Low Output; No Output - Graco ULTRA AIRLESS 230-963 Instructions And Parts List

~~
TYPE OF PROBLEM

LOW OUTPUT

NO OUTPUT

Motor runs and pump stroke:
307-671
WHAT TO CHECK
If check is OK. go t o next check
1. Check for worn spray tip.
2. Check t o see that pump does not con-
tinue stroke when gun trigger is
to
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 190-250 Volts.
4. Check extension cord size and length;
must be at least 12 gauge wire and no
ft).
longer than 15.2 m (150
5. Check G1 and G2 leads from bridge
1 3 4 0 )
circuit board
W X ) to
or loose wires or connectors. Refer to
22.
page
6. Check stall pressure. Refer to Calibration
Procedure on page 24.
+
(308)
7.
Check bridge and
terminals to motor. Inspect wiring in-
sulation and terminals for signs of
20.
overheating. See page
8. Check for loose motor brush leads and 2 7 .
terminals. See page
9. Check for worn motor brushes which
should be 14 mm ( 9 / 1 6 ) minimum. See
27.
pBge
10.Check for broken and misaligned motor
brush springs. Rolled portion of spring
must rest squarely on top of brush.
11.Check motor brushes for binding in
brush holders. See page 27.
1 3 4 0 )
12.Check circuit board by substituting
with a good circuit board. See page
13.Check motor armature for shorn by us-
ing an armature tester (growler) or per-
See
form spin page 15.
test.
14.Check bridge by substituting with
( 3 0 8 )
a good bridge or by performing the
bridge test. See page 16 or
CAUTION: Do not perform this check
until armature is determined to be good.
will
A bad armature immediately burn
out a good bridge.
1. Check paint supply.
2. Check for clogged intake strainer.
3. Check for loose suction tube or fittings.
WHAT TO
check is NOT OK refer t o this column
If
1. Follow Pressure Relief Procedure
Warning then replace tip. See your
separate gun or tip manual.
2. Service pump. See manual 307-793.
3. Reset building circuit breaker; replace
building fuse. Repair electrical outlet or
another outlet.
try
4. Replace with a correct, grounded exten-
sion cord.
5. Clean circuit board male terminals.
for damage
Replace loose or defective lead ter-
minals. Securely reconnect lead ter-
minals to board.
6. Calibrate pressure control. See page 24.
-
leads and 7. Be sure male terminal blades 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
2 7 .
9. Replace brushes. See page
10.Replace spring if broken. Realign spring
with brush. See page
11 .Clean brush holders, remove carbon
dust with small cleaning brush. Align
brush lead with slot in brush holder to
assure free vertical brush movement.
12.Replace circuit board. See page
2 2 .
13.Replace motor. See page
14.Repiace bridge. See page
20.
1. Refill and reprime pump.
2.
Remove and clean, then reinstall.
3. Tighten; use thread sealant or sealing
tape on threads if necessary.
DO
27.
2 7 .
2 2 .
29.
20.