17
Refill the supply container.
Check for loose connections on the
siphon assembly, tighten, then re-
prime pump.
Tighten just enough to stop leakage.
Replace the packings. See page 24.
Replace piston rod.
Increase the pressure . See page 4.
Service the pump. See pages 22,23,24,25
Increase the pressure. See page 4.
Remove the tip and/or filter and clean them.
Replace Tip.
Clean the filter.
Use a larger diameter hose.
Service the lower check valve ball
check. See page 23.
Service the upper check ball valve per
page 23.
Replace the packings. See page 24.
Use smaller tip.
Use less extension cord.
Reset overload switch.
Service upper and lower check ball valve.
See page 23.
Inspect suction hose for holes, if so equipped.
Ensure suction nut is tight and lower ball
cage O-ring is not worn.
There is spitting from the gun.
Paint leaks into the wet cup.
The motor operates, but the
paint pump doesn't
The motor and displacement
pump operates, but paint pres-
sure is too low, or none.
The displacement pump oper-
ates, but the output is too low
on the downstroke or both
strokes.
The displacement pump oper-
ates, but the output is too low
on the upstroke.
The displacement pump oper-
ates but the pressure is too low.
Motor stops.
The displacement pump
operates, but unit does not
prime.
The fluid supply is low or empty.
Air entrapped in the fluid pump
of hose.
The wet cup is loose.
The throat packings are worn or
damaged.
Piston Rod Worn.
The pressure setting is too low.
The displacement is seized by dried
paint.
The pressure setting is too low.
The tip or gun filter is clogged.
Tip is worn.
The fluid displacement pump filter
(if used) is clogged.
There is a large pressure drop in
the fluid hose.
The lower check valve ball check is not
seating properly.
The upper check valve ball is not
seating properly.
The lower packings are worn or
damaged.
Tip too large.
Long Extension cord causes power drop.
Upper or lower ball is stuck or obstructed.
Unit hose air leak (bubbles blowing out
bypass hose)
PROBLEM
CAUSE
SOLUTION
TROUBLESHOOTING
