Graco MAGNUM LTS 15 257060 Operation Manual page 28

Troubleshooting
Problem
Pump does not prime.
Pump does not prime.
28
Cause
Prime/Spray Valve is in SPRAY posi-
tion.
Inlet screen is clogged or suction
tube is not immersed.
Pump was not primed with flushing
fluid.
Inlet screen is clogged or suction
tube is not immersed.
Prime/Spray Valve is in SPRAY posi-
tion.
Inlet screen is clogged or suction
tube is not immersed.
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.
Solution
Turn Prime/Spray Valve to PRIME
position (pointing down).
Clean debris off inlet screen and
make sure suction tube is immersed
in fluid.
Remove suction tube from paint.
Prime pump with water or
solvent-based flushing fluid, page 11.
Clean debris off inlet screen and
make sure suction tube is immersed
in fluid.
Turn Prime/Spray Valve to PRIME
position (pointing down).
Clean debris off inlet screen and
make sure suction tube is immersed
in fluid.
Remove suction tube from paint.
Prime pump with water or
solvent-based flushing fluid, page 11.
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/M
AGNUM
rized service center.
Remove inlet fitting. Clean or replace
ball and seat.
ProLTS 17 and ProLTS 19: Insert
screw driver in slot and remove
™
Easy-Access door, page 8.
Unscrew outlet valve with a 3/4 in.
socket. Remove and clean assembly.
LTS 15 and LTS 17: 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.
autho-
313034H