7309251
Troubleshooting
PROBLEM
WHAT TO CHECK
If check is OK, go to next check
WHAT TO DO
When check is not OK refer to this column
Low or fluctuating output 1. For worn spray tip. 1. Follow Pressure Relief Procedure Warn-
ing, then replace tip. See your separate
gun or tip manual.
2. Verify pump does not continue to stroke when
gun trigger is released.
2. Service pump. See page 23.
3. Filter clogged. 3. Relieve pressure. Check and clean filter.
4. Prime valve leaking. 4. Relieve pressure. Repair prime valve.
5. Suction hose connections. 5. Tighten any loose connections.
6. Electrical supply with volt meter.
Meter must read:
210–255 Vac for 220–240 Vac models.
85–130 Vac for 100–120 Vac models. Low volt-
ages reduce sprayer performance.
6. Reset building circuit breaker; replace
building fuse. Repair electrical outlet or try
another outlet.
7. Extension cord size and length; must be at least
12 gauge wire and no longer than 300 ft. Longer
cord lengths reduce sprayer performance.
7. Replace with a correct, grounded exten-
sion cord.
8. Low stall pressure. 8. Do either or both:
c. Turn pressure control knob fully
clockwise. Make sure pressure
control knob is properly installed
to allow full clockwise position.
d. Try a new transducer.
9. Motor armature for shorts by using an armature
tester (growler) or perform spin test. See page
9.
9. Replace motor. See page 22.
10. Paint supply. 10.Refill and reprime pump.
11. Intake strainer clogged. 11.Remove and clean, then reinstall.
12. Suction tube or fittings loose. 12.Tighten; use thread sealant or sealing tape
on threads if necessary.
13. To see if intake valve ball and piston ball are
seating properly. See page 23.
13.Remove intake valve and clean. Check
balls and seats for nicks; replace if neces-
sary, page 23. Strain paint before using to
remove particles that could clog pump.
14. Leaking around throat packing nut which may
indicate worn or damaged packings. See page
23.
14.Replace packings, page 23. Also check
piston valve seat for hardened paint or
nicks and replace if necessary. Tighten
packing nut/wet-cup.
15. Pump rod damage 15.Repair pump, page 23.
Motor runs but pump does not
stroke
1. Displacement pump pin (114) (damaged or
missing), page 23.
1. Replace pump pin if missing. Be sure re-
tainer spring (27) is fully in groove all
around connecting rod, page 23.
2. Connecting rod assembly (9) for damage, page
21.
2. Replace connecting rod assembly,
page 21.
3. Gears or drive housing, page 21. 3. Inspect drive housing assembly and gears
for damage and replace if necessary,
page 21.
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