Graco A Series Manual page 25

Problem
Pump does not prime.
Pump cycles but does not build up
pressure.
3A1782D
Cause
Prime/Spray Valve is in SPRAY posi-
tion.
Inlet screen is clogged or suction
tube is not immersed in fluid.
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.
Pump does not prime with fluid.
Fluids are viscous or sticky.
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.
Troubleshooting
Solution
Move Prime/Spray Valve to PRIME
position.
Clean debris off inlet screen and
make sure suction tube is immersed
in fluid.
Remove suction tube from paint.
Prime pump with water or sol-
vent-based flushing fluid, page 12.
Remove suction tube and place a
pencil into the inlet section to dis-
lodge the ball, or press pump priming
button.
Remove inlet fitting. Clean or replace
ball and seat.
Remove outlet fitting and clean outlet
check ball.
Tighten suction tube connection.
Inspect for cracks or vacuum leaks.
Remove suction tube from paint.
Prime pump with water or sol-
vent-based flushing fluid.
Some fluids may prime faster if the
Power Switch is momentarily turned
off so the pump can slow and stop.
Repeat several times if necessary.
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 Troubleshooting, page 25
AGNUM
25