DOSEURO
®
XMPE0TMB125SST014
7/12
1st Edition - 2014
Troubleshooting
This chapter describes some inconveniences that may arise during machine use.
We propose some possible interventions: it is good practice to initially attempt to resolve a
problem applying the most simple of solutions. Never attempt repairs if unsure of what you are
about to do: greater damage may be caused.
The indications described in the following table help in the event of troubleshooting.
TROUBLESHOOTING
Inconveniences
Causes
Solutions
Low delivery pressure
Low flow rate
1 - Clogged suction system
:
Clean suction filter. Check the
suction piping and the feed tank
for
obstructions
or
partially
closed valves
2 - Worn safety relief/vent
valve seat:
Check
the
safety
relief/vent
valve, if the liquid leaks - switch-
off the pump and check
3 - pump not completely
primed (air bubble in the
suction pipe):
Excessive suction height, respect
NPSHr value, install a suction
dampener
4
– incorrectly connected
motor:
Check the motor plate again for
the correct wiring sequence.
Check the phases.
5 - dirty pump valves:
Inspect valve units. Clean or
replace
the
components
if
necessary.
6 - Oil leaks through the filler
and drain caps
Loose caps or damaged gaskets,
to be replaced.
7 - Damaged piston seal
gasket.
Air inlet in oil chamber through
piston seals. Scratched piston
Replace the seal gaskets or the
piston
8 - insufficient oil in oil
chamber
Insufficient interposed fluid: bring
the piston to 0% FDC by acting
on the adjusting knob, remove
the filler cap and top-up with oil,
reposition the cap.
9 - air entering the head
Verify the presence of inlet air in
the suction pipe. Check junctions
between pipes, seals around the
valve stems, and the connections
of the instruments.
Check the diameter and piping
route.
10 - insufficient suction
pressure
Increase the suction pressure.
Reduce the suction height or
increase the liquid level in the
feed tank.
11 - Circuitous piping route
with the presence of chokes;
pipe inner diameter smaller
than the valve passage area
Check diameter and piping route
3.2
ATTENTION!
