Graco Dura-Flo 2400 Instructions-Parts List Manual page 14

Flush the Pump Before First Use
The pump is tested with lightweight oil, which is left into
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 15.
Starting and Adjusting the Pump
1. Refer to the Typical Installation on page 8.
Connect the suction kit (T) to the pump's fluid inlet,
and place the tube into the fluid supply.
2. Be sure the air regulator (F) is closed. Then open
the pump's bleed-type master air valve (E). Hold a
metal part of the spray gun/dispensing valve firmly
to the side of a grounded metal pail and hold the
trigger open. Now slowly open the air regulator until
the pump starts.
3. Cycle the pump slowly until all air is pushed out and
the pump and hoses are fully primed. Release the
gun/valve trigger and lock the trigger safety. The
pump should stall against pressure when the trigger
is released.
WARNING
SKIN INJECTION HAZARD
To reduce the risk of fluid injection, do not use your
hand or fingers to cover the bleed hole on the un-
derside of the bleeder valve body (34) when priming
the pump. Use a crescent wrench to open and close
the bleeder plug (35). Keep your hands away from
the bleed hole.
4. If the pump fails to prime properly, open the bleeder
valve plug (35) slightly. Use the bleed hole on the
underside of the valve body (34) as a priming valve
until the fluid appears at the hole. See Fig. 6. Close the
plug (35).
NOTE: When changing fluid containers with the hose
and gun already primed, open the bleeder valve plug
(35) to help prime the pump and vent air before it enters
the hose. Close the plug when all air is eliminated.
14 308152
Operation/Maintenance
(AIR-POWERED PUMPS)
CAUTION
Do not allow the pump to run dry. It will quickly
accelerate to a high speed, causing damage. If the
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.
5. With the pump and lines primed, and with ade-
quate air pressure and volume supplied, the pump
will start and stop as the gun/valve is opened and
closed. In a circulating system, the pump will speed
up or slow down on demand, until the air supply is
shut off.
6. Use the air regulator to control the pump speed and
the fluid pressure. Always use the lowest air
pressure necessary to get the desired results.
Higher pressures cause premature tip/nozzle and
pump wear.
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 Pressure to the pump (see the
Technical Data section on pages 36–41).