Graco ULTRA 1000 Instructions-Parts List Manual page 16

YPE OF PROBLEM
.OW OUTPUT
IO OUTPUT
lotor runs and pump stroke
.
WHAT TO CHECK
If check is
OK, no
to next check
1. Check for worn spray tip.
2. Check to see that pump does not continue
m
stroke when gun trigger is released. Plug
in and turn on sprayer. Prime 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 106 to 125 VAC.
4. Check extension cord size and length; must
be at least 12 auge wire and no longer thar
150
h
(15.2 my.
5. Check G1 and G2 leads from bridge
( 3 0 8 1 to
circuit board
123)
for damage or loose wires
or connectors. Refer to page 25.
6.
Check stall pressure. Refer
to
Calibration
Procedure on page 27.
7.
Check bridge (308)
+
end
-
leads and ter-
minals to motor. Inspect wiring insulation
and terminals for signs of overheating. See
page 24.
8. Check for loose motor brush leads and ter-
minals. See page
22.
9. Check for worn motor brushes which should
be 1/2" minimum.
See
page
22.
10.Check for broken end misaligned motor
brush springs. Rolled portion of spring must
rest
squarely on top of brush.
holden. See page
22.
11.Check motor brushes for binding in brush
12.Check circuit board (23) by substituting with
a good circuit board. Seepage
2 5 .
13.Check motor armature for shorts by using ar
armature tester (growler) or perform spin
test.
See
page
19.
14.Check bridge (308) by substituting with a
good bridge or by performing the bridge
test. See page
x )
or 24.
armature is determined to be good. A bad
CAUTION:
Do
not perform this check until
armature will immediately burn out a good
bridoe.
-
1. Check paint supply.
2. Check for clogged intake strainer. See Page
29.
3. Check for loose suction tube or fiiings. See
page
29.
WHAT TO DO
When check Is not OK
refer t o this colurnr
1. F o l l o w Pressure Relief Procedure Warn-
or tip manual.
ing then replace tip. See your separate gun
2. Service pump. See manual 307-793.
3.
Reset building circuit breaker; replace
another outlet.
building fuse. Repair electrical outlet or try
1. Replace with a correct, grounded extension
cord.
5.
Clean circuit board male terminals. Replace
loose 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.
ing, Securely reconnect wires to bridge.
Replace any loose terminal or damaged wir-
3. Tighten terminal screws. Replace brushes if
leads are damaged. See page
22.
3. Replace brushes. See page
2 2 .
10.Replace spring
if
broken. Realign spring with
brush. See page
22.
I1.Clean 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.Replace circuit board. See page
2 5 .
13.Replace motor. See page 30.
i4.Replace bridge.
See
page 24.
i. Refill and reprime pump.
2. Remove and clean, then reinstall.
3. Tighten; use thread Sealant or sealing tape
on threads if necessary.
Troubleshooting continued on next page.
16
307-785
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