8
309711
Troubleshooting
LOW OR FLUCTUATING OUTPUT
TYPE OF PROBLEM
WHAT TO CHECK
If check is OK, go to next check
WHAT TO DO
When check is not OK refer to this column
Motor runs and pump strokes
1. Paint supply.
1. Refill and reprime pump.
2. Intake strainer clogged.
2. Remove and clean, then reinstall.
3. Suction tube or fittings loose.
3. Tighten; use thread sealant or sealing tape
on threads if necessary.
4. To see if intake valve ball and piston ball are
seating properly. See page 19.
4. Remove intake valve and clean. Check
balls and seats for nicks; replace if neces-
sary, page 19. Strain paint before using to
remove particles that could clog pump.
5. Leaking around throat packing nut which may
indicate worn or damaged packings. See
page 19.
5. Replace packings, page 19. Also check
piston valve seat for hardened paint or
nicks and replace if necessary. Tighten
packing nut/wet-cup.
6. Pump rod damage.
6. Repair pump, page 19.
7. Capacitor failure. Visually inspect capacitor
near terminals. Ensure that orange safety re-
lief plug is intact.
7. Replace capacitor.
Motor runs but pump does not
stroke
1. Displacement pump pin (9a) (damaged or
missing), page 19.
1. Replace pump pin if missing. Be sure re-
tainer spring (9b) is fully in groove all
around connecting rod, page 19.
2. Connecting rod assembly (9) for damage,
page 17.
2. Replace connecting rod assembly,
page 17.
3. Gears or drive housing, page 17.
3. Inspect drive housing assembly and gears
for damage and replace if necessary,
page 17.
