Graco ProMix II Series, Service Parts, Page: 8 / 40

Pressure Relief Procedure
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8 310653D
Pressure Relief
Procedure
I
1.
Engage the trigger lock.
2.
Press Standby key on Operator Station.
3.
Shut off air at the spray gun.
4.
Relieve fluid and air pressure at component A and
B and solvent feed pumps or pressure pots as
instructed in their separate manuals. Close all fluid
supply shutoff valves.
5.
Press Mix on Operator Station.
6.
Disengage trigger lock.
7.
Hold a metal part of the gun
firmly to a grounded metal
pail. Trigger the gun to relieve
pressure.
8.
Engage trigger lock.
9.
Press Standby on Operator Station.
10.
If you suspect that the spray tip or hose is clogged
or that pressure has not been fully relieved after
following the steps above, very slowly loosen tip
guard retaining nut or hose end coupling to relieve
pressure gradually, then loosen completely. Clear
hose or tip obstruction.
WARNING
Follow Pressure Relief Procedure when you stop
spraying, before changing spray tips, and before
cleaning, checking, or servicing equipment. Read
warnings, page 6.
WARNING
If using an electrostatic gun, shut off electrostatics
before flushing.
Shut
off
WARNING
Pressure upstream of component A and B dispense
valves (A, B) may not be fully relieved.
11.
Before servicing or disconnecting flow meters, color
change valves, or other components between the
fluid supply shut off valves (T) and dispense valves
A and B, very slowly loosen swivel fitting (HH) to
relieve pressure gradually.
T
T
HH
HH
A
B