Graco Magnum L10 Repair Manual page 17

Problem
Pump cycles but does not build up
pressure.
Pump cycles, but paint only dribbles
or spurts when spray gun is trig-
gered.
332642C
Cause
Pump is not primed.
Inlet screen is clogged.
Suction tube is not immersed in
paint.
Suction tube is leaking.
Prime/Spray Valve is worn or
obstructed with debris.
Pump check ball is stuck.
Pressure is set too low.
Spray tip is clogged.
InstaClean™ fluid filter is clogged.
Spray gun fluid filter is clogged.
Spray tip is too large or worn.
Basic Troubleshooting
Solution
Prime pump.
Clean debris off inlet screen and
make sure suction tube is immersed
in fluid.
Make sure suction tube is immersed
in paint.
Tighten suction tube connection.
Inspect for cracks or vacuum leaks. If
cracked or damaged, replace suction
tube.
Take sprayer to Graco/M
authorized service center.
Read Pump does not prime section
in Basic Troubleshooting, page 15.
Slowly turn Pressure Control Knob
clockwise to increase pressure set-
ting which will turn motor on to build
pressure.
Unclog spray tip, see Operation
manual.
Clean or replace InstaClean™ fluid
filter, see Operation manual.
Clean or replace gun fluid filter, see
Operation manual.
Replace tip.
AGNUM
17