WHAT
TO
CHECK
If
check is
OK.
go
to
next check
1.
Check for worn spray tip.
2.
to stroke
when
gun trigger is released. Plug
Check to
see
that
pump does not continue
in and turn on sprayer. Prime with material.
engage
safely
latch. Relieve pressure, turn
Trigger gun momentarily, then release
and
off
and unplug sprayer.
3.
Check electrical supply with volt meter.
Meter should read 105
to
125 VAC.
4.
Check extension cord size and length; must
be et
least
12 gauge wire
and
no
longer thal
150
ft
(15.2.
m).
i.
Check
G1
and
62
leads
from bridge
(p81
to
circuit board
(3071
for damage or
loose
wire!
or connectors. Refer
to
page
22.
Procedure on page 24.
3.
Check
stall
pressure. Refer to Calibration
7.
Check bridge
(3081.
+
and
-
leads and ter-
and terminals for signs of overheating.
See
minals
to
motor. Inspect wiring insulation
page
18.
I.
Check for loose motor brush leads and ter-
minals.
See
page
25.
I.
Check for worn motor brushes which should
be 9/16 minimum length on longest side.
See
page
25.
0.Check for broken and misaligned motor
brush springs. Rolled portion of spring must
resf
squarely on top of brush.
1.Check motor brushes for binding
i:.
orush
holders. See page
25.
2.Check circuit board
(307)
by substituting
with
a
good circuit board.
See
page
22.
3.Check
motor
armature for shorts by.using an
armature tester (growler) or perform spin
test.
See
page
18.
3
4.Check bridge
(308)
by substituting with
a
test.
See
page
18.
good bridge or by performing the bridge
CAUTION:
Do
not perform
this
check until
armature
is
determined
to
be good.
A
bad
armature will immediately bum
out
a
gcd
bridge.
Check material supply.
Check for clogged intake strainer.
See
page
26.
Check for loose suction tube or fittings.
Sea
Page
26.
WHAT
ro
DO
When check
Is
not
OK
refer
to
this
colul
1.
Follow Pressure Relief Procedure then
replace tip.
See
your separate gun or tip
manual.
2.
Service pump. See page
26.
3.
Reset building circuit breaker; replace
building fuse. Repair electrical outlet
01
another outlet.
1.
Replace with
a
correct, grounded extension
cord.
i.
Clean circuit
board
mete terminals. Replace
lease
or defective lead terminals. Securely
reconnect
lead
terminals to board.
i.
Calibrate pressure control.
See
page
24.
'.
Be sure male terminal blades are centered
and firmly connected to female terminals.
ing. Securely reconnect wires to bridge.
Replace any loose terminal or damaged wir-
i.
Tighten terminal screws. Replace brushes
if
.
Replace brushes. See page
25.
leads are damaged. See page
25.
0.Replace spring if broken. Realign spring witt
brush.
See
page
25.
1.Clean brush holders. remove carbon
dust
with
slot
in brush holder to assure
free
ver-
with small cleaning brush. Align brush lead
tical
brush movement.
Z.Repiace circuit board.
See
page
22.
Meplace motor.
See
page
31.
1.Repiace bridge.
See
page 21.
Refill
and reprime pump.
Remove and clean, then reinstall.
Tighten;
use
thread sealant or sealing tape
on threads
if
necessary.
(Continuedl [Continued)
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