12 307-711
STARTUP
7. Release the trigger safety lever and trigger the gun
onto
a piece of paper to check the spray pattern. Ad
-
just
the pressure setting to obtain the best atomiza
-
tion and spray pattern.
Always use the lowest
pressure necessary.
Excessive pressure cause
premature
tip wear and pump wear
.
NOTE: If
you cannot obtain a good spray pattern or ade
-
quate atomization, your paint may be too thick.
Thin the paint according to the manufacturer’s
recommendations until you can get good atom-
ization.
8. Whenever
you stop spraying, even for a moment,
al
-
ways
set
the trigger safety lever to prevent acciden
-
tally
trigger the gun.
9. Whenever you stop spraying for more than a mo-
ment, or if you must leave the sprayer unattended,
shut
it of
f and follow the
Pressure Relief Procedure
on
page 1
1.
NOTE: The
sprayer will not restart
if it was left pressur
-
ized after shutting it off. Relieve pressure, then
start
it.
Fig 5
PAINT
PUMP
TORQUE TO
320–360 in–lb
(36–41 N.m)
TORQUE TO
170–200 in–lb
(19–23 N.m)
0273
10.
After
the first 3 to 5 hours of operation
torque the
four hex head screws on the bottom of the paint
pump
to 170–200 in–lb (19–23 N.m). See Fig 5.
Also torque
the inlet valve to 320–360 in–lb
(36–41
N.m).
Repeat
these torques
after another
3 to 5 hours of
operation,
and then after each 25 hours of operation
(about
weekly).
CAUTION
Failure
to properly tighten the inlet valve and screws
at
the intervals indicated will result in oil leaking from
the hydraulic system into the paint, and can cause
costly
damage to the sprayer
.
CAUTION
Never
start the
electric motor with the inlet valve re
-
moved,
as it will severely damage the diaphragm.
11.
If you have a Reverse-A-Clean IV tip guard on your
gun
and the tip clogs while spraying,
release the gun
trigger,
engage the trigger
safety lever
, and rotate the
spray
tip handle 180
. See Fig 6.
Disengage the safety lever and trigger the gun into
a
grounded metal waste container
. Hold a metal part
of
the gun firmly to the side of the container to
reduce
the risk of static sparking and splashing. The fluid
pressure should force the obstruction from the tip.
Engage
the safety lever
.
Return
the handle to the original position, disengage
the
safety lever
, and resume spraying.
Fig 6
ROTATE
SPRA
Y TIP
HANDLE 180
;
TRIGGER GUN T
O
CLEAR OBSTRUC-
TION, RETURN
HANDLE T
O SPRAY
POSITION
0278
12.
If
the tip is still clogged
, engage the trigger safety le
-
ver,
shut of
f and unplug the
sprayer
, and open the by
-
pass valve one turn counterclockwise. Disas-
semble
the tip
in the reverse order of assembly (see
manual 307–848). Thoroughly clean all parts in a
compatible
solvent and
inspect for wear or damage.
Replace parts as needed and reassemble. Be sure
to
use a new seal and gasket when changing tips.
13.
If
you have a
tip guard on your gun which is not self-
clearing,
follow step 12.
14.
Spraying techniques are given on page 15.
15. Important maintenance procedures are given on
pages
13 and 14.
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