AIRLESSCO AllPro Mustang 2400, Operation Manual

Page: 27 / 34

Troubleshooting
3A0994E 27
Pump does not prime. Prime/Spray Valve is in SPRAY
position. Turn Prime/Spray Valve to PRIME
position (pointing down).
Inlet screen is clogged or suction
tube is not immersed. Clean debris off inlet screen and
make sure suction tube is immersed
in fluid.
Pump was not primed with flushing
fluid. Remove suction tube from paint.
Prime pump with water or sol-
vent-based flushing fluid, page 11.
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 20.
AutoPrime may need replacement.
Turn power switch ON and listen for
“tap” in pump. If you do not hear
“tap”, AutoPrime is damaged. Take
sprayer to Graco/Airlessco autho-
rized service center.
Inlet valve check ball or seat is dirty Remove inlet fitting. Clean or
replace ball and seat.
Outlet valve check ball is stuck. SP300 and Mustang 3100: Insert
screw driver in slot and remove
Easy-Access
™
door. Unscrew outlet
valve with a 3/4 in. socket. Remove
and clean assembly.
SP200 and Mustang 2400:
Remove outlet fitting and clean out-
let check ball.
Suction tube is leaking. Tighten suction tube connection.
Inspect for cracks or vacuum leaks.
Pump does not prime with fluid. Remove suction tube from paint.
Prime pump with water or sol-
vent-based flushing fluid.
Problem Cause Solution