Dual Pumps BP 125, Operating Instructions Manual, Page: 16 / 20

7.2 SPECIAL MAINTENANCE
CAUTION
• Only Skilled Technicians are authorised to carry out special maintenance.
• Dispose of waste oil correctly; do not throw it away in the environment
Follow the instructions in the table below for special maintenance.
1) check more frequently if liquids are used with suspended abrasive particles.
2) we recommend replacing diaphragms regardless of their condition if particularly
aggressive chemicals are used.
3) Oil must be changed when diaphragms are replaced; first oil change must take place after
300 hours
4) check more frequently if the pump operates in conditions of heavy vibration.
WARNING
• The data in the table are indications. Maintenance may be required more frequently in
cause of particularly heavy use.
8. DISMANTLING AND DISPOSAL
Only trained personnel are allowed to dismantle the pump in accordance with the current
regulations in the country where it is installed.
9. PROBLEMS, CAUSES AND SOLUTIONS
CAUTION
• Before undertaking any action, follow the instructions in the “SWITCHING OFF” section.
If it is not possible to restore correct operation of the pump using the information in the
table below, contact a Skilled Technician.
INTERVAL FOR MAINTENANCE ACTION
Every 300 hours Check the intake and delivery valves (1)
At the end of every season or once a year Check diagrams and replace if necessary
Replace the oil (3)
Check the pump screws are tight (4)
PROBLEM CAUSE SOLUTION
The pump does not prime Water intake
Adjustment valve positioned under
pressure Check the intake circuit is intact
Set pressure to zero and put pump
in bypass
The pump does not reach
maximum pressure Speed of pump rotation is
inadequate
Unsuitable application
(for example: worn nozzle or too
large nozzle) Restore correct rotation speed
Replace application
Irregular pressure and water
flow (pulsating) Water intake Check the intake circuit is intact
Excessive vibration in delivery
circuit Pressure accumulator not correctly
inflated Restore correct inflation
Excessive noise associated
with drop in the oil level Bottle necks in intake circuit Check intake circuit
Excessive consumpton of oil
and/or oil is whitish colour
(presence of water in oil) Rupture of one or more diaphragms Refer to instructions in section 7.1.i
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