10
2010.10 / i
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 alternator 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, who must wear the appropriate personal
protective equipment for mechanical and electrical
hazards.
Before carrying out any work on the alternator, ensure that it
cannot be started by a manual or automatic system by isolating
the power in any cabinet or enclosure and make sure 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 îš¿xing
screws on the alternator are still tight, plus the general state of
the alternator 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, îš¿bre,
grease, etc. and to check whether the ventilation guards are
corroded or scratched.
4.2.3 - Bearings
The bearings are permanently greased: approximate life of the
grease = 20,000 hours or 3 years.
As an option, they are regreasable for the LSA 44.2. It is
advisable to lubricate the alternator during operation. Time
intervals and quantity of grease are given in the table below.
NDE/DE bearing
6315 C3 6309 C3
Quantity of grease 30 g 15 g
Regreasing interval 6000 hrs 10,000 hrs
Lubrication intervals are given for grease type
LITHIUM - standard - NLGI 3.
In the factory, the grease used for lubrication is:
ESSO UNIREX N3.
Before using another grease, check for compatibility with the
original one. Monitor the temperature rise in the bearings,
which must not exceed 50°C above the ambient temperature.
Should this value be exceeded, the alternator must be
stopped and checks carried out.
4.2.4 - Electrical servicing
Cleaning product for the windings.
CAUTION
Do not use: trichlorethylene, perchlorethylene,
trichloroethane or any alkaline products.
Certain strictly deîš¿ned pure volatile degreasing agents can be
used, such as:
- Normal petrol (without additives); inammable
- Toluene (slightly toxic); inammable
- Benzene (or benzine, toxic); inammable
- Ciclohexare (non toxic); inammable
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 alternator.
These operations must be performed at a cleaning station,
equipped with a vacuum system that collects and ushes
out the products used.
4.2.5 - Mechanical servicing
CAUTION
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 îš¿lters have been added to the machine after manufacture
and do not have thermal protection, the service personnel
should clean the air îš¿lters 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 identiîš¿ed.
To do this, check that:
- the protective devices are îš¿tted 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 deîš¿ned in section 3
INSTALLATION AND MAINTENANCE
LSA 43.2 / 44.2 - 4-poLe
ALTeRNAToRS
3434 en -
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