3M Graco 50261 Manuel D'instructions page 9

PROBLEM
Pattern is off-set or heavy on one end
Pattern is heavy in the centre
Pattern is split
PROBLEM
Starving Fan Pattern.
Fan pattern begins to narrow down.
Will not spray.
Fluid leaking/dripping from PPS cup.
Fluid leaking/dripping from gun.
Excessive overspray.
Troubleshooting
CAUSE AND SOLUTION
One or more Air Horn holes plugged (Clean Air Cap).
Fluid Needle Tip damaged (Replace Fluid Needle Tip).
Fluid Nozzle damaged or partially blocked (Clean and/or replace Fluid Nozzle).
Air Pressure is too low (Increase Air Pressure).
Fan Pattern set too narrow (Open Fan Pattern).
Material is too thick (Reduce / Thin the mix).
Air Pressure is too high (Reduce Air Pressure).
Fan Pattern set too wide (Close down Fan Pattern).
SOLUTION
PPS liner bottomed out on top of strainer or collapsed
with PPS cup below gun, pull trigger to re-open liner, re-connect air and spray mix without purging air
from liner).
Air supply pressure drops due to air supply defects such as other air tools being used draws down
system pressure & CFM flow.
Not enough flow/air pressure at gun (Check air supply source and hose).
Fluid needle not open enough (Open fluid needle more).
Mix is too thick for fluid tip size (Change to larger size).
PPS cup lid loose (Tighten PPS Locking Collar).
Crack in PPS Lid or Liner (Replace).
PPS lid spout not fully engaged with PPS Adapter.
Check for missing or damaged O-ring (34) at base of Fluid Nozzle on the Fluid/Adapter Housing.
Fluid needle packing nut too tight or binding (Loosen nut or lubricate needle shaft).
Needle tip damaged (Replace).
Fluid Nozzle nicked or damaged (Replace).
Mix residue dried in gun (Clean & Lube gun).
Too much air pressure (Reduce air pressure).
Gun too far from work surface (Move in and keep the fan pattern perpendicular to the surface to
be sprayed).
9
around strainer, blocking flow (Disconnect air,