Graco 16N661 Operation - Repair - Parts page 26

Troubleshooting
Problem
Sprayer sprays with poor results
Paint leaks from sprayer trigger area.
Spray Pattern Diagnostics
Problem
Spray pattern is pulsating:
Spray pattern has tails:
ti15526a
Spray pattern has dripping:
26
Cause
Spray tip is partially clogged
Spray tip is not in correct position
Incorrect spray tip for application of
material.
Spray tip filter is partially clogged or damaged.
Flexible suction tube strainer is partially
clogged.
Spray tip is worn or damaged
Material being sprayed is aerated because it
was shaken.
Pressure control knob is too low.
Material being sprayed is too cold to spray.
Inlet or outlet valve fittings are worn.
Pump has reached its maximum life.
Cause
Operator is moving too fast while spraying.
Spray tip or spray tip filter is clogged.
Pressure control knob is too low.
Incorrect spray tip for application of
material.
Material not compatible with sprayer.
Inlet or outlet valve fittings are worn.
Sprayer is moving too slow for material.
Sprayer is too close to target surface.
Holding trigger while changing spray
direction.
Incorrect spray tip for application of
material.
Pressure control knob is too high.
Spray tip is worn or damaged.
Solution
See Unclogging Spray Tip/Guard Assembly,
page 14.
Rotate spray tip to SPRAY position.
See Reversible Spray Tip Selection Chart, page
12.
Clean or replace spray tip filter. See page 14.
Clean or replace flexible suction tube. See page 15.
Replace spray tip. See Install Spray Tip/Guard
Assembly, page 13.
Do NOT shake material. Stir the material or check
the manufacturer's recommendation for the material
being sprayed.
Turn up pressure control knob.
Warm material.
See Outlet Valve Fitting Repair, page 23 and Inlet
Valve Removal/Service, page 22.
Replace pump.
Solution
Slow speed of movement.
Unclog spray tip or clean spray tip filter, page 14.
Turn up pressure control knob.
See Reversible Spray Tip Selection Chart, page 12.
Switch material.
See Outlet Valve Fitting Repair, page 23 and Inlet
Valve Removal/Service, page 22.
Move sprayer faster while spraying.
Move sprayer away from surface 10 in. (25 cm)
Release trigger when changing directions.
See Reversible Spray Tip Selection Chart, page 12.
Turn down pressure control knob.
Replace spray tip. See Install Spray Tip/Guard
Assembly, page 13.
3A2854G