Hitachi RTX 900 - Manual (Page 26)

Troubleshooting
26 311772G
Speed of application slow or slower Material too thick Thin material.
Nozzle too small Change nozzles to a larger size. See
Operation manual 311768.
Too much air being used. Partially close gun air valve to reduce
air flow.
Pump hose worn Replace hose.
Plugged or dirty gun Relieve Pressure, page 6. Clean
gun.
Kinked hose Unkink hose.
Gun adjustment set too low Increase flow adjustment with flow
adjustment nut.
Too many items on same circuit Unplug other items from circuit.
Extension cord too long or wrong
gauge Use a different extension cord. Refer
to Grounding and Electric Require-
ments, page 6.
Intermittent flow/sputtering Hopper connection not tight Check gasket. TIghten connection.
Debris in system Clean system.
Quick disconnect does not stay con-
nected. 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 6. Replace
worn parts.
Debris in needle passage Relieve Pressure, page 6. Clean.
Fluid leaking at Flow Adjustment Nut Damaged seal. Relieve Pressure, page 6. Replace
seal.
Fluid leaking out of either plug Missing or damaged o-rings Relieve Pressure, page 6. Replace
o-rings.
Gun damaged Replace gun.
Needle adjustment won’t adjust Dirty threads Clean threads.
Nozzle not on gun Put nozzle on gun.
Problem Cause Solution