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5307892
Cleaning and Maintenance
Pressure Relief Procedure
WARNING
SKIN INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
under high pressure can be injected 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:
D are instructed to relieve the pressure,
D stop spraying,
D check or service any of the system equipment,
D or install or clean the spray tip.
1. Lock the gun trigger safety and other equipment
safety locks.
2. Turn off the power to the pump.
3. Unlock the gun trigger safety.
4. Hold a metal part of the gun firmly to the side of a
grounded metal pail, and trigger the gun to relieve
pressure.
5. Lock the gun trigger safety.
6. Open the drain valve (required in your system),
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 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.
Cleaning
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure at left.
Flush the back pressure valve whenever the rest of the
system is flushed. Before flushing, relieve pressure,
then open the valve by turning the adjusting screw
counterclockwise to open the valve.
Before removing the back pressure valve for thorough
cleaning and inspection, relieve pressure. Then
remove the valve and clean and inspect all parts.
CAUTION
Do not allow paint or solvent to set in the system for
any extended length of time. Fluid could dry on the
valve stem, causing leakage at the stem packing. If
leakage occurs, disassemble and clean the valve.
CAUTION
Handle the hard carbide parts, valve stem tip (2) and
seat (10), carefully to avoid damaging them. Damage
will cause poor operation and leakage.