19
MANUAL - SPRAY GUN CLEANERS - UG5000W SERIES
Revision 2019-3
(4" UDP4TA Pump shown but procedures are the same for the
2" UDP2TAB Pump)
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 log-on to Service Channel and
Fixxbook or call the Uni-ram Service Engineer. The warranty on
the diaphragm pump is two years from date of purchase.
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 pro-
cedure may have to be repeated several times. If this procedure does not work, replace
the pump.
•
Cause: Contaminants in the air supply (water, oil, solid particles 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 regulator.
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.
2" pump
2" pump
4" pump
4" pump
