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307-735
10
OPERATION
Fig 2
ON/OFF
SWITCH
PRESSURE CONTROL KNOB
RAC
IV DripLess
TIP GUARD and
SwitchTip
TURN CCW T
O
LOWER PRESURE
PRESSURE DRAIN V
ALVE
1. Prime
the sprayer with paint.
a.
Close the pressure drain valve.
b.
Don’t install the spray tip yet!
c.
Put the suction tube into the paint container
.
d. Turn the pressure adjusting knob all the way
counterclockwise
to lower the pressure
e.
Disengage the gun safety latch.
f.
Hold a metal part of the gun firmly against and
aimed into a grounded metal waste container.
See
Fig 3.
Squeeze the trigger and hold it open,
turn the sprayer ON, and slowly increase the
pressure
setting until the sprayer
starts. Keep the
gun
triggered until all air is forced out of the sys
-
tem and the paint flows freely from the gun. Re-
lease
the trigger and engage the gun safety
latch.
NOTE: If
the pump is hard to prime, place a container un
-
der
the pressure drain valve and open the valve.
When fluid comes from the valve, close it. Then
disengage
the gun safety
latch and proceed as in
Step
1f, above.
g. Check
all fluid connections for
leaks; relieve pres
-
sure
before tightening connections.
2. Install the spray tip and tip guard
a.
Be sure the gun safety latch is engaged.
b. Install the spray tip. If using the RAC IV, refer to
manual 307–848, supplied with the gun, for in-
stallation
instructions.
3. Adjusting the spray pattern
(Refer to Fig 4. )
a.
Increase
the pressure setting just until spray from
the
gun is completely atomized. To avoid
exces
-
sive overspray and fogging, 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 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
and loosen the retaining nut. Position the tip
guard
horizontally for a horizontal pattern or verti
-
cally
for a vertical
pattern. Then tighten the retain
-
ing
nut.
Fig 3
MAINTAIN
FIRM
METAL-TO-METAL
CONT
ACT BETWEEN
GUN AND GROUNDED
MET
AL CONT
AINER
GROUND
WIRE
Fig
4
SPOTTY
PATTERN
–
INCREASE
PRESSURE
GOOD
FULL
PATTERN