Graco 16N656 Paint Sprayer User Manual


 
Troubleshooting
26 3A2308C
Spray Pattern Diagnostics
Paint leaks from bottom of pump
module.
Piston seal failure. Replace pump module. See Repair
manual.
Replace piston seals. See Repair
manual.
Water or thin cleaning fluids drip from
bottom of pump module.
Thin fluids commonly drip while
spraying at high pressure.
After storage, the piston seals need
to be energized prior to next use to
prevent leakage. To energize, follow
steps below:
a. Prime system with flushing fluid.
b. Spray at low pressure setting “1”
for 10 seconds.
c. Drain fluid. You are now ready to
spray.
Cannot squeeze bag to extinguish air
out of liner with a new lid.
O-ring has set in check valve. Lightly poke bottom of check valve on
underside of lid to release valve.
O-ring in check valve is enlarged from
solvents.
Replace lid.
Check valve is frozen from cured
material.
Replace lid.
Sprayer shuts down after 1.5 seconds
of spraying and yellow light flashes.
Pressure is too high. Turn pressure control knob counter-
clockwise.
Increase tip size.
Liquid is squirting out of accumulator. Accumulator is worn out. Replace accumulator.
Problem Cause Solution
Problem Cause Solution
Spray pattern is pulsating:
Operator is moving too fast while spraying. Slow speed of movement.
Tip or tip filter is clogged. Unclog tip or clean tip filter, page 18.
Spray pattern has tails:
Pressure control is too low. Turn up pressure control.
Incorrect tip for application of
material.
Change tip.
Inlet or outlet valves are worn. See Repair manual.
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