7
OPERATION
To reduce the risk of serious bodily injury, including
fluid injection, splashing in the eyes or on the skin, or
injury from moving parts, always follow the
Pres-
sure Relief Procedure Warning
on page 8 when-
ever you shut off the pump, when checking or serv-
icing any part of the spray/dispensing system, when
installing, cleaning or changing spray tips or noz-
zles, and whenever you stop spraying.
WARNING
Fill the wet–cup (101) one–half full with Graco Throat
Seal Liquid (TSL).
Flush the Pump
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 sol-
vent before using the pump.
For your safety ,
read the warning section,
FIRE
OR EXPLOSION HAZARD
on page 5 before flush-
ing, and follow all the recommendations given there.
WARNING
Start and Adjust the Pump
Be sure the air regulator (H) is closed. Then open the
bleed–type master air valve (G). Hold a metal part of the
spray gun firmly to the side of a grounded metal pail and
hold the trigger open. Now slowly open the air regulator
until the pump starts. See the
TYPICAL INSTALLATION
on page 6.
Cycle the pump slowly until all the air is pushed out and
the pump and hoses are fully primed. Release the spray
gun trigger and engage the safety latch. The pump will
stall against pressure when the trigger is released.
Moving parts can pinch or amputate your fingers or
other body parts. When the pump is operating, the
priming piston (Q) (located at the pump intake) and
the air motor piston (located behind the air motor
shield) move. Therefore, NEVER operate the pump
with the air motor shield removed, and keep your fin-
gers and hands away from the priming piston.
Before attempting to clear an obstruction from the
priming piston (Q) or service the pump, follow the
Pressure Relief Procedure Warning
on page 8 to
prevent the pump from starting accidentally.
WARNING
If the pump fails to prime properly, open the bleeder valve
(139) slightly. Use the bleeder hole (P) as a priming valve
until the fluid appears at the hole. See Fig 2. Close the
bleeder valve.
To reduce the risk of fluid injection, DO NOT use
your hand or fingers to cover the bleeder hole when
priming the pump.
WARNING
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 opened and closed.
Use the air regulator to control the pump speed and the
fluid pressure. Always use the lowest air pressure neces-
sary to get the desired results. Higher pressures cause
premature tip/nozzle and pump wear.
To reduce the risk of overpressurizing your system,
which could result in component rupture and cause
serious bodily injury ,
NEVER exceed 7 bar (100
psi) MAXIMUM INCOMING AIR PRESSURE to
the pump.
WARNING
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. A pump runaway valve,
which shuts off the air supply to the pump if the pump ac-
celerates beyond the pre–set speed, is available. See
ACCESSORIES
on page 18. If your pump accelerates
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 container
and prime the pump and the lines with fluid, or flush and
leave it filled with a compatible solvent. Be sure to elimi-
nate all air from the fluid system.
Fig 2
Q
P
139
101
Содержание Power-Flo Series
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