Special Maintenance; Dismantling And Disposal; Problems, Causes And Solutions - Comet MP Series Use And Maintenance Manual

- bottlenecks in the intake circuit (inadequate pipe section, dirty filter, very dense liquid being
pumped, etc)
- the use of very aggressive chemicals

7.2 SPECIAL MAINTENANCE

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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.
INTERVAL FOR MAINTENANCE INTERVAL FOR MAINTENANCE INTERV
Every 300 hours
At the end of every season
or once a year
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

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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.
PROBLEM
The pump does not prime
The pump does not reach
maximum pressure.
Irregular pressure
and water flow (pulsating)
Excessive vibration in delivery circuit
Excessive noise associated
with drop in the oil level
Excessive consumption of oil
and/or oil is whitish colour
(presence of water in oil)
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Check the intake and delivery valves (1)
Check diaphragms and replace if necessary (2)
Replace the oil (3)
Check the pump screws are tight (4)
CAUSE
Water intake
Adjustment valve positioned
under pressure
Speed of pump rotation is inadequate
Unsuitable application
(for example: worn nozzle or too large nozzle)
Water intake
Pressure accumulator not correctly inflated
Bottlenecks in intake circuit
Rupture of one or more diaphragms
ACTION
"SWITCHING OFF" section. "SWITCHING OFF"
SOLUTION
Check the intake circuit is intact
Set pressure to zero
and put pump in bypass
Restore correct rotation speed
Replace application
Check the intake circuit is intact
Restore correct inflation
Check intake circuit
Refer to instructions in section 7.1.1.
essive