5.3.5 Bearing re-assembly
A bearing can be refitted if it is known to be in perfect
condition. As far as possible we recommend to use a brand
new bearing
Before refitting a bearing, carefully clean the surface of the
bearing and the other parts of the bearing.
Measure the shaft diameter to check it is within the
recommended tolerances.
To install the bearing on the shaft, it is necessary to heat
the bearing. The heat source may be an oven or a space
heater (the use of oil baths is not recommended). The use
of an induction bearing heater is recommended.
CAUTION:
NEVER HEAT A BEARING TO MORE THAN 125°C
(257°F)
Push the bearing up to the shaft shoulder, and check after
cooling that the inner ring is still in contact with the
shoulder. Lubricate using the recommended grease. Fill
the bearing covers with new grease
5.4 Not applicable
5.5 LUBRICANTS
5.5.1 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)
Base oil viscosity at 40°C: 100 to 200 mm2/s
Dye penetration test (DIN 51817) : 2% minimum
Greases recognized 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 CONDUCE TO
REDUCE THE RE GREASING PERIOD OF 40 %
NOTE:
Lithium and complex lithium soap can be mixed
Lithium complex and calcium lithium soap can be
mixed
In case of change of grease brand it is recommended
to proceed to a massive greasing to waste the
previous grease.
NOTE:
Mixing different types of grease never give as result an
addition of the good greases properties ! Mixing of
different types of grease must be done only after
getting the grease supplier agreement or after cleaning
the bearing from the old grease
Electric Power Generation
Installation and maintenance
5654
en - 2017.
10
/
a
LSA 5
2
.2
MHV
Industrial Range Alternators
- 4 pole
26
