Pratissoli KF5M Serie Manuel D'utilisation Et D'entretien page 28

The pressure supplied by the pump is insufficient:
‑ Use is or has become higher than the capacity of
the pump.
‑ Insufficient revolutions per minute.
‑ Excessive leakage from the pressure seals.
‑ Imperfect functioning of the pressure control
valve.
‑ Worn valves.
Pump overheats:
‑ The pump is working in overpressure conditions
or pump rpm is higher than the nominal value.
‑ Oil in the pump casing is not at level or not the
recommended type as detailed in chapter 7
(see par. 7.6).
‑ Excess belt tension or joint or pulley alignment is
incorrect.
‑ Excessive pump tilt during operation.
Vibrations or hammering on pipes:
‑ Air suction.
‑ Faulty operation of pressure control valve.
‑ Valves malfunction.
‑ Non‑uniformity of transmission motion.
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