Flush The Pump Before First Use; Starting And Adjusting The Pump - Graco A Series Instructions Manual

Flush the Pump Before First Use

The pump is tested with lightweight oil, which is left in
to protect the pump parts. If the fluid you are using
may be contaminated by the oil, flush it out with a
compatible solvent. See Flushing on page 10.

Starting and Adjusting the Pump

1. See Fig. 2. Connect the suction kit (T) to the
pump's fluid inlet. Place the tube into the fluid sup-
ply.
2. Close the air regulator (F).
3. Open the pump's bleed-type master air valve (E).
4. Hold a metal part of the gun (S) firmly to the side
of a grounded metal pail and hold the trigger open.
5. Slowly open the regulator until the pump starts.
6. Cycle the pump slowly until all air is pushed out
and the pump and hoses are fully primed.
7. Release the gun trigger and engage the safety
latch. The pump should stall against pressure.
8. If the pump fails to prime properly, open the drain
valve (M). Use the drain valve as a priming valve
until the fluid flows from the valve. Close the valve.
NOTE: When changing fluid containers with the hose
and gun already primed, open the drain valve (M) to
help prime the pump and vent air before it enters the
hose. Close the drain valve when all air is eliminated.
Operation/Maintenance
CAUTION
Do not allow the pump to run dry. It will quickly accel-
erate to a high speed, causing damage. If your pump
is running too fast, stop it immediately and check the
fluid supply. If the container is empty and air has
been pumped into the lines, refill the container and
prime the pump and the lines, or flush and leave it
filled with a compatible solvent. Eliminate all air from
the fluid system.
9. With the pump and lines primed, and with ade-
quate air pressure and volume supplied, the pump
will start and stop as you open and close the gun.
In a circulating system, the pump will speed up or
slow down on demand, until the air supply is shut
off.
WARNING
COMPONENT RUPTURE HAZARD
To reduce the risk of overpressurizing
your system, which could cause compo-
nent rupture and serious injury, never
exceed the specified Maximum Incoming Air Pres -
sure to the pump (see the Technical Data, on
pages 21 and 22).
10. Use the air regulator (F) to control pump speed
and fluid pressure. Always use the lowest air pres-
sure necessary to get the desired results. Higher
pressures cause premature tip and pump wear.