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Troubleshooting
28 312001G
Pump cycles but does not build up
pressure.
Pump is not primed. Prime pump.
Inlet screen is clogged . Clean debris off inlet screen and
make sure suction tube is
immersed in fluid.
Suction tube is not immersed in
paint.
Make sure suction tube is
immersed in paint.
Suction tube is leaking. Tighten suction tube connection.
Inspect for cracks or vacuum
leaks. If cracked or damaged,
replace suction tube.
Prime/Spray Valve is worn or
obstructed with debris.
Take sprayer to Graco/M
AGNUM
authorized service center.
Pump check ball is stuck. Read Pump does not prime sec-
tion in Troubleshooting, page 27.
Pump cycles, but paint only drib-
bles or spurts when spray gun is
triggered.
Pressure is set too low. Slowly turn Pressure Control
Knob clockwise to increase pres-
sure setting which will turn motor
on to build pressure.
Spray tip is clogged. Unclog spray tip, page 13.
InstaClean fluid filter is clogged. Clean or replace InstaClean fluid
filter, page 21.
Spray gun fluid filter is clogged. Clean or replace gun fluid filter,
page 21.
Spray tip is too large or worn. Replace tip.
Problem Cause Solution