Troubleshooting
332689D 29
Pump does not prime. Prime/Spray Valve is in SPRAY posi-
tion.
Move Prime/Spray Valve to PRIME
position.
Inlet screen is clogged or suction
tube is not immersed in fluid.
Clean debris off inlet screen and
make sure suction tube is immersed
in fluid.
Pump was not primed with flushing
fluid.
Remove suction tube from paint.
Prime pump with water or sol-
vent-based flushing fluid, page 14.
Inlet valve check ball is stuck. Remove suction tube and place a
pencil into the inlet section to dis-
lodge the ball, press pump priming
button, or Power Flush sprayer, page
22.
ProX9: AutoPrime may need
replacement. Turn power switch ON
and listen for “tap” in pump. If you do
not hear “tap”, AutoPrime is dam-
aged. Take sprayer to Graco/M
AG-
NUM authorized service center.
Inlet valve check ball or seat is dirty Remove inlet fitting. Clean or replace
ball and seat.
Outlet valve check ball is stuck. ProX9: Insert screw driver in slot and
remove Easy-Access™ door, page
11. Unscrew outlet valve with a 3/4
in. socket. Remove and clean
assembly.
X5 and X7: Remove outlet fitting and
clean outlet check ball.
Suction tube is leaking. Tighten suction tube connection.
Inspect for cracks or vacuum leaks.
Pump does not prime with fluid. Remove suction tube from paint.
Prime pump with water or sol-
vent-based flushing fluid.
Fluids are viscous or sticky. Some fluids may prime faster if the
Power Switch is momentarily turned
off so the pump can slow and stop.
Repeat several times if necessary.
Problem Cause Solution
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