Nidec LSA 52.3 - Lubricants; Greases; Air Filter; Cleaning

Electric Power Generation
Installation and maintenance
5382 en - 2022.11 / h
LSA 52.3 / LSA 53.2 / LSA 54.2
Industrial Range Alternators
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5.4 LUBRICANTS
5.4.1 Greases
Recommended lubricant:
MOBIL POLYREX EM (polyurea base).
Recommendation for a substitution grease choice:
Mineral oil or PAO (SHC)
Base (soap) grade NLGI 2
Lithium complex base (Lithium base accepted)
Basic viscosity of oil at 40°C: from 100 to 200 mm2/s
Dye penetration test (DIN 51817): 2% minimum
Greases recognised as possible substitution grease:
SKF LGWA2 (lithium complex base). Recommended
lubricant):
CASTROL LMX NLGI2
TOTAL Multis complex EP2
CAUTION:
THE USE OF A SUBSTITUTION GREASE REDUCES
THE RE-LUBRICATING PERIOD BY 40%.
NOTE:
Lithium soap and lithium complex can be mixed.
Lithium complex and calcium lithium soap can be
mixed.
If the brand of grease is changed, it is recommended to
do intense lubrication to eliminate the old grease.
NOTE:
Mixing different types of grease never improves the
positive properties of greases! Mixing of different
types of grease must be done only after obtaining
agreement from the grease supplier or after cleaning
off the old grease from the bearing.
5.5 AIR FILTER
5.5.1 Cleaning
5.5.1.1 Air Filter Cleaning Frequency
The frequency of cleaning depends on the on-site
conditions and may vary.
Cleaning of the filter becomes necessary if the temperature
of the stator winding (measured by probes) indicates an
abnormal increase.
5.5.1.2 Air filter cleaning procedure
The filter element (flat or cylindrical) is immersed in a tank
of cold or warm water (temperature less than 50°C). Use
water with detergent added.
Shake the filter gently to ensure that the water flows
through the filter in both directions.
When the filter is clean, rinse it with clear water.
Drain the filter properly (there must be no more formation
of droplets).
Refit the filter on the machine.
CAUTION:
DO NOT USE WATER WITH A TEMPERATURE HIGHER
THAN 50°C, DO NOT USE SOLVENTS.
NOTE:
Do not clean the filter using compressed air. This
procedure would reduce filter efficiency.
5.6 SCREW TIGHTENING
5.6.0 General information
It is recommended to use a thread-locking compound on all
fastening screws, or plugs (except for electrical contacts)
that have been loosened or disassembled during any
operation.