Graco Viscount II 4500 Pump [8/16] Operation
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Graco Viscount II 4500 Pump [8/16] Operation

Graco Viscount II 4500 Pump [8/16] Operation
8 307-159
Operation
Pressure Relief Procedure
WARNING
INJECTION
HAZARD
Fluid under high pressure can be in
-
jected through the skin and cause seri
-
ous injury
. T
o reduce the risk of an injury
from injection, splashing fluid, or moving parts, fol
-
low the
Pressure Relief Procedure
whenever you:
are instructed to relieve the pressure,
stop spraying/dispensing,
check or service any of the system equipment,
or install or clean the spray tips/nozzles.
1.
Lock the spray gun or dispensing valve trigger
safety latch and any other equipment safety
latches.
2.
Shut of
f the power supply to the hydraulic motor
.
3.
Unlock the gun/valve trigger safety
, and trigger the
gun into a grounded metal waste container
, holding
a metal part of the gun firmly to the side of the
container until pressure is relieved.
4.
Lock the trigger safety
.
5.
Open all system drain valves, having a container
ready to catch the drainage.
If you suspect that the spray tip 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
. Now clear
the tip or hose.
Hydraulic Fluid
Check
the hydraulic fluid level, and add fluid as neces
-
sary to the fill lines before each use.
Wet-Cup
If the pump is not immersed, fill the displacement
pump wet-cup (P) 1/3 full of Graco Throat Seal Liquid
(TSL) or compatible solvent to prevent fluid from drying
on the displacement rod and damaging the pump
packings. See Fig. 2.
Flushing
Flush the pump before using it for the first time to
remove the light oil which was left in after factory
testing to protect the pump from corrosion. Be sure the
solvent used is compatible with the fluid to be sprayed
and the pump wetted parts shown (see manual
307–728). Flush until clean solvent comes from the
gun, or in a circulating system, flush long enough to
clean the entire system.
WARNING
Be sure the entire system and flushing pails are
properly grounded before flushing. Always use the
lowest possible fluid pressure, and maintain firm
metal to metal contact between the gun and pail to
reduce the risk of static sparking and splashing.
See page 5.

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