Operation - Graco EM 490 Instructions-Parts List Manual

WARNING
To reduce the risk of serious bodily injury, including
fluid injection, splashing fluid or solvent in the eyes
or on the skin, or injury from moving parts or electric
shock, always follow the
PROCEDURE on page 2 whenever you shut off the
sprayer, when checking or servicing any part of the
spray system, when installing, cleaning or chang-
ing spray tips, and whenever you stop spraying.
Startup
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: Before starting the sprayer for the first time, flush
it. See page 9 for FLUSHING GUIDELINES.
1. Close the pressure drain valve. See Fig 6.
2. Don't install the spray tip yet!
3. Put the suction tube into the paint container.
4. Lower the pressure setting by turning the pressure
adjusting knob all the
Fig 6.
DRAIN HOSE
SUCTION TUBE
Fig 7–6

OPERATION

PRESSURE RELIEF
way counterclockwise. See
5. Disengage the gun safety latch. See Fig 7.
6. To prime the pump , hold a metal part of the gun
firmly against and aimed into a grounded metal pail.
See Fig 5. Squeeze the trigger and hold it open, turn
the ON/OFF switch to ON, and slowly increase the
pressure setting until the sprayer starts. Keep the gun
triggered until all air is forced out of the system and
the paint flows freely from the gun. Release the trig-
ger and engage the gun safety latch.
NOTE: If the pump is hard to prime, open the drain valve.
When fluid comes from the valve, close it. Disen-
gage the gun safety latch and proceed as in Step
6.
7. Check all fluid connections for leaks. If any leaks
are found, relieve pressure before tightening the
connections.
Fig 7–5
ON/OFF SWITCH
PRESSURE ADJUSTING KNOB
TURN CLOCKWISE TO
INCREASE PRESSURE
CW
PRESSURE DRAIN VALVE
MAINTAIN FIRM
METAL TO METAL
CONTACT WHEN
PRIMING OR FLUSHING
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