Graco Hydra-Clean 312585P, Instructions - Parts Manual

Page: 9 / 30

Operation
312585P 9
Operation
Pressure Relief Procedure
1. Engage the trigger lock.
2. Close the bleed-type master air valve to shutoff the
pump.
3. Disengage the trigger lock.
4. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
5. Engage the trigger lock.
6. Open all fluid drain valves in the system, having a
waste container ready to catch drainage. Leave the
drain valve(s) open until you are ready to spray
again.
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved after follow-
ing the steps above, VERY SLOWLY loosen the tip
guard retaining nut or hose end coupling to relieve
pressure gradually, then loosen completely. Clear
the hose or tip obstruction.
Cleaning Solutions
Prepare the cleaning solution according to the manufac-
turer’s instructions. Be sure to observe all warnings. If
you are using powdered cleaners, mix them thoroughly
in a separate pail before adding them to a supply drum.
Undissolved powders are extremely abrasive and may
damage pump parts.
Flushing
Hold a metal part of the gun/valve firmly to the side of a
grounded metal pail and use the lowest possible fluid
pressure during flushing.
Trapped air can cause the pump to cycle unexpect-
edly, which could result in serious injury from splashing
or moving parts.
Wear appropriate protective clothing, such as water-
proof outerwear and eye goggles, according to the
cleaner manufacturer’s recommendations. Cleaning
chemicals may be toxic, and cause serious irritation to
your eyes or skin.
To reduce the risk of fluid injection injury, static spark-
ing, or splashing, relieve the pressure, and remove the
spray tip (spray guns only) before flushing.