Graco GM3000 Instructions-Parts List Manual page 13

How to Flush
CAUTION
When changing fluids, do not drain all of the first fluid
from the suction tube before inserting the suction tube
into the another fluid. Not doing so may introduce
excessive air into the pump and cause the pump to
lose prime.
After moving the suction tube to a new fluid, pump the
first fluid and any trapped air, out through the drain
valve before beginning to pump the new fluid to the
guns.
NOTE: The word solvent refers to water or oil-based
solvent.
1. Follow the Pressure Relief Procedure, page 12.
2. Remove the filter bowl and screen; see instruction
manual 308249, supplied. Install the bowl and
support, without the screen, to flush. Clean the
screen separately.
3. Close the pressure drain valve.
4. Put the suction tube in a grounded pail of solvent.
5. Remove the spray tip from the gun.
Flushing
firmly to the side of a grounded metal pail when
flushing.
6. Follow Startup on page 9. Keep the gun trig-
gered until clean solvent comes from the nozzle.
Release the trigger and lock the gun trigger safety.
Operation with the pump not primed can lead to
premature packing wear and damage to the pump.
7. Check all fluid connections for leaks. Relieve the
pressure before tightening any connections. Start
the sprayer. Recheck the connections for leaks.
8. Remove the suction tube from the solvent pail.
Unlock the gun trigger safety. Trigger the gun to
force solvent from the hose. Do not let the pump
run dry for more than 30 seconds, to avoid damag-
ing the pump packings. Relieve the pressure.
9. Unscrew the filter bowl and reinstall the clean
screen. Reinstall the bowl, hand tight only.
10. Follow Storage or Changing Colors, on page 12
Relieve the pressure.
WARNING
FIRE AND EXPLOSION HAZARD
To reduce static sparking and splashing,
always remove the spray tip from the
gun, and hold a metal part of the gun
CAUTION
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