Troubleshooting
332252A
7
Troubleshooting
Mechanical/Fluid Flow
Perform
Relieve Pressure Procedure
, page 6.
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
Pump output is low
Spray tip worn
Follow
Pressure Relief Procedure
on page 6,
then replace tip. See your separate gun or tip
manual.
Spray tip clogged
Relieve pressure. Check and clean spray tip.
Paint supply
Refill and reprime pump.
Intake strainer clogged
Remove and clean, then reinstall
Intake valve ball and piston ball are
not seating properly
Remove intake valve and clean. Check balls
and seats for nicks; replace if necessary; see
pump manual. Strain paint before using to
remove particles that could clog pump.
Fluid filter, tip filter, or tip is clogged
or dirty.
Clean filter; see operation manual.
Prime valve leaking
Relieve pressure. Repair prime valve.
Verify pump does not continue to
stroke when gun trigger is released.
(Prime valve not leaking.)
Service pump; see pump manual.
Leaking around throat packing nut
which may indicate worn or damaged
packings.
Replace packings; see pump manual. Also
check piston valve seat for hardened paint or
nicks and replace if necessary. Tighten pack-
ing nut/wet-cup.
Pump rod damage
Repair pump. See pump manual.
Pump output is low
Low stall pressure
Turn pressure knob fully clockwise. Make sure
pressure control knob is properly installed to
allow full clockwise position. If problem per-
sists, replace pressure transducer.
Piston packings are worn or dam-
aged
Replace packings; see pump manual.
O-ring in pump is worn or damaged
Replace o-ring; see pump manual.
Intake valve ball is packed with mate-
rial
Clean intake valve; see pump manual.
Pressure setting is too low
Increase pressure; see pump manual.
Large pressure drop in hose with
heavy materials
Use larger diameter hose and/or reduce overall
length of hose.
