Pressure Relief Procedure - Graco 190ES 309063F Repair Manual

Pressure Relief Procedure

WARNING
SKIN INJECTION HAZARD
Follow this Pressure Relief Procedure
whenever you are instructed to relieve
pressure, stop spraying, check or ser-
vice equipment, or install or clean spray tip. read
Injection Hazard Warning.
1. Turn OFF power and turn pressure control to low-
est pressure setting.
2. Hold gun against side of grounded metal flushing
pail. Trigger gun to relieve pressure.
ti7401a
Fig. 1
3. Turn prime valve down
6
309063
FLUSH
Fig. 2
If suspected that spray tip or hose is clogged or that
pressure has not been fully relieved after following
steps above , VERY SLOWLY loosen tip guard retain-
ing nut or hose end coupling to relieve pressure gradu-
ally, then loosen completely. Clear tip or hose obstruc-
tion.
4. Engage trigger safety lock on gun if unit is being
shut down or left unattended.
CAUTION
To reduce risk of pressure control malfunction:
Use needle nose pliers to disconnect wire. Never
D
pull on wire, pull on connector.
Mate wire connectors properly. Center flat blade of
D
insulated male connector in female connector.
Route wires carefully to avoid interference with
D
other connections of pressure control. Do not pinch
wires between cover and control box.