10
INSTALLATION AND MAINTENANCE
LSA 43.2/44.2 - 4-POLE
ALTERNATORS
SERVICING / MAINTENANCE
3434 en - 06.2007 / g
LEROY-SOMER
4 - SERVICING / MAINTENANCE
4.1 - Safety measures
Servicing or troubleshooting must be carried out strictly
in accordance with instructions so as to avoid the risk of
accidents and to maintain the machine in its original
state.
All such operations performed on the alternator should
be undertaken by personnel trained in the
commissioning, servicing and maintenance of electrical
and mechanical components.
Before any intervention on the machine, ensure that it cannot
be started by a manual or automatic system and that you
have understood the operating principles of the system.
4.2 - Regular maintenance
4.2.1 - Checks after start-up
After approximately 20 hours of operation, check that all fixing
screws on the machine are still tight, plus the general state of
the machine and the various electrical connections in the
installation.
4.2.2 - Cooling circuit
It is advisable to check that circulation of air is not reduced by
partial blocking of the air intake and outlet grilles: mud, fibre,
grease, etc.
4.2.3 - Bearings
The bearings are permanently greased: approximate life of
the grease (depending on use) = 20,000 hours or 3 years.
Monitor the temperature rise in the bearings, which must not
exceed 60 °C above the ambient temperature. Should this
value be exceeded, the machine must be stopped and checks
carried out.
4.2.4 - Electrical servicing
Cleaning product for the windings
Do not use: trichlorethylene, perchlorethylene,
trichloroethane or any alkaline products.
Certain strictly defined pure volatile degreasing agents can be
used, such as:
- Normal petrol (without additives); inflammable
- Toluene (slightly toxic); inflammable
- Benzene (or benzine, toxic); inflammable
- Ciclohexare (non toxic); inflammable
Cleaning of the stator, rotor, exciter and diode bridge
The insulating components and the impregnation system are
not at risk of damage from solvents (see the list of authorized
products).
Avoid letting the cleaning product run into the slots. Apply the
product with a brush, sponging frequently to avoid
accumulation in the housing. Dry the winding with a dry cloth.
Let any traces evaporate before reassembling the machine.
4.2.5 - Mechanical servicing
Cleaning the machine using a water spray or a
high-pressure washer is strictly prohibited.
Any problems arising from such treatment are not
covered by our warranty.
The machine should be cleaned with a degreasing agent,
applied using a brush. Check that the degreasing agent will
not affect the paint.
Compressed air should used to remove any dust.
If filters have been added to the machine after manufacture
and do not have thermal protection, the service personnel
should clean the air filters periodically and systematically, as
often as necessary (every day in very dusty atmospheres).
Cleaning can be performed using water for dry dust or in a
bath containing soap or detergent in the case of greasy dust.
Petrol or chloroethylene can also be used.
After cleaning the alternator, it is essential to check the
winding insulation (see sections 3.2 and 4.8).
4.3 - Fault detection
If, when commissioned, the alternator does not work
normally, the source of the malfunction must be identified.
To do this, check that:
- the protective devices are fitted correctly
- the connections comply with the diagrams in the manuals
supplied with the machine
- the speed of the unit is correct (see section 1.3)
Repeat the operations defined in section 3
CAUTION
CAUTION
