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11
307–636
Operation
WARNING
T
o reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure
on page 10.
NOTE:
Contact your Graco distributor for information
on training aids available from Graco.
To Operate the Pump
Be
sure the air regulators and bleed–type master air
valve are closed.
DO NOT INST
ALL THE SPRA
Y TIP
YET!
Fill the pail (50) with fluid. Open the bleed–type master
air valve (L) in the main air line, then open the gun air
regulator (B). Hold a metal part of the spray gun (70)
firmly to the side of a grounded metal pail and trigger
the gun. Open the pump’s bleed–type master air valve
(J). Slowly open the pump air regulator (K) until the
pump starts. Allow the pump to cycle slowly until all the
air is pushed out of the fluid lines. Release the gun
trigger and lock the trigger safety; the pump will stall
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.
Relieve the pressure
, then install the spray tip in the
gun (see manual 308–640, supplied).
Use the pump air regulator (K) to control the pump
speed and fluid pressure. Always use the lowest
pressure necessary to achieve the desired results.
Higher pressures waste fluid and cause premature
wear of the pump packings and spray tip.
Keep the wet–cup filled with Graco Throat Seal Liquid
(TSL) or other compatible solvent, to help prolong the
packing life.
Never allow the pump to run dry of the fluid being
pumped. A dry pump will quickly accelerate to a high
speed, possibly damaging itself. If your pump acceler
-
ates quickly
, or is running too fast, stop it immediately
and check the fluid supply
. If the supply container is
empty and air has been pumped into the lines, refill the
supply container and prime the pump and lines with
fluid, being sure to eliminate all air from the fluid sys
-
tem, or flush the pump as described in “Shutdown and
Care”.
AA2000 Spray Gun Operation
Refer
to the OPERA
TION section of manual 308–640,
supplied, for installing the spray tip, adjusting the spray
pattern and using the AA Plus Gun.
Control the air pressure to the gun with the gun air
regulator (B).
Control the fluid pressure to the gun with the fluid
regulator
, if used. Otherwise, adjust the air pressure to
the pump motor to control fluid pressure.
Shutdown and Care
Relieve
the pressure
whenever you shut of
f the
pump. Stop the pump at the bottom of its stroke to
keep fluid from drying on the exposed displacement
rod and damaging throat packings.
Always flush the pump with a compatible solvent
before the fluid can dry on the displacement rod, and
at the end of each day
. If you are pumping water–
based fluid, flush first with water and then with mineral
spirits to protect the pump parts. If you are pumping
oil–based fluids, flush with mineral spirits only
.
Relieve pressure and leave the mineral spirits in the
pump to prevent corrosion.
Manual Air Motor Lubrication
To
lubricate the air motor manually, first
relieve the
pressure
. Then remove the air inlet fitting from the
motor air inlet. Place 10–15 drops of oil in the inlet,
reinstall the air inlet fitting and apply air to the motor
.
Do this daily for the best corrosion protection.