MANUAL - SPRAY GUN CLEANERS - UG5000 SERIES
Revision 2008-02
12
TROUBLESHOOTING PROCEDURES
PROCEDURE 1
Blocked Fluid Passage In Diaphagm Pump
If the pump sounds like it is working but liquid does not flow, clear
the fluid passage as follows:
•
Remove suction tube from the pail and blow air at 85 PSI into
the INLET Sovent Hose (see diagram). Step on foot pedal.
This procedure may have to be repeated several times. If this
procedure does not help, blow some water into the suction
hose using a spray gun, wait one minute and step on foot
pedal. This procedure may have to be repeated several times.
If this procedure does not work, the pump must be replaced.
If you need to replace the pump call your local dealer. The war-
ranty on the diaphragm pump is two years from date of pur-
chase.
This procedure will also clear a blockage in the fluid line for the wash gun.
PROCEDURE 2
Blocked Air Passage In Diaphragm Pump
If there is a steady hissing sound and the pump is not cycling, the
spool valve has stalled due to a blocked air passage. Follow the
procedure below to clear the blockage.
•
Connect a blow gun to an 85 PSI source. Locate the blue
hose that extends from the air exhaust port of the diaphragm
pump. Use a blow gun to blow air into the open end of this
hose. Turn timer. If the procedure is successful, the pump will
start working. The procedure may have to be repeated sever-
al times. If this procedure does not work, replace the pump.
•
Cause: Contaminants in the air supply (water, oil, solid parti-
cles etc)
•
Preventative Action: If necessary, install an Airline (Moisture)
Filter.
PROCEDURE 3
Blocked Passage in Air Line
The components in the air line are the diaphragm pump, air valve, foot pedal, 3-way ball valve and regu-
lator. See the Flow Diagram and the section: Replacement Parts.
To troubleshoot a component:
1) Disconnect the air line to the component using the quick disconnect.
2) Step on foot pedal and check for presence of positive air pressure in the air line. If there is ample
positive air pressure, replace the component.
If air pressure is absent, there is a faulty component upstream. Reconnect the air line and check the
operation of the next component upstream by following steps 1 and 2 above.
