
MANUAL - UG4000 SERIES SPRAY GUN CLEANERS REVISED 2012-03A
TROUBLESHOOTING
SYMPTOM REASON CORRECTIVE ACTION
WASH LIQUID DOES
NOT FLOW AND PUMP
MAKES A PUMPING
NOISE
Drain valve closed Open drain valve (put in verticle position), if not
already open Check wash liquid level. Add liquid
if less than 1/2 full.
Liquid level too low Check wash liquid level. Add liquid if less than
1/2 full.
Debris in pump Follow Procedure 1, "Blocked Fluid Passage in
Diaphragm Pump"
WASH LIQUID DOES
NOT FLOW AND PUMP
MAKES A HISSING
NOISE
Water in air line causes
pump to stall
Follow Procedure 2, "Blockage in Air Passage in
Diaphragm Pump"
WASH LIQUID DOES
NOT FLOW AND PUMP
DOES NOT MAKE A
NOISE
Pump leaks Replace pump
Blockage in air passage Follow Procedure 3, "Blocked Passage in Air
Line".
PUMP DOES NOT STOP
UNLESS TIMER IS
TURNED BY HAND OR
AIR IS SHUT OFF
Defective Timer Repace Timer.
TIMER KNOB SPINS
BACK WHEN TURNED
Defective Timer Repace Timer.
INSIDE WALL OF TANK
IS COATED WITH PAINT
EVEN THOUGH OPERA-
TOR MAINTAINS TANK
Solvent lacks cleaning
strength
Replace solvent with solvent that is formulated
for type of paint used and for use with automatic
spray gun cleaning
GUNS NOT CLEAN,
PUMP WORKING,
SOLVENT FLOW
NORMAL
Trigger not locked in
open position
Use Trigger Lock Spring
Spray gun is not properly
installed on to nozzle
Re-install with proper adapter
Incompatible solvent Replace incompatible solvent with solvent for-
mulated for type of paint used and for Automatic
Spray Gun Cleaners
Low pressure in air sup-
ply
Increase air pressure to a minimum of 85 PSI
Plugged jets Remove and clean by blowing air through the
jets. If not successful, replace.
GUNS NOT CLEAN,
WASH SOLVENT IS
MILKY WHITE
Wash solvent is contami-
nated with water
Replace or recycle wash solvent
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