Operating Guide

Troubleshooting
3A6419B EN 37
Sprayer runs, but pump does not
prime or looses prime while in use.
(Pump cycles but does not pull paint
into Suction Tube or build pressure.)
Prime/Spray Valve is in SPRAY
position.
Turn Prime/Spray Valve down to
PRIME position until paint exits Drain
Tube.
Inlet screen is clogged or Suction
Tube is not completely immersed in
paint.
Clean debris off inlet screen and
make sure Suction Tube is completely
immersed in paint.
Inlet or outlet valve ball is stuck or
dirty.
Press PushPrime button twice to
loosen inlet valve and reprime
sprayer. See Fill Pump (Prime
Pump), page 16.
See Storage/Priming Tool, page 32.
Then reprime pump.
Remove inlet and/or outlet valves and
clean, replace and reprime. See Fill
Pump (Prime Pump), page 16.
• Make certain to not lose the
ball and spring of the inlet
valve assembly or the
sprayer will not function.
See Inlet Valve Removal,
page 33
.
• Make certain the outlet ball
moves free in the housing
before replacing.
Suction Tube is leaking. Inspect Suction Tube connection for
cracks or vacuum leaks.
Debris in paint causing obstruction. Strain the paint. See Strain the
Paint, page 16.
Prime/Spray Valve is worn or
obstructed with debris.
Take sprayer to Graco/MAGNUM
authorized service center.
Problem Cause Solution