Graco Magnum X5 Repair And Parts Manual page 14

Basic Troubleshooting
Problem
Pump does not prime.
14
Cause
Prime/Spray Valve is in SPRAY posi-
tion.
Inlet screen is clogged or suction
tube is not immersed.
Pump was not primed with flushing
fluid.
Inlet valve check ball is stuck.
Inlet valve check ball or seat is dirty
Outlet valve check ball is stuck.
Suction tube is leaking allowing air to
enter.
Pump valves are worn.
Paint is very thick or sticky.
Solution
Turn Prime/Spray Valve to PRIME
position (pointing down).
Clean debris off inlet screen and
make sure suction tube is immersed
in fluid.
Remove suction tube from paint.
Prime pump with water or
solvent-based flushing fluid, see
Operation manual 312001.
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
service center.
Remove inlet fitting. Clean or replace
ball and seat.
ProX7 and ProX9: Insert screw
driver in slot and remove
Easy-Access door, page 8. Unscrew
outlet valve with a 3/4 in. socket.
Remove and clean assembly.
X5 and X7: Remove outlet fitting and
clean outlet check ball.
Check suction tube for cracks and
cuts. Make sure suction tube clamp is
on hose. Replace suction tube if
cracked or damaged.
Check for worn valves, see page 14.
Thin material per manufacturer's
instructions.
Momentarily turn power switch OFF
to allow pump to slow and stop.
Repeat as necessary.
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