Fault description Cause Remedy
Muffler black contaminated/oily compressed air Improve air quality, install
fine filter in front of the
pump in the inlet line
Pump is not working, air not
warming up
Air controller stuck clean, replace
Foreign body/contamination clean, replace if necessary,
provide better air quality
chemical effects (o-rings swollen) check, correct
Valve in conveyed direction
closed
open
12.2
Troubleshooting for Lub-O-DryExx
®
Diaphragm compressed air pump
Lub-O-DryExx
®
Article No. 182831
WILDEN compressed air diaphragm pump type P.025
Fault description Cause Remedy
Pump not working or
running too slowly
Incorrect
pressures
Ensure that the drive pressure is at least 0.35 bar
(5 ps) above the starting pressure and that the
differential pressure (the dif
ference between the
drive pressure and fluid counterpressure) is at
least 0.7 bar (10 ps).
Air filter not clear Check the air filter in the compressed air line for
foreign bodies.
Air impurities Check the pump for extreme air leaks (blow out).
This would be a sign of worn seals/holes in the
compressed air valve, pilot valve, piston rod.
Compressed air
line blocked
Disassemble the pump and check for blockages in
the compressed air channels and for foreign
bodies preventing the movement of internal parts.
Ball return valves
stuck
Check pump for stuck ball return valves. If the
product being conveyed is not compatible with the
pump elastomers, these can swell up. Replace
ball return valves and seals with parts made from
appropriate elastomers. The valve balls also
become smaller with increasing wear and can
therefore become stuck in the valve seats. In this
case, replace valve balls and valve seats.
Diaphragm
broken
Check pump for broken internal diaphragm plate.
In this case, the pilot piston would no longer move.
Blockage in the
vent opening
Remove the plug from the vent opening for
outgoing air muf
fler
.
Pump is running, but is
not conveying any or
only little fluid.
Cavitation of the
pump
Check pump for cavitation; slow down the pump
speed so that highly viscous material can flow into
the pump chambers.
Troubleshooting
Troubleshooting for Lub-O-DryExx® Diaphragm compressed air pump
84Rev. 02-09.2017
To Next Page
Loading...
