Graco 232751 Operation page 39

Problem
Pump cycles but pressure does
not build up.
Cannot pull gun trigger.
Gun stops spraying.
Pump cycles but paint only
dribbles or spurts when trigger is
pulled.
Pressure set at maximum, but
cannot achieve good spray
pattern.
Cause
Pump not primed.
Inlet screen clogged.
Suction tube not immersed.
Paint pail empty.
Suction tube has vacuum air leak. Tighten suction tube connection. Inspect for cracks or
Pump check valves are dirty or
damaged.
Prime/Spray valve worn or
obstructed with debris.
Pump check ball stuck.
Gun trigger safety engaged.
Spray tip clogged.
Pressure is set too low.
Spray tip clogged.
Spray tip too large or worn.
Gun filter clogged.
InstaClean fluid filter is clogged.
Pump check ball stuck.
Tip is too large for sprayer.
Tip is worn beyond capability of
sprayer.
Gun filter clogged.
Inlet screen clogged.
Pump valves worn.
InstaClean fluid filter clogged.
Extension cord too long or not
heavy enough gauge.
Solution
Prime pump, page 15.
Clean debris off inlet screen
Reposition suction tube in bottom of paint pail.
Refill paint pail and reprime sprayer.
vacuum leaks. If cracked or damaged, replace.
Return sprayer to Graco/M
center.
See "Pump will not prime" section of Troubleshooting
table, page 38.
Remove gun trigger safety
1 Turn arrow-shaped handle to unclog position.
2 Aim gun into waste pail.
3 Squeeze trigger.
4 Return arrow-shaped handle to spray position
and begin spraying.
Turn pressure control knob right to increase pressure.
Clean tip. See "Gun stops spraying" section of
Troubleshooting table, page 38.
Replace tip.
Clean or replace gun filter, page 52.
Clean or replace InstaClean fluid filter, page 51.
See "Pump will not prime" section of Troubleshooting
table, page 38.
Select smaller tip, Tip Hole Size, page 32.
Replace tip.
Clean or replace gun filter, page 52.
Clean debris off inlet screen.
Check for worn pump valves:
1 Prime sprayer with paint.
2 Trigger gun momentarily. When trigger is
released, pump should cycle and stop.
3 If pump continues to cycle, pump valves may be
worn.
4 Return sprayer to Graco/M
service center.
Clean or replace InstaClean fluid filter, page 51.
Replace cord, Grounding and Electrical Requirements,
page 10.
Troubleshooting
authorized service
AGNUM
authorized
AGNUM
39