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Basic Troubleshooting
12 312667B
Pump does not prime. Prime/Spray Valve is in SPRAY posi-
tion.
Turn Prime/Spray Valve to PRIME
position (pointing down).
Inlet screen is clogged or suction
tube is not immersed.
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
solvent-based flushing fluid, see
Operation manual 312001.
Inlet valve check ball is stuck. Remove suction tube and place a
pencil into the inlet section to dis-
lodge the ball, allowing pump to
prime properly. Or, Power Flush
sprayer, see Operation manual
312001.
AutoPrime may need replacement.
Turn power switch ON and listen for
“tap” in pump. If you do not hear
“tap”, AutoPrime is damaged. Take
sprayer to Graco/M
AGNUM autho-
rized 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. ProX7 and ProX9: Insert screw
driver in slot and remove
Easy-Access door, page 7. 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. Check suction tube for cracks and
cuts. Make sure suction tube clamp is
on hose. Replace suction tube if
cracked or damaged.
Problem Cause Solution