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12�1 General maintenance hints
Sulzer submersible pumps are reliable quality products, each being subjected to careful final inspection.
Lubricated-for-life ball bearings, together with monitoring devices, ensure optimum pump reliability provided that
the pump has been connected and operated in accordance with the operating instructions. However, should a
malfunction occur, do not improvise, but ask your Sulzer Customer Service Department for assistance.
This applies particularly if the pump is continually switched off by the current overload in the control panel, by
the thermal sensors of the thermo-control system, or by the seal monitoring system (DI).
Regular inspection and care is recommended to ensure a long service life. Service intervals vary for Piranha
pumps depending on installation and application. For recommended service interval details contact your local
Sulzer Service Centre. A maintenance contract with our Service Department will guarantee the best technical
service.
When carrying out repairs, only original spare parts supplied by the manufacturer should be used.
Sulzer warranty conditions are only valid provided that any repair work has been carried out in an Sulzer appro-
ved workshop and where original Sulzer spare parts have been used.
NOTE
ATEX- and FM-rated Piranha pumps are approved for use in hazardous locations. If an Ex-rated
pump is serviced or repaired in a workshop that is not Ex-approved then it must no longer be
used in hazardous locations. In that case the Ex nameplate must be removed and replaced by
the standard nameplate, or where instead a standard and a secondary Ex nameplate is fitted to
the pump the secondary nameplate must be removed.
12�2 Shredding system
The shredding system of the Piranha is a wearing part, and as such may need to be replaced. A reduction
in cutting performance can reduce the output. We recommend that the shredding system is inspected
regularly. This is particularly so if sewage containing sand is being pumped. Regular inspection and care is
recommended to ensure a long service life.
The Sulzer Service Organisation would be pleased to advise you on any applications you may have and to
assist you in solving your pumping problems.
12.3 Oil filling and changing
The motor chamber (Piranha-PE), and the oil chamber between the motor and the hydraulic section (Piranha
-PE & Piranha-S), have been filled at manufacture.
An oil change is only necessary:
•
at specified service intervals (for details contact your local Sulzer Service Centre).
• if the DI moisture sensor detects an ingress of water into the oil chamber or motor chamber.
• after repair work that requires draining of the oil.
• if the pump is being taken out of service the oil should be changed before storage.
12.3.1 Instructions on how to drain and fill the oil chamber
1. Loosen the plug screw enough to release any pressure that may have built-up, and re-tighten (for location
see pages 6, 7 and 8).
Before doing so, place a cloth over the plug screw to contain any possible spray of oil as the pump-
de-pressurises.
2. Place the pump in a horizontal position on a waste oil sump with the drain hole underneath.
3. Remove the plug screw and seal ring from the drain hole.
4. After the oil is fully drained rotate the pump so that the drain hole is positioned to the top.
5.
Select the required volume from the oil-fill quantities table and slowly fill with oil into the drain hole.
6.
Refit the plug screw and seal ring.
