Troubleshooting
28
310645H
Material runs out of bottom of sprayer RotoFlex HD Pump worn out
Replace hose.
Loose fittings
Check and retighten all fittings.
No air from compressor
Gun air valve closed
Open gun air valve.
Gun needle plugged
Clean needle and retry.
Lines not connected
Check all quick disconnect connec-
tions to gun and hoses.
Damaged hose
Replace hose.
Worn compressor
Service compressor. Contact a quali-
fied Graco Service Center.
Speed of application too slow
Material too thick
Thin material.
Nozzle too small
Change nozzles to a larger size. See
Operation Manual, Recommended
Nozzle Selection Chart, page 20.
Speed of application too slow (cont.)
Flow control set too low
Increase flow control setting
Plugged or dirty gun
Relieve Pressure
, page 7. Clean
gun.
Kinked hose
Unkink hose.
Gun fluid flow adjustment set too low Increase flow adjustment with flow
adjustment nut.
Intermittent flow/sputtering or air in
material
Hopper connection not tight
Check gasket. TIghten connection.
Debris in system
Clean
Air quick disconnect does not stay
connected.
Dirty or corroded fitting
Clean thoroughly. Soak in oil. Apply a
few drops of light oil.
Gun will not shut off
Worn nozzle or needle.
Relieve Pressure
, page 7. Replace
worn parts.
Debris in needle passage
Relieve Pressure
, page 7. Clean.
Fluid leaking at Flow Adjustment Nut Damaged seal.
Relieve Pressure
, page 7. Replace
seal.
Needle adjustment won’t adjust
Dirty threads
Clean threads
Nozzle not on gun
Put nozzle on gun
Flow nut set to maximum adjustment Turn flow nut adjustment the other
way
Problem
Cause
Solution