Hitachi 231580 - Manual (Page 9)

308715 9
Startup
WARNING
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.
Pressure Relief Procedure
1. Engage the gun safety latch.
2. Turn the ON/OFF switch to OFF.
3. Unplug the power supply cord.
4. Disengage the gun safety latch. Hold a metal part
of the gun firmly to a grounded metal pail. Trigger
the gun to relieve pressure.
5. Engage the gun safety latch.
6. Open the pressure drain valve. Leave the pressure
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 loos-
en the tip guard retaining nut or hose end coupling to
relieve pressure gradually, then loosen completely.
Now clear the tip or hose obstruction.
Startup Procedure
Use this procedure each time you start the sprayer to
help ensure the sprayer is ready to operate and that
you start it safely.
NOTE: If this is a first-time startup, flush the sprayer.
See page 12.
NOTE: Refer to Fig. 2 and the other figures referenced
in the text as you start the sprayer.
1. Open the pressure drain valve (42). See Fig. 8.
2. Don’t install the spray tip until the pump is
primed!
3. Put the suction tube (32) into the paint. If you
are pumping from a pail, push the drain hose (33)
down below the top of the pail to avoid splashing
paint when the drain is opened.
Open or drain, position
Fig. 8
1
1 42
04648
4. Turn the pressure knob (64) to the minimum
setting.
5. Disengage the gun trigger safety. See Fig. 4,
page 7.
CAUTION
Do not run the sprayer dry for more than 30 seconds
to avoid damaging the pump packings.
6. To prime the pump, turn the sprayer switch (52)
on. Slowly increase the pressure until the sprayer
starts. When fluid comes from the pressure drain
valve, close the valve.