TROUBLESHOOTING
GUIDE
WARNING
Pressure
Relief
Procedure
'5.
Hold
a
metal
part
of
the
gun
firmly
to
the
side
of
a
To
reduce
the risk
of
serious bodily injury,
including
fluid
iniection.
iniuw
from
solashina
fluid
or
solvent
in
grounded
metal
pail,
and
trigger
the
gun
to
relieve
oressure.
the
eyes
or
on
th'e ikin,
moving
park
or
electric
shock,
6,
ingage
the
gun
safety
latch.
alwaysfollowthisprocedurewhenever
you
shut
off
the
sprayer,
when
checking
or
sewicing
any
part
of
the
7.
Open
the
Pressure
drain
valve, having
a
Container
sDrav
svstem.
when
installing,
cleanina
or
changing ready
to
catch the drainage.
sprajl
tips,
and
whenever
yoistop
spraying.
"
8.
Leave
the
pressure
drain
valve
open
until
you
are
ready to spray
again.
1.
Engage
the
gun
safety latch.
lf
you
suspect
that
the
spray
tip
or
hose
is
complete/y
clogged,
orthatpressure
has
notbeen
fullyrelievedaf
-
2.
Turn the
ON/OFF
switch to
OFF.
ter
following
the steps
above,
wrap
a
rag around the
tip
auard retainina nut
or
hose
end
coudina
and
VERY
3.
Unplug
the
power supply
cord.
SLOWLY
loo&&
the
part
to
relieve pressure
gradu
-
ally,
then
loosen
completely.
Now
clear the tip
or
hose
4.
Disengage the
gun
safety
latch. obstruction.
:heck everything
in
the
guide
before
disassembling
the
sprayer.
TYPE
OF
PROBLEM
Basic Fluid Pressure
Problems
Basic Mechanical Problems
-
E
%ask Electrical Problems
WHAT
TO
CHECK
If
check
is
OK,
go
to
the next check.
1.
Check the pressure control knob setting.
The motor
will
not run
if
it
is at the mini
-
mum setting (fully counterclockwise).
2.Checkforacloggedspraytip.Refertoyour
separate gun or tip instruction manual.
1. Check for frozen or hardened paint in the
pump (39)
andlor pressure control bour-
don tube. Using a screwdriver, carefully
try to rotate fan at back of motor by hand.
See page 19.
~ ~~
2.
Check displacement pump connecting
rod pin
(20).
It must be completelypushed
into connecting rod
(3)
and retaining
spring (35) should be firmly in groove
01
connecting rod. See page
31.
3. Check for.motor damaae. Remove drive
to rotate fan by hand.
housing
assembly~(2). 3ee page
32.
Try
1.
Check electrical supply with volt meter.
Meter should read 190
-
250 Volts.
2.
Check extension cord for visible damage.
Use a volt meter or test lamp at extension
cord outlet to check.
3. Check sprayer power supply cord
(3ql)
for visible damage such as broken insula
-
tion or wires.
4.
Check motor brush leads. terminals and
brush length. Brush length should be
14
mm minimum. See page 33.
WHAT
TO
DO
If
check
is
not
OK,
refer
to
this column.
1.
Slowly increase the pressure setting to
see
if
the motor starts.
2.
Relieve pressure, refer to your separate
gun or tip instruction
manual.for tip clean
-
ing.
1.
Thaw. Plug in sprayer and turn
on.
Slowly in
-
crease pressure setting to see
if
motor
starts.
If
it
doesn't, replace the displace
-
ment pump packings (see manual
307
-
793) andlor replace the bare pressure
control box (301). See page 27.
2.
Push pin into place and secure with the re
-
taining spring.
3. Replace motor
(1)
if
fan won't turn.
1. Reset building circuit breaker: replace
building fuse. Try another electrical outlet.
2.
Replace extension cord.
3.
Replace power supply cord. See page
22.
4.
Tighten terminal screws; replace brushes.
See page 33.
Thaw the sprayer
if
water or water
-
based paint has frozen
in
it,
due to exposure to low temperatures, by placing it in
a
warm area.
Do
not try
to
start the sprayer until it has thawed completely.
If
the bourdon tube was not damaged by
the
freezing,the pump should
operate.
If
paint hardened (dried) in the sprayer, the pump packings andlor bare pressure control must bereplaced. See page
27
or
manual
307-793.
When replacing the bare pressure control box (item 301), remove the
OWOFF
switch, bridge, circuit board and electrical hardware
and reinstall these parts in the bare box.
307-670 13
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