Graco 24F561, Repair Manual

Page: 11 / 40

Troubleshooting
3A1181B 11
Low Output
1. Worn spray tip.
Relieve pressure, page 7 . Replace
tip. Refer to gun instruction manual,
312363.
2. Verify pump does not continue to
stroke when gun trigger is
released.
Service pump. See Displacement
Pump Replacement, page 13 .
3. Prime valve leaking.
Relieve pressure, page 7 . Then
repair prime valve. See Drain Valve
Replacement, page 24 .
4. Suction tube connections.
Tighten any loose connections.
Check o-ring on suction tube.
5. Electric supply with volt meter.
Meter must read 100-130 Vac;
210-260 Vac. Low voltages
reduce sprayer performance.
Reset building circuit breaker;
replace building fuse. Repair electri-
cal outlet or try another outlet.
6. Extension cord size and length.
Replace with a correct, grounded
extension cord. See
Grounding
and Electric Requirements, page
6
.
7. Leads from motor to circuit board
for damaged or loose wire con-
nectors. Inspect wiring insulation
and terminals for signs of over-
heating.
Be sure male terminal pins are cen-
tered and firmly connected to
female terminals. Replace any
loose terminals or damaged wiring.
Securely reconnect terminals.
8. Worn motor brushes which must
be greater than 1/4 in. (6 mm).
Replace brushes. See Motor
Brush Replacement, page 18 .
9. Motor brushes binding in brush
holders.
Clean brush holders. Remove car-
bon dust by using compressed air to
blow out brush dust.
10. Low stall pressure. Turn pressure
control knob fully clockwise.
Replace pressure control assem-
bly. See
Pressure Control Assem-
bly Replacement, page 22 .
11. Motor armature for shorts by
using an armature tester
(growler) or perform
Spin Test ,
page 16 .
Replace motor. See Motor
Replacement, page 27 .
Problem Cause Solution