Short Circuit Method
The short circuit method is a process that should only be performed by a technician qualified in the safe
operating practices required around generator sets. Contact the factory for detailed instructions, should
this method be chosen.
4.3 BEARINGS
All bearings are supplied from the factory pre-packed with Athlon Generator grease, conforming to the
specifications of Kluber Asonic GHY 72 grease. Do not mix with any grease of different specifications.
Mixing grease of differing specifications will reduce bearing life.
The specification for Athlon grease is available on request from the factory. Lifetime Lubricated
bearings are fitted with integral seals and are not greasable.
The life expectancy of bearings in service is a direct function of the working conditions and the
environment. High levels of vibration from the drive engine or misalignment of the set will stress the
bearing and reduce its service life.
If the vibration limits set out in BS5000-3 and ISO 8528-9 are exceeded, bearing life will be reduced.
Long stationary periods in an environment where the generator is subject to vibration can also cause
false brinelling (surface failure), which puts flats on the balls, and grooves on the races, leading to
premature failure. Very humid atmospheric or wet conditions can emulsify the grease, causing corrosion
and deterioration of the grease, leading to premature failure of the bearings.
For normal situations, users may expect to be able to obtain 30,000 hours service life from Lifetime
Lubricated bearings, and 40,000 hours from greasable bearings
