Pressure Relief Procedure - Graco RS Operation And Repair Manual

Pressure Relief Procedure

Pressure Relief
Procedure
1. Shutdown proportioner.
2. Relieve proportioner pressure. See proportioner
manual.
3. Engage gun trigger lock.
4. Close the bleed-type master air valve.
5. Disengage the trigger lock.
6. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
7. Engage the trigger lock.
8. With a waste container in place, open all fluid drain
valves in the system. Leave drain valve(s) open until
you are ready to spray again.
9. 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 retain-
ing ring (D) or loosen hose end coupling to relieve
pressure gradually, then loosen completely. Clear
hose or tip obstruction. See F
part references.
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