Troubleshooting - Graco 16N658 Operation - Repair - Parts

Troubleshooting

This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing fluid
and moving parts, follow the Pressure Relief
Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
Problem
Sprayer makes no sound when
trigger is pulled
Sprayer makes sound but no material is sprayed
when trigger is pulled
24
Check everything in this Troubleshooting Table before you
bring the sprayer to an authorized service center.
Cause
Trigger is locked.
Power supply.
Sprayer circuit breaker has interrupted power.
Sprayer is not primed.
Prime/spray valve is in UP position.
Flexible suction tube is missing or improperly
installed.
Flexible suction tube strainer or vent valve or
vent holes are clogged.
Flexible suction tube o-rings are damaged or
missing.
Flexible suction tube damaged.
Spray tip is not in SPRAY position.
Spray tip is clogged.
Spray tip filter is clogged.
Pressure control knob is too low.
Sprayer has been tilted too far and suction tube
has lost contact with material.
No or low material in material cup.
Inlet valve is stuck from material residue left in
sprayer.
Pump is clogged, frozen, or has debris inside.
Material is leaking from hole in front of sprayer. Replace needle assembly.
Troubleshooting
Solution
Disengage trigger lock. See page 8.
Verify power to sprayer.
Push and hold Circuit Reset Button (page 6) to
restore power to sprayer.
Prime the pump. See Starting a New Job (or
Refilling the Material Cup), page 11.
Use pump access armor storage/startup tool to
clear pump of debris. See Storage, page 17.
Clean air vent holes or the air vent valve as your
model is equipped. See Shutdown and Clean-
ing, page 15.
Put valve DOWN to spray position.
Make sure flexible suction tube is properly
installed.
See Shutdown and Cleaning, page 15.
Replace flexible suction tube o-rings.
Replace flexible suction tube.
Turn spray tip to SPRAY position.
See Unclogging Spray Tip/Guard
Assembly, page 14.
Remove and clean spray tip filter. See Unclog-
ging Spray Tip/Guard Assembly, page 14.
Turn pressure control knob up.
Make sure material cup is filled with material.
Rotate flexible suction tube, page 9. Do not tilt
the material cup too far. Prime the pump. See
Starting a new Job (or Refilling the Material
Cup), page 11.
Refill material cup with material and prime the
pump.
Use pump access armor storage/startup tool to
clear pump of debris. If unsuccessful, see Stor-
age, page 17. See Inlet Valve Removal/Ser-
vice, page 21.
See Outlet Valve Fitting Repair, page 22 and
Inlet Valve Removal/Service, page 21.
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