Graco EM 5000 Instructions-Parts List Manual page 9

WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 6.
3. Adjust the Spray Pattern
a. Turn the pressure adjusting knob (B) just until
spray from the gun is completely atomized. See
Fig. 3. To avoid excessive over–spray and fogg-
ing, and to decrease tip wear and extend the life
of the sprayer, always use the lowest possible
pressure needed to get the desired results.
b. If more paint coverage is needed, use a larger tip
rather than increasing the pressure.
c. Test the spray pattern. To adjust the direction of
the spray pattern, engage the gun safety latch
(E). See Fig. 3. Loosen the tip guard retaining
nut (A). Position the tip guard (B) horizontally for
a horizontal pattern or vertically for a vertical pat-
tern. Tighten the retaining nut. See Fig. 5.
4. To Clean a Clogged Tip
WARNING
To reduce the risk of serious injury from injection,
use extreme caution when cleaning or changing
spray tips. If the spray tip clogs while spraying,
engage the gun safety latch immediately, and then
follow the procedure in Steps a. to e., below.
Never wipe off buildup around the spray tip until
pressure is fully relieved and the gun safety latch is
engaged.
a. Clean the front of the tip frequently during daily
operation. First, relieve the pressure. Then, use
a solvent–soaked brush to clean the tip.
b. If the spray tip does clog, release the gun trig-
ger, and engage the gun safety latch.
c. If using the RAC IV Spray Tip Kit, rotate the
RAC IV handle 180 . See Fig. 5. Disengage the
gun safety latch.Trigger the gun into a grounded
waste container. Engage the gun safety latch
again. Return the handle to the spraying position.
d. If you are using a spray tip kit which is not
self–cleaning, VERY SLOWLY loosen the tip
guard retaining nut or hose coupling to relieve
pressure gradually, and then loosen the fitting
completely. Clean the tip or hose, then reas-
semble.
e. Disengage the gun safety latch, and resume
spraying.
f. If the tip is still clogged, engage the gun safety
latch, shutoff and unplug the sprayer, and open
the pressure drain valve to relieve pressure. Re-
move the spray tip and clean it.
Operation
g. Instructions for cleaning the RAC IV spray tip
are given in manual 307–848, supplied.
KEY
A Tip Guard Retaining Nut
B RAC IV Tip Guard
C Rotate Handle 180 and
trigger gun to clear tip clog
Fig. 5
5. If the sprayer shuts itself off when you are spray-
ing at high pressure, Relieve the pressure. A
switch in the pressure control box shuts off the spray-
er if it is operated at a pressure too high for the oper-
ating conditions. Before resetting the switch, deter-
mine and correct the cause of over–pressurization.
6. Be sure the spray tip you use is properly sized for the
fluid being sprayed. Always use the lowest pressure
needed to obtain a good spray pattern. Higher pres-
sure does not improve the spray pattern, but does
cause premature tip and sprayer wear.
7. To reset the switch, be sure the fluid pressure is re-
lieved and the power supply cord is unplugged. Re-
move the pressure control cover. Press the reset but-
ton. Reinstall the pressure control cover. See Fig 6.
KEY
A Reset Button
Fig. 6
A
B
C
A