Low Output - Graco 232140 Instructions-Parts List Manual

LOW OUTPUT

TYPE OF PROBLEM
Low Output
Troubleshooting
WHAT TO CHECK
If check is OK, go to next check
1. Check for worn spray tip.
2. Check to see 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 un-
plug sprayer.
3. Check electrical supply with volt meter. Meter
must read 105–125 VAC.
4. Check extension cord size and length; must
be at least 12 gauge wire and no longer than
300 ft.
5. Check leads from motor to pressure control
circuit board (104) for damaged or loose wires
or connectors. Inspect wiring insulation and
terminals for signs of overheating.
6. Check for loose motor brush leads and termi-
nals. See page 18.
7. Check for worn motor brushes which must be
1/2 in. minimum. See page 18.
8. Check for broken and misaligned motor brush
springs. Rolled portion of spring must rest
squarely on top of brush.
9. Check motor brushes for binding in brush
holders. See page 18.
10.Check stall pressure.
11. Check motor armature for shorts by using an
armature tester (growler) or perform spin test.
See page 17.
12.Check motor control board (104) by perform-
ing motor control board diagnostics on page
21. If diagnostics indicate, substitute with a
good board.
CAUTION: Do not perform this check until
motor armature is determined to be good. A
bad motor armature can burn out a good
board.
WHAT TO DO
When check is not OK refer to this column
1. Follow Pressure Relief Procedure Warn-
ing, then replace tip. See your separate
gun or tip manual.
2. Service pump. See page 29.
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. Be sure male terminal blades are centered
and firmly connected to female terminals.
Replace any loose terminal or damaged
wiring. Securely reconnect terminals.
6. Tighten terminal screws. Replace brushes
if leads are damaged. See page 18.
7. Replace brushes. See page 18.
8. Replace spring if broken. Realign spring
with brush. See page 18.
9. Clean brush holders, remove carbon dust
with small cleaning brush. Align brush lead
with slot in brush holder to assure free verti-
cal brush movement.
10.Replace with new pressure control board
(104). See page 21.
12.Replace motor. See page 27.
11. Replace with new pressure control board
(104). See page 21.
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