16
PROBLEM
CAUSE
SOLUTION
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
pressure is too low or none.
The displacement pump
operates but the output
is too low.
The fluid supply is low or empty.
Air entrapped in the fluid pump or
hose.
The wet cup is loose.
The throat packings are worn or
damaged.
Piston Rod is Worn.
The pressure setting is too low.
The pump 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 is clogged.
There is a large pressure drop
in the fluid hose.
The lower or upper check valve
is not seating.
The packings are worn or
damaged.
The Prime/PR Valve is bypassing.
Refill the supply container.
Check for loose connections on the
siphon assembly, tighten, then reprime
pump.
Tighten just enough to stop leakage.
Replace the packings. See page 24 & 25
Replace Piston. See page 23
Increase the pressure.
Service the pump. See page 23, 24, 25
Increase the pressure.
Remove the tip and/or filter and
clean them.
Replace Tip.
Clean the filter.
Use a larger diameter hose.
Service the lower & upper check
valves. See pages 23.
Replace the packings.
See page 24, 25.
Replace the Prime/PR Valve.
TROUBLESHOOTING
