Table of Contents
Advertisement
Type of Problem
Motor runs and pump strokes
Motor runs but pump does not stroke Displacement pump pin damaged or
Motor is hot and runs intermittently
332257A
What to Check
(if check is OK, go to next)
Low paint supply.
Intake strainer clogged.
Suction tube or fittings loose.
See if intake valve ball and piston ball
are seating properly. See pump
manual.
Leaking around throat packing nut
which may indicate worn or damaged
packings. See pump manual.
Pump rod damage.
missing.
Connecting rod assembly damaged.
Gears or drive housing, page 17.
Determine if sprayer was operated at
high pressure with small tips, which
causes low motor RPM and
excessive heat buildup.
Be sure ambient temperature where
sprayer is located is not more than
90°F (32.22°C) and sprayer is not
located in direct sun.
Troubleshooting
What to Do
(When check is not OK, refer to this
column)
Refill and reprime pump.
Remove and clean, then reinstall.
Tighten; use thread sealant or
sealing tape on threads if necessary.
Remove intake valve and clean.
Check balls and seats for nicks,
replace if necessary. Strain paint
before using to remove particles that
could clog pump. See pump manual.
Replace packings. Also check piston
valve seat for hardened paint or nicks
and replace if necessary. Tighten
packing nut/wet-cup. See pump
manual.
Replace pump, page 15.
Replace pump pin if missing. Be sure
retainer spring is fully in groove all
around connecting rod, page 15.
Replace connecting rod assembly.
See pump manual.
Inspect drive housing assembly and
gears for damage and replace if
necessary, page 17.
Decrease pressure setting or
increase tip size.
Move sprayer to shaded, cooler area
if possible.
13
Advertisement
Table of Contents
