Graco RTX-650 - Manual (Page 15)

Troubleshooting
311771D 15
Speed of application too slow New pump hose not broken in
properly Run pump dry for no longer than 2
minutes.
Material too thick Thin material.
Nozzle too small Change nozzles to a larger size. See
Operation Manual, Recommended
Nozzle Selection Chart, page 10.
Plugged or dirty gun Relieve Pressure, page 6. Clean
gun.
Kinked hose Unkink hose.
Gun fluid flow adjustment set too low Increase flow adjustment with flow
adjustment nut.
Intermittent flow/sputtering Hopper connection not tight Check gasket. TIghten connection.
Debris in system Clean system.
Gun will not shut off Worn nozzle or needle. Relieve Pressure, page 6. Replace
worn parts.
Debris in needle passage Relieve Pressure, page 6. Clean.
Fluid leaking at Flow Adjustment Nut
on gun Damaged seal. Relieve Pressure, page 6. Replace
seal.
Fluid leaking out of either plug on gun Missing or damaged o-rings Relieve Pressure, page 6. Replace
o-rings.
Gun damaged Replace gun.
Needle adjustment on gun won’t
adjust Dirty threads Clean threads.
Nozzle not on gun Put nozzle on gun.
Problem Cause Solution