Graco 231-032 A Series Instructions And Parts List page 16

YPE OF PROBLEM
DW OUTPUT
0 OUTPUT
lotor run8 and pump stroke!
WHAT TO CHECK
I f check is OK, go to next check
I. Check for worn spray tip.
2. Check to sae that pump does not continue
to stroke when gun trigger is released. Plug
in and turn on sprayer. Prima with paint.
Trigger gun momentarily, then release and
engage safety latch. Relieve pressure, turn
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 at least 12 gauge wire and no longer thar
1Wft (15.2
m).
5. Check G1 and G2 leads from bridge (308) to
circuit board (23) for damage or l w a e wires
or connectors. Refer to page
25.
Procedure on page 27.
5.
Check staii pressure. Refer to Calibration
7. Check bridge (308)
+
and
-
iaads and
ter-
minals to motor. InsDect wiring insulation
and terminals for signs of overheating. See
page
,20.
3. Check for loose motor brush leads and tar-
mimls. See page
22.
8. Check for worn motor brushes which should
be 1 /2" minimum. See page
22.
I0.Check for broken and misaligned motor
brush springs. Rolled portion of spring must
rest
squarely on top of brush.
I1 .Check motor brushes for binding in brush
holders. Sea page
2 2 .
12.Check circuit board (23) by substituting with
a good circuit board. See page
2 5.
13.Check motor armature for shorts by using
81
armature tester (growler) or perform spin
test.
See page 20.
14.Check bridge
1 3 0 8 )
by substituting with
a
g w d bridge or by performing the bridge
test. See page 19.
CAUTION:
Do not perform this check until
armature is determined
to
be good. A bad
armature will immediately burn out a good
bridge.
1. Check paint supply.
2. Check for clogged intake strainer. See page
2 9 .
3. Check for l o o s e suction tube or fittings. See
page
29.
WHAT TO DO
When check Is not OK refer to this colum
1. Follow Pressure Relief Procedure Warn-
ing then replace tip. See your separate gun
or tip manual.
2. Selvice pump.
See
manual
307-793.
3. Reset
building circuit breaker; replace
building fuse. Repair electrical outlet or try
another outlet.
4. Replace with a correct, grounded extension
cord.
5. Clean circuit board male terminals. Replace
loosa or defective lead terminals. Securely
reconnect lead terminals to board.
6. Calibrate pressure control. See page
27.
7. Be sure male terminal blades are centered
and firmly connected to female terminals.
Replace any l o o s e terminal or damaged wir-
ing. Securely reconnect wires to bridge.
8. lighten terminal screws. Replace brushes if
9. Replace brushes. See page
2 2 .
leads are damaged. See page
2 2 .
10.Raplace spring if broken. Realign spring
wit1
brush. See page
Y2.
1l.Claan brush holders, remove carbon dust
with small cleaning brush. Align brush lead
with
slot
in brush holder to assure free ver-
tical brush movement.
12.Replaca circuit board. See page
2 5 .
13.Raplace motor. See page 30.
14.Replace bridge. See page 24.
1. Refill and reprime pump.
2. Remove and clean, then reinstall.
3. Tighten:
use
thread sealant or sealing tape
on threads if necessary.
Tmubleshooting continued on nextpage