Graco Magnum True Airless Project Painter Plus Owner's Manual page 34

Troubleshooting
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.)
34
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.
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.
X5/X7 Only: Press PushPrime button
twice to loosen inlet valve and reprime
sprayer. See Fill Pump (Prime
Pump), page 16.
See Storage/Priming Tool, page 31.
Then reprime pump.
Remove inlet and/or outlet valves and
clean and clean, replace and reprime.
See Fill Pump (Prime Pump), page
16. See figures below:
•
Make certain to not lose the
ball and spring of the inlet
valve assembly or the
sprayer will not function.
•
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 16.
Take sprayer to Graco/MAGNUM
authorized service center.
3A5431B EN