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Graco President K Series - Pressure Relief Procedure

Graco President K Series
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Installation
Pressure Relief Procedure
WARNING
INJECTION
HAZARD
Fluid under high pressure can be in
-
jected through the skin and cause
serious injury
. T
o 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
Install or clean the spray tips
1.
Engage the spray gun/dispensing valve safety
latch.
2.
Shut of
f the air to the motor
.
3.
Close the bleed-type master air valve (required in
your system).
4.
Disengage the gun/valve safety latch.
5.
Hold a metal part of the gun/valve firmly to the side
of a grounded metal pail, and trigger the gun/valve
to relieve pressure.
6.
Engage the gun/valve safety latch.
7.
Open the pump drain valve (required in your
system), having a container ready to catch the
drainage.
8.
Leave the drain valve open until you are ready to
spray/dispense again.
If you suspect that the spray tip/nozzle or hose is
completely clogged, or that pressure has not been fully
relieved after following the steps above,
very slowly
loosen the tip guard retaining nut or hose end coupling
and relieve pressure gradually
, then loosen completely
,
then clear the tip/nozzle or hose.
A bleed-type master air valve is required in your
system to reduce the risk of serious bodily injury
from moving parts if you are adjusting or repairing
the air motor
.
The bleed-type master air valve relieves air trapped
between this valve and the motor after the air
regulator is shut of
f. T
rapped air can cause the
motor and pump to cycle unexpectedly
. Install the
valve between the pump air inlet and the air
regulator within easy reach of the pump.
WARNING
Moving parts can pinch or amputate your fingers or
other body parts. When the pump is operating, the
priming piston (located at the pump intake) and the
air motor piston (located behind the air motor
plates) move.
Never
Operate the pump with the air
motor plates removed, and keep your fingers and
hands away from the priming piston. See
Moving
Parts Hazard
on page 3.
WARNING

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