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Troubleshooting Guide for Pumps

Qualora si verificassero dei malfunzionamenti alla pompa o ci fossero degli inconvenienti nel momento dell’utilizzo, molte volte le cause e i rimedi sono assolutamente semplici e di immediata fattura. Pertanto potete verificare la natura dell’inconveniente occorso alla vostra pompa nella tabella sottostante.

PROBLEM POSSIBLE CAUSE SOLUTION
The pump runs but does not produce noise or pressure. The pump is not primed and is running dry. Check if there is water in the suction line.
Check if the delivery (gun) is open.
Check that the valves are NOT blocked.
The pump runs but is too noisy and/or does not reach the expected pressure. Oversized or worn nozzle.
Insufficient water supply.
Pressure control valve is not set or working properly.
Worn plunger seals.
Low speed of rotation.
Replace the nozzle.
Clean the filter. Replace the filter with an appropriate sized filter. Eliminate any possible intake of air.
Check the size of the suction pipe and replace if necessary with a larger diameter pipe.
Calibrate the valve.
Check the status of the seat of the seal.
Replace the seals.
Check the motor and the drive.
The pump comes up to pressure but pulsates and vibrates strongly. Foreign particles in the valves.
Worn valves.
High inlet water temperature.
Worn plunger seals.
Clean the valves.
Replace the valves.
Reduce the water temperature.
Replace the seals.
The pump is very noisy. Worn bearings.
High inlet water temperature.
Problems with the pump-motor connection.
Replace the bearings.
Reduce the water temperature.
Check the status of the keys, flexible coupling or pulley.
Short plunger seal life. Cavitation or air in the system.
Damaged ceramic plunger.
Excessive pressure and / or temperature of the pumped water.
Check the status and size of the suction pipe and replace if necessary with a larger diameter pipe.
Replace the plunger.
Check the pressure and the temperature of the inlet water.
Water in the oil. Worn oil seal ring shaft – plunger.
If the oil is milky (emulsified), but the level does not increase in the crankcase, it means there is only condensation.
Replace the ring seal.
Change the oil more frequently.
Water leakage between the crankcase and the
manifold housing.
Worn seal pack.
Worn plunger.
Worn plunger stop seal.
Replace seal pack.
Replace plunger.
Replace seal.
Oil leakage between the crankcase and the
manifold housing.
Worn plunger-shaft oil seal. Replace the seal.
Short bearing life. Problems with the pump-motor connection.
The oil has not been changed regularly.
Excessive pressure of the pumped water.
Check the status of the keys, fl exible coupling or pulley.
Change the oil as instructed in the maintenance manual for the pump.
Check the pressure.

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LEUCO S.p.A.
contact us at

Via Umberto Degola, 25
42124 Reggio Emilia (Italy)

Phone +39 0522 927036
Fax +39 0522 275551 -
+39 0522 926422
Internet www.hawkpumps.com
E-mail info@hawkpumps.com

VAT number IT00607420353

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