in your sys-
tem), having a container ready
to
catch the
drainage.
8.
Leave the drain valve open until you are ready
to
spray again.
If
you suspect that the spray tip or hose
is
com-
pletely clogged,
or
that pressure has not been
fully relieved after following the steps above,
VERY
SLOWLY
loosen the
air
cap
or
hose end
coupling and relieve pressure gradually, then
loosen completely. Now clear the tip or hose.
WARNING
For~your safety, before operating the equipment
be sure all operators have read and fully under-
stand all the warnings, cautions and instructions
in this manual and all manuals supplied with
each component or accessory.
Flush the Pump
Before
Using
Pumps are tested with lightweight oil which
is
left in
to
protect the pump parts. To prevent contamination of
the fluid, flush the pump with
a
compatible solvent be-
fore using
it.
WARNING
Before flushing, be sure the entire system and
flushing pails are properly grounded. Refer to
Grounding
on
page
3.
Follow the Pressure
Re-
spray
tip
from
fhe gun.
Always
use
the lowest
lief Procedure
Warning
above,
and remove
the
possible fluid pressure, and maintain firm
metal-to-metal contact between the gun and
the pail during flushing to reduce the risk of fluid
eyes
or
on the
skin.
injection, static
sparking, and splashing in the
Starting and Adjusting the Pump
Be
sure the two air regulators
(507)
and the bleed-
type master air valve
(D)
are closed.
DO
NOT /NSTALL
THE SPRAY T/P
YET!
Connect the air line coupler
(503)
to the pin fitting
(502).
Open the bleed-type master air valve
(D)
and the gun
to the side of a grounded metal pail and trigger the
air regulator. Hold a metal part of the spray gun firmly
gun. Slowly open the pump air regulator until the pump
starts.
Allow
the pump
to
cycle
slowly
until all the air
ger and engage the safety latch: the pump
wiii
stall
Is
pushed Out of the fluid lines. Release the gun trig-
against the pressure.
With the pump and lines primed, and with adequate air
pressure and volume supplied, the pump will start and
stop as the spray gun is triggered and released.
Follow the Pressure Relief Procedure Warning at left,
then instail the spray tip in the gun.
Use
the pump air regulator to control the pump speed
and fluid pressure. Always
use
the lowest pressure
necessary to achieve the desired results. Higher pres-
sures waste fluid and cause premature wear of the
pump packings and spray tip.
Keep the packing nutlwet-cup
(1
14)
filled with Graco
Throat Seal Liquid
(TSL)
to help prolong the packing
The packing nut should be just tight enough to prevent
life. Check the tightness of the packing nut weekly.
leakage
-
no
tighter. Always follow the Pressure
Relief
Procedure Warning at left before adjusting the pack-
ing
nut.
pumped.
A
dry pump
will
quickly accelerate to a high
Never allow the pump to run dry of the fluid being
speed, possibly damaging itself. If your pump acceler-
ates quickly, or is running too fast, stop it immediately
empty and air has been pumped into the lines, refill the
and check the fluid supply.
If
the supply container is
fluid, being sure to eliminate all air from the fluid sys-
supply container and prime the pump and lines with
tern,
or
flush the pump as described in "Shutdown and
Care." below.
Shutdown and Care
Always foiiow the Pressure Relief Procedure Warning
at left. whenever you shut off the pump. Stop the
pump at the bottom of its stroke
to
keep fluid from
drying on the exposed displacement rod and damag-
ing the throat packings.
Always flush the pump with a compatible solvent be-
fore the fluid can dry
on
the displacement rod, and at
the end of each day.
If
you are pumping water-based
to protect
the
pump parts.
If
you
are pumping oil-
fluid, flush first with water and then with mineral spirits
based fluids, flush with mineral spirits only.
Relieve pressure and leave the mineral spirits in the
pump to prevent corrosion.
NOTE:
Due
to the vented seat
(1021.
this oumo stalls
~~ ~
.
..
only on the upstroke.
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307-917
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