Graco ULTRA 1000 Instructions-Parts List Manual page 16

OW OUTPUT
NO OUTPUT
Motor runs and pump stroke:
1. Check for worn spray tip,
2. Check to sea that pump does not continue
to 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 105 to 125 VAC.
4. Check extension cord size and length: must
be at least 12 gauge wire and no longer thar
150
ft
(15.2 ml.
5. Check G1 and 02 leads from bridge
( 3 0 8 )
to
or connectors. Refer to page
25.
clrcuit board (23) for damage or loose wres
Procedure on page
27.
6.
Check stall pressure. Refer to Calibration
7. Check bridge (308)
+
and
-
leads and ter-
minals to motor. Inspect wiring insulation
and terminals for signs of overheating. See
page 24.
minals. See page
22.
8.
Check for loose motor brush leads and ter-
9. Check for worn motor brushes which should
be
112"
minimum. See page
2 2 .
10.Check for broken and misaligned motor
brush springs. Rolled portion of spring must
rest squarely on top of brush.
holders. See page
22.
11.Check motor brushes for dinding in brush
12,Check circuit board ( 2 3 ) by substituting with
a good circuit board. See page
2 5 .
13.Check'motor armature for shons by using ar
armature tester (growler) or perform spln
t e s t .
See page 19.
14.Check bridge (308) by substituting
with a
good brldge or by performing the bridge
test.
See page 20 or 24.
CAUTION:
Do
not perform this check until
armature is determined to be good. A bad
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 fittings. Sea
page
2 9 .
1. Follow Pressure Relief Procedure Wnrn-
lng 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
try
another outlet.
4. 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
2 7 .
7.
Be sura male terminal blades are centered
and firmly connected to female terminals.
Replace any loose terminal or damaged wir-
ing. Securely reconnect wires to bridge.
8. Tighten terminal screws. Replace brushes if
leads are damaged. See page
22.
9. Replace brushes. See page
2 2 .
10.Replace spring
if
broken. Realign spring with
brush. See page
2 2 .
11 .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
25.
13.Replace motor. See page
3 0 .
14.Replace bridge. See page 24.
I. Refill and reprime pump.
2. Remove and clean, then reinstall.
I.
Tighten; use thread sealant or sealing tape
on threads if necessary.
Troubleshooting continued on next page.