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4.
Cleaning a Clogged Tip
WARNING
To avoid
a
fluid injection injury,
DO
NOT hold
your hand, body, or
a
rag in front of the spray tip
when cleaning or checking
a
clogged tip. Always
point the gun toward
.the ground or into
a
waste
container when checking to see if the
tup
I
S
clear.
DO
NOT try to
"
blow back
"
paint; this is NOT an
air spray sprayer.
a. Clean the front of the tip frequently during the
day's operation.
First,
follow the Pressure
Relief Procedure Warning on page
6.
Then
use
a
solvent-soaked brush to keep fluid from
building up and clogging the tip.
b. If the spray tip does clog, release the gun trig-
ger, engage the gun safety, and rotate the
RAC
IV
handle
180°.
See Fig
5.
c. Disengage the gun safety and trigger the gun
into
a
waste container. Engage the gun safety
again.
d., Return the handle to the original position,
disengage the gun safety, and resume spray-
ing.
e.
if
the tip is stili dogged,
engage the gun safety,
shutoff and unplug the sprayer, and open the
drain valve to relieve pressure. Clean the spray
tip as shown in manual
307
-
848,
supplied with
the RAC
IV
DripLess tip guard.
SHUTDOWN
AND
CARE
1.
Check the packing nutlwet-cup daily. First
follow the Pressure Relief Procedure Warning
on page
6.
Be sure the wet
-
cup is
113
full of TSL
at
all
times to help prevent fluid buildup on the piston
rod and premature wear of packings. The packing
nut should be tight enough to stop leakage, but no
tighter. Overtightening may cause binding and
ex
-
cessive packing wear.
Use
a
screwdriver and light
hammer to adjust the nut. See Fig
6.
2.
Clean the fluid filter often and whenever the
sprayer is stored. First follow the Pressure Relief
Procedure Warning on page
6.
Refer to manual
307
-
273,
supplied, for the cleaning procedure.
3.
Lubricate the bearing housing after every
100
hours of operation. Fill the cavity
of
the bearing
housing with SAE
10
nondetergent oil.
4.
Flush the sprayer at the end
of
each work day
and fill
it
with mineral spirits to help prevent pump
corrosion and freezing.
See
"
Flushing Guidelines
"
on page
0.
chance of fluid freezing in the pump or pressure
type of paint in the sprayer when it is not in use.
control in cold weather, never leave water or any
result in loss of pressure or stalling.
Freezing can seriously damage the sprayer and
TRIGGER SAFETY
ENGAGETHE
LATCH
BY
TURNING
LATCH
PERPENDICUI
TO
QUN
BODY
AR
Fig
5
Fig
6
6.
Coil the hose and hang
it
on the hose rack when
storing
it,
even for overnight, to help protect the
hose from kinking, abrasion, coupling damage,
etc.
rWARNiNG1
Refer to the warning section
HOSE
SAFETY on
page
3
for information on the hazard of using
damaged hoses.
5.
For vary short shutoff periods, leave the suction
tube in the paint, follow the Pressure Relief Pro-
cedure Warning on page
6,
and clean the spray
tip.
307-671
7