Graco ULTRA AIRLESS 230-963 User Manual
Page 13
TYPE OF
PROBLEM
LOW OUTPUT
NO OUTPUT
Motor runs and pump stroke:
WHAT TO CHECK
If
check is
OK.
go t o next check
1. Check for worn spray tip.
2. Check
to see
that
pump does not con-
tinue
to
stroke when gun trigger is
released. Plug in and turn on sprayer.
Prime with paint. Trigger gun momen-
tarily, then release and engage safety
latch. Relieve pressure, turn
off and
unplug sprayer.
3. Check electrical supply with volt meter.
Meter should read
Volts.
4. Check extension cord size and length;
must be at least 12 gauge wire and no
longer than 15.2 m
5. Check
and
leads from bridge
or loose wires or connectors. Refer
to
to
circuit board
for damage
6.
Check stall pressure. Refer
to Calibration
Procedure on page 24.
7.
Check bridge
+
and
-
leads and
terminals
to motor. Inspect
wiring
in-
sulation and terminals for signs of
overheating. See page
8. Check for loose motor brush leads and
terminals. See page
27.
9. Check for worn motor brushes which
should be 14 mm
minimum. See
for broken and misaligned motor
brush springs. Rolled portion of spring
must rest squarely on top of brush.
motor brushes for binding
in
brush holders. See page 27.
circuit board
by substituting
with a good circuit board. See page
22.
motor armature for
by us-
ing an armature tester (growler) or per-
form spin
test.
bridge
by substituting with
a good bridge or by performing the
bridge test. See page 16 or
20.
CAUTION:
Do
not perform this check
A bad armature
will immediately burn
until armature is determined
to be good.
out
a good bridge.
1.
Check paint supply.
2. Check for clogged intake strainer.
3. Check for loose suction tube or fittings.
WHAT
TO
DO
If
check
is
NOT
OK refer to this column
1. Follow Pressure Relief Procedure
Warning then replace
tip.
See your
separate gun or tip manual.
2. Service pump. See manual
3. Reset building circuit breaker; replace
building fuse. Repair electrical outlet or
try
another outlet.
4. Replace with a correct, grounded exten-
sion cord.
5. Clean circuit board male terminals.
minals. Securely reconnect lead
Replace loose or defective lead ter-
minals to board.
6. Calibrate pressure control. See page 24.
7. Be sure male terminal
are
centered and firmly connected to female
terminals. Replace any loose terminal or
damaged wiring. Securely reconnect
wires to bridge.
8.
Tighten terminal screws. Replace
brushes if leads are damaged. See page
27.
9. Replace brushes. See page
spring if broken. Realign spring
with brush. See page
27.
11 .Clean brush holders, remove carbon
dust with small cleaning brush. Align
brush lead with
slot in brush holder to
free vertical brush movement.
circuit board. See page
motor.
See page
bridge. See page
1. Refill and
pump.
2.
Remove and clean, then reinstall.
3. Tighten; use thread sealant or sealing
tape on threads if