Operation - Graco ULTRA 500 231-032 Instructions-Parts List Manual

Use this procedure each time you start the sprayer to
help ensure the sprayer is ready to operate and that you
start it safely.
WARNING
To reduce the risk of serious injury, follow the illus-
trated Pressure Relief Procedure warning on
page 4 whenever you are instructed to relieve pres-
sure.
NOTE: Flush the sprayer if this is a first-time startup.
See page 15.
NOTE: See Fig 12–2 except where noted.
1. Plug in the sprayer.
2. Close the pressure drain valve.
3. Put the suction tube into the paint container.
4. Turn the pressure adjusting knob fully counter-
clockwise to minimum pressure.
CAUTION
Do not run the pump without fluid in it for more than
30 seconds to avoid damage to the displacement
pump packings.
WARNING
To reduce the risk of static sparking and splashing
when flushing, always remove the spray tip from the
gun and hold a metal part of the gun firmly to the side
of a grounded metal pail.
6. Prime the pump.
a. Open the pressure drain valve. Turn on the
sprayer. Slowly turn the pressure adjusting knob
clockwise until the sprayer starts. When fluid
comes from the drain hose, close the valve.
b. Disengage the gun safety latch. See Fig 12–1.
Following the warning, above, trigger the gun
until all air is forced out of the system and the
paint flows freely from the gun.
c. Release the trigger. Engage the gun safety latch.
7. Check all fluid connections for leaks. Relieve the
fluid pressure before tightening connections.
8. Install the spray tip and tip guard. Engage the gun
safety latch. See Fig 12–1. Install the spray tip
according to the instructions supplied with it.
307–758
12

OPERATION

9. Adjust the spray pattern
a. Increase the pressure just until spray from the
gun is completely atomized. Use the lowest
pressure needed to get the desired results. This
reduces over spray and fogging, decreases tip
wear and extends the life of the sprayer.
b. If more coverage is needed, use a larger tip
rather than increasing the pressure.
c. Test the spray pattern. To adjust the pattern,
engage the gun safety latch, loosen the retaining
nut. Position the tip guard horizontally for a hori-
zontal pattern or vertically for a vertical pattern.
Then tighten the retaining nut.
ADJUSTING KNOB
DRAIN HOSE
GUN SAFETY
LATCH SHOWN
ENGAGED
GUN SAFETY LATCH
SHOWN DISENGAGED
ON/OFF SWITCH
PRESSURE
OUTLET NIPPLE
PRESSURE
DRAIN VALVE