Problem Possible cause Correction
Low capacity /
pressure.
Shut-off valve in the suction line (partly) closed. Fully open the shutoff valve.
Under-shimming of the pressure shoes. Fit the correct number of shims.
Hose rupture or badly worn hose.
Replace the hose. Refer to
"Changing the hose" on
page 46
(Partial) blockage of the suction line or too little
product on the suction side.
Ensure that the suction line is
clear of blockages and that
sufficient product is available.
Connections and hose clamps not correctly
mounted, which makes the pump suck air.
Check the connections and the
hose clamps. Tighten if
necessary.
The filling degree of the pump hose is too low,
because the speed is too high in relation to the
viscosity of the product to be pumped and the
inlet pressure. The suction line can be too long
or too narrow or a combination of these factors.
In case of doubt, consult your
Bredel representative.
Severely worn pressing shoes
Check surface condition of the
pressing shoes. Replace if
necessary.
Vibration of
the pump and
pipework.
Suction and discharge lines are not secured
correctly.
Check and secure pipework.
High pump speed with long suction and
discharge lines or high relative density or a
combination of these factors.
Reduce pump speed. Reduce the
line lengths on both suction and
discharge where possible. In
case of doubt, consult your
Bredel representative.
Too narrow diameter of suction and/or
discharge line.
Increase the diameter of the
suction/ discharge lines.
78 m-bredel-25-32-en-05
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