Graco 16N654 Manual De Usuario

Troubleshooting 

26

3A2308C

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. 

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.

ti15526a