Servicing - Maintenance; Safety Measures; Regular Maintenance; Fault Detection - Leroy Somer LSA 49.1 4P Manuel D'utilisation Et D'entretien

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 greasable. It is advisable to lubricate the
machine during operation. The lubrication characteristics are
given in the table below.
NDE / DE bearing
Quantity of grease
Lubrication interval
Lubrication intervals are given for grease type
LITHIUM - standard - NLGI 3.
The factory lubrication is performed with grease :
ESSO UNIREX N3.
Before using another grease, check for compatibility with the
original one. Monitor the temperature rise in the bearings,
which should not exceed 60°C above the ambient
temperature. Should this value be exceeded, the machine
must be stopped and checks carried out.
14
INSTALLATION AND MAINTENANCE
LSA 49.1 4P
ALTERNATORS
SERVICING - MAINTENANCE
6322 C3 6320 C3
60 gr or cm3 50 gr or cm3
4500 hrs of operation
4.2.4 - Electrical servicing
Cleaning product for the windings
WARNING
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 above list of
authorised 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
WARNING
Cleaning the machine using water 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 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.
Ref. 3007 GB - 4.33/a - 10.00