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Troubleshooting
309225W 23
Pump does not prime. Spray-Prime/Drain Valve (J) is in
SPRAY position.
Turn Spray-Prime/Drain Valve to
PRIME/DRAIN position (pointing
down).
Inlet screen (L) is clogged or suction
tube (G) is not immersed.
Clean debris off inlet screen and
make sure suction tube is at bottom
of paint pail.
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, page 17.
Pump does not prime. Outlet valve check ball is stuck. dx Sprayer: Remove hose from
sprayer. Unscrew outlet valve to
remove assembly with a screwdriver.
Screw the valve back on the pump.
XR Sprayers: Use a screw driver to
open the Easy-Access
™
door.
Unscrew outlet valve with a 3/4 in.
wrench. Remove and clean assem-
bly.
Suction tube is leaking. Tighten suction tube connection (K).
Inspect for cracks or vacuum leaks.
Spray-Prime/Drain Valve is plugged. Clean/replace drain tube as neces-
sary. Take sprayer to Graco/mag-
num authorized service center if
valve is plugged.
Spray gun stopped spraying. Spray tip is clogged. Unclog spray tip, page 12.
Pump cycles but does not build up
pressure.
Pump is not primed. Prime pump.
Pump cycles but does not build up
pressure.
Inlet screen (L) is clogged or suction
tube (G) is not immersed.
Clean debris off inlet screen and
make sure suction tube is at bottom
of paint pail.
Paint pail is empty. Refill paint pail. Reprime sprayer.
Pump cycles but does not build up
pressure.
Suction tube is leaking. Tighten suction tube connection (K).
Inspect for cracks or vacuum leaks. If
cracked or damaged, replace suction
tube.
Pump check valves are dirty or dam-
aged. (Usually only one valve).
Clean or replace check valves. Read
Pump Check Valves, page 11.
Spray-Prime/Drain Valve (J) is worn
or obstructed with debris.
Take sprayer to Graco/magnum
authorized service center.
Pump check ball is stuck. Read Pump does not prime section
in Troubleshooting, page 23
Problem Cause Solution