Graco Magnum TrueAirless ProX19 Owner's Manual page 39

Problem
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.)
3A9019A EN
Cause
Prime/Spray Valve is in SPRAY
position.
Inlet screen is clogged or Suction
Tube is not completely immersed in
paint.
Inlet or outlet valve ball is stuck or
dirty.
Suction Tube is leaking.
Debris in paint causing obstruction.
Prime/Spray Valve is worn or
obstructed with debris.
Troubleshooting
Solution
Turn Prime/Spray Valve down to
PRIME position until paint exits Drain
Tube.
Clean debris off inlet screen and
make sure Suction Tube is
completely immersed in paint.
Press PushPrime button twice to
loosen inlet valve and reprime
sprayer. See Fill Pump (Prime
Pump), page 17.
See Storage/Priming Tool, page 34.
Then reprime pump.
Remove inlet and/or outlet valves and
clean, replace and reprime. See Fill
Pump (Prime Pump), page 17.
•
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 35.
•
Make certain the outlet ball
moves free in the housing
before replacing.
Inspect Suction Tube connection for
cracks or vacuum leaks.
Strain the paint. See Strain the
Paint, page 17.
Take sprayer to Graco/MAGNUM
authorized service center.
39