Operation And Maintenance - Graco 244920 Instructions-Parts List Manual

Operation and Maintenance

Pressure Relief Procedure
WARNING
INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or dispensing 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 dispensing
D Check or service any of the system equipment
D Install or clean a spray tip or nozzle
1. Shut off the fluid supply to the Metering Valve.
2. Actuate the Metering Valve and the dispensing
device until the fluid stops flowing from them.
NOTE: Follow the manual purge procedure in the
PrecisionFlo XL system manual to actuate the
metering valve and dispensing device.
3. Relieve the system pressure as instructed in the
separate instruction manuals.
Operating the Metering Valve
The Metering Valve is operated through the
PrecisionFlo XL Control. Follow the PrecisionFlo XL
Control instructions to operate the Metering Valve.
WARNING
MOVING PARTS HAZARD
Moving parts, such as the fluid needle,
can pinch fingers. Do not operate the
equipment with the guard (51) removed.
Maintenance
Visually check the following items periodically:
D Check the fluid needle and seat area for leakage
and wear.
D Check the fluid needle shaft for leakage and wear.
D Make sure the fluid connections are tight and are
not leaking.
D Check the cables for damage and make sure they
are securely connected.
Clean the Fluid Needle and Seat Assembly
If the fluid flow from the dispensing device appears to
be restricted, disassemble the fluid needle and seat as
instructed on page 7 and clean the parts. Use a
non-flammable cleaning fluid that is recommended by
your material supplier.
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