General Repair Information; Pressure Relief Procedure - Graco 311365G Repair Manual

Pressure Relief Procedure

SKIN INJECTION HAZARD
System pressure must be manually relieved to
prevent system from starting or spraying
accidentally. Fluid under high pressure can be
injected through skin and cause serious injury.
To reduce risk of injury from injection, splashing
fluid, or moving parts, follow Pressure Relief
Procedure whenever you:
• are instructed to relieve pressure
• stop spraying
• check or service any system equipment
• install or clean spray tip
1. Turn pressure control knob to zero.
2. Turn ON/OFF switch to OFF.
3. Unplug power supply cord.
4. Hold metal part of gun firmly to grounded
metal pail. Trigger gun to relieve pressure.
5. Lock gun safety latch.
6. Open prime valve. Leave prime valve open
until ready to spray again.
If suspected that spray tip or hose is
completely clogged, or that pressure has
not been fully relieved after following steps
above, VERY SLOWLY loosen tip guard
retaining nut or hose end coupling to
relieve pressure gradually, then loosen
completely. Then clear tip or hose
obstruction.
311365G

General Repair Information

CAUTION
To reduce risk of pressure control malfunction:
• Use needle-nose pliers to disconnect wire.
Never pull on wire, pull on connector.
• Mate wire connectors properly. Center flat
blade of insulated male connector in
female connector.
• Route wires carefully to avoid interference
with other connections of pressure control.
Do not pinch wires between cover and
control box.
1. Keep all screws, nuts, washers, gaskets,
and electrical fittings removed during repair
procedures. These parts are not normally
provided with replacement assemblies.
ELECTRIC SHOCK HAZARD
MOVING PARTS HAZARD
HOT SURFACE HAZARD
To reduce risk of serious injury, including
electric shock, do not touch moving or electrical
parts with fingers or tools while testing repair.
Shut off and unplug sprayer when inspection is
complete. Install all covers, guards, gaskets,
screws, washers and shroud before operating
sprayer.
2. Test repair after problem is corrected.
3. If sprayer does not operate properly, review
repair procedure to verify procedure was
done correctly. If necessary, see
Troubleshooting, page 11, for other
possible solutions.
General Repair Information
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