Graco Roof Rigs 224483 Instructions-Parts List Manual page 11

6. To start the pump:
a. Place a container under the pressure drain valve
and open the valve.
b. Reduce the engine speed by moving the metal
throttle lever away from the fuel tank about half
way to the left.
c. Turn the pressure control knob to minimum.
d. Turn ON the pressure control switch.
e. Turn the pressure control knob 1/4 turn from
minimum pressure. Run the pump until fluid
flows smoothly from the pressure drain valve.
f. Close the pressure drain valve.
WARNING
Hold the handle of the wand firmly when triggering
the gun to reduce the risk of it kicking back from
the surge of pressure, which could cause serious
injury.
g. Disengage the gun safety latch. Hold a metal
part of the gun firmly against a grounded metal
container. Holding the gun firmly with both
hands, squeeze the trigger until fluid flows from
the gun.
h. Release the trigger. Engage the safety latch.
7. If you have not primed the unit with the coating
yet, move the siphon tube to the coating container.
Release the trigger safety latch. Trigger the gun into
the water/solvent pail just until coating appears. Tip
the gun forward and fully release the trigger to en-
gage the trigger safety latch.
TRIGGER LOCK
shown in
engaged or
"safe" position
TRIGGER LOCK
shown in
disengaged or
"off–safe" position
PRESSURE
CONTROL KNOB
PRESSURE CONTROL
ON/OFF SWITCH
Fig. 4
Start Up
0398
WARNING
To reduce the risk of serious injury from fluid injec-
tion, never operate the spray gun with the tip guard
removed.
8. Install the tip guard and spray tip. See page 13.
CAUTION
Use the lowest fluid pressure and the lowest throttle
setting needed. Higher settings cause excessive
clutch cycling and premature tip and pump wear.
9. Adjust the engine speed and pump pressure be-
fore transporting the hoses to the roof. Trigger
the gun onto a test paper to check the spray pattern
and atomization. Turn the pressure adjusting knob
until you get a good pattern. Then slowly lower the
throttle setting as far as you can without changing the
spray pattern (the clutch does not cycle).
10. Read SPRAY TECHNIQUES on page 14.
CAUTION
Close the black fuel shutoff lever whenever you are
transporting the sprayer to prevent fuel from flooding
the engine.
Keep the sprayer upright and level when operating it
and when transporting it. This prevents crankcase oil
from leaking into the combustion chamber, which
makes start up very difficult.
PRESSURE DRAIN VALVE
0016
THROTTLE
CHOKE shown in
choked position
FUEL SHUTOFF
LEVER
shown in off position
0394A