Graco Hydra-Clean 206–515 Instructions-Parts List Manual page 6

Pressure Relief Procedure
WARNING
INJECTION HAZARD
Fluid under high pressure can be in-
jected through the skin and cause
serious injury. To reduce the risk of an
injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you:
are instructed to relieve the pressure,
stop spraying,
check or service any of the system equipment,
or install or clean the spray nozzles.
1. Lock the Hydra-Clean gun trigger safety.
2. Close the pump air regulator.
Operation
3. Close the red handled bleed-type master air valve
(required in your system)
4. Unlock the gun trigger safety and trigger the gun to
relieve pressure.
5. Lock the gun trigger safety.
6. Open the pump drain valve, having a container
ready to catch the drainage.
7. Leave the drain valve open until you are ready to
spray again.
If you suspect that the dispensing valve, extension, or
grease fitting coupler is clogged, or that pressure has
not been fully relieved after following the steps above,
VERY SLOWLY loosen the coupler or hose end cou-
pling and relieve pressure gradually, then loosen
completely, now clear the clog.